Enantioselective chiral borane-mediated aldol reactions of silyl ketene acetals with aldehydes. The novel effect of the trialkysilyl group of the silyl ketene acetal on the reaction course
摘要:
Highly enantioselective aldol reactions of silyl ketene acetals with a variety of aldehydes were achieved by using chiral boranes prepared from the sulfonamides of alpha-amino acids.
Enantioselective chiral borane-mediated aldol reactions of silyl ketene acetals with aldehydes. The novel effect of the trialkysilyl group of the silyl ketene acetal on the reaction course
摘要:
Highly enantioselective aldol reactions of silyl ketene acetals with a variety of aldehydes were achieved by using chiral boranes prepared from the sulfonamides of alpha-amino acids.
The synthesis of 6-substituted 3-fluoro-5,6-dihydropyran-2-ones under mild conditions is described. The key step of the synthesis involves a Julia–Kocienski olefination.