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CeO2 showed higher activity for the direct synthesis of 1,3-dibutylurea (DBU) from CO2 and n-butylamine than the metal oxides tested. The solvent largely influenced the reaction over CeO2, and N-methylpyrrolidone (NMP) was preferable among various solvents tested from the viewpoints of activity and selectivity. The catalyst system composed of CeO2 catalyst and NMP solvent (CeO2 in NMP) was applicable...
Highly selective synthesis of 2-oxazolidinone from CO 2 and 2-aminoethanol in acetonitrile solvent was achieved over heterogeneous CeO 2 catalyst. Yield of 2-oxazolidinone reached 97% at 97% 2-aminoethanol conversion with >99% 2-aminoethanol-based selectivity in the optimized reaction conditions. Various aminoalcohols were converted to the corresponding cyclic carbamates in high...
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