Tetrahedron letters

Synthesis of 1, 3-dialkylimidazolium-2-carboxylates by direct carboxylation of 1, 3-dialkylimidazolium chlorides with CO 2

I Tommasi, F Sorrentino

Index: Tommasi, Immacolata; Sorrentino, Fabiana Tetrahedron Letters, 2006 , vol. 47, # 36 p. 6453 - 6456

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Citation Number: 66

Abstract

1, 3-Dialkylimidazolium-2-carboxylates 1a and 1b are obtained in good to excellent yield and selectivity by carboxylation of the corresponding 1, 3-dialkylimidazolium chloride salts with a CO2/Na2CO3 system at temperatures ranging from 80 to 135° C. The effect of temperature and reaction time on the yield and the selectivity of the carboxylation products has been studied. Coupling the CO2-based synthesis of 1, 3-dialkylimidazolium-2- ...