Abstract: The acylation reaction of organolithium reagents with pyrrolidine-derived a- benzyloxy and a-silyloxy carboxamides provides a simple and high-yielding method for the preparation of enantiopure a-benzyloxy and a-silyloxy ketones. Key words: a-benzyloxy ketones, a-silyloxy ketones, acylations, pyrrolidine amides, organolithium reagents