Preparation of N-(-3(((aryl)amino)suldonyl)-1H-1,2,4-triazol-5-y

Details Preparation of N-(-3(((aryl)amino)suldonyl)-1H-1,2,4-triazol-5-y Preparation of N-(-3(((aryl)amino)suldonyl)-1H-1,2,4-triazol-5-y

1989-06-05

1990-06-26

Hollrah, Glennon H.

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

548263, C07D24912

Patent

active

049373501

ABSTRACT:
N-(3-(((2,6-Dihalophenyl)amino)sulfonyl)-1H-1,2,4-triazol-5-yl)amines, intermediates for the preparation of herbicidal substituted 1,2,4-triazolo(1,5-a)pyrimidine-2-sulfonanilides, are directly prepared from an appropriataely substituted 4-bromoaniline and a protected 5-amino-1,2,4-triazole-3-sulfonyl chloride. The improved reaction scheme involves the individual reaction steps of (a) coupling, (b) halogenation and (c) reduction.

REFERENCES:
patent: 4734123 (1988-03-01), Monte
patent: 4740233 (1988-04-01), Kleschick et al.
patent: 4818273 (1989-04-01), Kleschick et al.
Rowson et al, "Preparation of Aryltriozole, etc", CA 108:94569r (1988).
Jelich et al, "Preparation of [1,2,4]triazolo, etc", CA 109:93057f (1988).

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