1: 8-quinolinesulfonyl chloride / 1) pyridine, 6h room temperature 2) pyridine, 24h room temperature 2: p-toluenesulfonic acid / CH2Cl2; methanol / 0.25 h / 0 °C 3: 1) ZnCl2 2) concentrated ammonia 3) 0.01N hydrochloric acid / 1) pyridine, water, 24h room temperature 2) 5h 50 deg C 3) 18h 20 deg C View Scheme