Synthesis of several pryrazolo[4,3-e][1,2,4]-triazines is described. The absorption spectrum of some 5-substituted derivatives was found to extend to the visible region. These compounds were found to inhibit some enzymes of purine metabolism, like xanthine oxidase or bacterial purine-nucleoside phosphorylase with Ki values in the 10-3 – 10-5 M range.
描述了几种吡唑并[4,3-e][1,2,4]-三嗪的合成。发现一些 5-取代衍生物的吸收光谱扩展到可见光区。发现这些化合物可以抑制嘌呤代谢的一些酶,如黄嘌呤氧化酶或细菌嘌呤核苷磷酸化酶,Ki 值在 10-3 – 10-5 M 范围内。
General route to the total synthesis of sempervirine analogues containing modified E rings, potential cytostatics
作者:Teodozja Lipińska
DOI:10.1016/s0040-4039(02)02389-4
日期:2002.12
obtained via inverse electron demand Diels–Alder reactions of 5-acetyl-3-(methylsulfanyl)-1,2,4-triazine with cyclic enamines (formation of D and E rings) followed by Fischer indole synthesis under microwave irradiation on solid support (formation of A and B rings) and subsequent annulation of indole derivatives 10a–c via a directedmetallationroute (formation of C rings).
Transformations of phenylhydrazones of 5-acyl-1,2,4-triazines to pyrazolo[4,3-<i>e</i>][1,2,4]triazines or 4-cyanopyrazole
作者:Mariusz Mojzych、Andrzej Rykowski
DOI:10.1002/jhet.5570440504
日期:2007.9
A simple and high yielding preparation of pyrazolo[4,3-e][1,2,4]triazines and 4-cyano-3-methyl-1-phenylpyrazole derivatives from corresponding phenylhydrazones of 5-acyl-1,2,4-triazines by melt under acidic medium and by thermal heating, respectively.
由5-酰基-1,2,4-的相应苯hydr类化合物简单高效地制备吡唑并[4,3- e ] [1,2,4]三嗪和4-氰基-3-甲基-1-苯基吡唑衍生物通过在酸性介质下熔融和通过热加热分别形成三嗪。
Palladium-catalyzed cross-coupling of 5-acyl and 5-formyl-1,2,4-triazines and their derivatives with heteroaromatic tin compounds
作者:Danuta Branowska、Ewa Olender、Andrzej Rykowski
DOI:10.1016/j.tet.2014.04.094
日期:2014.8
mono- and di(substituted)-1,2,4-triazine derivatives containing thiophene and furan rings are described. Heteroaromatic rings were provided using palladium-catalyzedcross-coupling reaction between 3-alkylsulfanyl-5-acyl-1,2,4-triazines or 5-cyano-3-alkylsulfanyl-1,2,4-triazines and heteroaromatic tin compounds. New compounds bearing masked acyl groups were also obtained. These reactions were optimized
A series of new pyrazolo[4,3-e][1,2,4]triazine acyclonucleosides 2–5 and 8 were prepared and evaluated for their anticancer activity against human cancer cell lines (MCF-7, K-562) and CDK2/E, as well as Abl protein kinases inhibitors. Lipophilicity of the compounds was determined using C-18 and immobilized artificial membrane (IAM) chromatography. In order to confirm the molecular structures and synthesis