1: 72 percent / AlCl3 / 1.) 15 deg C, 6.5 h, 2.) R.T. overnight 2: 98 percent formic acid / 12 h / 170 - 180 °C 3: 66 percent / POCl3 / toluene / 4.5 h / Heating 4: 1.) NaBH4, 5M NaOH, 2.) HCl / 1.) ethanol, reflux, 6 h, 2.) ether. View Scheme

1: 66 percent / POCl3 / toluene / 4.5 h / Heating 2: 1.) NaBH4, 5M NaOH, 2.) HCl / 1.) ethanol, reflux, 6 h, 2.) ether. View Scheme

1: 72 percent / AlCl3 / 1.) 15 deg C, 6.5 h, 2.) R.T. overnight 2: 98 percent formic acid / 12 h / 170 - 180 °C 3: 66 percent / POCl3 / toluene / 4.5 h / Heating 4: 1.) NaBH4, 5M NaOH, 2.) HCl / 1.) ethanol, reflux, 6 h, 2.) ether. View Scheme

hydrogenchloride; sodium hydroxide; sodium tetrahydroborate 1.) ethanol, reflux, 6 h, 2.) ether.; Yield given. Multistep reaction;

hydrogen bromide T=100°C; 6.5 h;