On Triazoles XIX: The Reaction of 5-Amino-1,2,4-triazoles with Functionalized Acetoacetic Esters

Article abstract of DOI:10.1007/BF00809530

Different "functionalized" alkyl 3-oxo-butyrates (2) were reacted with 5-amino-3-Q-1H-1,2,4-triazoles (1) to yield 3 and 4 type 1,2,4-triazolo<1,5-a>pyrimidinones.In case of 2 (R¹ = methyl, R² = 1-ethoxycarbonylethyl, R³ = ethyl) beside the corresponding derivative 4 the unexpected 5,6-dihydro-6,8-dimethyl-7-ethoxycarbonyl-3-methylthio-1,2,4-triazolo<4,3-a>-1,3-diazepin-5(9H)-one (7) was isolated, representing a novel ring system.