Heterocycles in organic synthesis. Part 16. The conversion of aliphatic, aromatic, and heteroaromatic primary amines into iodides
22 Aliphatic primary and secondary carbylamines, aliphatic unsaturated-, hydroxy- and di-amines, benzylamines, anilines, 2-pyridylamines, and thiazolylamines have been converted in 62–96%(average 84%) yield into 1-substituted-2,4,6-triphenylpyridinium iodides by 2,4,6-triphenylpyrylium iodide. Pyrolysis of these at 135–300 °C gave the iodides corresponding to the starting amines in 52–86%(average 76%) yield.