Facile Construction of Quinoline-2-carboxylate Esters through Aerobic Oxidation of Alkyl 4-Anilinocrotonates Induced by a Radical Cation Salt
作者:Xiaodong Jia、Pengfei Li、Yu Shao、Yu Yuan、Wentao Hou、Xiaofei Liu、Xuewen Zhang、Honghe Ji
DOI:10.1002/asia.201700560
日期:2017.7.18
aerobic oxidation of alkyl 4‐anilinocrotonates is described. In the presence of dioxygen, sp3 C−H bonds in 4‐anilinocrotonates can easily be oxidized by using a catalytic amount of a radical cation salt, providing a radical intermediate. After further oxidation and domino cyclization, the desired quinoline derivatives were afforded in high yields. This reaction provides a new way to construct the pharmaceutically
描述了一种通过4-苯胺基巴豆酸酯烷基的好氧氧化来轻松构建喹啉-2-羧酸酯的方法。在存在双氧的情况下,通过使用催化量的自由基阳离子盐,可轻松地氧化4-苯胺基巴豆酸酯中的sp 3 C-H键,从而提供自由基中间体。在进一步氧化和多米诺环化之后,以高收率获得所需的喹啉衍生物。该反应提供了构建药学上相关的喹啉骨架的新方法,避免了苛刻的反应条件和繁琐的原料合成。