Sequential one pot double C H heteroarylation of thiophene using bromopyridines to synthesize unsymmetrical 2,5-bipyridylthiophenes
作者:Charline Kieffer、Victor Babin、Marie Jouanne、Ikram Slimani、Yohann Berhault、Rémi Legay、Jana Sopková-de Oliveira Santos、Sylvain Rault、Anne Sophie Voisin-Chiret
DOI:10.1016/j.tet.2017.07.049
日期:2017.9
present CH heteroarylation reactions between thiophene and variously substituted bromopyridines. The objective was to synthesize unsymmetrical 2,5-bipyridylthiophenes. We studied the reaction conditions allowing to a sequential one-pot double CH heteroarylation, in a view to introduce two different pyridyl moieties at positions 2 and 5 of the thiophene ring using bromopyridines. 11 original unsymmetrical
我们提出了噻吩和各种取代的溴吡啶之间的CH杂芳基化反应。目的是合成不对称的2,5-联吡啶基噻吩。我们研究了允许一锅加一双C的反应条件H杂芳基化,目的是使用溴吡啶在噻吩环的2和5位引入两个不同的吡啶基部分。合成和表征了11种原始的不对称2,5-联吡啶基噻吩,包括2,5-二(吡啶-2-基)噻吩,通过经典的交叉偶联反应制备具有挑战性。最后,通过不对称的2,5-二芳基噻吩和原始嘧啶-噻吩-呋喃支架的额外合成,我们证明了我们的方法也是访问新杂环序列的有效工具。