On the mechanism of the treumann test for theobromine
Francisco Sánchez-Viesca, Reina Gómez
The Treumann color test for theobromine consists of reaction of this alkaloid with chlorine water, followed by ammonia addition: a purple color is developed. This reaction can be related to the murexide test for uric acid, other purine derivative. However, different structure, uric acid is not a xanthine, and different reagent, hypochlorous instead of nitric acid, induced interest to the theorist since the reaction route and the mechanism necessarily will be different too. This study proved that they are so. We give the electron flow occurring in the multiple steps leading to a dimethyl analogue of purpuric acid whose ammonium salt is the purple compound.