Issue 10, 2013

Asymmetric cycloaddition of CO2 and an epoxide using recyclable bifunctional polymeric Co(iii) salen complexes under mild conditions

Abstract

Bifunctional polymeric Co(III) salen complexes 1a–g derived from (1R,2R)-(−)-1,2-diaminocyclohexane and a triazine–piperazine core were synthesized and screened for the asymmetric cycloaddition reaction of CO2 and an epoxide under mild conditions. A moderate Krel value of 11.2 for the product propylene carbonate (ee = 74%) was obtained with catalyst 1e which does not require any external base as the co-catalyst. The polymeric Co(III)–CCl3COO (1e) was efficiently recycled 10 times without any significant loss in activity under the present reaction conditions.

Graphical abstract: Asymmetric cycloaddition of CO2 and an epoxide using recyclable bifunctional polymeric Co(iii) salen complexes under mild conditions

Supplementary files

Article information

Article type
Paper
Submitted
10 May 2013
Accepted
12 Jun 2013
First published
13 Jun 2013

Catal. Sci. Technol., 2013,3, 2661-2667

Asymmetric cycloaddition of CO2 and an epoxide using recyclable bifunctional polymeric Co(III) salen complexes under mild conditions

T. Roy, R. I. Kureshy, N. H. Khan, S. H. R. Abdi and H. C. Bajaj, Catal. Sci. Technol., 2013, 3, 2661 DOI: 10.1039/C3CY00325F

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