Nucleophilic additions to carbonyl compounds and imines with organometallic reagents are important for syntheses of functionalized alcohols and amines. Among them, addition using organozinc reagents based on Barbier-and Reformatsky-type reactions is a useful method in organic synthesis because the organozinc reagents are readily prepared in situ from the corresponding alkyl bromide, such as allyl bromide and R-bromoacetate, in the presence ...