Wk. Su et Ym. Zhang, The preparation of 3-substituted 1-chlorocarbonyl-imidazolidin-2-ones using bis(trichloromethyl) carbonate, J CHEM R-S, (9), 2000, pp. 440-441
A novel synthesis of 3-substituted 1-chlorocarbonyl-imidazolidin-2-ones usi
ng bis(trichloromethyl) carbonate is reported. The bis(trichloromethyl)carb
onate is used to generate phosgene in situ in stoichiometric amounts. The y
ields and purity of the products obtained are better than those obtained by
a conventional way using phosgene.