反应详情

using ethyl 2-chloro-5-{1,2,5,7-tetrahydro-2,4-dioxo-thieno[3,4-d]pyrimidin-3(4H)-yl}-benzoate in dimethylformamide there is obtained ethyl 2-chloro-5-{1,2,5,7-tetrahydro-1-methyl-2,4-dioxo-thieno[3,4-d]pyrimidin-3(4H)-yl}-benzoate, m.p. 203°-206° C.,