1: 90 percent / morpholine, tetrakis(triphenylphosphine)palladium / tetrahydrofuran / 1 h / 23 °C 2: 74 percent / 4-dimethylaminopyridine, 1,3-dicyclohexylcarbodiimide / CH2Cl2 / 1.) 0 deg C, 1 h, 2.) 23 deg C, 16 h 3: CH2Cl2 / 2 h / 23 °C 4: 32 mg / pentafluorophenyl diphenylphosphinate, diisopropylethylamine / dimethylformamide / 16 h / 23 °C 5: 26 mg / m-chloroperoxybenzoic acid / CH2Cl2 / 23 °C View Scheme