1,2,3,5,6,7,8,9-octahydro-2-thioxo-4H-cyclohepta[4,5]thieno[2,3-d]pyrimidin-4-one 、 alkaline earth salt of/the/ methylsulfuric acid 在
sodium ethanolate 作用下,
以
乙醇 为溶剂,
以73%的产率得到ethyl 1-(p-chlorophenyl)-5-oxo-5,6,7,8,9,10-hexahydro-1H-cyclohepta[4,5]thieno[2,3-d][1,2,4]triazolo[4,3-a]pyrimidin-3-carboxylate