A direct intermolecular olefination of sp3 C–H bond between 2-oxindoles and simple alkenes via a Cross-Dehydrogenative Coupling (CDC) strategy has been developed. In the absence of additional base, moderate to excellent yields have been obtained by using a catalytic amount of iodine with atmospheric oxygen as the reoxidant. Based on the observation of a radical capture experiment, the transformation
通过交叉
脱氢偶联(CDC)策略,已开发了2-
氧吲哚和简单
烯烃之间sp 3 C–H键的直接分子间
烯烃化反应。在不存在附加碱的情况下,通过使用催化量的
碘与大气
氧作为再
氧化剂,已获得中等至优异的收率。基于对自由基捕获实验的观察,提出了通过自由基过程进行转化的方法。