Download PDF Opens in a new window. Article suggestions will be shown in a dialog on return to ScienceDirect. ... Please enable JavaScript to use all the features on this page. ... A facile construction of the 3,6-diamino-1,2,3,4-tetrahydropyridine-4-one class of compounds is described. Compound 2, a carbon analog at the N-3 position of TAN-1057A/B, was synthesized using this approach. ... A facile construction of the 3,6-diamino-1,2,3,4-tetrahydropyridine ...