Search for "CuCl2" in Full Text gives 84 result(s) in Beilstein Journal of Organic Chemistry.
Beilstein J. Org. Chem. 2016, 12, 144–153, doi:10.3762/bjoc.12.16
Graphical Abstract
Figure 1: Hydrogen–deuterium exchange through acid-catalyzed imine–enamine tautomerization of 3h (0.5 M) and ...
Scheme 1: Benzylic oxygenation of benzoannulated azines and diazines (5).
Scheme 2: Classical (top) and new formal (bottom) synthesis of Mefloquine.
Scheme 3: Iron-catalyzed aerobic oxidation of papaverine (15).
Beilstein J. Org. Chem. 2015, 11, 2721–2726, doi:10.3762/bjoc.11.293
Graphical Abstract
Figure 1: Bioactive compounds containing 1,2-aminoalcohol motif.
Scheme 1: Copper-catalyzed radical aminooxygenation reaction of styrenes.
Figure 2: The copper-catalyzed three-component aminooxygenation of styrenes with NFSI and NHPI derivatives. R...
Scheme 2: The plausible mechanism.
Scheme 3: Selective reduction of the aminooxygenation product.
Beilstein J. Org. Chem. 2015, 11, 2209–2222, doi:10.3762/bjoc.11.240
Graphical Abstract
Scheme 1: Copper-catalyzed C–H amidation of tertiary amines.
Scheme 2: Copper-catalyzed C–H amidation and sulfonamidation of tertiary amines.
Scheme 3: Copper-catalyzed sulfonamidation of allylic C–H bonds.
Scheme 4: Copper-catalyzed sulfonamidation of benzylic C–H bonds.
Scheme 5: Copper-catalyzed sulfonamidation of C–H bonds adjacent to oxygen.
Scheme 6: Copper-catalyzed amidation and sulfonamidation of inactivated alkyl C–H bonds.
Scheme 7: Copper-catalyzed amidation and sulfonamidation of inactivated alkanes.
Scheme 8: Copper-catalyzed intramolecular C–H amidation for lactam synthesis.
Scheme 9: Copper-catalyzed intramolecular C–H amidation for lactam synthesis.
Scheme 10: Copper-catalyzed amidation/sulfonamidation of aryl C–H bonds.
Scheme 11: C–H amidation of pyridinylbenzenes and indoles.
Scheme 12: Mechanism of the Cu-catalyzed C2-amidation of indoles.
Scheme 13: Copper-catalyzed, 2-phenyl oxazole-assisted C–H amidation of benzamides.
Scheme 14: DG-assisted amidation/imidation of indole and benzene C–H bonds.
Scheme 15: Copper-catalyzed C–H amination/amidation of quinoline N-oxides.
Scheme 16: Copper-catalyzed aldehyde formyl C–H amidation.
Scheme 17: Copper-catalyzed formamide C–H amidation.
Scheme 18: Copper-catalyzed sulfonamidation of vinyl C–H bonds.
Scheme 19: CuCl2-catalyzed amidation/sulfonamidation of alkynyl C–H bonds.
Scheme 20: Cu(OH)2-catalyzed amidation/sulfonamidation of alkynyl C–H bonds.
Scheme 21: Sulfonamidation-based cascade reaction for the synthesis of tetrahydrotriazines.
Scheme 22: Copper-catalyzed cascade reaction for the synthesis of quinazolinones.
Scheme 23: Copper-catalyzed cascade reactions for the synthesis of fused quinazolinones.
Scheme 24: Copper-catalyzed synthesis of quinazolinones via methyl C–H bond amidation.
Scheme 25: Dicumyl peroxide-based cascade synthesis of quinazolinones.
Scheme 26: Copper-catalyzed cascade reactions for the synthesis of indolinones.
Beilstein J. Org. Chem. 2015, 11, 2132–2144, doi:10.3762/bjoc.11.230
Graphical Abstract
Scheme 1: Copper-catalyzed C–H bond halogenation of 2-arylpyridine.
Scheme 2: ortho-Chlorination of 2-arylpridines with acyl chlorides.
Scheme 3: Copper-catalyzed chlorination of 2-arylpyridines using LiCl.
Scheme 4: Copper-catalyzed C–H halogenation of 2-arylpyridines using LiX.
Scheme 5: Copper-mediated selective C–H halogenations of 2-arylpyridine.
Scheme 6: Copper-catalyzed C–H o-halogenation using removable DG.
Scheme 7: Copper-catalyzed C–H halogenations using PIP as DG.
Scheme 8: Copper-catalyzed quinoline C–H chlorination.
Scheme 9: Copper-catalyzed arene C–H fluorination of benzamides.
Scheme 10: Copper-catalyzed arene C–H iodination of 1,3-azoles.
Scheme 11: Copper-catalyzed C–H halogenations of phenols.
Scheme 12: Proposed mechanism for the C–H halogenation of phenols.
Scheme 13: Copper-catalyzed halogenation of electron enriched arenes.
Scheme 14: Copper-catalyzed C–H bromination of arenes.
Scheme 15: CuI-mediated synthesis of iododibenzo[b,d]furans via C–H functionalization.
Scheme 16: Cu-Mn spinel oxide-catalyzed phenol and heteroarene halogenation.
Scheme 17: Copper-catalyzed halogenations of 2-amino-1,3thiazoles.
Scheme 18: Copper-mediated chlorination and bromination of indolizines.
Scheme 19: Copper-catalyzed three-component synthesis of bromoindolizines.
Scheme 20: Copper-mediated C–H halogenation of azacalix[1]arene[3]pyridines.
Scheme 21: Copper-mediated cascade synthesis of halogenated pyrrolones.
Scheme 22: Copper-mediated alkene C–H chlorination in spirothienooxindole.
Scheme 23: Copper-catalyzed remote C–H chlorination of alkyl hydroperoxides.
Scheme 24: Copper-catalyzed C–H fluorination of alkanes.
Scheme 25: Copper-catalyzed or mediated C–H halogenations of active C(sp3)-bonds.
Beilstein J. Org. Chem. 2015, 11, 1425–1433, doi:10.3762/bjoc.11.154
Graphical Abstract
Figure 1: A sampling of propargylamine-derived triazoles with therapeutic effects includes alpha-tetrasubstit...
Figure 2: A tetrasubstituted carbon bearing an amine (red) can provide 100-fold increase in activity compared...
Scheme 1: KA2 coupling followed by tandem silyl deprotection and triazole formation.
Scheme 2: Silyl deprotection/click conditions applied to tert-butylacetylene. An identical yield is observed ...
Scheme 3: High overall yield of 1,2,3-triazole fully-substituted at the 4-position.
Beilstein J. Org. Chem. 2015, 11, 1274–1331, doi:10.3762/bjoc.11.142
Graphical Abstract
Figure 1: General representation of cyclophanes.
Figure 2: cyclophanes one or more with heteroatom.
Figure 3: Metathesis catalysts 12–17 and C–C coupling catalyst 18.
Figure 4: Natural products containing the cyclophane skeleton.
Figure 5: Turriane family of natural products.
Scheme 1: Synthesis of [3]ferrocenophanes through Mannich reaction. Reagents and conditions: (i) excess HNMe2...
Scheme 2: Synthesis of cyclophanes through Michael addition. Reagents and conditions: (i) xylylene dibromide,...
Scheme 3: Synthesis of normuscopyridine analogue 37 through an oxymercuration–oxidation strategy. Reagents an...
Scheme 4: Synthesis of tribenzocyclotriyne 39 through Castro–Stephens coupling reaction. Reagents and conditi...
Scheme 5: Synthesis of cyclophane 43 through Glaser–Eglinton coupling. Reagents and conditions: (i) 9,10-bis(...
Scheme 6: Synthesis of the macrocyclic C-glycosyl cyclophane through Glaser coupling. Reagents and conditions...
Scheme 7: Synthesis of cyclophane-containing complex 49 through Glaser–Eglinton coupling reaction. Reagents a...
Scheme 8: Synthesis of cyclophane 53 through Glaser–Eglinton coupling. Reagents and conditions: (i) K2CO3, ac...
Figure 6: Cyclophanes 54–56 that have been synthesized through Glaser–Eglinton coupling.
Figure 7: Synthesis of tetrasubstituted [2.2]paracyclophane 57 and chiral cyclophyne 58 through Eglinton coup...
Scheme 9: Synthesis of cyclophane through Glaser–Hay coupling reaction. Reagents and conditions: (i) CuCl2 (1...
Scheme 10: Synthesis of seco-C/D ring analogs of ergot alkaloids through intramolecular Heck reaction. Reagent...
Scheme 11: Synthesis of muscopyridine 73 via Kumada coupling. Reagents and conditions: (i) 72, THF, ether, 20 ...
Scheme 12: Synthesis of the cyclophane 79 via McMurry coupling. Reagents and conditions: (i) 75, decaline, ref...
Scheme 13: Synthesis of stilbenophane 81 via McMurry coupling. Reagents and conditions: (i) TiCl4, Zn, pyridin...
Scheme 14: Synthesis of stilbenophane 85 via McMurry coupling. Reagents and conditions: (i) NBS (2 equiv), ben...
Figure 8: List of cyclophanes prepared via McMurry coupling reaction as a key step.
Scheme 15: Synthesis of paracyclophane by cross coupling involving Pd(0) catalyst. Reagents and conditions: (i...
Scheme 16: Synthesis of the cyclophane 112 via the pinacol coupling and 113 by RCM. Reagents and conditions: (...
Scheme 17: Synthesis of cyclophane derivatives 122a–c via Sonogoshira coupling. Reagents and conditions: (i) C...
Scheme 18: Synthesis of cyclophane 130 via Suzuki–Miyaura reaction as a key step. Reagents and conditions: (i)...
Scheme 19: Synthesis of the mycocyclosin via Suzuki–Miyaura cross coupling. Reagents and conditions: (i) benzy...
Scheme 20: Synthesis of cyclophanes via Wurtz coupling reaction Reagents and conditions: (i) PhLi, Et2O, C6H6,...
Scheme 21: Synthesis of non-natural glycophanes using alkyne metathesis. Reagents and conditions: (i) G-I (12)...
Figure 9: Synthesis of cyclophanes via ring-closing alkyne metathesis.
Scheme 22: Synthesis of crownophanes by cross-enyne metathesis. Reagents and conditions: (i) G-II (13), 5 mol ...
Scheme 23: Synthesis of (−)-cylindrocyclophanes A (156) and (−)-cylindrocyclophanes F (155). Reagents and cond...
Scheme 24: Synthesis of cyclophane 159 derivatives via SM cross-coupling and RCM. Reagents and conditions: (i)...
Scheme 25: Sexithiophene synthesis via cross metathesis. Reagents and conditions: (i) 161, Pd(PPh3)4, K2CO3, T...
Scheme 26: Synthesis of pyrrole-based cyclophane using enyne metathesis. Reagents and conditions: (i) Se, chlo...
Scheme 27: Synthesis of macrocyclic derivatives by RCM. Reagents and conditions: (i) G-I/G-II, CH2Cl2, 0.005 M...
Scheme 28: Synthesis of enantiopure β-lactam-based dienyl bis(dihydrofuran) 179. Reagents and conditions: (i) ...
Scheme 29: Synthesis of a [1.1.6]metaparacyclophane derivative 183 via SM cross coupling. Reagents and conditi...
Scheme 30: Synthesis of a [1.1.6]metaparacyclophane derivative 190 via SM cross coupling. Reagents and conditi...
Scheme 31: Template-promoted synthesis of cyclophanes involving RCM. Reagents and conditions: (i) acenaphthene...
Scheme 32: Synthesis of [3.4]cyclophane derivatives 200 via SM cross coupling and RCM. Reagents and conditions...
Figure 10: Examples for cyclophanes synthesized by RCM.
Scheme 33: Synthesis of the longithorone C framework assisted by fluorinated auxiliaries. Reagents and conditi...
Scheme 34: Synthesis of the longithorone framework via RCM. Reagents and conditions: (i) 213, NaH, THF, rt, 10...
Scheme 35: Synthesis of floresolide B via RCM as a key step. Reagents and conditions: (i) G-II (13, 0.1 equiv)...
Scheme 36: Synthesis of normuscopyridine (223) by the RCM strategy. Reagents and condition: (i) Mg, THF, hexen...
Scheme 37: Synthesis of muscopyridine (73) via RCM. Reagents and conditions: (i) 225, NaH, THF, 0 °C to rt, 1....
Scheme 38: Synthesis of muscopyridine (73) via RCM strategy. Reagents and conditions: (i) NaH, n-BuLi, 5-bromo...
Scheme 39: Synthesis of pyridinophane derivatives 223 and 245. Reagents and conditions: (i) PhSO2Na, TBAB, CH3...
Scheme 40: Synthesis of metacyclophane derivatives 251 and 253. Reagents and conditions: (i) 240, NaH, THF, rt...
Scheme 41: Synthesis of normuscopyridine and its higher analogues. Reagents and conditions: (i) alkenyl bromid...
Scheme 42: Synthesis of fluorinated ferrocenophane 263 via a [2 + 2] cycloaddition. Reagents and conditions: (...
Scheme 43: Synthesis of [2.n]metacyclophanes 270 via a [2 + 2] cycloaddition. Reagents and conditions: (i) Ac2...
Scheme 44: Synthesis of metacyclophane 273 by a [2 + 2 + 2] co-trimerization. Reagents and conditions: (i) [Rh...
Scheme 45: Synthesis of paracyclophane 276 via a [2 + 2 + 2] cycloaddition reaction. Reagents and conditions: ...
Scheme 46: Synthesis of cyclophane 278 via a [2 + 2 + 2] cycloaddition reaction. Reagents and conditions: (i) ...
Scheme 47: Synthesis of cyclophane 280 via a [2 + 2 + 2] cycloaddition. Reagents and conditions: (i) [(Rh(cod)(...
Scheme 48: Synthesis of taxane framework by a [2 + 2 + 2] cycloaddition. Reagents and conditions: (i) Cp(CO)2 ...
Scheme 49: Synthesis of cyclophane 284 and 285 via a [2 + 2 + 2] cycloaddition reaction. Reagents and conditio...
Scheme 50: Synthesis of pyridinophanes 293a,b and 294a,b via a [2 + 2 + 2] cycloaddition. Reagents and conditi...
Scheme 51: Synthesis of pyridinophanes 296 and 297 via a [2 + 2 + 2] cycloaddition. Reagents and conditions: (...
Scheme 52: Synthesis of triazolophane by a 1,3-dipolar cycloaddition. Reagents and conditions: (i) propargyl b...
Scheme 53: Synthesis of glycotriazolophane 309 by a click reaction. Reagents and conditions: (i) LiOH, H2O, Me...
Figure 11: Cyclophanes 310 and 311 prepared via click chemistry.
Scheme 54: Synthesis of cyclophane via the Dötz benzannulation. Reagents and conditions: (i) THF, 100 °C, 12 h...
Scheme 55: Synthesis of [6,6]metacyclophane by a Dötz benzannulation. Reagents and conditions: (i) THF, 100 °C...
Scheme 56: Synthesis of cyclophanes by a Dötz benzannulation. Reagents and conditions: (i) THF, 65 °C, 3 h; (i...
Scheme 57: Synthesis of muscopyridine (73) via an intramolecular DA reaction of ketene. Reagents and condition...
Scheme 58: Synthesis of bis[10]paracyclophane 336 via Diels–Alder reaction. Reagents and conditions: (i) DMAD,...
Scheme 59: Synthesis of [8]paracyclophane via DA reaction. Reagents and conditions: (i) maleic anhydride, 3–5 ...
Scheme 60: Biomimetic synthesis of (−)-longithorone A. Reagents and conditions: (i) Me2AlCl, CH2Cl2, −20 °C, 7...
Scheme 61: Synthesis of sporolide B (349) via a [4 + 2] cycloaddition reaction. Reagents and conditions: (i) P...
Scheme 62: Synthesis of the framework of (+)-cavicularin (352) via a [4 + 2] cycloaddition. Reagents and condi...
Scheme 63: Synthesis of oxazole-containing cyclophane 354 via Beckmann rearrangement. Reagents and conditions:...
Scheme 64: Synthesis of cyclophanes 360a–c via benzidine rearrangement. Reagents and conditions: (i) 356a–d, K2...
Scheme 65: Synthesis of cyclophanes 365a–c via benzidine rearrangement. Reagents and conditions: (i) BocNHNH2,...
Scheme 66: Synthesis of metacyclophane 367 via Ciamician–Dennstedt rearrangement. Reagents and conditions: (i)...
Scheme 67: Synthesis of cyclophane by tandem Claisen rearrangement and RCM as key steps. Reagents and conditio...
Scheme 68: Synthesis of cyclophane derivative 380. Reagents and conditions: (i) K2CO3, CH3CN, allyl bromide, r...
Scheme 69: Synthesis of metacyclophane via Cope rearrangement. Reagents and conditions: (i) MeOH, NaBH4, rt, 1...
Scheme 70: Synthesis of cyclopropanophane via Favorskii rearrangement. Reagents and conditions: (i) Br2, CH2Cl2...
Scheme 71: Cyclophane 389 synthesis via photo-Fries rearrangement. Reagents and conditions: (i) DMAP, EDCl/CHCl...
Scheme 72: Synthesis of normuscopyridine (223) via Schmidt rearrangement. Reagents and conditions: (i) ethyl s...
Scheme 73: Synthesis of crownophanes by tandem Claisen rearrangement. Reagents and conditions: (i) diamine, Et3...
Scheme 74: Attempted synthesis of cyclophanes via tandem Claisen rearrangement and RCM. Reagents and condition...
Scheme 75: Synthesis of muscopyridine via alkylation with 2,6-dimethylpyridine anion. Reagents and conditions:...
Scheme 76: Synthesis of cyclophane via Friedel–Craft acylation. Reagents and conditions: (i) CS2, AlCl3, 7 d, ...
Scheme 77: Pyridinophane 418 synthesis via Friedel–Craft acylation. Reagents and conditions: (i) 416, AlCl3, CH...
Scheme 78: Cyclophane synthesis involving the Kotha–Schölkopf reagent 421. Reagents and conditions: (i) NBS, A...
Scheme 79: Cyclophane synthesis involving the Kotha–Schölkopf reagent 421. Reagents and conditions: (i) BEMP, ...
Scheme 80: Cyclophane synthesis by coupling with TosMIC. Reagents and conditions: (i) (a) ClCH2OCH3, TiCl4, CS2...
Scheme 81: Synthesis of diaza[32]cyclophanes and triaza[33]cyclophanes. Reagents and conditions: (i) DMF, NaH,...
Scheme 82: Synthesis of cyclophane 439 via acyloin condensation. Reagents and conditions: (i) Na, xylene, 75%;...
Scheme 83: Synthesis of multibridged binuclear cyclophane 442 by aldol condensation. Reagents and conditions: ...
Scheme 84: Synthesis of various macrolactones. Reagents and conditions: (i) iPr2EtN, DMF, 77–83%; (ii) TBDMSCl...
Scheme 85: Synthesis of muscone and muscopyridine via Yamaguchi esterification. Reagents and conditions: (i) 4...
Scheme 86: Synthesis of [5]metacyclophane via a double elimination reaction. Reagents and conditions: (i) LiBr...
Figure 12: Cyclophanes 466–472 synthesized via Hofmann elimination.
Scheme 87: Synthesis of cryptophane via Baylis–Hillman reaction. Reagents and conditions: (i) methyl acrylate,...
Scheme 88: Synthesis of cyclophane 479 via double Chichibabin reaction. Reagents and conditions: (i) excess 478...
Scheme 89: Synthesis of cyclophane 483 via double Chichibabin reaction. Reagents and conditions: (i) 481, OH−;...
Scheme 90: Synthesis of cyclopeptide via an intramolecular SNAr reaction. Reagents and conditions: (i) TBAF, T...
Scheme 91: Synthesis of muscopyridine (73) via C-zip ring enlargement reaction. Reagents and conditions: (i) H...
Figure 13: Mechanism of the formation of compound 494.
Scheme 92: Synthesis of indolophanetetraynes 501a,b using the Nicholas reaction as a key step. Reagents and co...
Scheme 93: Synthesis of cyclophane via radical cyclization. Reagents and conditions: (i) cyclododecanone, phen...
Scheme 94: Synthesis of (−)-cylindrocyclophanes A (156) and (−)-cylindrocyclophanes F (155). Reagents and cond...
Scheme 95: Cyclophane synthesis via Wittig reaction. Reagents and conditions: (i) LiOEt (2.1 equiv), THF, −78 ...
Figure 14: Representative examples of cyclophanes synthesized via Wittig reaction.
Scheme 96: Synthesis of the [6]paracyclophane via isomerization of Dewar benzene. Reagents and conditions: (i)...
Beilstein J. Org. Chem. 2015, 11, 493–498, doi:10.3762/bjoc.11.55
Graphical Abstract
Scheme 1: Formation of the 2-aminobenzimidazole moiety.
Scheme 2: Synthesis of tris(2-aminobenzimidazole). Conditions: a: Boc-ON, THF, 0 °C to rt, 46 h, 45%; b: 1) 1...
Scheme 3: Synthesis of PNA conjugates. Conditions: a: 1) 9, HOBt, DIC, DMF, rt, 24 h; 2) piperidine, DMF, rt,...
Figure 1: Sequences of PNA conjugates 10–14 and oligonucleotides 15–20. Lysines are attached to the C-terminu...
Figure 2: Cleavage of RNA by their corresponding PNA conjugates (150 nM substrate, 750 nM conjugate, 50 mM Tr...
Figure 3: Substrate specificity of conjugates 12 and 14 (150 nM substrate, 750 nM conjugate, 50 mM Tris-HCl, ...
Figure 4: Cleavage of RNA substrates 15, 16, and 17 by their matching conjugates as a function of conjugate c...
Figure 5: Cleavage kinetics of 15 in the presence and absence of conjugate 12. Conditions: 150 nM substrate, ...
Beilstein J. Org. Chem. 2015, 11, 92–146, doi:10.3762/bjoc.11.13
Graphical Abstract
Scheme 1: Cross-dehydrogenative coupling.
Scheme 2: Cross-dehydrogenative C–O coupling.
Scheme 3: Regioselective ortho-acetoxylation of meta-substituted arylpyridines and N-arylamides.
Scheme 4: ortho-Acyloxylation and alkoxylation of arenes directed by pyrimidine, benzoxazole, benzimidazole a...
Scheme 5: Cu(OAc)2/AgOTf/O2 oxidative system in the ortho-alkoxylation of arenes.
Scheme 6: Pd(OAc)2/persulfate oxidative system in the ortho-alkoxylation and acetoxylation of arenes with nit...
Scheme 7: ortho-Acetoxylation and methoxylation of O-methyl aryl oximes, N-phenylpyrrolidin-2-one, and (3-ben...
Scheme 8: Ruthenium-catalyzed ortho-acyloxylation of acetanilides.
Scheme 9: Acetoxylation and alkoxylation of arenes with amide directing group using Pd(OAc)2/PhI(OAc)2 oxidat...
Scheme 10: Alkoxylation of azoarenes, 2-aryloxypyridines, picolinamides, and N-(1-methyl-1-(pyridin-2-yl)ethyl...
Scheme 11: Acetoxylation of compounds containing picolinamide and quinoline-8-amine moieties using the Pd(OAc)2...
Scheme 12: (CuOH)2CO3 catalyzed oxidative ortho-etherification using air as oxidant.
Scheme 13: Copper-catalyzed aerobic alkoxylation and aryloxylation of arenes containing pyridine-N-oxide moiet...
Scheme 14: Cobalt-catalyzed aerobic alkoxylation of arenes and alkenes containing pyridine N-oxide moiety.
Scheme 15: Non-symmetric double-fold C–H ortho-acyloxylation.
Scheme 16: N-nitroso directed ortho-alkoxylation of arenes.
Scheme 17: Selective alkoxylation and acetoxylation of alkyl groups.
Scheme 18: Acetoxylation of 2-alkylpyridines and related compounds.
Scheme 19: Acyloxylation and alkoxylation of alkyl fragments of substrates containing amide or sulfoximine dir...
Scheme 20: Palladium-catalyzed double sp3 C–H alkoxylation of N-(quinolin-8-yl)amides for the synthesis of sym...
Scheme 21: Copper-catalyzed acyloxylation of methyl groups of N-(quinolin-8-yl)amides.
Scheme 22: One-pot acylation and sp3 C–H acetoxylation of oximes.
Scheme 23: Possible mechanism of oxidative esterification catalyzed by N-heterocyclic nucleophilic carbene.
Scheme 24: Oxidative esterification employing stoichiometric amounts of aldehydes and alcohols.
Scheme 25: Selective oxidative coupling of aldehydes with alcohols in the presence of amines.
Scheme 26: Iodine mediated oxidative esterification.
Scheme 27: Oxidative C–O coupling of benzyl alcohols with methylarenes under the action of Bu4NI/t-BuOOH syste...
Scheme 28: Oxidative coupling of methyl- and ethylarenes with aromatic aldehydes under the action of Bu4NI/t-B...
Scheme 29: Cross-dehydrogenative C–O coupling of aldehydes with t-BuOOH in the presence of Bu4NI.
Scheme 30: Bu4NI-catalyzed α-acyloxylation reaction of ethers and ketones with aldehydes and t-BuOOH.
Scheme 31: Oxidative coupling of aldehydes with N-hydroxyimides and hexafluoroisopropanol.
Scheme 32: Oxidative coupling of alcohols with N-hydroxyimides.
Scheme 33: Oxidative coupling of aldehydes and primary alcohols with N-hydroxyimides using (diacetoxyiodo)benz...
Scheme 34: Proposed mechanism of the oxidative coupling of aldehydes and N-hydroxysuccinimide under action of ...
Scheme 35: Oxidative coupling of aldehydes with pivalic acid (172).
Scheme 36: Oxidative C–O coupling of aldehydes with alkylarenes using the Cu(OAc)2/t-BuOOH system.
Scheme 37: Copper-catalyzed acyloxylation of C(sp3)-H bond adjacent to oxygen in ethers using benzyl alcohols.
Scheme 38: Oxidative C–O coupling of aromatic aldehydes with cycloalkanes.
Scheme 39: Ruthenium catalyzed cross-dehydrogenative coupling of primary and secondary alcohols.
Scheme 40: Cross-dehydrogenative C–O coupling reactions of β-dicarbonyl compounds with sulfonic acids, acetic ...
Scheme 41: Acyloxylation of ketones, aldehydes and β-dicarbonyl compounds using carboxylic acids and Bu4NI/t-B...
Scheme 42: Acyloxylation of ketones using Bu4NI/t-BuOOH system.
Scheme 43: Cross-dehydrogenative C–O coupling of β-dicarbonyl compounds and their heteroanalogues with N-hydro...
Scheme 44: Cross-dehydrogenative C–O coupling of β-dicarbonyl compounds and their heteroanalogues with t-BuOOH....
Scheme 45: Oxidative C–O coupling of 2,6-dialkylphenyl-β-keto esters and thioesters with tert-butyl hydroxycar...
Scheme 46: α’-Acyloxylation of α,β-unsaturated ketones using KMnO4.
Scheme 47: Possible mechanisms of the acetoxylation at the allylic position of alkenes by Pd(OAc)2.
Scheme 48: Products of the oxidation of terminal alkenes by Pd(II)/AcOH/oxidant system.
Scheme 49: Acyloxylation of terminal alkenes with carboxylic acids.
Scheme 50: Synthesis of linear E-allyl esters by cross-dehydrogenative coupling of terminal alkenes wih carbox...
Scheme 51: Pd(OAc)2-catalyzed acetoxylation of Z-vinyl(triethylsilanes).
Scheme 52: α’-Acetoxylation of α-acetoxyalkenes with copper(II) chloride in acetic acid.
Scheme 53: Oxidative acyloxylation at the allylic position of alkenes and at the benzylic position of alkylare...
Scheme 54: Copper-catalyzed alkoxylation of methylheterocyclic compounds using di-tert-butylperoxide as oxidan...
Scheme 55: Oxidative C–O coupling of methylarenes with β-dicarbonyl compounds or phenols.
Scheme 56: Copper-catalyzed esterification of methylbenzenes with cyclic ethers and cycloalkanes.
Scheme 57: Oxidative C–O coupling of carboxylic acids with toluene catalyzed by Pd(OAc)2.
Scheme 58: Oxidative acyloxylation at the allylic position of alkenes with carboxylic acids using the Bu4NI/t-...
Scheme 59: Cross-dehydrogenative C–O coupling of carboxylic acids with alkylarenes using the Bu4NI/t-BuOOH sys...
Scheme 60: Oxidative C–O cross-coupling of methylarenes with ethyl or isopropylarenes.
Scheme 61: Phosphorylation of benzyl C–H bonds using the Bu4NI/t-BuOOH oxidative system.
Scheme 62: Selective C–H acetoxylation of 2,3-disubstituted indoles.
Scheme 63: Acetoxylation of benzylic position of alkylarenes using DDQ as oxidant.
Scheme 64: C–H acyloxylation of diarylmethanes, 3-phenyl-2-propen-1-yl acetate and dimethoxyarene using DDQ.
Scheme 65: Cross-dehydrogenative C–O coupling of 1,3-diarylpropylenes and 1,3-diarylpropynes with alcohols.
Scheme 66: One-pot azidation and C–H acyloxylation of 3-chloro-1-arylpropynes.
Scheme 67: Cross-dehydrogenative C–O coupling of 1,3-diarylpropylenes, (E)-1-phenyl-2-isopropylethylene and is...
Scheme 68: Cross-dehydrogenative C–O coupling of alkylarenes and related compounds with N-hydroxyphthalimide.
Scheme 69: Acetoxylation at the benzylic position of alkylarenes mediated by N-hydroxyphthalimide.
Scheme 70: C–O coupling of methylarenes with aromatic carboxylic acids employing the NaBrO3/NaHSO3 system.
Scheme 71: tert-Butyl peroxidation of allyl, propargyl and benzyl ethers catalyzed by Fe(acac)3.
Scheme 72: Cross-dehydrogenative C–O coupling of ethers with carboxylic acids mediated by Bu4NI/t-BuOOH system....
Scheme 73: Oxidative acyloxylation of dimethylamides and dioxane with 2-aryl-2-oxoacetic acids accompanied by ...
Scheme 74: tert-Butyl peroxidation of N-benzylamides and N-allylbenzamide using the Bu4NI/t-BuOOH system.
Scheme 75: Cross-dehydrogenative C–O coupling of aromatic carboxylic acids with ethers using Fe(acac)3 as cata...
Scheme 76: Cross-dehydrogenative C–O coupling of cyclic ethers with 2-hydroxybenzaldehydes using iron carbonyl...
Scheme 77: Cross-dehydrogenative C–O coupling of ethers with β-dicarbonyl compounds and phenols using copper c...
Scheme 78: Cross-dehydrogenative C–O coupling of 2-hydroxybenzaldehyde with dioxane catalyzed by Cu2(BPDC)2(BP...
Scheme 79: Ruthenium chloride-catalyzed acyloxylation of β-lactams.
Scheme 80: Ruthenium-catalyzed tert-butyl peroxydation amides and acetoxylation of β-lactams.
Scheme 81: PhI(OAc)2-mediated α,β-diacetoxylation of tertiary amines.
Scheme 82: Electrochemical oxidative methoxylation of tertiary amines.
Scheme 83: Cross-dehydrogenative C–O coupling of ketene dithioacetals with carboxylic acids in the presence of...
Scheme 84: Cross-dehydrogenative C–O coupling of enamides with carboxylic acids using iodosobenzene as oxidant....
Scheme 85: Oxidative alkoxylation, acetoxylation, and tosyloxylation of acylanilides using PhI(O(O)CCF3)2 in t...
Scheme 86: Proposed mechanism of the oxidative C–O coupling of actetanilide with O-nucleophiles in the presenc...
Scheme 87: Three-component coupling of aldehydes, anilines and alcohols involving oxidative intermolecular C–O...
Scheme 88: Oxidative coupling of phenols with alcohols.
Scheme 89: 2-Acyloxylation of quinoline N-oxides with arylaldehydes in the presence of the CuOTf/t-BuOOH syste...
Scheme 90: Cross-dehydrogenative C–O coupling of azoles with primary alcohols.
Scheme 91: Oxidation of dipyrroles to dipyrrins and subsequent oxidative alkoxylation in the presence of Na3Co...
Scheme 92: Oxidative dehydrogenative carboxylation of alkanes and cycloalkanes to allylic esters.
Scheme 93: Pd-catalyzed acetoxylation of benzene.
Beilstein J. Org. Chem. 2014, 10, 3031–3037, doi:10.3762/bjoc.10.321
Graphical Abstract
Scheme 1: Synthesis of polycyclic fused triazoles.
Scheme 2: Synthesis of fused triazole 4a using phenylacetylene.
Scheme 3: Synthesis of 1a, 1b and 1c.
Scheme 4: Synthesis of fused polycyclic triazole analogs 4.
Figure 1: ORTEP diagram of 4f (CCDC 979471).
Scheme 5: Proposed mechanism for the formation of 4.
Beilstein J. Org. Chem. 2014, 10, 2461–2469, doi:10.3762/bjoc.10.257
Graphical Abstract
Scheme 1: Schematic description of self-assembly of γ-CDs with BrPPO-PEO-PPOBr and PHEMA-PPO-PEO-PPO-PHEMA in...
Scheme 2: Synthetic pathway of a pentablock copolymer.
Figure 1: Photographs of the turbidity evolution in PEP18CD (1) and PEP26MnCDs (2) (PEP26M9CD (left), PEP26H1...
Figure 2: WXRD spectra of γ-CD, PHEMA, PEP26M, PEP18CD and PEP26MnCDs.
Figure 3: 1H NMR spectra of PEP26M9CD (A), PEP26M18CD (B) and PEP26M27CD (C).
Figure 4: DSC curves of PHEMA, PEP26M, PEP26MnCDs, BrPEPBr and PEP18CD.
Figure 5: TGA curves of γ-CD, PEP26M, PEP26MnCDs, BrPEPBr and PEP18CD.
Figure 6: FTIR spectra of γ-CD, PEP26M, PEP18CD and PEP26MnCDs.
Figure 7: 13C CP/MAS NMR spectra of PEP26M, γ-CD and PEP26M27CD.
Beilstein J. Org. Chem. 2014, 10, 2077–2086, doi:10.3762/bjoc.10.216
Graphical Abstract
Figure 1: Examples of naturally occurring tetrahydrofurans.
Scheme 1: PdCl2/CuCl2-catalysed bicyclisation of unsaturated polyols [22].
Figure 2: Structures of C5-alkenitols.
Scheme 2: Synthesis of alkenols 20-23 and 30. Reagents and conditions: a) lit. [31] (COCl)2, DMSO, Et3N, CH2Cl2, ...
Scheme 3: Synthesis of alkenols 24–26 and 28. Reagents and conditions: a) lit. [32] DIBAL-H, CH2Cl2; b) TBDPSCl, ...
Scheme 4: Synthesis of substrates 33–35, 37. Reagents and conditions: a) lit. [33] L-proline (0.25 equiv), 2-nitr...
Scheme 5: Synthesis of rac-42. Reagents and conditions: a) MCPBA, CH2Cl2, 0 °C to rt, 45 min; b) TFA, H2O, TH...
Figure 3: Structure of 43.
Scheme 6: Suggested mechanisms for PdII–Pd0, PdII–PdIV and PdII-chloro/cyclisation of unsaturated polyols.
Figure 4: An ORTEP [44] view of crystal and molecular structure of 53.
Scheme 7: Bicyclisation of 55–58. Reagents and conditions: a) NaH, DMF, 50 °C, 2 h; b) I2, CH3CN, rt, overnig...
Beilstein J. Org. Chem. 2014, 10, 1220–1227, doi:10.3762/bjoc.10.120
Graphical Abstract
Scheme 1: Synthesis of alkoxy dibenzooxaphosphorin oxides by C(sp2)–H activation/C–O formation.
Scheme 2: Preparation of 2-(aryl)arylphosphonic acid monoethyl esters.
Scheme 3: A variety of organic acids and monoprotected amino acids as ligands.
Scheme 4: Cyclization of 2-arylphenylphosphonic acid monoethyl esters.
Scheme 5: Cyclization of 2-(aryl)arylphosphonic acid monoethyl esters.
Scheme 6: Preparation of 1a-[D5].
Scheme 7: Preparation of 1a-[D1].
Scheme 8: Studies with isotopically labelled compounds.
Scheme 9: A plausible mechanism.
Beilstein J. Org. Chem. 2014, 10, 1166–1196, doi:10.3762/bjoc.10.117
Graphical Abstract
Scheme 1: Pioneer works of Atherton, Openshaw and Todd reporting on the synthesis of phosphoramidate starting...
Scheme 2: Mechanisms 1 (i) and 2 (ii) suggested by Atherton and Todd in 1945; adapted from [1].
Scheme 3: Two reaction pathways (i and ii) to produce chlorophosphate 2. Charge-transfer complex observed whe...
Scheme 4: Mechanism of the Atherton–Todd reaction with dimethylphosphite according to Roundhill et al. (adapt...
Scheme 5: Synthesis of dialkyl phosphate from dialkyl phosphite (i) and identification of chloro- and bromoph...
Scheme 6: Synthesis of chiral phosphoramidate with trichloromethylphosphonate as the suggested intermediate (...
Scheme 7: Selection of results that address the question of the stereochemistry of the AT reaction (adapted f...
Scheme 8: Synthesis of phenoxy spirophosphorane by the AT reaction (adapted from [34]).
Scheme 9: Suggested mechanism of the Atherton–Todd reaction, (i) and (ii) formation of chlorophosphate with a...
Scheme 10: AT reaction in biphasic conditions (adapted from [38]).
Scheme 11: AT reaction with iodoform as halide source (adapted from [37]).
Scheme 12: AT reaction with phenol at low temperature in the presence of DMAP (adapted from [40]).
Scheme 13: Synthesis of a triphosphate by the AT reaction starting with the preparation of chlorophosphate (ad...
Scheme 14: AT reaction with sulfonamide (adapted from [42]).
Scheme 15: Synthesis of a styrylphosphoramidate starting from the corresponding aniline (adapted from [43]).
Scheme 16: Use of hydrazine as nucleophile in AT reactions (adapted from [48]).
Scheme 17: AT reaction with phenol as a nucleophilic species; synthesis of dioleyl phosphate-substituted couma...
Scheme 18: Synthesis of β-alkynyl-enolphosphate from allenylketone with AT reaction (adapted from [58]).
Scheme 19: Synthesis of pseudohalide phosphate by using AT reaction (adapted from [67]).
Scheme 20: AT reaction with hydrospirophosphorane with insertion of CO2 in the product (adapted from [69]).
Scheme 21: AT reaction with diaryl phosphite (adapted from [70]).
Scheme 22: AT reaction with O-alkyl phosphonite (adapted from [71]).
Scheme 23: Use of phosphinous acid in AT reactions (adapted from [72]).
Scheme 24: AT reaction with secondary phosphinethiooxide (adapted from [76]).
Scheme 25: Use of H-phosphonothioate in the AT reaction (adapted from [78]).
Scheme 26: AT-like reaction with CuI as catalyst and without halide source (adapted from [80]).
Scheme 27: Reduction of phenols after activation as phosphate derivatives (adapted from [81] i ; [82], ii; and [83], iii).
Scheme 28: Synthesis of medium and large-sized nitrogen-containing heterocycles (adapted from [85]).
Scheme 29: Synthesis of arylstannane from aryl phosphate prepared by an AT reaction (adapted from [86]).
Scheme 30: Synthesis and use of aryl dialkyl phosphate for the synthesis of biaryl derivatives (adapted from [89])....
Scheme 31: Synthesis of aryl dialkyl phosphate by an AT reaction from phenol and subsequent rearrangement yiel...
Scheme 32: Selected chiral phosphoramidates used as organocatalyst; i) chiral phosphoramidate used in the pion...
Scheme 33: Determination of ee of H-phosphinate by the application of the AT reaction with a chiral amine (ada...
Scheme 34: Chemical structure of selected flame retardants synthesized by AT reactions; (BDE: polybrominated d...
Scheme 35: Transformation of DOPO (i) and synthesis of polyphosphonate (ii) by the AT reaction (adapted from [117] ...
Scheme 36: Synthesis of lipophosphite (bisoleyl phosphite) and cationic lipophosphoramidate with an AT reactio...
Scheme 37: Use of AT reactions to produce cationic lipids characterized by a trimethylphosphonium, trimethylar...
Scheme 38: Cationic lipid synthesized by the AT reaction illustrating the variation of the structure of the li...
Scheme 39: Helper lipids for nucleic acid delivery synthesized with the AT reaction (adapted from [130]).
Scheme 40: AT reaction used to produce red/ox-sensitive cationic lipids (adapted from [135]).
Scheme 41: Alkyne and azide-functionalized phosphoramidate synthesized by AT reactions,(i); illustration of so...
Scheme 42: Cationic lipids exhibiting bactericidal action – arrows indicate the bond formed by the AT reaction...
Scheme 43: β-Cyclodextrin-based lipophosphoramidates (adapted from [138]).
Scheme 44: Polyphosphate functionalized by an AT reaction (adapted from [139]).
Scheme 45: Synthesis of zwitterionic phosphocholine-bound chitosan (adapted from [142]).
Scheme 46: Synthesis of AZT-based prodrug via an AT reaction (adapted from [143]).
Beilstein J. Org. Chem. 2014, 10, 910–920, doi:10.3762/bjoc.10.89
Graphical Abstract
Figure 1: Shape-persistent macrocycles with different peripheral side groups and intraannular templates.
Scheme 1: Synthesis of macrocycle 1a with an intraannular undecanedioxy bridge. a: Pd(PPh3)2Cl2, PPh3, CuI, p...
Figure 2: GPC elugrams of the crude product of the cyclization reaction of 1a (—) and 1d (- - -), respectivel...
Scheme 2: Synthesis of the template free macrocycle 1d. a: Pd(PPh3)2Cl2, PPh3, CuI, piperidine, 98%; b: TBAF,...
Figure 3: (a) Melting points (Tm) and clearing points (Tcl) of macrocycles with different interior. [a]First ...
Figure 4: POM images of (a) 1a (20×, 133 °C, upon cooling); (b) 1d (20×, 84 °C, upon heating).
Figure 5: 2D X-ray patterns for 1d: (a) isotropic liquid at 160 °C, (b) partially aligned liquid crystalline ...
Figure 6: 2D X-ray patterns for 1a: (a) isotropic liquid at 150 °C, (b) columnar mesophase at 100 °C, surface...
Figure 7: Model of the molecular packing in the columnar mesophase of 1a: (a) 2D packing scheme for the colum...
Beilstein J. Org. Chem. 2014, 10, 692–700, doi:10.3762/bjoc.10.62
Graphical Abstract
Scheme 1: Preparation of maleimide dipolarophiles 4a–c.
Scheme 2: Preparation of 1,3-dipole precursors 9a–d.
Figure 1: Bi-/tridentate ligands used for the optimization of the reaction conditions.
Figure 2: ORTEP diagram showing the molecular structure of 10a at 30% probability level.
Scheme 3: Plausible mechanistic pathway for the synthesis of pyrrolo[3′,4′:3,4]pyrrolo[1,2-a]furoquinolines.
Scheme 4: Synthesis of pyrrolo[3′,4′:3,4]pyrrolo[1,2-a]furoquinoline analogues under the optimized protocol.
Scheme 5: Construction of pyrrolo[3′,4′:3,4]pyrrolo[1,2-a]phenanthrolines 14a–c and of pyrrolo[1,2-a]phenanth...
Figure 3: ORTEP diagram showing the molecular structure of 14e at 30% probability level.
Beilstein J. Org. Chem. 2014, 10, 481–513, doi:10.3762/bjoc.10.46
Graphical Abstract
Scheme 1: General reaction mechanism for Ag(I)-catalyzed A3-coupling reactions.
Scheme 2: A3-coupling reaction catalyzed by polystyrene-supported NHC–silver halides.
Figure 1: Various NHC–Ag(I) complexes used as catalysts for A3-coupling.
Scheme 3: Proposed reaction mechanism for NHC–AgCl catalyzed A3-coupling reactions.
Scheme 4: Liu’s synthesis of pyrrole-2-carboxaldehydes 4.
Scheme 5: Proposed reaction mechanism for Liu’s synthesis of pyrrole-2-carboxaldehydes 4.
Scheme 6: Gold-catalyzed synthesis of propargylamines 1.
Scheme 7: A3-coupling catalyzed by phosphinamidic Au(III) metallacycle 6.
Scheme 8: Gold-catalyzed KA2-coupling.
Scheme 9: A3-coupling applied to aldehyde-containing oligosaccharides 8.
Scheme 10: A3-MCR for the preparation of propargylamine-substituted indoles 9.
Scheme 11: A3-coupling interceded synthesis of furans 12.
Scheme 12: A3/KA2-coupling mediated synthesis of functionalized dihydropyrazoles 13 and polycyclic dihydropyra...
Scheme 13: Au(I)-catalyzed entry to cyclic carbamimidates 17 via an A3-coupling-type approach.
Scheme 14: Proposed reaction mechanism for the Au(I)-catalyzed synthesis of cyclic carbamimidates 17.
Figure 2: Chiral trans-1-diphenylphosphino-2-aminocyclohexane–Au(I) complex 20.
Scheme 15: A3-coupling-type synthesis of oxazoles 21 catalyzed by Au(III)–salen complex.
Scheme 16: Proposed reaction mechanism for the synthesis of oxazoles 21.
Scheme 17: Synthesis of propargyl ethyl ethers 24 by an A3-coupling-type reaction.
Scheme 18: General mechanism of Ag(I)-catalyzed MCRs of 2-alkynylbenzaldehydes, amines and nucleophiles.
Scheme 19: General synthetic pathway to 1,3-disubstituted-1,2-dihydroisoquinolines.
Scheme 20: Synthesis of 1,3-disubstituted-1,2-dihydroisoquinolines 29.
Scheme 21: Synthesis of 1,3-disubstituted-1,2-dihydroisoquinolines 35 and 36.
Scheme 22: Rh(II)/Ag(I) co-catalyzed synthesis of 1,3-disubstituted-1,2-dihydroisoquinolines 40.
Scheme 23: General synthetic pathway to 2-amino-1,2-dihydroquinolines.
Scheme 24: Synthesis of 2-amino-1,2-dihydroquinolines 47.
Scheme 25: Synthesis of tricyclic H-pyrazolo[5,1-a]isoquinoline 48.
Scheme 26: Synthesis of tricyclic H-pyrazolo[5,1-a]isoquinolines 48.
Scheme 27: Cu(II)/Ag(I) catalyzed synthesis of H-pyrazolo[5,1-a]isoquinolines 48.
Scheme 28: Synthesis of 2-aminopyrazolo[5,1-a]isoquinolines 53.
Scheme 29: Synthesis of 1-(isoquinolin-1-yl)guanidines 55.
Scheme 30: Ag(I)/Cu(I) catalyzed synthesis of 2-amino-H-pyrazolo[5,1-a]isoquinolines 58.
Scheme 31: Ag(I)/Ni(II) co-catalyzed synthesis of 3,4-dihydro-1H-pyridazino[6,1-a]isoquinoline-1,1-dicarboxyla...
Scheme 32: Ag(I) promoted activation of the α-carbon atom of the isocyanide group.
Scheme 33: Synthesis of dihydroimidazoles 65.
Scheme 34: Synthesis of oxazoles 68.
Scheme 35: Stereoselective synthesis of chiral butenolides 71.
Scheme 36: Proposed reaction mechanism for the synthesis of butenolides 71.
Scheme 37: Stereoselective three-component approach to pirrolidines 77 by means of a chiral auxiliary.
Scheme 38: Stereoselective three-component approach to pyrrolidines 81 and 82 by means of a chiral catalyst.
Scheme 39: Synthesis of substituted five-membered carbocyles 86.
Scheme 40: Synthesis of regioisomeric arylnaphthalene lactones.
Scheme 41: Enantioselective synthesis of spiroacetals 96 by Fañanás and Rodríguez [105].
Scheme 42: Enantioselective synthesis of spiroacetals 101 by Gong [106].
Scheme 43: Synthesis of polyfunctionalized fused bicyclic ketals 103 and bridged tricyclic ketals 104.
Scheme 44: Proposed reaction mechanism for the synthesis of ketals 103 and 104.
Scheme 45: Synthesis of β-alkoxyketones 108.
Scheme 46: Synthesis of N-methyl-1,4-dihydropyridines 112.
Scheme 47: Synthesis of tetrahydrocarbazoles 115–117.
Scheme 48: Plausible reaction mechanism for the synthesis of tetrahydrocarbazoles 115–117.
Scheme 49: Carboamination, carboalkoxylation and carbolactonization of terminal alkenes.
Scheme 50: Oxyarylation of alkenes with arylboronic acids and Selectfluor as reoxidant.
Scheme 51: Proposed reaction mechanism for oxyarylation of alkenes.
Scheme 52: Oxyarylation of alkenes with arylsilanes and Selectfluor as reoxidant.
Scheme 53: Oxyarylation of alkenes with arylsilanes and IBA as reoxidant.
Beilstein J. Org. Chem. 2014, 10, 449–458, doi:10.3762/bjoc.10.42
Graphical Abstract
Scheme 1: Cycloisomerization/fluorination of functionalized indoles.
Scheme 2: Synthesis of hemiaminal derivatives.
Scheme 3: Reaction on n-hexyl-substituted derivative 1i.
Scheme 4: Mechanism rationale for the formation of 7.
Beilstein J. Org. Chem. 2014, 10, 127–133, doi:10.3762/bjoc.10.9
Graphical Abstract
Figure 1: Bisamides as building blocks for flavaglins.
Figure 2: (+)-Grandiamide D, gigantamide A and dasyclamide.
Scheme 1: Retrosynthetic analysis: A unified synthetic approach for the synthesis of grandiamide D, dasyclami...
Scheme 2: Preparation of N-(4-aminobutyl)cinnamamide.
Scheme 3: Synthesis of (±)-grandiamide D.
Scheme 4: Asymmetric synthesis of natural (+)-grandiamide D.
Scheme 5: Various approaches for the synthesis of (E)-N-(4-cinnamamidobutyl)-4-((4-methoxybenzyl)oxy)-2-methy...
Scheme 6: Synthesis of dasyclamide.
Beilstein J. Org. Chem. 2013, 9, 2715–2750, doi:10.3762/bjoc.9.308
Graphical Abstract
Scheme 1: Exemplary 1,3-dipolar cycloaddition of phenylacetylene with phenyl azide [6].
Scheme 2: CuAAC reaction of benzyl azide with (prop-2-yn-1-yloxy)benzene [12].
Scheme 3: Bioconjugation reaction of capsid-bound azide groups with alkynyl-functionalized dye molecules (cow...
Figure 1: Tris(triazolylmethyl)amine ligands for CuAAC applications in bioorganic chemistry: TBTA = tris[(1-b...
Figure 2: Derivatives of 2,2’-bipyridine and 1,10-phenanthroline, commonly used ligands in CuAAC reactions un...
Scheme 4: CuAAC reaction with copper(II) precursor salt and rate-accelerating monodentate phosphoramidite lig...
Scheme 5: Synthesis of 1-(adamant-1-yl)-1H-1,2,3-triazol-4-ylcarbonyl-Phe-Gly-OH by solid-supported Click cat...
Scheme 6: CuAAC reaction with re-usable copper(I)-tren catalyst [129].
Scheme 7: CuAAC test reaction with chlorido[tris(1-benzyl-1H-1,2,3-triazol-4-yl)methanol-κ3N3]copper(I) and a...
Scheme 8: CuAAC model reaction with [Cu2(μ-TBTA-κ4N2,N3,N3’,N3’’)2][BF4]2 [131].
Scheme 9: Application of a (2-aminoarenethiolato)copper(I) complex as homogeneous catalyst for the CuAAC test...
Scheme 10: Application of [CuBr(PPh3)3] as homogeneous catalyst for the CuAAC test reaction of benzyl azide wi...
Figure 3: Phosphinite and phosphonite copper(I) complexes presented by Díez-González [144].
Scheme 11: Effect of additives on the CuAAC test reaction with [(SIMes)CuCl] [149].
Scheme 12: Initiation of the catalytic cycle by formation of the copper acetylide intermediate from [(ICy)2Cu]...
Scheme 13: Early mechanistic proposal by Sharpless [12,42].
Scheme 14: Chemoselective synthesis of a 5-iodo-1,4-disubstituted 1,2,3-triazole [156].
Scheme 15: Mechanistic proposals for the copper-catalyzed azide–iodoalkyne cycloaddition [156].
Scheme 16: 1,3-Dipolar cycloaddition of 3-hexyne catalyzed by [(SIMes)CuBr] [146].
Scheme 17: Mechanistic picture for the cycloaddition of internal alkynes catalyzed by NHC-copper(I) complexes ...
Scheme 18: Catalytic cycle of the CuAAC reaction on the basis of the proposed mechanistic scheme by Fokin and ...
Figure 4: Schematic representation of the single crystal X-ray structures of copper(I) acetylide complexes [Cu...
Figure 5: Acetylide-bridged dicopper complexes with tris(heteroarylmethyl)amine ligand(s) as key intermediate...
Scheme 19: Off-cycle equilibrium between unreactive polymeric copper(I) acetylide species (right) and reactive...
Figure 6: Categories of tris(heteroarylmethyl)amine ligands regarding their binding ability to copper(I) ions ...
Scheme 20: Mechanistic scheme for ligand-accelerated catalysis with tripodal tris(heteroarylmethyl)amine ligan...
Scheme 21: Synthesis of supposed intermediates in the CuAAC’s catalytic cycle [164,187].
Figure 7: Tetranuclear copper acetylide complexes as reported by Weiss (left) [176] and Tasker (middle) [185] and model...
Figure 8: Gibbs free energy diagram for the computed mechanistic pathway of the CuAAC reaction starting from ...
Figure 9: Energy diagram by Ahlquist and Fokin [125].
Scheme 22: Mechanistic proposal for the CuAAC reaction based on DFT calculations by Fokin [125] and our group [186] ([Cu...
Figure 10: ORTEP plot [202,203] of the X-ray powder diffraction crystal structure of (phenylethynyl)copper(I) [(PhC≡CCu)...
Scheme 23: Synthesis of [(PhC≡CCu)2]n as co-product in the Glaser coupling of phenylacetylene in the presence ...
Scheme 24: Mechanistic explanation for the isotopic enrichment in the product triazolide in the presence of th...
Scheme 25: Homogeneous CuAAC catalysis with a bistriazolylidene dicopper complex (0.5 mol %) and comparison wi...
Beilstein J. Org. Chem. 2013, 9, 2586–2614, doi:10.3762/bjoc.9.294
Graphical Abstract
Figure 1: Elementary steps in the gold-catalyzed nucleophilic addition to olefins.
Figure 2: Different approaches for the gold-catalyzed manipulation of inactivated alkenes.
Figure 3: Computed mechanistic cycle for the gold-catalyzed alkoxylation of ethylene with PhOH.
Scheme 1: [Au(I)]-catalyzed addition of phenols and carboxylic acids to alkenes.
Scheme 2: [Au(III)] catalyzed annulations of phenols and naphthols with dienes.
Scheme 3: [Au(III)]-catalyzed addition of aliphatic alcohols to alkenes.
Scheme 4: [Au(III)]-catalyzed carboalkoxylation of alkenes with dimethyl acetals 6.
Figure 4: Postulated mechanism for the [Au(I)]-catalyzed hydroamination of olefins.
Scheme 5: Isolation and reactivity of alkyl gold intermediates in the intramolecular hydroamination of alkene...
Scheme 6: [Au(I)]-catalyzed intermolecular hydroamination of dienes.
Scheme 7: Intramolecular [Au(I)]-catalyzed hydroamination of alkenes with carbamates.
Scheme 8: [Au(I)]-catalyzed inter- as well as intramolecular addition of sulfonamides to isolated alkenes.
Scheme 9: Intramolecular hydroamination of N-alkenylureas catalyzed by gold(I) carbene complex.
Scheme 10: Enantioselective hydroamination of alkenyl ureas with biphenyl tropos ligand and chiral silver phos...
Scheme 11: Intramolecular [Au(I)]-catalyzed hydroamination of N-allyl-N’-aryl ureas. (PNP = pNO2-C6H4, PMP = p...
Scheme 12: [Au(I)]-catalyzed hydroamination of alkenes with ammonium salts.
Scheme 13: Enantioselective [Au(I)]-catalyzed intermolecular hydroamination of alkenes with cyclic ureas.
Scheme 14: Mechanistic proposal for the cooperative [Au(I)]/menthol catalysis for the enantioselective intramo...
Scheme 15: [Au(III)]-catalyzed addition of 1,3-diketones to alkenes.
Scheme 16: [Au(I)]-catalyzed intramolecular addition of β-keto amides to alkenes.
Scheme 17: Intermolecular [Au(I)]-catalyzed addition of indoles to alkenes.
Scheme 18: Intermolecular [Au(III)]-catalyzed hydroarylation of alkenes with benzene derivatives and thiophene....
Scheme 19: a) Intramolecular [Au(III)]-catalyzed hydroarylation of alkenes. b) A SEAr-type mechanism was hypot...
Scheme 20: Intramolecular [Au(I)]-catalyzed hydroalkylation of alkenes with simple ketones.
Scheme 21: Proposed reaction mechanism for the intramolecular [Au(I)]-catalyzed hydroalkylation of alkenes wit...
Scheme 22: Tandem Michael addition/hydroalkylation catalyzed by [Au(I)] and [Ag(I)] salts.
Scheme 23: Intramolecular [Au(I)]-catalyzed tandem migration/[2 + 2] cycloaddition of 1,7-enyne benzoates.
Scheme 24: Intramolecular [Au(I)]-catalyzed cyclopropanation of alkenes.
Scheme 25: Stereospecificity in [Au(I)]-catalyzed hydroalkoxylation of allylic alcohols.
Scheme 26: Mechanistic investigation on the intramolecular [Au(I)]-catalyzed hydroalkoxylation of allylic alco...
Scheme 27: Mechanistic investigation on the intramolecular enantioselective [Au(I)]-catalyzed alkylation of in...
Scheme 28: Synthesis of (+)-isoaltholactone via stereospecific intramolecular [Au(I)]-catalyzed alkoxylation o...
Scheme 29: Intramolecular enantioselective dehydrative amination of allylic alcohols catalyzed by chiral [Au(I...
Scheme 30: Enantioselective intramolecular hydroalkylation of allylic alcohols with aldehydes catalyzed by 20c...
Scheme 31: Gold-catalyzed intramolecular diamination of alkenes.
Scheme 32: Gold-catalyzed aminooxygenation and aminoarylation of alkenes.
Scheme 33: Gold-catalyzed carboamination, carboalkoxylation and carbolactonization of terminal alkenes with ar...
Scheme 34: Synthesis of tricyclic indolines via gold-catalyzed formal [3 + 2] cycloaddition.
Scheme 35: Gold(I) catalyzed aminoarylation of terminal alkenes in presence of Selectfluor [dppm = bis(dipheny...
Scheme 36: Mechanistic investigation on the aminoarylation of terminal alkenes by bimetallic gold(I) catalysis...
Scheme 37: Proposed mechanism for the aminoarylation of alkenes via [Au(I)-Au(I)]/[Au(II)-Au(II)] redox cataly...
Scheme 38: Oxyarylation of terminal olefins via redox gold catalysis.
Scheme 39: a) Intramolecular gold-catalyzed oxidative coupling reactions with aryltrimethylsilanes. b) Oxyaryl...
Scheme 40: Oxy- and amino-arylation of alkenes by [Au(I)]/[Au(III)] photoredox catalysis.
Beilstein J. Org. Chem. 2013, 9, 1397–1406, doi:10.3762/bjoc.9.156
Graphical Abstract
Scheme 1: Comparison of fragmentation reaction pathways of organic radical ions generated under the redox-rea...
Scheme 2: Using rearrangements of radicals and ions to distinguish mechanistic pathways for ET-reactions.
Figure 1: Radical anion and cation probe substances I and II, possessing 5-hexenyl structures.
Scheme 3: Reductive ET reactions of the probe I (left) and oxidative ET reactions of probe II (right).
Scheme 4: Reaction of silyl ether 1a with Cu(OAc)2 in the absence or presence of n-Bu4NF.
Scheme 5: SmI2-promoted preparation of 1 and subsequent reaction with CuX2.
Scheme 6: Reaction of cyclopropanol 1b with Cu(OAc)2.
Scheme 7: Plausible reaction pathways for the reaction of 1b with Cu(OAc)2.
Scheme 8: Reaction of cyclopropanol 1b with various copper(II) salts (CuX2).
Scheme 9: Formation of acetoamide 16 from the cation 13.
Scheme 10: Reaction of cyclopropanol 1c with various copper(II) salts (CuX2).
Scheme 11: Reaction of cyclopropanol 1d with various Cu(OAc)2.
Scheme 12: Comparison of reaction pathways of ring-expanded radical 27 and 28.
Beilstein J. Org. Chem. 2013, 9, 1217–1225, doi:10.3762/bjoc.9.138
Graphical Abstract
Scheme 1: Aliphatic C–H oxidation with amidines and ketimines by 1,5-H radical shift.
Scheme 2: Aliphatic C–H oxidation with hydroperoxides.
Scheme 3: Proposed reaction mechanisms for the formation of 2a, 3a, and 4a.
Scheme 4: Proposed reaction mechanisms for the formation of 5 and 6.
Scheme 5: The reaction of secondary hydroperoxide 1o.
Scheme 6: 1,4-Dioxygenation of alkanes.
Scheme 7: Aerobic 1,4-dioxygenation of alkanes in the CuCl–NHPI catalytic system.
Beilstein J. Org. Chem. 2013, 9, 1194–1201, doi:10.3762/bjoc.9.135
Graphical Abstract
Figure 1: Examples of naturally occurring quinazoline alkaloids.
Figure 2: Different approaches to the synthesis of quinazoline alkaloid structures.
Scheme 1: Oxidation of other aminal systems.
Beilstein J. Org. Chem. 2012, 8, 1909–1915, doi:10.3762/bjoc.8.221
Graphical Abstract
Scheme 1: Synthetic procedure for N,N''-dimethyldiethylene triamine.
Scheme 2: Standard reaction for the kinetic study.
Figure 1: Kinetic profile for varying [DMDETA].
Figure 2: Reaction order for copper from 0.025–0.64 mol %.
Figure 3: DMEDA versus DMDETA under air and nitrogen atmosphere.
Scheme 3: Long-chained aliphatic amines as ligands.
Beilstein J. Org. Chem. 2012, 8, 1730–1746, doi:10.3762/bjoc.8.198
Graphical Abstract
Scheme 1: Typical catalytic cycle for Pd(II)-catalyzed alkenylation of indoles.
Scheme 2: Application of Fujiwara’s reaction to electron-rich heterocycles.
Scheme 3: Regioselective alkenylation of the unprotected indole.
Scheme 4: Plausible mechanism of the selective indole alkenylation, adapted from [49].
Scheme 5: Directing-group control in intermolecular indole alkenylation.
Scheme 6: Direct C–H alkenylation of N-(2-pyridyl)sulfonylindole.
Scheme 7: N-Prenylation of indoles with 2-methyl-2-butene.
Scheme 8: Proposed mechanism of the N-indolyl prenylation.
Scheme 9: Regioselective arylation of indoles by dual C–H functionalization.
Scheme 10: Plausible mechanism of the selective indole arylation.
Scheme 11: Chemoselective cyclization of N-allyl-1H-indole-2-carboxamide derivatives.
Scheme 12: Intramolecular annulations of alkenylindoles.
Scheme 13: A mechanistic probe for intramolecular annulations of alkenylindoles, adapted from Ferreira et al. [66]....
Scheme 14: Asymmetric indole annulations catalyzed by chiral Pd(II) complexes.
Scheme 15: Aerobic Pd(II)-catalyzed endo cyclization and subsequent amide cleavage/ester formation.
Scheme 16: Synthesis of the pyrimido[3,4-a]indole skeleton by intramolecular C-2 alkenylation.
Scheme 17: Synthesis of azepinoindoles by oxidative Heck cyclization.
Scheme 18: Enantioselective synthesis of 4-vinyl-substituted tetrahydro-β-carbolines.
Scheme 19: Pd-catalyzed endo-cyclization of 3-alkenylindoles for the construction of carbazoles.
Scheme 20: Pd-catalyzed hydroamination of 2-indolyl allenamides.
Scheme 21: Amidation reaction of 1-allyl-2-indolecarboxamides.
Scheme 22: Intramolecular cyclization of N-benzoylindole.
Scheme 23: Intramolecular alkenylation/carboxylation of alkenylindoles.
Scheme 24: Intermolecular alkenylation/carboxylation of 2-substituted indoles.
Scheme 25: Mechanistic investigation of the cyclization/carboxylation reaction.
Scheme 26: Plausible catalytic cycle for the cyclization/carboxylation of alkenylindoles, adapted from Liu et ...
Scheme 27: Intramolecular domino reactions of indolylallylamides through alkenylation/halogenation or alkenyla...
Scheme 28: Proposed mechanism for the alkenylation/esterification process through iminium intermediates.
Scheme 29: Cyclization of 3-indolylallylcarboxamides involving 1,2-migration of the acyl group from spiro-inte...
Scheme 30: Domino reactions of 2-indolylallylcarboxamides involving N–H functionalization.
Scheme 31: Cyclization/acyloxylation reaction of 3-alkenylindoles.
Scheme 32: Doubly intramolecular C–H functionalization of a 2-indolylcarboxamide bearing two allylic groups.