2-, or 4-Alkylcyclohexanone enamines of L-proline t-butyl ester were formed. Asymmetric syntheses of 2-alkylcyclohexanone derivatives were carried out by these enamines reacting with alkylating agents, i. e. acrylonitrile, methyl acrylate, and allyl bromide. The mechanism of this asymmetric induction was deduced from the experimental results.
