期刊
EUROPEAN JOURNAL OF ORGANIC CHEMISTRY
卷 2013, 期 11, 页码 2071-2075出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/ejoc.201300081
关键词
Asymmetric synthesis; Organocatalysis; Michael addition; Domino reactions; Cascade reaction; Cyclization; Spiro compounds
A formal [3+2] cycloaddition involving the organocatalytic asymmetric Michael addition/cyclization cascade reaction of ylideneoxindoles with isothiocyanato oxindoles was developed. This method allows efficient and rapid synthesis of highly functionalized bispirooxindole products bearing three contiguous stereogenic centers with two quaternary stereocenters in almost quantitative yields with extremely high enantio- and diastereoselectivities.
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