A facile and efficient visible-light-driven method has been developed to construct sulfoxides via oxidative coupling of aryldiazo sulfones with thiolsusing the O2 in air as the oxidant. This reaction could be performed at room temperature under catalyst- and additive-free conditions. The present methodology offers a mild and environmentally benign approach to obtain a library of sulfoxides in good
Biocatalytic resolutions of methyl sulfinylacetates fford sulfoxides (R)-(1) - (6) in very high optical yields; the products have been used in a systematic study of the “SPAC” reaction, an asymmetric synthesis of γ-hydroxy-α,β-unsaturated esters.
Biocatalytic resolutions of sulfinylalkanoates: a facile route to optically active sulfoxides
作者:Kevin Burgess、Ian Henderson、Kwok Kan Ho
DOI:10.1021/jo00030a044
日期:1992.2
Two methods are presented for kinetic resolutions of compounds containing ester and sulfoxide functionalities (sulfinylalkanoates). In the first a crude lipase preparation from Pseudomonas sp. (K10) mediates enantioselective hydrolysis of these esters in an aqueous environment. The second method uses the same lipase preparation to promote enantioselective transesterifications with alcohols in hexane. Both procedures are suitable for preparation of sulfinylalkanoates where the ester and sulfoxide groups are separated by one or two methylene units (sulfinylacetates and sulfinylpropanoates) but compounds with three methylene "spacer groups" (sulfinylbutanoates) are not substrates for the lipase under either set of conditions.
BURGESS, KEVIN;HENDERSON, IAN, TETRAHEDRON LETT., 30,(1989) N8, C. 3633-3636