Visible-light-induced phosgenation of amines by chloroform oxygenation using chlorine dioxide.

We report the visible-light-induced in situ preparation of COCl 2 through the oxygenation of chloroform in the presence of chlorine dioxide, which leads to the safe constructions of carbamoyl chlorides with good-to-high yields and wide substrate scopes. In addition, this method can also be applied to the synthesis of various carbonates.