1: Al(Hg), water / diethyl ether / 3 h / Ambient temperature 2: 1.) 35 percent aq. HCl, NaNO2, 2.) aq. NaCN / 1.) from 0 deg C to 5 deg C, 15 min, 2.) benzene, RT, 3 h View Scheme

hydrogenchloride; sodium cyanide; sodium nitrite 1.) from 0 deg C to 5 deg C, 15 min, 2.) benzene, RT, 3 h; Yield givenMultistep reaction;

diisobutylaluminium hydride in dichloromethane T=-50°C; 0.25 h;