β-1,2,3-噻二唑-5-基烯胺与乙酰氯在1,4-二恶烷中的反应会导致二烯胺或新型噻吩并[2,3- d ]哒嗪的形成,具体取决于时间和反应温度。发现了噻吩并[2,3- d ]哒嗪选择性合成的条件。可能的机理包括C–S和C–C键的形成以及5-乙烯基-1,2,3-噻二唑向哒嗪-4-硫醇盐中的新环重排。通过使甲酯与伯胺和叔胺反应,制得一系列新的2-(4-羧基-1,2,3-噻二唑-5-基)噻吩并[2,3 - d ]哒嗪-7-羧酸二酰胺。仲胺。
Synthesis of 4-thioacetyl-1,2,3-thiadiazoles. Reversible rearrangement of N-Substituted 5-methyl-1,2,3-thiadiazole-4-carbothioamides
摘要:
The equilibrium in the reversible rearrangement of 5-methyl-1,2,3-thiadiazole-4-carbothioamides into 5-amino-4-thioacetyl-1,2,3-thiadiazoles is displaced toward the former, and polar solvents favor increased fraction of the thioketone.