sodium tetrahydroborate in methanol 0.5 h;

formic acid; potassium carbonate

1: 52 percent / 20percent HCl / 16 h / Ambient temperature; other derivatives 2: 76 percent / NaBH4 / methanol / 0.5 h View Scheme

1: 87 percent / sodium hydrogencarbonate / 8 h / 130 °C 2: 1.) butyllithium / 1.) hexane, ether, 48 h, 25 deg C, 2.) 30 min., 25 deg C 3: 52 percent / 20percent HCl / 16 h / Ambient temperature; other derivatives 4: 76 percent / NaBH4 / methanol / 0.5 h View Scheme