Synthesis of Novel Aryl(heteroaryl)sulfonyl Ureas of Possible Biological Interest
作者:Franciszek Sączewski、Anna Kuchnio、Monika Samsel、Marta Łobocka、Agnieszka Kiedrowska、Karolina Lisewska、Jarosław Sączewski、Maria Gdaniec、Patrick J. Bednarski
DOI:10.3390/molecules15031113
日期:——
The course of reaction of aryl and heteroaryl sulfonamides with diphenylcarbonate (DPC) and 4-dimethylaminopyridine (DMAP) was found to depend on the pKa of the sulfonamide used. Aryl sulfonamides with pKa ~ 10 gave 4-dimethylamino-pyridinium arylsulfonyl-carbamoylides, while the more acidic heteroaryl sulfonamides (pKa ~ 8) furnished 4-dimethylaminopyridinium heteroarylsulfonyl carbamates. Both the carbamoylides and carbamate salts reacted with aliphatic and aromatic amines with the formation of appropriate aryl(heteroaryl)sulfonyl ureas, and therefore, can be regarded as safe and stable substitutes of the hazardous and difficult to handle aryl(heteroaryl)sulfonyl isocyanates.
发现芳基和杂芳基磺酰胺与碳酸二苯酯 (DPC) 和 4-二甲基氨基吡啶 (DMAP) 的反应过程取决于所用磺酰胺的 pKa。 pKa ~ 10 的芳基磺酰胺得到 4-二甲氨基-吡啶鎓芳基磺酰基-氨基甲酰基化物,而酸性更强的杂芳基磺酰胺 (pKa ~ 8) 则得到 4-二甲氨基吡啶鎓杂芳基磺酰基氨基甲酸酯。氨基甲酰基和氨基甲酸盐均与脂肪族和芳香族胺反应,形成适当的芳基(杂芳基)磺酰基脲,因此可以被视为危险且难以处理的芳基(杂芳基)磺酰基异氰酸酯的安全稳定的替代品。