Abstract
Abstract This chapter considers allylboranes in organic synthesis. Focusing on the stability of allylboranes, the chapter displays how allyldialkylboranes can be used in further reactions if either they are prepared and used directly at low temperature, or the predominant isomer at equilibrium is the required isomer. The chapter also discusses the reaction of allylboranes with carbonyl compounds. It examines how triallylboranes react with aldehydes and ketones to give, on hydrolysis, homoallylic alcohols. The chapter then investigates the synthesis of homochiral homoallylic alcohols containing one chiral centre, and the synthesis of homoallylic alcohols containing two chiral centres. It ends with a discussion of boron enolates in organic synthesis.
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