sodium in tetrahydrofuran 48 h;

1: 1.) ZnCl2, NaBH3CN 2.) Na, n-butylalcohol / 1.) MeOH, RT, 3 h 2.) reflux 2: 65 percent / Na / butan-1-ol / 4 h / Heating View Scheme

1: 98 percent / 2 N NaOH / ethanol; H2O / 8 h / Ambient temperature 2: 1.) ZnCl2, NaBH3CN 2.) Na, n-butylalcohol / 1.) MeOH, RT, 3 h 2.) reflux 3: 65 percent / Na / butan-1-ol / 4 h / Heating View Scheme