7-ethyl-3-phenyl-5,6,7,8-tetrahydropyrido[4',3':4,5]thieno[2,3-d]pyrimidin-4(3H)-one 、
丁炔二酸二甲酯 以
乙腈 为溶剂,
反应 168.0h,
以18%的产率得到dimethyl 1-ethyl-6'-methylidene-4'-oxo-3'-phenyl-3',4',5,6-tetrahydro-1H-spiro[pyridine-4,5'-thieno[2,3-d]pyrimidine]-2,3-dicarboxylate