Synthesis of Some New Fused and Binary 1,3,4-Thiadiazoles as Potential Antitumor and Antioxidant Agents
作者:Wafaa S. Hamama、Moustafa A. Gouda、Marwa H. Badr、Hanafi H. Zoorob
DOI:10.1002/jhet.1569
日期:2013.7
Annulations of 2‐amino‐1,3,4‐thiadiazole (1) with α,β‐unsaturated carbonyl compounds 2, 5, and 9 afforded thiadiazolo[3,2‐a]pyrimidin 3, benzamide 7, and bis‐pyrazole derivative 11. Cyclization of benzamide 7 with POCl3 gave binary imidazole derivative 8. Moreover, alkylation of 1 with 2‐bromo‐1‐(2H‐chromen‐3‐yl) ethanone (9) followed by cyclization gave imidazo[2,1‐b]‐1,3,4‐thiadiazole derivative
2-氨基-1,3,4-噻二唑(的Annulations 1)与α,β不饱和羰基化合物2,5,和9,得到噻二唑并[3,2-一个]嘧啶3,苯甲酰胺7,和双-吡唑衍生物11。苯甲酰胺7与POCl 3的环化反应生成二元咪唑衍生物8。此外,将1用2-溴-1-(2 H-铬n-3-基)乙酮烷基化(9),然后环化,得到咪唑[2,1 - b ] -1,3,4-噻二唑衍生物15。1与杂环和/或芳族醛和巯基乙酸的多组分反应提供了相应的噻唑烷酮17和19。最终,用Isatin和thiosemicarbazide进行的一锅法合成1合成了螺三唑20。评价新合成的化合物作为抗肿瘤剂。