Asymmetric Synthesis of 2,2-Disubstituted Benzofuranones through an Organocatalytic Alkylation with Nitroallylic Acetates
作者:Dieter Enders、Long Zhao、Gerhard Raabe
DOI:10.1055/s-0037-1610337
日期:2019.3
Abstract The asymmetricallylic alkylation of benzofuran-3(2H)-ones with nitroallylic acetates has been achieved employing a bifunctional thiourea organocatalyst via SN2′ substitution. A series of 2,2-disubstituted benzofuranones bearing adjacent tetrasubstituted and tertiary stereocenters have been synthesized with moderate to good yields and very good stereoselectivities. The asymmetricallylic alkylation
摘要 苯并呋喃-3(2 H)-ones与硝基烯丙基乙酸酯的不对称烯丙基烷基化已经通过S N 2'取代使用双官能硫脲有机催化剂实现。已经合成了具有相邻的四取代和叔立体中心的一系列2,2-二取代的苯并呋喃酮,具有中等至良好的产率和非常好的立体选择性。 苯并呋喃-3(2 H)-ones与硝基烯丙基乙酸酯的不对称烯丙基烷基化已经通过S N 2'取代使用双官能硫脲有机催化剂实现。已经合成了具有相邻的四取代和叔立体中心的一系列2,2-二取代的苯并呋喃酮,具有中等至良好的产率和非常好的立体选择性。
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