Synthesis of Biologically Potent Novel 5-(2-bromopyridin-3-yl-amino)-2- alkyl/aryl-isoindoline-1,3-dione Analogs Via Buchwald-Hartwig C-N Coupling Reaction
作者:Ankur Gupta、Bhagyashree Kamble、Chandrasekar M.J. Nanjan
DOI:10.2174/1570178611310020013
日期:2013.4.1
A novel series of N-alkyl/aryl substituted phthalimide analogs containing 2-bromopyridyl functionality were
synthesized applying optimized Buchwald-Hartwig amination conditions using palladium acetate, cesium carbonate, and
±BINAP in toluene at 110°C under argon atmosphere. The target heteroaryl phthalimide derivatives were obtained in
moderate yield ranging from 40% to 51%. In the extra precision (XP) docking studies, at the ATP site of human topoisomerase
IIα (hTopoIIα) (PDB id 1ZXM), we identified that compound 3(a) demonstrated remarkable H-bond interactions
with catalytic MG2+, ASN 91, SER 148, SER 149, ALA 167 and compound 3(c) with ARG 162, ASN 163, GLY
164, LSY 168, ASN 95 indicating their significance as a plausible hTopoIIα inhibitors. In the in vitro evaluation of A549
cell line, compounds 3(a) and 3(c) were observed to have only moderate cytotoxicity (IC50 180μg/ml and 210μg/ml respectively).
The developed process could be widely employed for the synthesis of novel heterocyclic compounds with one
of the components as N-alkyl/aryl substituted phthalimide derivatives and has the potential to be developed as a major
route for the identification of active drug candidates.
合成了一系列新型的N-烷基/芳基取代的腈氟酰胺类衍生物,这些衍生物含有2-溴吡啶基功能团,采用优化的Buchwald-Hartwig氨化条件,使用醋酸钯、碳酸铯和±BINAP,在惰性气氛下的甲苯中于110°C反应。目标杂环腈氟酰胺衍生物的收率在40%到51%之间。在额外精度(XP)对接研究中,在人类拓扑异构酶IIα(hTopoIIα)的ATP结合位点(PDB ID 1ZXM),我们发现化合物3(a)与催化的MG2+、ASN 91、SER 148、SER 149、ALA 167表现出显著的氢键相互作用,而化合物3(c)则与ARG 162、ASN 163、GLY 164、LYS 168、ASN 95形成相互作用,这表明它们作为hTopoIIα抑制剂的重要性。在对A549细胞系的体外评估中,化合物3(a)和3(c)的细胞毒性仅为中等(IC50分别为180μg/ml和210μg/ml)。开发的合成方法可以广泛用于合成新型杂环化合物,其中一个组分为N-烷基/芳基取代的腈氟酰胺衍生物,并且具有作为活性药物候选者识别的主要途径的潜力。