practically synthesized using catalyticenantioselectivecyanosilylation of cyclohexyl phenyl ketone (6a) as a key step. Cyanohydrin 7a with 94% ee was obtained with 1 mol% of Gd-5 catalyst. The key α-hydroxy carboxylic acid 8 was synthesized from 7a in an enantiomerically pure form without column chromatography. Other cycloalkyl phenyl ketones, except cyclopentyl phenyl ketone (6e-H) gave products with