反应详情

using isopropyl 2-chloro-4-fluoro-5-{3-[2-(ethoxycarbonyl)-1-methyl-1-butenyl]ureido}-benzoate with sodium isopropylate in an isopropanol/dimethylformamide mixture there is obtained isopropyl 2-chloro-4-fluoro-5-[3,6-dihydro-5-ethyl-4-methyl-2,6-dioxo-1(2H)-pyrimidinyl]-benzoate, m.p. 176°-178° C.,