A Simple, Convenient One-Pot Synthesis of Dithio-Carbamide Derivatives of Heterocyclic 1,3-Dicarbonyl Systems

A various new dithi-ocarbamides were synthesized from heterocyclic six-membered 1,3-dicarbonyl systems, such as 4-hydroxy-2,5-pyranopyridines, 4-hydroxy-2-pyridones, 4-Hydroxy-2-quinolones, 4-hydroxy-coumarins, and 4-hydroxy-1-methyl-2-quinolones. The dicarbonyl compounds in the presence of anhydrous potassium carbonate in dimethyformamide react with tetraalkylthiuram disulfides to yield 3-dialkylaminothiocarbonylthio derivatives through a simple, convenient one-pot reaction. The structures were confirmed by using IR, NMR, and elemental analysis.