Synthesis of new thieno[3,2-b]pyridine derivatives by palladium-catalyzed couplings and intramolecular cyclizations
作者:Ricardo C. Calhelha、Maria-João R.P. Queiroz
DOI:10.1016/j.tetlet.2009.10.138
日期:2010.1
di(hetero)arylamines were obtained by C–N Buchwald–Hartwig coupling with bromonitrobenzenes and with 2-bromopyridine. In the latter case a tetracyclic compound was formed by intramolecular cyclization. Using a brominated derivative in the pyridine ring as a coupling component, it was possible to synthesize C–C (Suzuki and Sonogashira) and C–N (Buchwald–Hartwig) coupling products and a tetracyclic compound obtained
两个甲基3-氨基噻吩并[3,2- b ]吡啶-2-羧酸盐是从3制备-氟或3- nitropicolinonitriles和巯基乙酸甲酯在DMF / KOH(水溶液)。从吡啶环中未取代的前体中,通过C–N Buchwald–Hartwig与溴硝基苯和2-溴吡啶的偶联,获得二(杂)芳基胺。在后一种情况下,通过分子内环化形成四环化合物。使用吡啶环中的溴化衍生物作为偶联成分,可以合成C–C(Suzuki和Sonogashira)和C–N(Buchwald–Hartwig)偶联产物,以及通过噻吩并吡啶系统双官能化获得的四环化合物。
Novel 6-[(hetero)arylamino]thieno[3,2-b]pyridines: Synthesis and antitumoral activities
作者:Maria-João R.P. Queiroz、Ricardo C. Calhelha、Luís A. Vale-Silva、Eugénia Pinto、M. São-José Nascimento
DOI:10.1016/j.ejmech.2010.09.030
日期:2010.12
Several novel 6-[(hetero)arylamino]thieno[3,2-b]pyridines were prepared by palladium-catalyzed C-N Buchwald-Hartwig coupling of the methyl 3-amino-6-bromothieno[3,2-b]pyridine-2-carboxylate with aryl and heteroarylamines, using different reaction conditions. The antitumoral activity of the di(hetero) arylamines obtained was evaluated against three representative human tumor cell lines, namely breast adenocarcinoma (MCF-7), melanoma (A375-05), and non-small cell lung cancer (NCI-H460) and some structure activity relationships were established within each series. The most promising compounds were shown to be a benzothiazole derivative with GI(50) 3.5-6.9 mu M followed by an indole derivative with GI(50) 13-21 mu M. (C) 2010 Elsevier Masson SAS. All rights reserved.