1: 1.) NaNO2, 2 N HBr; 2.) ion-exchange resin Dowex 50 W-8 / 1.) Sandmeyer catalyst / 1.) water, 40 deg C, 30 min 2: 5.3 percent / 1 N NaOH / 2-methyl-propan-2-ol; H2O / 24 h / Ambient temperature View Scheme