sodium carbonate in chloroform

1: fuming nitric acid, aq. acetic acid / 24 h / steam bath 2: 73 percent / sodium dithionite / methanol; aq. NH3 / 1.) 30 min, 2.) refrigerator, 1 h 3: 65 percent / sodium carbonate / CHCl3 View Scheme

1: 73 percent / sodium dithionite / methanol; aq. NH3 / 1.) 30 min, 2.) refrigerator, 1 h 2: 65 percent / sodium carbonate / CHCl3 View Scheme