Process for the preparation of 2-amino-3-chlorobenzoic acid

Details Process for the preparation of 2-amino-3-chlorobenzoic acid Process for the preparation of 2-amino-3-chlorobenzoic acid

C - Chemistry, Metallurgy

07

C

C07C 229/56 (2006.01) C07C 227/08 (2006.01)

Patent

CA 2076142

HOE 91/F 252 Abstract of the disclosure: Process for the preparation of 2-amino-3-chlorobenzoic acid The present invention relates to a process for the preparation of 2-amino-3-chlorobenzoic acid by dissolving 1 mol of 2,3-dichlorobenzoic acid in about 400 to about 2000 parts of water with at least the equimolar amount of an alkali metal hydroxide or with an aqueous solution of the equimolar amount of an alkali metal hydroxide, and subsequently reacting it with about 500 to about 2500 mol % of ammonia at temperatures of about 150° to about 220°C in the presence of copper bronze, copper(I) salts and/or copper(II) salts.

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