Search results

Search for "DDQ" in Full Text gives 156 result(s) in Beilstein Journal of Organic Chemistry.

High chemoselectivity in the phenol synthesis

  • Matthias Rudolph,
  • Melissa Q. McCreery,
  • Wolfgang Frey and
  • A. Stephen K. Hashmi

Beilstein J. Org. Chem. 2011, 7, 794–801, doi:10.3762/bjoc.7.90

Graphical Abstract
  • PMB-protected aldehyde 43 (Scheme 11) [45]. The resulting furfuryl alcohol 44 was then propargylated to give 45. The deprotection was however, problematic. Treatment of the latter with cerium ammonium nitrate led to decomposition. Only with DDQ was the desired alcohol 39 obtained in moderate yield
PDF
Album
Supp Info
Full Research Paper
Published 10 Jun 2011
Graphical Abstract
  • aromatized with DDQ in refluxing benzene, 2-bromo-1-naphthaldehyde (2) was produced in excellent yield. Reduction (NaBH4/EtOH) of the aldehyde 2 produced the alcohol 3 as a colorless solid, in 94% yield, which on reaction with PBr3/CCl4 produced the bromide 4 as a light yellow solid. The bromide was then
  • in due course. Experimental Furan-2-boronic acid, 2-tetralone and tetrakis(triphenylphosphine)palladium(0) and DDQ were purchased from Sigma-Aldrich (U.S.A). Trifluoroacetic anhydride was purchased from Alfa Aesar (Lancaster). 2-Bromo-3,4-dihydronaphthalene-1-carbaldehyde was prepared from 2
  • furoquinone 13. Assignment of chemical shifts (1H NMR and 13C NMR) of compound 13. Reagents and conditions: i) DDQ (1.5 equiv), dry benzene, reflux, argon atmosphere, 37 h, 83%. ii) NaBH4, EtOH, room temperature, 2 h, 94%. iii) PBr3, CCl4, 60 °C, 1 h, 82%. iv) KCN, DMF, room temperature, overnight then 1 h at
PDF
Album
Supp Info
Full Research Paper
Published 29 Sep 2009

Mitomycins syntheses: a recent update

  • Jean-Christophe Andrez

Beilstein J. Org. Chem. 2009, 5, No. 33, doi:10.3762/bjoc.5.33

Graphical Abstract
  • concave face of the molecule, anti to the exo-disposed benzyloxymethyl group. The standard methodology involving azide displacement gave the aziridine 84. The benzyl groups were removed using a Birch reduction and subsequent oxidation with DDQ furnished the aziridinomitosane 85 in good overall yield
PDF
Album
Review
Published 08 Jul 2009

A short stereoselective synthesis of (+)-(6R,2′S)-cryptocaryalactone via ring- closing metathesis

  • Palakodety Radha Krishna,
  • Krishnarao Lopinti and
  • K. L. N. Reddy

Beilstein J. Org. Chem. 2009, 5, No. 14, doi:10.3762/bjoc.5.14

Graphical Abstract
  • THF at 0 °C to give cinnamyl alcohol derivative 14 (87%, Scheme 3). Alcohol 14 was protected as its acetate under conventional reaction conditions. The PMB (p-methoxybenzyl protecting group) in compound 15 was selectively removed with DDQ in CH2Cl2/H2O (19:1) to afford homoallylic alcohol 16 (89
PDF
Album
Supp Info
Full Research Paper
Published 24 Apr 2009

Synthesis and redox behavior of new ferrocene- π-extended- dithiafulvalenes: An approach for anticipated organic conductors

  • Abdelwareth A. O. Sarhan,
  • Omar F. Mohammed and
  • Taeko Izumi

Beilstein J. Org. Chem. 2009, 5, No. 6, doi:10.3762/bjoc.5.6

Graphical Abstract
  • [(1,3-dithiol-2-ylidene)alkyl]ferrocenes (2) was shown to form 1:1 CT complexes with tetracyano-p-quinodimethane (TCNQ, 3) and dichlorodicyanoquinone (DDQ) 4, see Figure 1 [24][25][26]. Subsequently, a number of reports have appeared dealing with the electrochemical properties of these CT complexes of
PDF
Album
Full Research Paper
Published 19 Feb 2009

Photosonochemical catalytic ring opening of α-epoxyketones

  • Hamid R. Memarian and
  • Ali Saffar-Teluri

Beilstein J. Org. Chem. 2007, 3, No. 2, doi:10.1186/1860-5397-3-2

Graphical Abstract
  • and α-epoxyketones have also occurred thermally or photochemically by the presence of various electron acceptors. These reactions have been observed thermally by ceric ammonium nitrate (CAN), [28][29] 2,3-dichloro-5,6-dicyano-p-benzoquinone (DDQ) [30] and iron(III) chloride [31] or photo-induced
PDF
Album
Supp Info
Full Research Paper
Published 27 Jan 2007
Other Beilstein-Institut Open Science Activities