Copper-Catalyzed Enantioselective Hetero-Diels–Alder Reaction of Danishefsky’s Diene with β,γ-Unsaturated α-Ketoesters
作者:Yanbin Hu、Kun Xu、Sheng Zhang、Fengfeng Guo、Zhenggen Zha、Zhiyong Wang
DOI:10.1021/ol5015009
日期:2014.7.3
A highly enantioselective hetero-Diels–Alder reaction of Danishefsky’s diene with β,γ-unsaturatedα-ketoesters was developed for the first time by virtue of chiral copper complexes. This protocol provided a facile access to optically active dihydropyranones bearing a quaternary center with high enantioselectivities and good yields. Furthermore, on the basis of the isolated intermediate analysis, the