pyridine 13 h; Ambient temperature;

sodium dithionite in methanol; ammonium hydroxide 1.) 30 min, 2.) refrigerator, 1 h;

1: 77 percent / sodium dithionite / methanol; aq. NH3 / 1.) 30 min, 2.) refrigerator, 1 h 2: 96 percent / potassium bicarbonate / CHCl3 / 24.5 h / Ambient temperature View Scheme

1: 77 percent / sodium dithionite / methanol; aq. NH3 / 1.) 30 min, 2.) refrigerator, 1 h 2: 93 percent / sodium acetate / acetic acid View Scheme