2: Triethylamine, (Dimethylamino)pyridine / diethyl ether / 1.) 14 h, room temp., 2.) 12 h, reflux 3: NaI / acetone / 18 h / Ambient temperature View Scheme

1: Triethylamine, (Dimethylamino)pyridine / diethyl ether / 1.) 14 h, room temp., 2.) 12 h, reflux 2: NaI / acetone / 18 h / Ambient temperature View Scheme