反应详情

using isopropyl 2-chloro-4-fluoro-5-{3-[2-(methoxycarbonyl)-4,5-dihydro-thien-3-yl]ureido}-benzoate with sodium isopropylate in an isopropanol/dimethylformamide mixture there is obtained isopropyl 2-chloro-4-fluoro-5-{1,4,6,7-tetrahydro-2,4-dioxo-thieno[3,2-d]pyrimidin-3(2H)-yl}-benzoate, m.p. 252°-254° C.,