申请人:DowElanco
公开号:EP0537423A1
公开(公告)日:1993-04-21
N-(3-, 4-, and 5-)-pyrazolyl-1,2,4-triazolo[1,5-c]pyrimidine-2-sulfonamide compounds of formula (I),
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-triazolo[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.
式 (I) 的 N-(3-、4-和 5-)-吡唑基-1,2,4-三唑并[1,5-c]嘧啶-2-磺酰胺化合物、
由烷氧基取代的 1,2,4-三唑并[1,5-c]嘧啶-2-磺酰胺化合物,如 N-(4-溴-1-甲基吡唑-3-基)-7-氯-5-甲氧基-1,2,4-三唑并[1,5-c]嘧啶-2-磺酰胺,由烷氧基取代的 1、2,4-三唑并[1,5-c]嘧啶-2-磺酰卤,在吡啶碱和催化量的二甲亚砜存在下,通过与取代的(3-、4-和 5-氨基吡唑)缩合制备而成。研究发现,这些化合物具有普遍的除草活性,在某些情况下还具有选择性萌芽前和萌芽后除草活性。