Synthesis of N-pyridyl azoles using a deprotometalation-iodolysis-N-arylation sequence and evaluation of their antiproliferative activity in melanoma cells
作者:Madani Hedidi、William Erb、Ghenia Bentabed-Ababsa、Floris Chevallier、Laurent Picot、Valérie Thiéry、Stéphane Bach、Sandrine Ruchaud、Thierry Roisnel、Vincent Dorcet、Florence Mongin
DOI:10.1016/j.tet.2016.08.056
日期:2016.10
N-Arylation of pyrrole with 3-iodo-4-methoxypyridine was investigated by copper catalysis under different conditions. The best conditions, that proved to be protocol A (CuI, DMEDA or TMEDA, K3PO4, DMF at 110 °C) and above all protocol B (Cu2O, Cs2CO3, DMSO at 110 °C), were applied to the synthesis of various N-(methoxypyridyl) pyrroles, indoles and benzimidazoles. The behavior of the different iodinated
通过铜催化在不同条件下研究了吡咯与3-碘-4-甲氧基吡啶的N-芳基化反应。最佳条件被证明是协议A(CuI,DMEDA或TMEDA,K 3 PO 4,DMF在110°C)以及最重要的协议B(Cu 2 O,Cs 2 CO 3,DMSO在110°C),用于合成各种N-(甲氧基吡啶基)吡咯,吲哚和苯并咪唑。通过评估从1开始的含碳碘上的部分正电荷,可以合理化不同碘化甲氧基吡啶的行为相应的脱碘底物的1 H NMR化学位移。接下来,将反应与去碘原化-碘分解步骤连接,生成碘化的甲氧基吡啶:粗的碘代中间体直接参与吡咯N-芳基化,以良好的产率提供了预期的N-(甲氧基吡啶基)吡咯。几种合成的N-(甲氧基吡啶基)唑在A2058黑色素瘤细胞中发挥低至中等的抗增殖活性。