Process for the purification of substituted 4-amino-1,2,4-...

Details Process for the purification of substituted 4-amino-1,2,4-... Process for the purification of substituted 4-amino-1,2,4-...

C - Chemistry, Metallurgy

07

D

C07D 253/075 (2006.01)

Patent

CA 2135351

Substituted 4-amino-1,2,4-triazine-5-ones are purified to remove unwanted N-isomers by maintaining the crude product at a temperature of from about 55°C to about 70°C in the presence of a hydroxide, preferably an alkali metal hydroxide for at least 0.5 hour.

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