| 摘要 |
NEW MATERIAL:A compound of formual I [R is H, COOR' (R' is lower alkyl); Me is methyl; X, Y are H, lower alkyl, lower alkoxy, halogen; X is N=CR<2>- (R<2> is H, halogenated alkyl or may be form an O-containing 5-membered ring together with Y)]. EXAMPLE:N-[( 4, 6-Dimethoxypyrimidin-2-yl )aminocarbonyl]-4-ethoxycarbonyl-1- methylpyrazole-3-sulfonamide. USE:Herbicide: it shows high herbicidal activity with a much less dose than in the conventional. PREPARATIONThe reaction between a pyrazolesulfonyl isocyanate of formula IIand an aminopyrimidine or aminotriazine of formula III is carried out in a sufficiently dried inert solvent such as dioxane to give the compound of formula I .
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