potassium hydroxide in methanol 3 h; Ambient temperature;

1: 1) BuLi, ZnCl2 / 2) iBu2AlH, Pd(PPh3)2Cl2 / 1) THF, hexane, r.t., 1 h, 2) THF, hexane, r.t., overnight 2: 82 percent / aq. KOH / methanol / 3 h / Ambient temperature View Scheme

2: 1) BuLi, ZnCl2 / 2) iBu2AlH, Pd(PPh3)2Cl2 / 1) THF, hexane, r.t., 1 h, 2) THF, hexane, r.t., overnight 3: 82 percent / aq. KOH / methanol / 3 h / Ambient temperature View Scheme