One-pot synthesis of novel pyrazolo[4,3-e][1,2,4]triazolo[1,5-c]pyrimidines under microwave irradiation in a green solvent
作者:Jia Hui Ng、Anton V. Dolzhenko
DOI:10.1016/j.tet.2023.133521
日期:2023.7
A one-pot microwave-assisted method for the synthesis of pyrazolo[4,3-e][1,2,4]triazolo[1,5-c]pyrimidines from 5-aminopyrazolyl-4-carbonitriles, orthoesters, and hydrazides was developed. The method utilizes anisole as a geen media for the reaction and tolerates variations in the structure of each substrate, thus allowing the preparation of diverse pyrazolo[4,3-e][1,2,4]triazolo[1,5-c]pyrimidines.
3,4-Diaminopyrazolo[3,4-<i>d</i>]pyrimidines: a new three-component microwave-assisted synthesis and anti-leukemic properties
作者:Jia Hui Ng、Felicia Phei Lin Lim、Edward R. T. Tiekink、Anton V. Dolzhenko
DOI:10.1039/d3ob00350g
日期:——
the synthesis of N3,N4-disubstituted 3,4-diaminopyrazolo[3,4-d]pyrimidines was developed using a three-component reaction of 3,5-diaminopyrazole-4-carbonitriles with primary amines and orthoesters. The preparation of 116 examples demonstrated the good scope of the reaction, which tolerated variations in the substrate structure and was particularly efficient under microwave irradiation. The short reaction
使用 3,5-二氨基吡唑-4-腈与伯胺和原酸酯的三组分反应,开发了一种合成N 3 , N 4 -二取代 3,4-二氨基吡唑并 [3,4- d ] 嘧啶的简便方法. 116 个实例的制备证明了反应的良好范围,它可以容忍底物结构的变化,并且在微波辐射下特别有效。较短的反应时间和无需层析的产物分离增加了该方法的实用性。体外评估抗白血病活性使用 K562 和 Jurkat T 细胞,并使用非癌性 MRC5 细胞评估最活跃化合物的选择性。最有希望的化合物抑制 Jurkat T 细胞,GI 50值为 0.5 μM,选择性指数为 65。
Dominguez, Jose N.; Charris, Jaime E.; Caparelli, Mario, Arzneimittel-Forschung/Drug Research, 2002, vol. 52, # 6, p. 482 - 488
作者:Dominguez, Jose N.、Charris, Jaime E.、Caparelli, Mario、Riggione, Flavia
DOI:——
日期:——
A one-pot, three-component aminotriazine annulation onto 5-aminopyrazole-4-carbonitriles under microwave irradiation
作者:Felicia Phei Lin Lim、Giuseppe Luna、Anton V. Dolzhenko
DOI:10.1016/j.tetlet.2014.12.010
日期:2015.1
A one-pot, three-component, microwave-assisted reaction of 5-aminopyrazole-4-carbonitriles, triethyl orthoformate and cyanamide afforded novel 7-arylamino-substituted 4-aminopyrazolo[1,5-a][1,3,51 triazine-8-carbonitriles. The reaction proceeded in a chemo- and regioselective manner resulting in the successful amino-1,3,5-triazine annulation onto 5-aminopyrazole-4-carbonitriles to give 4-aminopyrazolo [1,5-a][1,3,5]triazine-8-carbonitriles. The operational simplicity of the method and high purity of the products, which can be isolated via simple filtration, make this approach attractive for the preparation of a library of compounds for drug discovery processes. (C) 2014 Elsevier Ltd. All rights reserved.