A versatile synthesis of (E)- and (Z)-1-halo-2-(alkoxymethyl)-1,3-butadienes and their condensation with aldehydes
作者:Timothy Wong、Michael W. Tjepkema、Hélène Audrain、Peter D. Wilson、Alex G. Fallis
DOI:10.1016/0040-4039(95)02303-8
日期:1996.2
direct synthesis of various stereodefined dienes 4–11 from propargyl alcohols upon direct addition of vinylmagnesium chloride and manipulation of the resulting magnesium chelate 3 is described. These halo-dienes provided access to the corresponding dienyllithium reagents which were condensed with the aldehydes 13, 15, 17, and 19 to provide the secondary alcohols 14, 16, 18, 20, and 21, respectively