Application of Dearomatization Strategy on the Synthesis of Furoquinolinone and Angelicin Derivatives
摘要:
The oxidative dearomatization of 3-(3-alkynyl-4-hydroxyphenyl)propanoic acid is combined with a cascade transition-metal catalyzed cyclization/addition/aromatization/lactamization sequence, which provides a novel approach to prepare furoquinolinone and angelicin derivatives in a convergent and efficient manner.
Dearomatization-Induced Cycloaddition and Aromatization-Triggered Rearrangement: Synthesis of Vertically Expanded Five-Ring Fused Benzofurans
作者:Dandan Han、Jinjin Chen、Qiuqin He、Renhua Fan
DOI:10.1021/acs.orglett.6b02329
日期:2016.9.16
developed for the efficient construction of vertically expanded five-ring fused benzofurans from ortho-alkynylphenols and ortho-alkynylarylaldimines. The stepwise procedure comprises a dearomatization-induced silver-catalyzed [3 + 2] cycloaddition followed by an aromatization-triggered ytterbium-catalyzed rearrangement.