Various 1,3-disubstituted 2,3-dihydroimidazol-2-ones are readily prepared by the reaction of N,N′-disubstituted ureas with vicinal-diols in the presence of a catalytic amount of ruthenium complex in fair to good yields.
T. Kondo, S. Kotachi and Y. Watanabe, J. Chem. Soc., Chem. Commun., 1992, 1318 DOI: 10.1039/C39920001318
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