Efficient Synthesis of Functionalized 4,5-Benzotropones by Regioselective Cyclization of 1,3-Bis(trimethylsilyloxy)-1,3-butadienes with Phthalic Dialdehyde
作者:Peter Langer、Uwe Albrecht
DOI:10.1055/s-2001-12330
日期:——
The reaction of 1,3-bis(trimethylsiloxy)-1,3-butadienes with phthalic dialdehyde resulted in regioselective formation of functionalized 4,5-benzotropones.
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-silylenolethers 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.