Patent ID: 7179945
Filing Date: 2007-02-20
Classification: C07C

Abstract:
1. A method of producing a di(aminomethyl)-substituted aromatic compound represented by the following formula I: wherein R is a bivalent aromatic group and optionally substituted by a group inert to hydrogenation, by a two-stage hydrogenation comprising: a first stage of hydrogenating an aromatic dinitrile represented by the following formula II: wherein R is the same as defined above, into a cyano(aminomethyl)-substituted aromatic compound represented by the following formula III: wherein R is the same as defined above, in the presence of a catalyst X containing Pd; and a second stage of hydrogenating the cyano(aminomethyl)-substituted aromatic compound from the first stage into the di(aminomethyl)-substituted aromatic compound in the presence of a catalyst Y containing Ni and/or Co.