Process for production of cyclic diamine compounds or salts thereof

摘要

The present invention is directed to a process for producing cyclic diamine compounds (4) or salts or intermediates thereof according to the following reaction scheme: (wherein R is a protective group and Ar is an optionally substituted aryl group). According to the present invention, the cyclic diamine compounds (4) useful as drugs or salts or intermediates thereof can be produced at high levels of yield and purity in terms of industrially advantageous productivity.