Bimetallic Catalytic Tandem Reaction of Acyclic Enynones: Enantioselective Access to Tetrahydrobenzofuran Derivatives
作者:Shulin Ge、Yongyan Zhang、Zheng Tan、Dawei Li、Shunxi Dong、Xiaohua Liu、Xiaoming Feng
DOI:10.1021/acs.orglett.0c00984
日期:2020.5.1
A highly efficient enantioselective synthesis of multisubstituted tetrahydrobenzofuran derivatives with four contiguous stereocenters was established by the dual catalysis of a gold(I)/chiral N,N'-dioxide-cobalt(II) complex via a tandem cycloisomerization/Diels-Alder reaction of 2-alkynyl-2-alkenones and electron-deficient olefins. This strategy was not only featured with atom economy, remarkable efficiency
金(I)/手性N,N'-二氧化物-钴(II)配合物通过串联环异构化/ Diels-Alder反应2催化双催化建立了具有四个连续立体中心的多取代四氢苯并呋喃衍生物的高效对映选择性合成-炔基-2-烯酮和缺电子的烯烃。该策略不仅具有原子经济性,显着的效率和立体选择性,而且还通过将呋喃基产物进一步转化为多环分子而得到突出。此外,提出了一种可能的过渡态模型以阐明立体选择性的起源。