Process for producing an optically active compound

摘要

The present invention provides a process for producing an optically active compound of the following formula (3) (including a salt form) which comprises the step of reacting a pyruvic acid of the following formula (1) with an indole-3-pyruvic acid of the following formula (2) in the coexistence with an optically acive ±-amino acid containing a secondary amine and a metal ion.