ammonium hydroxide in acetonitrile 16 h; Ambient temperature;

1: chlorosulfonic acid / CH2Cl2 / a) from 0 deg C to 5 deg C, 1 h, b) RT, 1 h 2: 60 percent / aq. NH3 / acetonitrile / 16 h / Ambient temperature View Scheme

aluminium trichloride in xylene T=55 - 60°C; 24 h;