Multi-step reaction with 8 steps
1: Et3N / tetrahydrofuran / 1.) 0 deg C, 1 h, 2.) RT, 12 h
2: 74 percent / Et3N, HOBt, DCC / tetrahydrofuran / 0 °C
3: 94 percent / Pd(PPh3)4, morpholine / tetrahydrofuran / 0.5 h / Ambient temperature
4: 94 percent / HOBt, EDC / CH2Cl2 / 24 h / Ambient temperature
5: 65 percent / lipase from Mucor miehei, KI / methanol / 12 h / 37 °C
6: 80 percent / HOBt, EDC / CH2Cl2 / 24 h / Ambient temperature
7: 48 percent / lipase from Mucor miehei, KI / methanol / 12 h / 37 °C
8: 61 percent / HOBt, EDC / dimethylformamide / 12 h / Ambient temperature
With
morpholine; tetrakis(triphenylphosphine) palladium(0); lipase from Mucor miehei; benzotriazol-1-ol; N-(3-dimethylaminopropyl)-N-ethylcarbodiimide; triethylamine; dicyclohexyl-carbodiimide; potassium iodide;
In
tetrahydrofuran; methanol; dichloromethane; N,N-dimethyl-formamide;
DOI:10.1021/ja9805627