hydrogenchloride Heating;

1: 61 percent / 6 N HCl / Heating 2: COCl2, DMF / CH2Cl2 / 2 h / Ambient temperature 3: 1) n-BuLi, bipyridyl / 1) THF, -35 -> -5 deg C, 2) THF, -78 deg C, 1 h 4: 98 percent / acetic anhydride / 3 h / Heating 5: ethanol / a) 5 - 15 deg C, 90 min, b) 2 h , room temp. 6: 1) 60percent NaH, 2) 6 M HCl / 1) THF, room temp., 2) reflux, 3 h View Scheme