Process for the preparation of 3,5-diamino-6-(2,3-dichlorophenyl

Details Process for the preparation of 3,5-diamino-6-(2,3-dichlorophenyl Process for the preparation of 3,5-diamino-6-(2,3-dichlorophenyl

1999-12-08

2000-08-29

Ford, John M.

Organic compounds -- part of the class 532-570 series

Organic compounds

Four or more ring nitrogens in the bicyclo ring system

C07D253075

Patent

active

061111015

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

REFERENCES:
patent: 4602017 (1986-07-01), Sawyer et al.
International Search Report for PCT/IB 99/01955.

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