Dynamic Kinetic Asymmetric Transformation of Racemic Diastereomers: Diastereo‐ and Enantioconvergent Michael–Henry Reactions to Afford Spirooxindoles Bearing Furan‐Fused Rings
作者:Muhammad Sohail、Fujie Tanaka
DOI:10.1002/anie.202108734
日期:2021.9.20
Dynamic kinetic asymmetric transformation (DYKAT) reactions of racemic diastereomer mixtures that afford the products as essentially single diastereomers with high enantioselectivities are described. We demonstrated the DYKAT in the diastereo- and enantioselective synthesis of spirooxindoles bearing furan-fused rings. The starting materials of the DYKAT, dihydrobenzofuranone derivatives, were synthesized
描述了外消旋非对映异构体混合物的动态动力学不对称转化 (DYKAT) 反应,该反应提供具有高对映选择性的基本上单一的非对映异构体。我们在带有呋喃稠合环的螺吲哚的非对映选择性和对映选择性合成中证明了 DYKAT。DYKAT 的起始原料二氢苯并呋喃酮衍生物在外消旋非对映异构体混合物中合成,并在有机催化条件下通过与硝基苯乙烯的 Michael-Henry 级联反应以高产率和高非对映选择性和对映选择性转化为螺吲哚衍生物。在反应中,无论起始材料的立体化学如何,所有四种异构体都转化为具有高对映选择性的单一非对映异构体,