The synthesis of alkenes from carbonyl compounds and carbanions α to silicon. Stereoselective synthesis of 1-trimethylsilylbuta-1,3-dienes
Abstract
Reactions of aldehydes with the 1,3-bis(trimethylsilyl)propenyl anion in the presence of magnesium bromide or trimethyl borate give stereoselectively the alcohols (2) which can be transformed stereospecifically to either (1E,3E)- or (1E,3Z)-1-trimethylsilylbuta-1,3-dienes.