PROCESS FOR PREPARATION OF SULFONILUREA DERIVATIVES

摘要

Sulfonylurea derivative of formula(I) is prepared by reacting carbamate cpd.. of formula(VII) with pentachloro phosphine in the presence or absence of a solvent, and then reacting the obtd. cpd. with pyrimidine derivative of formula(V). In the formula, R1 is H and alkyl group of C1-C4 or phenyl group; R2 is H and alkyl group of C1-C4, aryl or propanyl group; R3 is H and methyl, ethyl or phenyl group; L is alkyl group of C1-C8 and alkyl ether, aryl or phenyl group.