AN IMPROVED PROCESS FOR THE PREPARATION OF 3,5-DIAMINO-6-(2,3-DICHLOROPHENYL)-1,2,4-TRIAZINE

摘要

There is disclosed an improved process for the preparation of 3,5-diamino-6-(2,3-dichlorophenyl)-1,2,4-triazine which processcomprises the step of reacting 2,3-dichlorobenzoylchloride with cuprouscyanide in presence of acetonitrile and a cosolvent to producedichlorobenzoyl cyanide said dichlorobenzoyl cyanide is reacted withaminoguanidine bicarbonate to produce an intermediate product, whichis cyclized in presence of aqueous potassium hydroxide to produce 3,5-diamino-6-(2,3-dichlorophenyl)-1,2,4-triazine.