Synthesis of 4,5-Benzotropones by Cyclization of 1,3-Bis-Silyl Enol Ethers with 1,2-Dialdehydes
作者:Uwe Albrecht、Thi Hong Van Nguyen、Peter Langer
DOI:10.1021/jo049736v
日期:2004.5.1
The cyclization of 1,3-bis-silyl enol ethers or (2,4-dioxobutylidene)triphenylphosphoranes with phthalic dialdehyde allowed a convenient synthesis of a variety of 4,5-benzotropones. The hydrogenation of benzotropones afforded functionalized benzocycloheptanones which were transformed into tricyclic butenolides.
1,3-双-甲硅烷基烯醇醚或(2,4-二氧代丁烯)三苯基膦与邻苯二甲酸二醛的环化反应可以方便地合成各种4,5-苯并丙酮。苯并二氢萘酮的氢化得到官能化的苯并环庚酮,其被转化为三环丁烯内酯。