An improvedprocedure of the Sharpless method for the preparation of chiral sulfinates by triphenylphosphine is described. A mixture of sulfonyl chlorides and diacetone-d-glucose or l-menthol in the presence of triethylamine was treated with triphenylphosphine in CH2Cl2 at 0°C to give the sulfinates in good yields.
Determination of the absolute configurations of isotopically chiral molecules using vibrational circular dichroism (VCD) spectroscopy: the isotopically chiral sulfoxide, perdeuteriophenyl-phenyl-sulfoxide
作者:Józef Drabowicz、Adrian Zajac、Piotr Lyzwa、Philip J. Stephens、Jian-Jung Pan、Frank J. Devlin
DOI:10.1016/j.tetasy.2007.12.014
日期:2008.2
The (+) and (-) enantiomers of the isotopically chiral sulfoxide, perdeuteriophenyl-phenyi-sulfoxide, 1, have been synthesized by the reaction of the diastereomers of O-menthyl benzenesulfinate with C6D5MgBr. Their absolute configurations have been determined by comparison of the vibrational circular dichroism (VCD) spectra of (R)-1 and (S)-1, predicted using ab initio DFT, to the experimental VCD spectrum of 1. The absolute configuration of 1 is shown to be (S)(+)1(R)(-). This is the first application of VCD to the determination of the absolute configuration of an isotopically chiral sulfoxide. (c) 2008 Elsevier Ltd. All rights reserved.
Hajipour, Abdolreza; Islami, Fereshteh, Indian Journal of Chemistry - Section B Organic and Medicinal Chemistry, 1999, vol. 38, # 4, p. 461 - 462