Carbonyl and thiocarbonyl stabilized 1,4-dihydropyrazines: synthesis and characterization
作者:David J. R. Brook、Bruce C. Noll、Tad H. Koch
DOI:10.1039/a705391f
日期:——
8-Hexamethyl-3,4,7,8-tetrahydro-2,4a,6,8a-tetraazaanthracene-1(2H),5(6H)-dione (HTTA) is synthesized by chlorination of the previously reported 5,6-dihydro-1,3,5,5-tetramethylpyrazin-2(1H)-one with tert-butyl hypochlorite and self condensation of the resulting α-chloromethylimine in the presence of diisopropylethylamine in dimethylformamide (DMF). Thioxo derivatives 3,4,7,8-tetrahydro-4,4,8,8-tetramethyl-5-thioxo-2
1,4-二氢吡嗪,3,4,7,8-四氢-4,4,8,8-四甲基-2,6-二氧杂-4a,8a-二氮杂蒽-1,5-二酮(DDTTA)的三个类似物,已经合成。2,4,4,6,8,8-六甲基-3,4,7,8-四氢-2,4a,6,8a-四氮杂蒽-1(2 H),5(6 H)-二酮(HTTA)通过用先前的次氯酸叔丁酯氯化先前报道的5,6-二氢-1,3,5,5-四甲基吡嗪-2(1 H)-一并在二异丙基乙胺存在下使生成的α-氯甲基亚胺自缩合来合成在二甲基甲酰胺(DMF )中。硫代氧衍生物3,4,7,8-四氢-4,4,8,8-四甲基-5-硫代氧-2,6-二氧杂-4a,8a-二氮杂蒽-1-酮(DDTTA-S)和3,4 ,7,8-四氢-4,4,8,8-四甲基-2,6-二氧杂-4a,8a-二氮杂蒽-1,5-二硫酮(DDTTA–S2)是通过在吡啶中用五硫化二磷直接硫代DDTTA合成的。所有三个分子均已通过光谱表征。另