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Search for "KBr" in Full Text gives 291 result(s) in Beilstein Journal of Organic Chemistry. Showing first 200.

Nucleofugal behavior of a β-shielded α-cyanovinyl carbanion

  • Rudolf Knorr and
  • Barbara Schmidt

Beilstein J. Org. Chem. 2018, 14, 3018–3024, doi:10.3762/bjoc.14.281

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  • ), 30.9 and 32.4 (2 q, 2 × 3-CH3), 35.7 (quat, Me3C), 49.42 (quat, C-3), 49.57 (quat, C-1), 74.6 (d, HCO), 110.9 (quat, C-α), 118.3 (quat, C≡N), 122.1 (d, C-4), 122.4 (d, C-7), 127.7 and 127.9 (2 d, C-5/-6), 147.6 (quat, C-7a), 148.0 (quat, C-3a), 180.6 ppm (quat, C-2); IR (KBr): 3475 (O–H), 2927, 2869
  • comparison with 7 and benzyl alcohol; IR (KBr): 3404 (O–H), 2971, 2228 (C≡N), 1487, 1458, 1368, 1052, 751, 716 cm−1; anal. calcd for C22H23NO (317.4): C, 83.24; H, 7.30; N, 4.41; found: C, 83.39; H, 7.33; N, 4.48. 3´-Cyclopropyl-3´-hydroxy-2´-(1,1,3,3-tetramethylindan-2-ylidene)propionitrile (9). Using the
  • (2 q, 2 × 3-CH3), 49.11 and 49.16 (2 quat, C-3 and C-1), 71.2 (d, HCO), 112.3 (quat, C-α), 117.4 (quat, C≡N), 122.1 (d, C-4), 122.5 (d, C-7), 127.76 and 127.87 (2 d, C-5/-6), 147.71 (quat, C-7a), 147.92 (quat, C-3a), 178.6 (quat, C-2) ppm, assigned as above; IR (KBr): 3471 (O–H), 2993, 2961, 2928
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Published 11 Dec 2018

Bioinspired cobalt cubanes with tunable redox potentials for photocatalytic water oxidation and CO2 reduction

  • Zhishan Luo,
  • Yidong Hou,
  • Jinshui Zhang,
  • Sibo Wang and
  • Xinchen Wang

Beilstein J. Org. Chem. 2018, 14, 2331–2339, doi:10.3762/bjoc.14.208

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  • spectrometer with KBr as the diluents. Electrochemical measurements were conducted with a Biologic VSP-300 Electrochemical System in a conventional three electrode cell. The 1H NMR experiments were performed on Bruker AVANCE 400M spectrometers. Transmission electron microscopy (TEM) was obtained using a FEI
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Published 05 Sep 2018

Dynamic light scattering studies of the effects of salts on the diffusivity of cationic and anionic cavitands

  • Anthony Wishard and
  • Bruce C. Gibb

Beilstein J. Org. Chem. 2018, 14, 2212–2219, doi:10.3762/bjoc.14.195

Graphical Abstract
  • site of 1 (blue). Representative plots of the volume-weighted distribution obtained by DLS for salts titrated into 2.00 mM 1: a) LiCl, b) LiBr, c) LiI, d) NaF, e) NaCl, f) NaBr, g) NaI, h) KF, i) KCl, j) KBr, k) KI, l) CsF, m) CsCl, n) CsBr, o) CsI. Scale shown in the upper-left corner. The x-axis
  • ) KCl, j) KBr, k) KI, l) CsF, m) CsCl, n) CsBr, o) CsI. Scale shown in the upper left corner. The x-axis represents hydrodynamic diameter, the y-axis the concentration of the respective salt (mM), and the z-axis the relative intensity. Visualization of the competitive equilibrium between iodide binding
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Published 23 Aug 2018

Studies towards the synthesis of hyperireflexolide A

  • G. Hari Mangeswara Rao

Beilstein J. Org. Chem. 2018, 14, 2106–2111, doi:10.3762/bjoc.14.185

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  • evaporator. Melting points were recorded on JSGW melting point apparatus and are uncorrected. Infrared spectra were recorded on Perkin-Elmer 1320 and Shimadzu 420 spectrophotometers as KBr pellets (solids), or as thin films on NaCl flats (liquids). 1H NMR spectra were recorded at 400 MHz on a JEOL
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Published 13 Aug 2018

Coordination-driven self-assembly vs dynamic covalent chemistry: versatile methods for the synthesis of molecular metallarectangles

  • Li-Li Ma,
  • Jia-Qin Han,
  • Wei-Guo Jia and
  • Ying-Feng Han

Beilstein J. Org. Chem. 2018, 14, 2027–2034, doi:10.3762/bjoc.14.178

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  • AVANCE III spectrometer. IR spectra of the solid samples (KBr tablets) were recorded on a Bruker EQUINOX-55 (TENSOR27) IR spectrometer. Mass spectra were obtained with UltiMate3000 spectrometers. General procedure for the synthesis of L1 and L2 L1: To 4-formylpyridine (195 mg, 1.82 mmol) in dry CH3OH (20
  • ) δ 8.77 (s, 2H, -NCH-), 8.76 (d, J = 6.0 Hz, 4H), 7.87 (d, J = 6.0 Hz, 4H), 7.72 (d, J = 8.4 Hz, 4H), 7.41 (d, J = 8.4 Hz, 4H), 7.36 (s, 2H, -CH=CH-); IR (KBr, cm−1): 3419 (m), 1597 (s), 1411 (m), 962 (m), 831 (s), 632 (m), 561 (s). L2: A modified synthetic procedure adapted from literature methods
  • crystallized from CH2Cl2/hexane (1:1) to give L2 (220 mg, 65%). 1H NMR (400 MHz, DMSO-d6, ppm) δ 8.83 (s, 2H, -NCH-), 8.82 (d, J = 6.0 Hz, 4H), 8.26 (d, J = 8.4 Hz, 2H), 8.01 (d, J = 6.0 Hz, 4H), 7.62 (t, 2H), 7.40 (d, J = 7.2 Hz, 2H); IR (KBr, cm−1): 3024 (w), 1624 (s), 1597 (s), 1404 (s), 1317 (s), 1232 (s
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Published 03 Aug 2018

Synthesis of new p-tert-butylcalix[4]arene-based polyammonium triazolyl amphiphiles and their binding with nucleoside phosphates

  • Vladimir A. Burilov,
  • Guzaliya A. Fatikhova,
  • Mariya N. Dokuchaeva,
  • Ramil I. Nugmanov,
  • Diana A. Mironova,
  • Pavel V. Dorovatovskii,
  • Victor N. Khrustalev,
  • Svetlana E. Solovieva and
  • Igor S. Antipin

Beilstein J. Org. Chem. 2018, 14, 1980–1993, doi:10.3762/bjoc.14.173

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  • solutions dried on the surface of the KBr disc. Melting points were measured using a Stuart SMP10 apparatus. UV–vis absorbance spectra The UV–vis-spectra were recorded on a Lambda 35 UV/VIS spectrophotometer (Perkin Elmer Instruments) in an optical cell with 1.0 cm light pass at 298 K. Dynamic light
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Published 31 Jul 2018

Diazirine-functionalized mannosides for photoaffinity labeling: trouble with FimH

  • Femke Beiroth,
  • Tomas Koudelka,
  • Thorsten Overath,
  • Stefan D. Knight,
  • Andreas Tholey and
  • Thisbe K. Lindhorst

Beilstein J. Org. Chem. 2018, 14, 1890–1900, doi:10.3762/bjoc.14.163

Graphical Abstract
  • signals were done using 2D experiments (COSY, HSQC and HMBC). IR spectra were measured with a Perkin Elmer FT IR Paragon 1000 (KBr). Optical rotation values were determined with a Perkin-Elmer polarimeter (589 nm, length of cuvette: 1 dm). MS analysis of synthetic products were carried out with a MALDI
  • product was isolated as a colorless solid (17.2 mg, 30.0 µmol, 19%); Rf = 0.76 (ethyl acetate/methanol 2:1); UV–vis (MeOH) λmax: 345 nm; FTIR (KBr) : 3317, 2927, 2503, 2093, 1671, 1637, 1550, 1511, 1224, 1015, 940, 681 cm−1; 1H NMR (500 MHz, MeOH-d4) δ 7.99 (d, 3J = 8.5 Hz, 2H, CHaryl-2‘,6‘), 7.48 (d, 3J
  • mixture stirred overnight at room temperature. The solvent was removed under vacuum and purified with flash column chromatography (ethyl acetate/methanol 6:1) leading to a colorless solid (158 mg, 369 µmol, quant.); Rf = 0.15 (ethyl acetate/methanol 6:1); mp 74 °C; [α]D21 = 91.8 (c 0.5, MeOH); FTIR (KBr
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Published 24 Jul 2018

First thia-Diels–Alder reactions of thiochalcones with 1,4-quinones

  • Grzegorz Mlostoń,
  • Katarzyna Urbaniak,
  • Paweł Urbaniak,
  • Anna Marko,
  • Anthony Linden and
  • Heinz Heimgartner

Beilstein J. Org. Chem. 2018, 14, 1834–1839, doi:10.3762/bjoc.14.156

Graphical Abstract
  • spectra were registered with a FTIR NEXUS spectrometer (as film or KBr pellets). UV–vis spectra were recorded using a UV–vis JASCO V-630 spectrophotometer. Melting points were determined in capillaries with a Stuart SMP30 apparatus with automatic temperature monitoring. Starting materials: 1,4
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Published 19 Jul 2018

Graphitic carbon nitride prepared from urea as a photocatalyst for visible-light carbon dioxide reduction with the aid of a mononuclear ruthenium(II) complex

  • Kazuhiko Maeda,
  • Daehyeon An,
  • Ryo Kuriki,
  • Daling Lu and
  • Osamu Ishitani

Beilstein J. Org. Chem. 2018, 14, 1806–1812, doi:10.3762/bjoc.14.153

Graphical Abstract
  • measurement. FTIR spectra of g-C3N4 synthesized at different temperatures. Each spectrum was acquired by a KBr method in N2 atmosphere. TEM images of g-C3N4 synthesized at different temperatures. UV–visible diffuse reflectance spectra of g-C3N4 synthesized at different temperatures. A typical TEM image of Ag
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Published 17 Jul 2018

Design, synthesis and structure of novel G-2 melamine-based dendrimers incorporating 4-(n-octyloxy)aniline as a peripheral unit

  • Cristina Morar,
  • Pedro Lameiras,
  • Attila Bende,
  • Gabriel Katona,
  • Emese Gál and
  • Mircea Darabantu

Beilstein J. Org. Chem. 2018, 14, 1704–1722, doi:10.3762/bjoc.14.145

Graphical Abstract
  • macromolecular shape in solution). DFT calculations (in solution), (VT) NMR and IR (KBr) spectroscopy supported these assignments. TEM analysis revealed the ability of the title compounds towards self-assembling into homogeneously packed spherical nano-aggregates. Conclusions: The (non)covalent synthesis and
  • quantitative yields (Scheme 4) (Supporting Information File 1, pp. S6–S11; pp. S24–S39, Figures S25–S54). 3 Structural assignments Our research continued with a structural study, implemented by means of DFT calculations, solution (VT) NMR techniques, IR (KBr) spectroscopy and TEM analysis. 3.1 Assignments
  • terms rotamerism of G-0 dendrons 2a and 3 about the C(s-triazine)–N(exocyclic) partial double bonds. Comparative details from 1H NMR spectra of G-2 dendrimer 5 (500 MHz, 5.0 mM in DMSO-d6). Comparative IR spectra (KBr) of compounds 7a vs 7b (a), 7b vs trimesic acid (b), 8 vs C1 (c) and 9 vs C3 (d). 2D
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Published 09 Jul 2018

Selective carboxylation of reactive benzylic C–H bonds by a hypervalent iodine(III)/inorganic bromide oxidation system

  • Toshifumi Dohi,
  • Shohei Ueda,
  • Kosuke Iwasaki,
  • Yusuke Tsunoda,
  • Koji Morimoto and
  • Yasuyuki Kita

Beilstein J. Org. Chem. 2018, 14, 1087–1094, doi:10.3762/bjoc.14.94

Graphical Abstract
  • , 22.1, 56.3, 71.3, 110.3, 111.2, 113.3, 127.6, 128.7, 135.8, 156.0, 170.2 ppm; IR (KBr): 2984, 2158, 1741, 1603, 1499, 1370, 1291, 1242, 1208, 1062, 1023 cm−1; HRMS (MALDI): [M + Na]+ calcd for C12H13NO3SNa, 274.0507; found, 274.0508. Representative experimental procedure for the benzylic C–H
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Published 16 May 2018

One-pot synthesis of diaryliodonium salts from arenes and aryl iodides with Oxone–sulfuric acid

  • Natalia Soldatova,
  • Pavel Postnikov,
  • Olga Kukurina,
  • Viktor V. Zhdankin,
  • Akira Yoshimura,
  • Thomas Wirth and
  • Mekhman S. Yusubov

Beilstein J. Org. Chem. 2018, 14, 849–855, doi:10.3762/bjoc.14.70

Graphical Abstract
  • very viscous and dark reaction mixture (Table 1, entry 1). Full conversion of the starting materials could not be achieved even after 24 h stirring. The addition of aqueous KBr to the reaction mixture resulted in the formation of the desired bromide salt 3a in 30% isolated yield. The addition of KBr is
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Published 12 Apr 2018

Bromide-assisted chemoselective Heck reaction of 3-bromoindazoles under high-speed ball-milling conditions: synthesis of axitinib

  • Jingbo Yu,
  • Zikun Hong,
  • Xinjie Yang,
  • Yu Jiang,
  • Zhijiang Jiang and
  • Weike Su

Beilstein J. Org. Chem. 2018, 14, 786–795, doi:10.3762/bjoc.14.66

Graphical Abstract
  • , TBAI or tetrabutylammonium chloride (TBAC) did not provide a satisfactory result (Table S1, entries 3 and 4). It was interesting to find that using bromide salts (LiBr, NaBr, KBr and TBAB) as additives, not only the conversion rate of 1a was increased, but also the side-product 4a was suppressed
  • 1), which showed silica gel played an important role of promoting the dehalogenations. When using a halogen salt (NaBr, KBr, NaCl) as grinding auxiliary, NaBr displayed the most efficiency (Table 2, entries 3–6), and lowering the amount of NaBr did not significantly influence the product yield
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Published 06 Apr 2018

Copper-catalyzed asymmetric methylation of fluoroalkylated pyruvates with dimethylzinc

  • Kohsuke Aikawa,
  • Kohei Yabuuchi,
  • Kota Torii and
  • Koichi Mikami

Beilstein J. Org. Chem. 2018, 14, 576–582, doi:10.3762/bjoc.14.44

Graphical Abstract
  • , 134.3, 131.3, 123.9, 121.0 (t, JC-F = 311.6 Hz), 84.8 (dd, JC-F = 25.6, 23.4 Hz), 63.4, 18.4, 14.0; 19F NMR (282 MHz, CDCl3) δ −56.9 (d, 1F, J = 168.6 Hz), −58.9 (d, 1F, J = 165.3 Hz); HRMS (APCI-TOF): [M]−· calcd for C13H12BrF2NO6, 394.9816; found, 394.9835; FTIR (KBr pellet, cm−1) 716, 843, 876, 961
  • (282 MHz, CDCl3) δ −79.19 (s, 3F), −121.42 (d, J = 280.9 Hz, 1F), −122.98 (d, J = 279.7 Hz, 1F); HRMS (APCI-TOF): [M]−· calcd for C14H12F5NO6, 385.0585; found, 385.0582; FTIR (KBr pellet, cm−1) 1014, 1142, 1208, 1222, 1281, 1350, 1385, 1533, 1747, 2942, 2987, 3059; [α]D25 −27.75 (c 1.02, CHCl3); HPLC
  • , 123.9, 118.4–104.7 (m), 117.3 (qt, JC-F = 288.4, 33.2 Hz), 82.8 (t, JC-F = 25.4 Hz), 63.5, 17.1, 13.8; 19F NMR (282 MHz, CDCl3) δ –80.7 (m, 3F), –116.4 to −126.0 (m, 14F); HRMS (APCI-TOF): [M]−· calcd for C20H12F17NO6, 685.0393; found, 685.0362; FTIR (KBr pellet cm−1) 847, 969, 1009, 1142, 1214, 1246
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Published 07 Mar 2018

Transition-metal-free [3 + 3] annulation of indol-2-ylmethyl carbanions to nitroarenes. A novel synthesis of indolo[3,2-b]quinolines (quindolines)

  • Michał Nowacki and
  • Krzysztof Wojciechowski

Beilstein J. Org. Chem. 2018, 14, 194–202, doi:10.3762/bjoc.14.14

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  • , yield 266 mg (59%); mp 176–178 °C (EtOAc/hexane); IR (KBr): 3052, 2958, 2900, 2874, 2855, 1971, 1936, 1903, 1820, 1780, 1736, 1618, 1578, 1547, 1496, 1480, 1460, 1444, 1424, 1408, 1382, 1366, 1332, 1320, 1302, 1221 cm−1; 1H NMR (500 MHz, CDCl3) δ 0.78 (t, J = 7.4 Hz, 3H), 1.06 (sex, J = 7.5 Hz, 2H
  • crude product was purified by column chromatography (silica gel, EtOAc/toluene: 1:10, then 1:5, then 1:2). Yellow solid, yield 167 mg (40%); mp 168–170 °C (EtOAc/hexane; then washed with pentane); IR (KBr): 3032, 3005, 2974, 2933, 2909, 2877, 1739 (CO), 1725 (CO), 1620, 1592, 1572, 1484, 1461, 1387
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Published 23 Jan 2018

Polarization spectroscopy methods in the determination of interactions of small molecules with nucleic acids – tutorial

  • Tamara Šmidlehner,
  • Ivo Piantanida and
  • Gennaro Pescitelli

Beilstein J. Org. Chem. 2018, 14, 84–105, doi:10.3762/bjoc.14.5

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Published 08 Jan 2018

Reactivity of bromoselenophenes in palladium-catalyzed direct arylations

  • Aymen Skhiri,
  • Ridha Ben Salem,
  • Jean-François Soulé and
  • Henri Doucet

Beilstein J. Org. Chem. 2017, 13, 2862–2868, doi:10.3762/bjoc.13.278

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  • Scheme 5 can be proposed. The first step is probably the oxidative addition of the 2-bromoselenophene to Pd(0) to afford the Pd(II) intermediate A. Then, after elimination of KBr with KOAc, a concerted metalation–deprotonation pathway involving an heteroarene gives B. Reductive elimination affords the 2
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Published 22 Dec 2017

Reagent-controlled regiodivergent intermolecular cyclization of 2-aminobenzothiazoles with β-ketoesters and β-ketoamides

  • Irwan Iskandar Roslan,
  • Kian-Hong Ng,
  • Gaik-Khuan Chuah and
  • Stephan Jaenicke

Beilstein J. Org. Chem. 2017, 13, 2739–2750, doi:10.3762/bjoc.13.270

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  • -aminobenzothiazole (1a) via an Ortoleva–King type of reaction forms B [96][97]. This is followed by a nucleophilic addition and dehydration to form C. Upon deprotonation of the acidic proton at C by KOt-Bu, the desired product 3a is formed with release of KBr and tert-butanol. As proposed by Zeitler’s group, the
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Published 18 Dec 2017

Pyrene–nucleobase conjugates: synthesis, oligonucleotide binding and confocal bioimaging studies

  • Artur Jabłoński,
  • Yannic Fritz,
  • Hans-Achim Wagenknecht,
  • Rafał Czerwieniec,
  • Tytus Bernaś,
  • Damian Trzybiński,
  • Krzysztof Woźniak and
  • Konrad Kowalski

Beilstein J. Org. Chem. 2017, 13, 2521–2534, doi:10.3762/bjoc.13.249

Graphical Abstract
  • MHz, CDCl3) δ 201.2, 133.5, 131.6, 130.7, 130.0, 129.7, 129.6, 128.5, 127.2, 126.98, 126.91, 126.7, 126.2, 124.5, 124.4, 124.1, 123.5, 44.4, 40.2; MS (EI, 70 eV) m/z: 294 ([M + 2]+), 292 (M+), 256 (acryloylpyrene+); FTIR (KBr) ν: 3122, 3109, 3053, 3036, 1664 (C=O), 847 cm−1. General procedure for the
  • +), 126 (thymine+); FTIR (KBr) ν: 3177, 3049, 2925, 2822, 1689 (C=O), 1652 (C=O), 1626 (C=O) cm−1; anal. calcd for C24H18N2O3 + CH2Cl2: C, 64.25; H, 4.31; N, 5.99; found: C, 64.03; H, 4.33; N, 5.93. Compound 3. 1H NMR (600 MHz, DMSO-d6) δ 8.80 (d, JH,H = 9.3 Hz, 1H, Pyr), 8.56 (d, JH,H = 8.1 Hz, 1H, Pyr
  • , 141.2, 133.5, 131.2, 130.7, 129.9, 129.7, 129.6, 128.6, 127.24, 127.20, 126.8, 126.7, 124.5, 124.4, 123.5, 118.9, 41.3, 39.1; ESIMS m/z: 392 (M + H+); FTIR (KBr) ν: 3300 (N-H), 3142 (N-H), 3041, 2923, 1670 (C=O), 1603 (N-H bending), 1214, 846 cm−1; anal. calcd for C24H17N5O: C, 73.64; H, 4.38; N, 17.89
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Published 28 Nov 2017

Synthesis, effect of substituents on the regiochemistry and equilibrium studies of tetrazolo[1,5-a]pyrimidine/2-azidopyrimidines

  • Elisandra Scapin,
  • Paulo R. S. Salbego,
  • Caroline R. Bender,
  • Alexandre R. Meyer,
  • Anderson B. Pagliari,
  • Tainára Orlando,
  • Geórgia C. Zimmer,
  • Clarissa P. Frizzo,
  • Helio G. Bonacorso,
  • Nilo Zanatta and
  • Marcos A. P. Martins

Beilstein J. Org. Chem. 2017, 13, 2396–2407, doi:10.3762/bjoc.13.237

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  • , resulting in a 2-azidopyrimidine compound. The structures of compounds 7a,b and 7f were also confirmed by IR spectroscopy in the solid state. The FTIR spectrum, recorded using a KBr pellet, exhibited a strong absorption band corresponding to the azido group [47] at 2140 cm−1 and 2160 cm−1, thus
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Published 10 Nov 2017

Synthesis and photophysical properties of novel benzophospholo[3,2-b]indole derivatives

  • Mio Matsumura,
  • Mizuki Yamada,
  • Atsuya Muranaka,
  • Misae Kanai,
  • Naoki Kakusawa,
  • Daisuke Hashizume,
  • Masanobu Uchiyama and
  • Shuji Yasuike

Beilstein J. Org. Chem. 2017, 13, 2304–2309, doi:10.3762/bjoc.13.226

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  • NMR signals of gold and boron complexes 8 and 9 were observed at δ = 6.0 and 11.5 ppm, respectively. These results show that the electronic nature of the phosphorus atoms is similar to that of the oxidized species 4–7 (δ = 6.0–27.0 ppm). In the IR spectrum of 4 in KBr, a strong absorption for P=O
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Published 30 Oct 2017

Solid-state studies and antioxidant properties of the γ-cyclodextrin·fisetin inclusion compound

  • Joana M. Pais,
  • Maria João Barroca,
  • Maria Paula M. Marques,
  • Filipe A. Almeida Paz and
  • Susana S. Braga

Beilstein J. Org. Chem. 2017, 13, 2138–2145, doi:10.3762/bjoc.13.212

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  • . Infrared spectra were obtained as KBr pellets in a Mattson 7000 FTIR spectrometer (resolution 2.0 cm−1; 64 scans per spectrum). 13C{1H} CP/MAS NMR spectra were recorded at 100.62 MHz on a (9.4 T) Bruker Avance III 400 spectrometer, with an optimized π/2 pulse for 1H of 4.5 μs, 3 ms contact time, a spinning
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Published 13 Oct 2017

Enzymatic separation of epimeric 4-C-hydroxymethylated furanosugars: Synthesis of bicyclic nucleosides

  • Neha Rana,
  • Manish Kumar,
  • Vinod Khatri,
  • Jyotirmoy Maity and
  • Ashok K. Prasad

Beilstein J. Org. Chem. 2017, 13, 2078–2086, doi:10.3762/bjoc.13.205

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  • Novozymes Inc., Copenhagen, Denmark. For all the lipase-mediated reactions, AR grade organic solvents were used, which were purchased from SD Fine-Chem Ltd., Mumbai, India. The IR spectra were recorded by using thin film for oils and by making KBr discs for solid samples. The 1H and 13C NMR spectra were
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Published 05 Oct 2017

Mechanically induced oxidation of alcohols to aldehydes and ketones in ambient air: Revisiting TEMPO-assisted oxidations

  • Andrea Porcheddu,
  • Evelina Colacino,
  • Giancarlo Cravotto,
  • Francesco Delogu and
  • Lidia De Luca

Beilstein J. Org. Chem. 2017, 13, 2049–2055, doi:10.3762/bjoc.13.202

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  • ), TEMPO (1–2 mol %), KBr (10 mol %), NaHCO3 (pH 8.6), CH2Cl2/H2O. b) Stahl protocol: [Cu(MeCN)4](OTf) (5 mol %), bpy (5 mol %), TEMPO (5 mol %), NMI (10 mol %), CH3CN, air. c) Gao (2016) protocol: Fe(NO)3.9H2O (10 mol %), 9-azabicyclo[3.3.1]nonan-N-oxyl (ABNO, 1–3 mol %), CH3CN, air. TEMPO-assisted
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Published 02 Oct 2017

Mechanochemical synthesis of small organic molecules

  • Tapas Kumar Achar,
  • Anima Bose and
  • Prasenjit Mal

Beilstein J. Org. Chem. 2017, 13, 1907–1931, doi:10.3762/bjoc.13.186

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  • ][133] in which the component aldehyde and catalytic amount of acid were generated in situ for the final step of dihydropyrimidinone synthesis. Benzyl alcohols were oxidized by a reagent combination of oxone (0.6 equiv), KBr (10 mol %) and 2,2,6,6-tetramethylpiperidin-1-yloxy radical (TEMPO, 1 mol %) to
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Published 11 Sep 2017
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