Synthesis and characterization of a series of dialkyl esters of 1,2,4,5-tetrazine-3,6-dicarboxylic acid are reported. These compounds were prepared by a two-stage synthesis: re-esterification of dimethyl 1,4-dihydro-1,2,4,5-tetrazine-3,6-dicarboxylate in the presence of aluminium triethoxide and subsequent dehydrogenation of dialkyl 1,4-dihydro-1,2,4,5-tetrazine-3,6-dicarboxylates. The structures of the prepared compounds were confirmed by NMR and mass spectra.
报道了一系列1,2,4,5-四氮唑-3,6-二羧酸二烷基酯的合成和表征。这些化合物通过两阶段合成制备:在三乙氧基铝存在下对二甲基1,4-二氢-1,2,4,5-四氮唑-3,6-二羧酸酯进行重新酯化,然后脱氢得到二烷基1,4-二氢-1,2,4,5-四氮唑-3,6-二羧酸酯。通过核磁共振和质谱确认了所制备化合物的结构。