Process for producing 2-amino-4,6-dichloropyrimidine

Details Process for producing 2-amino-4,6-dichloropyrimidine Process for producing 2-amino-4,6-dichloropyrimidine

C - Chemistry, Metallurgy

07

D

260/263

C07D 239/42 (2006.01)

Patent

CA 1307272

ABSTRACT The present invention relates to an industrially advantageous process for producing 2-amino-4,6- dichloropyrimidine, which comprises reacting 2-amino-4,6- dihydroxypyrimidine or its salt with phosphorus oxychloride at a temperature of from 50 to 100°C in the presence of a solvent and an acid removing agent. Further, the yield of 2-amino-4,6-dichloropyrimidine can be improved by hydrolyzing 4,6-dichloro-2- pyrimidinylphosphoramidic dichloride produced as a by- product of the chlorination reaction to form 2 amino-4,6- dichloropyrimidine. The 2-amino-4,6-dichloropyrimidine produced by the process of the present invention is useful as an intermediate for medicines and agricultural chemicals.

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