2-ketopropanoic acid 2-(6,6-dimethyl-4-oxo-3-phenyl-5,6-dihydro-8H-thiopyrano[4',3':4,5]thieno[2,3-d]pyrimidyl) hydrazone 在
溶剂黄146 作用下,
反应 14.0h,
以90%的产率得到2,8,8-trimethyl-1,6-dioxo-5-phenyl-7,8-dihydro-10H-thiopyrano[4'',3'':4',5']thieno[2',3':4,5]pyrimido[2,3-c]-1,2,4-triazine