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。
Aminodi(hetero)arylamines in the Thieno[3,2-b]pyridine Series: Synthesis, Effects in Human Tumor Cells Growth, Cell Cycle Analysis, Apoptosis and Evaluation of Toxicity Using Non-Tumor Cells
作者:Ricardo C. Calhelha、Isabel C. F. R. Ferreira、Daniela Peixoto、Rui M. V. Abreu、Luís A. Vale-Silva、Eugénia Pinto、Raquel T. Lima、M. Inês Alvelos、M. Helena Vasconcelos、Maria-João R. P. Queiroz
DOI:10.3390/molecules17043834
日期:——
Three aminodi(hetero)arylamines were prepared via a palladium-catalyzed C-N Buchwald-Hartwig coupling of methyl 3-aminothieno[3,2-b]pyridine-2-carboxylate with different bromonitrobenzenes, followed by reduction of the nitro groups of the coupling products to the corresponding amino compounds. The aminodi(hetero)arylamines thus obtained were evaluated for their growth inhibitory effect on four human tumor cell lines MCF-7 (breast adenocarcinoma), A375-C5 (melanoma), NCI-H460 (non-small cell lung cancer) and HepG2 (hepatocellular carcinoma). The toxicity to non-tumor cells was also evaluated using a porcine liver primary cell culture (PLP1), established by us. The aminodi(hetero)arylamine with the NH2 group in the ortho position and an OMe group in the para position to the NH of the di(hetero)arylamine, is the most promising compound giving the lowest GI50 values (1.30–1.63 µM) in all the tested human tumor cell lines, presenting no toxicity to PLP1 at those concentrations. The effect of this compound on the cell cycle and induction of apoptosis was analyzed in the NCI-H460 cell line. It was observed that it altered the cell cycle profile causing a decrease in the percentage of cells in the G0/G1 phase and an increase of the apoptosis levels.