反应详情

using isopropyl 2-chloro-4-fluoro-5-{3-[2-(ethoxycarbonyl)-1-methylpropenyl]ureido}-benzoate with sodium isopropylate in an isopropanol/dimethylformamide mixture there is obtained isopropyl 2-chloro-4-fluoro-5-[3,6-dihydro-4,5-dimethyl-2,6-dioxo-1(2H)-pyrimidinyl]-benzoate, m.p. 155°-157° C.,