N-pyrazolyl-1,2,4-triazolo[1,5-c]pyrimidine-2-sulfonamide...

Details N-pyrazolyl-1,2,4-triazolo[1,5-c]pyrimidine-2-sulfonamide... N-pyrazolyl-1,2,4-triazolo[1,5-c]pyrimidine-2-sulfonamide...

C - Chemistry, Metallurgy

07

D

C07D 487/04 (2006.01) A01N 43/90 (2006.01)

Patent

CA 2074100

ABSTRACT OF THE INVENTION N-(3-, 4-, and 5-)-pyrazolyl-1,2,4-tri- azolo[1,5-c]pyrimidine-2-sulfonamide compounds, substituted on the pyrimidine ring with an alkoxy group and on the pyrazine ring, such as N-(4-bromo-1- -methylpyrazol-3 yl)-7-chloro-5-methoxy-1,2,4-tri- azolo[1,5-c]pyrimidine-2-sulfonamide, were prepared from alkoxy substituted 1,2,4-triazolo[1,5-c]- pyrimidine-2-sulfonyl halides by condensation with substituted (3-, 4-, and 5-aminopyrazoles in the presence of a pyridine base and a catalytic amount of dimethyl sulfoxide. The compounds were found to possess general and, in some cases, selective pre- and postemergence herbicidal activity. 50,000-F

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