1.1: NH3 2.1: dimethylformamide / 60 °C 2.2: polymer-supported HOBt; PyBrOP / dimethylformamide 2.3: isocyanate resin / tetrahydrofuran View Scheme

1: triethylamine; bromo-tris(1-pyrrolidinyl)phosphonium hexafluorophosphate / 1,2-dichloro-ethane / 0.33 h / 120 °C / Microwave irradiation 2: ammonia / 1,4-dioxane; water / 72 h / 20 °C View Scheme

1.1: NH3 2.1: dimethylformamide / 60 °C 2.2: polymer-supported HOBt; PyBrOP / dimethylformamide 2.3: isocyanate resin / tetrahydrofuran 3.1: 100 percent / NaOEt / ethanol / 0.17 h / 120 °C / microwave irradiation View Scheme

1: triethylamine; bromo-tris(1-pyrrolidinyl)phosphonium hexafluorophosphate / 1,2-dichloro-ethane / 0.33 h / 120 °C / Microwave irradiation 2: ammonia / 1,4-dioxane; water / 72 h / 20 °C 3: sodium ethanolate / ethanol / 0.17 h / 120 °C / Microwave irradiation View Scheme

ammonia ammonolysis; transesterification;