TMSOTf-mediated Kröhnke pyridine synthesis using HMDS as the nitrogen source under microwave irradiation
作者:Chieh-Kai Chan、Yi-Hsiu Chung、Cheng-Chung Wang
DOI:10.1039/d2ra00084a
日期:——
An efficient protocol for the preparation of pyridine skeletons has been successfully developed involving the TMSOTf/HMDS (trifluoromethanesulfonic acid/hexamethyldisilane) system for the intermolecular cyclization of chalcones under MW (microwave) irradiation conditions. This method provides a facile approach to synthesize 2,4,6-triaryl or 3-benzyl-2,4,6-triarylpyridines in good to excellent yields
已经成功开发了一种制备吡啶骨架的有效方案,涉及 TMSOTf/HMDS(三氟甲磺酸/六甲基二硅烷)系统,用于在微波(微波)照射条件下进行查尔酮分子间环化。该方法提供了一种简便的方法来合成 2,4,6-三芳基或 3-苄基-2,4,6-三芳基吡啶,收率良好至优异。有趣的是,通过将酸添加剂改为Sn(OTf) 2获得了2,6-二氮杂双环[2.2.2]辛-2-烯核,并且使用X射线单晶衍射分析也证实了所需产物。