Patent ID: 6403803
Filing Date: 2002-06-11
Classification: C07D

Abstract:
A process for working up reaction mixtures comprising 5-aminomethyl-2-chlorothiazole and bis(2-chlorothiazolyl-5-methyl)amine obtained by reacting 5-chloromethyl-2-chlorothiazole with ammonia comprising(1) separating off any ammonia present in the reaction mixture, (2) admixing the resultant reaction mixture with an amount of water and an amount of an inorganic acid HX such that at least 85% of the total amount of the bis(2-chlorothiazolyl-5-methyl)amine salt thereby formed precipitates out and at least 85% of the total amount of the 5-aminomethyl-2-chlorothiazole salt thereby formed remains in solution, and (3) separating off the precipitated-out bis(2-chlorothiazolyl-5-methyl)amine salt.