作者:L. M. Mironovich
DOI:10.1023/a:1022582606145
日期:——
Boiling of ethyl cyanoacetate with 6-tert-butyl-3-hydrazino-1,2,4-triazin-5(2H)-one in alkaline medium yielded 6-tert-butyl-3-(5-hydroxy-3-oxo-2,3-dihydro-1H-pyrazol-1-yl)-1,2,4-triazin-5(2H)-one. Acylation of 6-tert-butyl-3-hydrazino-1,2,4-triazin-5(2H)-one with benzoyl chloride furnished 3-benzoylhydrazido- 1,2,4-triazine that cyclized when treated with POCl3 providing a derivative of [1,2,4]triazolo[4,3-b][1,2,4]triazine. Boiling of 6-tert-butyl-3-hydrazino-1,2,4-triazin-5(2H)-one in glacial acetic acid gave rise to diacetylated derivative whereas the boiling with acetic anhydride in an inert solvent afforded monoacetylated product.