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胺和 N -苄基氨基甲酸 - 4-硝基苯酯 ,在 CH2 Cl2 中 ,加三乙胺反应 2 0～ 5 0 min(1例为 6 h) ,所得产物续经 Pd催化加氢还原成相应的单取代脲。总收率 6例 83%～ 96 %由胺制备单取代脲的简便方法@金卫东
Amine and N - benzylcarbamic acid - 4 - nitrophenyl ester in CH2 Cl2, add triethylamine reaction 20 ~ 50 min (1 case for 6 h), the resulting continued Pd-catalyzed hydrogenation was reduced to The corresponding monosubstituted urea. Total yield of 6 cases 83% ~ 96% simple preparation of monosubstituted urea by amine method Kim Wendong