Rhodium-Catalyzed C4-Selective C–H Alkenylation of 2-Pyridones by Traceless Directing Group Strategy
作者:Sunit Hazra、Koji Hirano、Masahiro Miura
DOI:10.1021/acs.orglett.1c00050
日期:2021.2.19
A rhodium-catalyzed C4-selective C–H alkenylation of 3-carboxy-2-pyridones with styrenes has been developed. The carboxylic group at the C3 position works as the traceless directing group, and the corresponding C4-alkenylated 2-pyridones are obtained exclusively with concomitant decarboxylation. Unlike the reported procedures, the exclusive C4 selectivity is uniformly observed even in the presence
已经开发了铑催化的3-羧基-2-吡啶酮与苯乙烯的C4-选择性CH烯基化反应。C3位置的羧基用作无痕导向基团,相应的C4-烯基化2-吡啶酮仅通过伴随脱羧作用获得。与报道的方法不同,即使在C5和C6位置可能存在更具反应性的C–H键的情况下,也可以一致地观察到独有的C4选择性。通过使用这种策略,可以通过连续的C–H官能化反应制备多取代的2-吡啶酮。