Organocatalytic Asymmetric Michael Addition of Oxazolones to Arylsulfonyl Indoles: Facile Access to<i>syn</i>-Configured α,β-Disubstituted Tryptophan Derivatives
作者:Chang-Wu Cai、Xing-Li Zhu、Song Wu、Zong-Le Zuo、Liang-Liang Yu、Da-Bin Qin、Quan-Zhong Liu、Lin-Hai Jing
DOI:10.1002/ejoc.201201335
日期:2013.1
Enantioselective Michael addition of oxazolones to in situ generated vinylogous imine intermediates is reported. A series of optically active 3-alkylindole derivatives with adjacent quaternary and tertiary stereocenters was obtained. The resulting adducts can readily be converted into syn-configured α,β-disubstituted tryptophan derivatives without compromising the stereoselectivities.
报道了恶唑酮对原位生成的乙烯基亚胺中间体的对映选择性迈克尔加成。获得了一系列具有相邻季和叔立体中心的光学活性 3-烷基吲哚衍生物。所得加合物可以很容易地转化为顺式构型的 α,β-二取代色氨酸衍生物,而不会影响立体选择性。