“…For example, rhodium-catalyzed hydrogenation of carbon monoxide to ethylene glycol under very high pressure (p(H 2 ) = 200 bar) and at elevated temperature (200 8C) using N,N,N',N'-tetramethylurea (TMU) as an inert solvent was reported. [4] In addition, sugar-urea-salt melts were used as "green solvents" for Rh-catalyzed hydrogenation reactions and found to be sustainable reaction media. [5] Notably, alkyl and aryl urea compounds are readily synthesized from reactions of amines with CO 2 in the presence of various catalysts, such as 1,8-diazabicyclo-[5.4.0]undec-7-ene, [6] CsOH, [7] Cs 2 CO 3 , [8] Au/polymers, [9] [Bmim]OH [10] or KOH/PEG1000, [11] and by using ionic liquids, N-methylpyrrolidone, and supercritical carbon dioxide as solvents.…”