Synthesis and biological activity of fluorinated 7-benzylamino-2-phenyl-1,2,4-triazolo[1,5-a][1,3,5]triazin-5-amines
作者:Anna V. Dolzhenko、Bee Jen Tan、Gigi Ngar Chee Chiu、Wai Keung Chui、Anton V. Dolzhenko
DOI:10.1016/j.jfluchem.2015.03.010
日期:2015.7
The reaction of benzhydrazide with cyanoguanidine followed by intramolecular cyclocondensation resulted in the formation of triazolylguanidine, which upon condensation with trichloroacetonitrile afforded a key intermediate – 2-phenyl-7-trichloromethyl-1,2,4-triazolo[1,5-a][1,3,5]triazin-5-amine. In mild conditions, this intermediate underwent nucleophilic displacement of the trichloromethyl group
设计了新型的氟化7-苄氨基-2-苯基-1,2,4-三唑并[1,5- a ] [1,3,5]三嗪-5-胺作为潜在的抗癌药,其实用的制备方法是发达。苯肼与氰基胍反应,然后进行分子内环缩合,形成三唑基胍,三唑基胍与三氯乙腈缩合后,提供了关键中间体– 2-苯基-7-三氯甲基-1,2,4-三唑[1,5- a] [1,3,5]三嗪-5-胺。在温和条件下,该中间体用一系列提供目标化合物的氟化苄胺进行了三氯甲基的亲核取代。探索了所制备的化合物对肺癌和乳腺癌细胞的抗增殖活性。除抗癌作用外,某些化合物还显示出抗血管生成特性。
Practical synthesis of regioisomeric 5(7)-amino-6,7(4,5)-dihydro[1,2,4]triazolo[1,5-a][1,3,5]triazines
作者:Anton V. Dolzhenko、Anna V. Dolzhenko、Wai-Keung Chui
DOI:10.1016/j.tet.2007.10.046
日期:2007.12
A convenient and efficient synthesis of new 5-azapurine derivatives was developed. The regioisomeric 5-amino-6,7-dihydro- and 7-amino-4,5-dihydro[1,2,4]triazolo[1,5-a][1,3,5]triazines were prepared in 3–4 steps from benzhydrazide via complementary and regiospecific routes as a part of our lead finding program. The molecular structures and tautomeric preferences of the compounds obtained were investigated
开发了一种方便而有效的新的5-氮杂嘌呤衍生物的合成方法。区域异构的5-氨基-6,7-二氢和7-氨基-4,5-二氢[1,2,4]三唑[1,5- a ] [1,3,5]三嗪在3-作为领先发现计划的一部分,从苯甲酰肼经过互补和区域专一性路线走4步。使用NMR光谱数据和X射线晶体学研究获得的化合物的分子结构和互变异构偏好。
A convenient method for the synthesis of 7-amino-substituted 1,2,4-triazolo[1,5-a][1,3,5]triazin-5-amines
作者:Anton V. Dolzhenko、Giorgia Pastorin、Anna V. Dolzhenko、Wai Keung Chui
DOI:10.1016/j.tetlet.2008.10.003
日期:2008.12
A new practical synthesis of 7-amino-substituted 1,2,4-triazolo[1,5-a][1,3,5]triazin-5-amines is developed. The triazine ring closure of 5-guanidino-3-phenyt-1,2,4-triazole with trichloroacetonitrile proceeds chemo- and regioselectively depending on the nature of the solvent. Conducting the reaction in toluene provided 7-trichloromethyl-1,2,4-triazolo[1,5-a][1,3,5]triazin-5-amine as the product, which can be further aminated efficiently with replacement of the trichloromethyl group. (C) 2008 Elsevier Ltd. All rights reserved.