1: 91 percent / bromine, anhydreous sodium acetate / acetic acid / roomtemp., 1 h, then 15 min heating 3: 95 percent / 50percent sulphuric acid / acetic acid / reflux, 8h, then room temp. 4: 1) thionylchloride, 2) conc. ammonia / 1) benzene, reflux, 2) ether, 30 min View Scheme

1: 95 percent / 50percent sulphuric acid / acetic acid / reflux, 8h, then room temp. 2: 1) thionylchloride, 2) conc. ammonia / 1) benzene, reflux, 2) ether, 30 min View Scheme

2: 95 percent / 50percent sulphuric acid / acetic acid / reflux, 8h, then room temp. 3: 1) thionylchloride, 2) conc. ammonia / 1) benzene, reflux, 2) ether, 30 min View Scheme

ammonium hydroxide; thionyl chloride 1) benzene, reflux, 2) ether, 30 min; Yield given. Multistep reaction;