PROCESS FOR PREPARING PYRAZOLE SULFONYL UREA DERIVATIVES

摘要

Title compds. (I)[A=H, C1-18 alkyl, Ph; B,C=H, halo, nitro, C1-8 alkyl, arylalkyl, C1-8 alkoxy, halo alkyl, etc.; D=H, C1-8 alkyl; X,Y=H, halo, C1-8 alkyl, alkoxy, alkoxyalkyl, alkylamino, etc. , useful as a herbicide, were prepd.. Thus, 9.2g n(butylcarbamoyl)- 1,3-dimethyl-5-methoxy-pyrazol-4-sulfonamide dissolved in 100ml benzene was refluxed by treating 8.9g phosgen to give crude 1,3- dimethyl-5-methoxypyrazol-4-sulfonyl isocyanate, 1.39g of which was dissolved in 20ml acetonitrile, treated with 0.695g 4-methoxy-6- methyl-2-aminopyrimidine, and refluxed to give 1.09g N-[(4-methoxy-6- methylpyrimidin-2-yl) aminocarbonyl -1,3dimethyl-5-methoxy pyrazol-4- sulfonimide.