Process for preparing 3 amino 1, 2, 4-benzotriazine dioxide

Details Process for preparing 3 amino 1, 2, 4-benzotriazine dioxide Process for preparing 3 amino 1, 2, 4-benzotriazine dioxide

1995-12-04

1997-09-30

Shah, Mukund J.

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

Organic compounds

Four or more ring nitrogens in the bicyclo ring system

C07D253065

Patent

active

056727020

ABSTRACT:
Process of producing 3-amino-1,2,4-benzotriazine 1,4-dioxide by reacting benzofurazan-1 oxide with disodiumcyanamide under homogeneous conditions followed by allowing crystallization to occur in a buffered solution. In a preferred embodiment, the process comprises reacting benzofurazan-1 oxide with cyanamide and sodium hydroxide under homogeneous conditions followed by purification in a mixture of acetone and acetic acid.

REFERENCES:
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patent: 3980779 (1976-09-01), Ley et al.
patent: 3991189 (1976-11-01), Seng et al.
patent: 5175287 (1992-12-01), Lee et al.
patent: 5484612 (1996-01-01), Brown
Seng F. et al "Simple Synthesis of 3-Amino-1,2-4-Benzatriozine". Angew. Chem. 84, 1061, (1972).

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