1: CCl4, tris(dimethylamino)phosphane / tetrahydrofuran / 2 h / -78 °C 2: 65 percent / KOH / tris<2-(2-methoxyethoxy)ethyl>amine / tetrahydrofuran 3: 68 percent / 10percent aq.CF3COOH 4: 81 percent / 80percent 3-chloroperbenzoic acid / methanol / 2 h / Ambient temperature 5: 75 percent / NH3 / methanol / 12 h / 50 °C View Scheme

1: CCl4, tris(dimethylamino)phosphane / tetrahydrofuran / 2 h / -78 °C 2: 65 percent / KOH / tris<2-(2-methoxyethoxy)ethyl>amine / acetonitrile; tetrahydrofuran / 20 h View Scheme

1: CCl4, tris(dimethylamino)phosphane / tetrahydrofuran / 0.5 h / 67 °C 2: 46 percent / KOH / tris<2-(2-methoxyethoxy)ethyl>amine / tetrahydrofuran / 26 h 3: 72 percent / 90percent aq.CF3COOH View Scheme

1: CCl4, tris(dimethylamino)phosphane / tetrahydrofuran / 2 h / -78 °C 2: 65 percent / KOH / tris<2-(2-methoxyethoxy)ethyl>amine / tetrahydrofuran 3: 68 percent / 10percent aq.CF3COOH View Scheme

1: CCl4, tris(dimethylamino)phosphane / tetrahydrofuran / 2 h / -78 °C 2: 65 percent / KOH / tris<2-(2-methoxyethoxy)ethyl>amine / acetonitrile; tetrahydrofuran / 20 h 3: 89 percent / 90percent aq.CF3COOH / 1 h / Ambient temperature View Scheme