A new approach to linear tetracycles via Michael reactions of quinizarinquinone with O-silylated ketene acetals
作者:Kenji Hayakawa、Mariko Aso、Ken Kanematsu
DOI:10.1039/c39870000102
日期:——
The Michael-type reaction of quinizarinquinone and 1-ethoxy-1-(trimethylsiloxy)buta-1,3-diene followed by Lewis acid-catalysed [1,5] sigmatropic rearrangement and Friedel–Crafts cyclisation provides a new route to variously functionalized tetracycles.