1: 70 percent / bromine, iodine / acetic acid; CS2 2: 46 g / sodium borohydride / ethanol / 1 h / Heating 3: 1) sodium hydride / 1) THF, room temp., 1 h; 2) room temp. View Scheme

1: 46 g / sodium borohydride / ethanol / 1 h / Heating 2: 1) sodium hydride / 1) THF, room temp., 1 h; 2) room temp. View Scheme

sodium hydride 1) THF, room temp., 1 h; 2) room temp.; Yield given. Multistep reaction;