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Org Biomol Chem. 2014 Aug 28;12(32):6085-8. doi: 10.1039/c4ob01039f. Epub 2014 Jul 8.

Highly enantioselective synthesis of bisoxindoles with two vicinal quaternary stereocenters via Lewis base mediated addition of oxindoles to isatin-derived ketimines.

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  • 1State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210093, P.R. China. cjzhu@nju.edu.cn wzheng@nju.edu.cn.

Abstract

A highly efficient asymmetric organocatalytic addition of 3-substituted oxindole to isatin-derived ketimine is reported with excellent stereocontrol (>99 : 1 dr, >99% ee) under mild conditions. This method provides access to the bisoxindole structure moiety with two vicinal quaternary stereogenic centers.

PMID:
25004112
[PubMed]
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