1: 69 percent / sodium borohydride / ethanol / 0.5 h / Ambient temperature 2: 85 percent / H2 / platinum oxide / ethyl acetate / 48 h / 12928.7 Torr 3: 73.8 percent / acetone / 69 h / Heating 4: methanol / 0.25 h / Irradiation View Scheme

1: 69 percent / sodium borohydride / ethanol / 0.5 h / Ambient temperature 2: 85 percent / H2 / platinum oxide / ethyl acetate / 48 h / 12928.7 Torr 3: 73.8 percent / acetone / 69 h / Heating 4: 2.) sodium borohydride / 1.) methanol, irradiation, 3 h, 2.) 98percent aq. EtOH, heating View Scheme

1: 69 percent / sodium borohydride / ethanol / 0.5 h / Ambient temperature 2: 85 percent / H2 / platinum oxide / ethyl acetate / 48 h / 12928.7 Torr 3: 73.8 percent / acetone / 69 h / Heating 4: 2.) sodium borohydride / 1.) methanol, irradiation, 3 h, 2.) 98percent aq. EtOH, heating View Scheme