Vinylogous Reactivity of Cyclic 2‐Enones: Organocatalysed Asymmetric Addition to 2‐Enals to Synthesize Fused Carbocycles
作者:Manolis Sofiadis、Dimitris Kalaitzakis、John Sarris、Tamsyn Montagnon、Georgios Vassilikogiannakis
DOI:10.1002/anie.201901902
日期:2019.5.13
A method for asymmetric and site selective annulations at the γ and γ′ positions of cyclic 2‐enones with α,β‐unsaturated aldehydes has been developed. The organocatalysed [3+3]‐annulations proceed with high levels of regio‐, diastereo‐, and enantioselectivity, affording a series of high value fused carbocycles. Further elaboration gave key lactones (both bridged and fused).
已开发出一种在α2-β-不饱和醛的环状2-烯酮的γ和γ′位置进行不对称和选择性环空的方法。有机催化的[3 + 3]环化具有高水平的区域,非对映和对映选择性,从而提供了一系列高价值的融合碳环。进一步加工得到关键的内酯(桥连和融合)。