The present invention relates to N-[(pyrimidin-2-yl) aminocarbonyl] benzenesulfonamide of the general formula (I) and salts which are harmless to the environment thereof.;In the formula, R 1 is methyl or ethyl, R 2 is hydrogen or methyl, R 3 is substituted or unsubstituted alkyl; ER 6 group (wherein, E is 0 or S, R 6 is unsubstituted or fluorine-substituted alkyl, and when E is zero and at the same time, R 5 is a trifluoromethyl, the R 6 is Other methylsulfonyl , Ethynesulfonyl, trifluoromethylsulfonyl, allylsulfonyl or propargylsulfonyl); NO 2 or OH; Or dialkylaminosulfonyl when R 5 is fluorine; R 3 is also C 1 -or C 2 -alkylsulfonyl, which may have 1 to 3 halogen atoms, but R 3 is not difluoromethoxy and R 4 is aquatic, methyl, ethyl, methoxy, ethoxy , Fluorine, chlorine, methylthio, ethylthio or C 1 -C 2 -haloalkoxy and R 5 is fluorine or trifluoromethyl.;The invention also relates to a process for the preparation of compound I and its use.
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