Sequential One-Pot Synthesis of 5,6,8-Trihydropyrano[3',4':4,5]thieno[2,3-d]pyrimidin-4(3H)-one
Chen Li, Sun Shaofa, Song Gongwu
Chin. J. Org. Chem. . 2012, (07): 1314 -1318 .  DOI: DOI: 10.6023/cjoc1111172