Asymmetric annulations based on cycloisomerization of cyclopropyl tethered allenyl ketones by bimetallic relay catalysis
作者:Jun He、Wen Liu、Jing Zhang、Ziwei Zhong、Lili Lin、Xiaoming Feng
DOI:10.1007/s11426-023-1667-9
日期:2023.10
The diastereo- and enantioselective tandem cycloisomerization/[4 + 2]-cycloaddition reaction of cyclopropyl tethered allenyl ketones with α,β-unsaturated carbonyl compounds was realized firstly under mild reaction conditions by using bimetallic silver (I)/chiral metal-N,N′-dioxide catalysts, providing a facile and atom-economic route to enantioenriched polysubstituted furopyran derivatives with good
利用双金属银(I)/手性金属-N,N在温和的反应条件下首次实现了环丙基系联烯基酮与α,β-不饱和羰基化合物的非对映和对映选择性串联环异构化/[4 + 2]-环加成反应'-二氧化物催化剂,为对映体富集的多取代呋喃吡喃衍生物提供了一种简便且原子经济的路线,并取得了良好的结果。提出了可能的过渡态模型来解释立体诱导。