1: 55 percent / 8 h / 170 °C 2: 2.) NaBH4 / 1.) reflux, 15 h; 2.) 90percent ethanol 3: 2.) basic ion exchange resin / 1.) acetone, heating, 8 h; 2.) 80percent ethanol, 48 h View Scheme

1: 55 percent / 8 h / 170 °C 2: 2.) NaBH4 / 1.) reflux, 15 h; 2.) 90percent ethanol 3: 2.) basic ion exchange resin / 1.) acetone, heating, 8 h; 2.) 80percent ethanol, 48 h View Scheme

1: 2.) NaBH4 / 1.) reflux, 15 h; 2.) 90percent ethanol 2: 2.) basic ion exchange resin / 1.) acetone, heating, 8 h; 2.) 80percent ethanol, 48 h View Scheme

basic ion exchange resin 1.) acetone, heating, 8 h; 2.) 80percent ethanol, 48 h; Yield given. Multistep reaction;