Azidosubstituted arylboronic acids: synthesis and Suzuki–Miyaura cross-coupling reactions
作者:Sergey I. Sviridov、Andrei A. Vasil'ev、Natalia L. Sergovskaya、Marina V. Chirskaya、Sergey V. Shorshnev
DOI:10.1016/j.tet.2005.12.026
日期:2006.3
Arylboronic acids having a remote azido group were prepared from the corresponding azidosubstituted aryl bromides via lithiation and treatment with trialkyl borates. Preparative yields were achieved when the starting aryl bromides possessed ortho-alkoxy groups, which would stabilize the intermediate aryllithium species. Conventional Suzuki cross-coupling of the arylboronic acids proceeded generally
由相应的叠氮基取代的芳基溴化物通过锂化和用硼酸三烷基酯处理来制备具有较远叠氮基的芳基硼酸。当起始的芳基溴化物具有邻烷氧基时,可以稳定中间芳基锂物质,从而获得了制备产率。芳基硼酸的常规Suzuki交叉偶联通常在保留叠氮基团的情况下进行得很好。但是,叠氮甲基片段有时会发生氧化转化为腈。