作者:Songbai Liu、Lanny S. Liebeskind
DOI:10.1021/ja8013743
日期:2008.6.1
A simple, modular method to prepare highly substituted pyridines is disclosed. The method employs a cascade reaction comprising (1) a novel N-iminative, Cu-catalyzed cross-coupling of alkenylboronic acids at the N-O bond of alpha,beta-unsaturated ketoxime O-pentafluorobenzoates, (2) electrocyclization of the resulting 3-azatriene, and (3) air oxidation affording highly substituted pyridines in moderate
公开了一种制备高度取代的吡啶的简单、模块化的方法。该方法采用级联反应,包括 (1) 在 α,β-不饱和酮肟 O-五氟苯甲酸酯的 NO 键上烯基硼酸的新型 N-亚胺基、Cu 催化交叉偶联,(2) 所得 3-氮杂三烯的电环化,和 (3) 空气氧化以中等至极好的分离产率 (43-91%) 提供高度取代的吡啶。原料易得,官能团耐受性非常好。