Action d'organomagnesiens sur des sulfures et des sels de sulfonium allyliques catalysee par des sels cuivreux
作者:Y. Gendreau、J.F. Normant、J. Villieras
DOI:10.1016/s0022-328x(00)91810-2
日期:1977.12
Grignard reagents react with allylsulphides, in the presence of catalytic amounts of copper(I) salts, giving alkenes. The corresponding sulphonium salts react more rapidly. Allyic rearrangement cannot be completely avoided.
[3-(Ethylthio)allyl]titanium reagent generated easily from allyl ethyl sulfides condensed with aldehydes to give erythro-β-hydroxy sulfides in highly regio- and stereoselective manner. In contrast, crotyl ethyl sulfide reacted with aldehydes affording δ-hydroxy vinyl sulfide exclusively. The substitution pattern of the starting sulfide can have a pronounced effect on the selectivity in this condensation reaction