Method of preparing 5-amino salicylic acid

Details Method of preparing 5-amino salicylic acid Method of preparing 5-amino salicylic acid

C - Chemistry, Metallurgy

07

C

260/512.9

C07C 227/06 (2006.01) A61K 31/60 (2006.01) B01J 27/22 (2006.01) C07C 227/00 (2006.01) C07C 227/04 (2006.01) C07C 229/18 (2006.01) C07C 229/64 (2006.01) C07B 61/00 (2006.01)

Patent

CA 1287643

ABSTRACT OF THE DISCLOSURE The disclosure relates to a method of producing 5-amino salicylic acid from salicylic acid, with sulphanilic acid as the recyclable auxiliary chemical. The method according to the present invention includes linking between the diazonium salt of the sulphanilic acid and the salicylic acid, followed by a splitting by hydrogenation with hydrogen gas and catalyst, and selective precipitation of the desired product.

541202

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