1: 71 percent / Na2CO3, m-chloroperbenzoic acid / CH2Cl2; H2O / 3 h / 0 °C 2: 20 percent / selenium dioxide, camphorsulfonic acid / dioxane / 1.5 h / 55 °C 3: 80 percent / pyridinium chlorochromate (PCC) / CH2Cl2 / 12 h / Ambient temperature View Scheme

1: NaH / dimethylformamide 2: 71 percent / Na2CO3, m-chloroperbenzoic acid / CH2Cl2; H2O / 3 h / 0 °C 3: 20 percent / selenium dioxide, camphorsulfonic acid / dioxane / 1.5 h / 55 °C 4: 80 percent / pyridinium chlorochromate (PCC) / CH2Cl2 / 12 h / Ambient temperature View Scheme

1: 91.5 percent / K2CO3, KI / dimethylformamide; benzene / 3 h / 85 °C 2: 91.7 percent / acetic acid / H2O / 0.5 h / Heating View Scheme

1: 84 percent / phenylisocyanate, Et3N / benzene / Ambient temperature 2: 96 percent / Li2O*H2O / methanol; H2O / 0.17 h / 0 °C 3: 68 percent / diethyldiazocarboxylate, PPh3 / tetrahydrofuran / 24 h / Ambient temperature 4: 41 percent / Mo(CO)6 / acetonitrile; H2O / 2 h / Heating 5: 48 percent / p-TsOH / methanol; various solvent(s) / 1 h / Ambient temperature View Scheme

1: 68 percent / diethyldiazocarboxylate, PPh3 / tetrahydrofuran / 24 h / Ambient temperature 2: 41 percent / Mo(CO)6 / acetonitrile; H2O / 2 h / Heating 3: 48 percent / p-TsOH / methanol; various solvent(s) / 1 h / Ambient temperature View Scheme

1: 96 percent / Li2O*H2O / methanol; H2O / 0.17 h / 0 °C 2: 68 percent / diethyldiazocarboxylate, PPh3 / tetrahydrofuran / 24 h / Ambient temperature 3: 41 percent / Mo(CO)6 / acetonitrile; H2O / 2 h / Heating 4: 48 percent / p-TsOH / methanol; various solvent(s) / 1 h / Ambient temperature View Scheme

1: 41 percent / Mo(CO)6 / acetonitrile; H2O / 2 h / Heating 2: 48 percent / p-TsOH / methanol; various solvent(s) / 1 h / Ambient temperature View Scheme