1: 84 percent / 1 M tetra-n-butylammonium fluoride / tetrahydrofuran 2: 66 percent / H2 / 10percent Pd/C / methanol / 6 h / 1551.4 Torr 3: 96 percent / ammonia / methanol / 12 h / 50 - 55 °C / in a pressure vessel View Scheme

1: 84 percent / 1 M tetra-n-butylammonium fluoride / tetrahydrofuran 2: 81 percent / ammonia / methanol / 12 h / 50 - 55 °C / in a pressure vessel View Scheme

With  2,2'-azo-bisisobutyronitrile; tri-n-butyl-tin hydride in  benzene T=60 - 65°C;   

With  2,2'-azo-bisisobutyronitrile; tri-n-butyl-tin hydride in  benzene T=60 - 65°C;   

With  1,3-dimethyl-2-phenyl-1,3,2-diazaphospholidine 3 h;  Ambient temperature;   

With  tetrabutyl ammonium fluoride in  tetrahydrofuran