通过4-氨基-3-芳基/芳烷基取代的5-巯基-的缩合反应,制备了几种3,6-二取代-1,2,4-三唑并[3,4-b] -1,3,4-噻二唑。 1,2,4-三唑3(ac)与各种取代的芳族/杂芳族酸通过一步反应进行合成。元素分析,IR,1 H NMR和质谱数据证实了新合成化合物的结构。研究了合成的三唑并噻二唑的抗菌,抗真菌,消炎和镇痛作用。一些测试的化合物对各种测试的细菌和真菌菌株显示出中等的抗菌活性。合成的化合物均不具有显着的抗炎和镇痛活性。
Synthesis and Biological Evaluation of Novel Glycosyl-Containing 1,2,4-Triazolo[3,4-<i>b</i>][1,3,4]Thiadiazole Derivatives as Acetylcholinesterase Inhibitors
作者:Xiu-Jian Liu、Lei Wang、Long Yin、Feng-Chang Cheng、Hui-Min Sun、Wei-Wei Liu、Da-Hua Shi、Zhi-Ling Cao
DOI:10.3184/174751917x15064232103047
日期:2017.10
An efficient protocol for the synthesis of novel glycosyl-containing 1,2,4-triazolo[3,4-b][1,3,4]thiadiazole derivatives starting from the commercially available D-glucosamine hydrochloride is described by reaction of glycosyl isothiocyanate with various aminotriazoles in DMF. Glycosyl isothiocyanate is an important intermediate and synthetic methods are discussed. The acetylcholinesterase inhibitory
Studies on Synthesis and Pharmacological Activities of 1,2,4-Triazolo[3,4-<i>b</i>]1,3,4-thiadiazoles and their Dihydro Analogues
作者:Vinod Mathew、Devasahayam Giles、Jathi Keshavayya、Vijaya P. Vaidya
DOI:10.1002/ardp.200800073
日期:2009.4
4‐Amino‐5‐substituted aryl‐3‐mercapto‐1,2,4‐triazoles are versatile synthons for constructing various biologically active heterocycles. Starting from 4‐amino‐5‐substituted aryl‐3‐mercapto‐1,2,4‐triazole 3a–c, a series of new 3,5‐disubstituted‐1,2,4‐triazolo‐[3,4‐b]1,3,4‐thiadiazoles and their 5,6‐dihydrotriazolothiadiazoles were prepared. The structures of all the newly synthesized compounds have been
4-Amino-3-mercapto-4<i>H</i>-1,2,4-triazoles and propargyl aldehydes: A new route to 3-<i>R</i>-8-aryl-1,2,4-triazolo[3,4-<i>b</i>]-1,3,4-thiadiazepines
作者:Ned D. Heindel、Jack R. Reid
DOI:10.1002/jhet.5570170547
日期:1980.7
mercapto groups on 4-amino-3-mercapto-4H-4H-1,2,4-triazoles can be cyclized by phenylpropargyl aldehydes. The aldehydes experience Michael addition of the SH to the alkyne linkage and imine formation between the NH2 and the aldehyde carbonyl to produce 3-R-8-aryl-1,2,4-triazolo[3,4-b]-1,3,4-thiadiazepines.
4-氨基-3-巯基-4 H -4 H -1,2,4-三唑上的氨基和巯基侧基可被苯基炔丙基醛环化。醛类会经历SH到炔键的迈克尔加成反应以及NH 2和醛羰基之间的亚胺形成,从而产生3- R -8-芳基-1,2,4-三唑并[3,4- b ] -1, 3,4-噻二氮杂.。
On the possibility for synthesizing dihydrotriazolothiadiazoles by condensation of 4-amino-2,4-dihydro-3H-1,2,4-triazole-3-thiones with aromatic aldehydes
作者:A. Ya. Bespalov、T. L. Gorchakova、A. Yu. Ivanov、M. A. Kuznetsov、L. M. Kuznetsova、A. S. Pankova、L. I. Prokopenko、A. F. Khlebnikov
DOI:10.1134/s1070428016030210
日期:2016.3
Regardless of the conditions, the condensation of 4-amino-2,4-dihydro-3H-1,2,4-triazole-3-thiones with aromaticaldehydes afforded the corresponding hydrazones as the only product. Both initial amines and resulting hydrazones exist as the thione rather than thiol tautomer. In no case bicyclic 5,6-dihydro[1,2,4]triazolo[3,4-b][1,3,4]thiadiazoles that are isomeric to the hydrazones were detected. DFT
无论条件如何,4-氨基-2,4-二氢-3 H -1,2,4-三唑-3-硫酮与芳族醛的缩合得到相应的为唯一产物。初始胺和生成的均以硫酮而不是硫醇互变异构体的形式存在。在任何情况下均未检测到与酮异构体的双环5,6-二氢[1,2,4]三唑并[3,4- b ] [1,3,4]噻二唑。B3LYP / 6-31 + g(d,p的DFT量子化学计算))具有完整几何优化的理论水平表明,甲醇和DMF中的structure结构比双环异构体稳定19-23 kcal / mol,这完全排除了这种环化的可能性。的硫酮互变异构体比硫醇结构稳定11-13 kcal / mol。
HEINDEL N. D.; REID J. R., J. HETEROCYCL. CHEM., 1980, 17, NO 5, 1087-1088