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Simple, clean, safe, reproducible, and practical describes the synthesis of disubstituted urea derivatives, which are effectively synthesized from amines and carbon dioxide with a CsOH/ionic‐liquid catalyst system. The products are easily separated and the catalytic system can be reused without deactivation (see picture).

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Several acid functional ionic liquids, in which cations possess two adjacent acid sites, were synthesized and used for the acetalization of aldehydes with good catalytic performance under mild reaction conditions.

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Simpel, sauber, sicher: Disubstituierte Harnstoffderivate lassen sich effizient aus Aminen und CO2 synthetisieren mit einem Katalysatorsystem aus CsOH in einer ionischen Flüssigkeit (IL). Die Produkte sind leicht abtrennbar, und das Katalysatorsystem kann ohne Desaktivierung wiederverwendet werden (siehe Bild).