Issue 9, 2016

Catalytic asymmetric chemoselective 1,3-dipolar cycloadditions of an azomethine ylide with isatin-derived imines: diastereo- and enantioselective construction of a spiro[imidazolidine-2,3′-oxindole] framework

Abstract

A catalytic asymmetric chemoselective 1,3-dipolar cycloaddition (1,3-DC) of an azomethine ylide with imines has been established via a three-component reaction of isatin-derived imines, aldehydes and an amino-ester in the presence of chiral phosphoric acid, which efficiently constructed biologically important spiro[imidazolidine-2,3′-oxindole] frameworks in good yields, and with high diastereo- and enantioselectivities (up to 76% yield, 97 : 3 er, all >95 : 5 dr). This reaction not only realized a catalytic asymmetric chemoselective 1,3-DC of an azomethine ylide, but also represented the first enantioselective construction of a spiro[imidazolidine-2,3′-oxindole] skeleton.

Graphical abstract: Catalytic asymmetric chemoselective 1,3-dipolar cycloadditions of an azomethine ylide with isatin-derived imines: diastereo- and enantioselective construction of a spiro[imidazolidine-2,3′-oxindole] framework

Supplementary files

Article information

Article type
Communication
Submitted
22 Sep 2015
Accepted
26 Oct 2015
First published
26 Oct 2015

Chem. Commun., 2016,52, 1804-1807

Catalytic asymmetric chemoselective 1,3-dipolar cycloadditions of an azomethine ylide with isatin-derived imines: diastereo- and enantioselective construction of a spiro[imidazolidine-2,3′-oxindole] framework

Y. Wang, H. Zhang, C. Li, T. Fan and F. Shi, Chem. Commun., 2016, 52, 1804 DOI: 10.1039/C5CC07924A

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