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The synthesis of methyl N-phenyl carbamate (MPC), the key intermediate for the non-phosgene synthesis of isocyanates based on CO 2 , was studied from the reaction of dimethyl carbonate and N,N′-diphenyl urea under pressure. A variety of solid catalysts were screened, which showed lead compounds such as PbO, PbO 2 , PbCO 3 , and 2PbCO 3 ·Pb(OH) 2 had excellent...
Synthesis of methyl N-phenyl carbamate from dimethyl carbonate and 1,3-diphenyl urea was investigated under atmospheric pressure. The results showed that homogenous catalyst sodium methoxide had the excellent activity to efficiently catalyze the synthesis of methyl N-phenyl carbamate under atmospheric pressure.
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