hydrogenchloride T=25°C; 2 h;

1: 79 percent / p-toluenesulphonic acid / benzene / 16 h / Heating 2: 1.) TMEDA, BunLi / 1.) THF/hexane, -78 deg. C, 2 h, 2.) 25 deg. C, 12 h 3: 92 percent / 2 M HCl aq. / 2 h / 25 °C View Scheme

1: 1.) TMEDA, BunLi / 1.) THF/hexane, -78 deg. C, 2 h, 2.) 25 deg. C, 12 h 2: 92 percent / 2 M HCl aq. / 2 h / 25 °C View Scheme

1: HNO3, H2SO4 / -10 °C 2: Na2Cr2O7, H2SO4 3: Cu / quinoline / 260 °C View Scheme