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Indexed by:期刊论文

Date of Publication:2008-11-10

Journal:TETRAHEDRON LETTERS

Included Journals:SCIE、Scopus

Volume:49

Issue:46

Page Number:6589-6592

ISSN No.:0040-4039

Abstract:A catalyst systern containing an electrophilic center and a sterically hindered nUcleophilic center in one molecule was applied to the cycloaddition reaction of CO2 and epoxides. This intramolecularly two-centered cooperation catalyst showed activity even at a high [epoxide]/[catalyst] ratio up to 50000 under mild conditions such as solvent-free, ambient temperature, and low CO2 pressure. The reaction of CO2 with (S)-propylene oxide at 80 degrees C in the presence of the bifunctional catalyst gives (S)-propylene carbonate in 96% ee with retention of stereochemistry. (C) 2008 Elsevier Ltd. All rights reserved,