Synthesis, characterization and studies of new 3-benzyl-4<i>H</i>-1,2,4-triazole-5-thiol and thiazolo[3,2-<i>b</i>][1,2,4]triazole-5(6<i>H</i>)-one heterocycles
作者:Abdelwareth A. O. Sarhan、Hassa N. A. H. Elsherif、Abdalla M. Mahmoud、Osama M. A. Habib
DOI:10.1002/jhet.5570450339
日期:2008.5
give two triazole rings linked by thiomethylene group (5a-d), while cyclization of thiosemicarbazides 4a-d with chloroacetyl chloride in the presence of CHCl3 and K2CO3 afforded the thiazolidinone derivatives 6a-d. The reaction of thiosemicarbazides 4a-c with phenacyl bromide in the presence of EtOH and fused CH3COONa gave the corresponding thiazoline ring systems 7a-c. Condensation of the 3-benzyl-1
合成了3-苄基-4-苯基-1,2,4-三唑-5-硫醇(1),并将其用作原料制备高1,2,4-三唑取代的巯基氨基脲部分(4a-d)的原料。产量。在基本介质中将硫代氨基脲4a-d环化,得到两个通过硫亚甲基(5a-d)连接的三唑环,同时在CHCl 3和K 2 CO 3存在下用氯乙酰氯环化硫代氨基脲4a-d,得到噻唑烷酮衍生物6a-d。在EtOH和稠合CH 3存在下,硫代氨基脲4a-c与苯甲酰溴的反应COONa给出了相应的噻唑啉环系统7a-c。的3-苄基-1,2,4-三唑-5(1H) -硫醇(缩合1)与氯乙酸和芳族醛(8A-在熔融的乙酸钠的存在下,在沸腾的乙酸/乙酸酐混合物克)仅给出一个单一的异构体,可能为9a-g或10a-g。在化合物9a-e上与环仲胺如哌啶或吗啉进行Micheal加成反应后,2-苄基-6-((α-氨基-芳基/甲基)-1,3-噻唑洛[3,2- b ] [ 1,2,4]-三唑-5-