Synthesis of 4,5-benzotropones by cyclization of 1,3-bis-silyl enol ethers with 1,2-dialdehydes

被引:23
作者
Albrecht, U [1 ]
Nguyen, THV [1 ]
Langer, P [1 ]
机构
[1] Univ Greifswald, Inst Chem & Biochem, Soldmannstr 16, D-17487 Greifswald, Germany
关键词
D O I
10.1021/jo049736v
中图分类号
O62 [有机化学];
学科分类号
070303 ; 081704 ;
摘要
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.
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页码:3417 / 3424
页数:8
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