作者:En Si Wang、Yuen Min Choy、Henry N.C. Wong
DOI:10.1016/0040-4020(96)00705-3
日期:1996.9
Michael addition as a pivotal step, butenolide 5, furans 6 and 7 have been converted to dioxaspiro compounds 8, 9, 10 and 11, whose heterocyclic frameworks constitute important structural units of prehispanolone (2) as well as 14,15-dihydroprehispanolones (3) and (4), respectively. Hispanolone (1) was converted to 2, 3 and 4 by utilizing a similar strategy.
利用分子内迈克尔加成法作为关键步骤,丁烯内酯5,呋喃6和7已转化为二氧杂螺环化合物8、9、10和11,它们的杂环骨架构成了prehispanolone(2)以及14,15-的重要结构单元。二氢普hi烷酮(3)和(4)。通过使用类似的策略,将史帕诺龙(1)转换为2、3和4。