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Hydroxy‐Functionalized Imidazolium Bromides as Catalysts for the Cycloaddition of CO 2 and Epoxides to Cyclic Carbonates
Author(s) -
Anthofer Michael H.,
Wilhelm Michael E.,
Cokoja Mirza,
Drees Markus,
Herrmann Wolfgang A.,
Kühn Fritz E.
Publication year - 2015
Publication title -
chemcatchem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.497
H-Index - 106
eISSN - 1867-3899
pISSN - 1867-3880
DOI - 10.1002/cctc.201402754
Subject(s) - cycloaddition , catalysis , chemistry , epoxide , hydrogen , reaction conditions , organic chemistry , polymer chemistry , medicinal chemistry
Hydroxy‐functionalized mono‐ and bisimidazolium bromides were synthesized and applied as catalysts for the cycloaddition of CO 2 and epoxides to cyclic carbonates. A catalyst screening showed the influence of the number of protic hydrogen atoms at the cation for the activation of epoxides. The most active catalyst operates at very mild reaction conditions (70 °C, 0.4 MPa CO 2 ) and can be easily recycled ten times without loss of activity.