Regio- and stereospecific cleavage of α,β-epoxysilanes with lithium phenylsulfide
作者:Purificación Cuadrado、Ana M González-Nogal
DOI:10.1016/s0040-4039(99)02242-x
日期:2000.2
Trimethyl- or dimethylphenylsilylepoxides react with lithium phenylsulfide to give regio- and stereodefined vinyl sulfides resulting from α-ring opening and Peterson elimination. When the epoxide bears the bulky tert-butyldiphenylsilyl group the reaction is more puzzling. Depending on the β-substitution and the presence of aluminium chloride, we obtained silyl enol ethers, α-silylaldehydes or α-hy
The Peterson Olefination Using the tert-Butyldiphenylsilyl Group: Stereoselective Synthesis of Di- and Trisubstituted Alkenes
作者:Asunción Barbero、Yolanda Blanco、Carlos García、Francisco J. Pulido
DOI:10.1055/s-2000-6409
日期:——
The reaction of α -tert-butyldiphenylsilyl carbonyl compounds with organometallics leads with a high diastereoselectivity to erythro-β-hydroxysilanes, which under acidic or basic elimination conditions give E or Z di- and trisubstituted alkenes.