2008

Urea derivativesP 0490 Solvent-Free Synthesis of Substituted Ureas from CO2 and Amines with a Func-

tional Ionic Liquid as the Catalyst. — Aliphatic amines, cyclohexylamine, and ben-zylamine,(I), are converted into ureas (III) with moderate yields and high selectivity without solvent and dehydrating agents in the presence of a basic ionic liquid. The use of organic solvents does not improve the yield of the carbonylation significantly. No by-products are detected in the reaction mixture and the ionic liquid is reusable after simple separation. — (JIANG*, T.; MA, X.; ZHOU, Y.; LIANG, S.; ZHANG, J.; HAN*, B.; Green Chem. 10 (2008) 4, 465-469; Beijing Natl. Lab. Mol. Sci., Inst. Chem., Chin. Acad. Sci., Beijing 100080, Peop. Rep. China; Eng.) — H. Hoennerscheid

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