1: 50.38 percent / polyphosphoric acid / 4 h / 100 °C 2: 82.25 percent / LAH / tetrahydrofuran / a) 0 deg C, 2 h, b) reflux, 6 h 3: 16.66 percent / Pd-C (10percent) / 22 h / 380 - 390 °C View Scheme