Abstract A simple and efficient route for preparing 2, 3, 5, 6-tetraaminopyridine hydrochloride salt (TAP· 3HCl· H 2 O) was introduced in this paper. The title compound was synthesized, as usual, in two steps (nitration and hydrogenation) with a total yield of 90%. The use of an oleum and fuming nitric acid mixture in the nitration step improved the yield and purity of the intermediate product. A highly efficient hydrogenation using a H 2/Pd/C/C 2 H 5 OH ...
