acetic acid; zinc in water 24 h; Ambient temperature; Yield given;

1: Et3N / hexane / 2.5 h / Heating 2: Zn, acetic acid / H2O / 24 h / Ambient temperature View Scheme

1: 72 percent / Na / diethyl ether; ethanol / 1) ice-bath, 6 h, 2) room temp., overnight 2: 85 percent / K2CO3 / acetone / 14 h / Heating 3: Et3N / hexane / 2.5 h / Heating 4: Zn, acetic acid / H2O / 24 h / Ambient temperature View Scheme