Synthesis of Novel 3-(3-(5-Methylisoxazol-3-yl)-7<i>H</i>-[1,2,4]Triazolo [3,4-<i>b</i>][1,3,4]Thiadiazin-6-yl)-2<i>H</i>-Chromen-2-Ones
作者:Krishnaiah Vaarla、Rajeswar Rao Vedula
DOI:10.1002/jhet.2301
日期:2016.1
4‐amino‐5‐(5‐methylisoxazol‐3‐yl)‐4H‐1,2,4‐triazole‐3‐thiol (3). This intermediate on further reaction with substituted 3‐(2‐bromo acetyl) coumarins under simple reaction conditions formed the title products 3‐(3‐(5‐methylisoxazol‐3‐yl)‐7H‐[1,2,4]triazolo[3,4‐b][1,3,4]thiadiazin‐6‐yl‐2H‐chromen‐2‐ones (5a, 5b, 5c, 5d, 5e, 5f, 5g, 5h, 5i, 5j) in good to excellent yields. All the synthesized compounds were well
通过使用5-甲基异恶唑-3-羧酸(1),硫代碳酰肼(2)和各种取代的3-(2-溴乙酰基)香豆素(4a,4b)设计和合成了一系列香豆素取代的三唑并噻二嗪衍生物。,4c,4e,4d,4f,4g,4h,4i,4j)。5-甲基异恶唑-3-羧酸与硫代氨基甲酰肼的熔融导致形成中间体4-氨基-5-(5-甲基异恶唑-3-基)-4 - H -1,2,4-三唑-3-硫醇(3)。该中间体与取代的3-(2-溴乙酰基)进一步反应而形成简单的反应条件的标题产物3-(3-(5-甲基异恶唑-3-基)-7下香豆素ħ - [1,2,4]三唑并[3,4-b] [1,3,4]噻二嗪-6-yl-2 H -chromen-2-ones(5a,5b,5c,5d,5e,5f,5g,5h,5i,5j)在所有合成的化合物均通过物理,分析和光谱技术进行了很好的表征。