Synthesis of novel ethyl 2,4-disubstituted 8-(trifluoromethyl)pyrido[2′,3′:3,4]pyrazolo[1,5-a]pyrimidine-9-carboxylate derivatives as promising anticancer agents
作者:N. Ravi Kumar、Y. Poornachandra、D. Krishna Swaroop、G. Jitender Dev、C. Ganesh Kumar、B. Narsaiah
DOI:10.1016/j.bmcl.2016.09.062
日期:2016.11
A series of novel pyrido[2′,3′:3,4] pyrazolo[1,5-a]pyrimidine derivatives 6–9 were prepared in single step starting from 3-amino-6-(trifluoromethyl)-1H-pyrazolo[3,4-b]pyridine-5-carboxylate 5 on reaction with symmetrical and unsymmetrical aliphatic and aromatic 1,3-diketones/α,β unsaturated ketones/α,β unsaturated keto ethers under conventional method. All the final compounds 6a–c, 8a–b and 9a–l were
一系列新的吡啶并[2',3':3,4]吡唑并[1,5-一个]嘧啶衍生物6 - 9是在单一的步骤中制备,起始自3-氨基-6-(三氟甲基)-1 ħ -吡唑并在常规方法下,[3,4- b ]吡啶-5-羧酸酯5与对称和不对称的脂族和芳族1,3-二酮/α,β不饱和酮/α,β不饱和酮醚反应。所有最终化合物6a – c,8a – b和9a – l筛选了针对五种人类癌细胞系(例如PC-3(CRL-1435),MDA-MB-231(HTB-26),Hep G2(HB-8065),HeLa(CCL-2)和正常HUVEC)的抗癌活性(CRL-1730)。已经鉴定出显示出有希望的抗癌活性的化合物8a,9f和9k。此外,有希望的化合物(8a和9f)能够抑制类似于喜树碱的人类拓扑异构酶I(TopI)活性。