C - Chemistry – Metallurgy – 07 – D
Patent
C - Chemistry, Metallurgy
07
D
260/313.3
C07D 249/14 (2006.01)
Patent
CA 2018158
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 appropriately substituted 4-bromo- aniline 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. 37,624-F
Pews (r.) Garth
Shankar Ravi B.
Dowelanco
Pews (r.) Garth
Shankar Ravi B.
Smart & Biggar
The Dow Chemical Company
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