lithium aluminium tetrahydride in tetrahydrofuran 1.) RT, overnight, 2.) reflux, 1 h;

1: 80 percent / H2, triethylamine / Raney cobalt / dimethylformamide / 23 h / 124116 - 279260 Torr 2: 76.2 percent / H2O / 1.) RT, overnight, 2.) from RT to 220 deg C, 1 h 3: 1.) NaH / 1.) DMF, 1 h, 2.) RT, overnight 4: lithium aluminum hydride / tetrahydrofuran / 1.) RT, overnight, 2.) reflux, 1 h View Scheme

1: 1.) NaH / 1.) DMF, 1 h, 2.) RT, overnight 2: lithium aluminum hydride / tetrahydrofuran / 1.) RT, overnight, 2.) reflux, 1 h View Scheme

1: 76.2 percent / H2O / 1.) RT, overnight, 2.) from RT to 220 deg C, 1 h 2: 1.) NaH / 1.) DMF, 1 h, 2.) RT, overnight 3: lithium aluminum hydride / tetrahydrofuran / 1.) RT, overnight, 2.) reflux, 1 h View Scheme