作者:Gilles Ulrich、Sébastien Bedel、Claude Picard、Pierre Tisnès
DOI:10.1055/s-2002-33347
日期:——
The synthesis of various oligopyridines possessing a carboxylate and at least one bromoethyl group is reported. The bipyridine and terpyridine cores were constructed in good yields via a Stille cross-coupling, starting from bromopicolines and ethyl bromopicolinate. The bromomethyl function was obtained by free radical bromination using NBS in benzene or bromine in benzene/water biphasic mixture. The building of two model podands by nucleophilic displacement of benzylic bromine by an amine or by a phenol group is described.
本研究报道了多种具有一个羧基和至少一个溴乙基的低聚吡啶的合成。双吡啶和terpyridine 核心是通过 Stille 交叉偶联法,从溴邻吡啶和溴邻吡啶甲酸乙酯开始,以良好的收率合成的。溴甲基官能团是通过在苯中使用 NBS 或在苯/水双相混合物中使用溴进行自由基溴化得到的。文中介绍了通过胺或苯酚基团对苄基溴的亲核置换作用建立两种模型荚膜的方法。