Purification / work up;

silica gel; pyridinium chlorochromate in dichloromethane T=20°C; 2 h; Sonication;

1: 67 percent / LAH / diethyl ether / 14 h / 25 °C / Heating 2: 94 percent / 12 h / 25 °C 3: 99 percent / pyridine / 0.5 h / 25 °C 4: conc. NH4OH 5: conc. NH4OH View Scheme

lithium aluminium tetrahydride in diethyl ether T=25°C; Reduction; 14 h; Heating;