Stereoselective synthesis of spirocyclic oxindoles based on a one-pot Ullmann coupling/Claisen rearrangement and its application to the synthesis of a hexahydropyrrolo[2,3-b]indole alkaloid
作者:Hiroshi Miyamoto、Tomohiro Hirano、Yoichiro Okawa、Atsuo Nakazaki、Susumu Kobayashi
DOI:10.1016/j.tet.2013.08.057
日期:2013.11
efficient and convenient approach to the synthesis of spirocyclic oxindoles from iodoindoles has been developed. The most striking feature of this approach is that the sequential intramolecular Ullmann coupling and Claisen rearrangement proceeds in a one-pot manner to afford 3-spiro-2-oxindoles in good yield with excellent diastereoselectivity. Application of this one-pot reaction to chiral non-racemic
已经开发了从碘吲哚合成螺环氧吲哚的有效且方便的方法。该方法最显着的特征是,分子内乌尔曼偶合和克莱森重排以一锅法进行,从而以良好的非对映选择性很好地提供了3-螺-2-氧吲哚。一锅法反应在手性非外消旋叔醇底物上的应用导致手性完全转移到螺环季碳上。使用该方法,完成了(-)-去溴氟乙胺B的不对称全合成。