Controlling the Cleavage of Carbon–Carbon Bonds To Generate α,α-Difluorobenzyl Carbanions for the Construction of Difluoromethylbenzenes
作者:Hari R. Khatri、Changho Han、Erica Luong、Xiaoliang Pan、Amna T. Adam、Maali D. Alshammari、Yihan Shao、David A. Colby
DOI:10.1021/acs.joc.9b01595
日期:2019.9.20
The initiating reagent is potassium carbonate, which represents an improvement over existing protocols that require a strong base. Fragmentation studies across substituted arenes and heteroarenes were conducted along with computational analyses to elucidate reactivity trends. Furthermore, the mildly generated α,α-difluorobenzyl carbanions from electron-deficient aromatics and heteroaromatic rings can
在化学反应过程中控制碳-碳键的断裂是一项重大挑战。然而,实现这一目标的合成方法会产生有价值且通常未经探索的反应性。我们设计了一种温和的方法,通过利用三氟乙酸盐释放过程中 C-C 键的断裂,在碳酸钾存在下生成 α,α-二氟苄基碳负离子。引发剂是碳酸钾,它代表了对需要强碱的现有协议的改进。对取代芳烃和杂芳烃的碎片研究进行了计算分析,以阐明反应趋势。此外,温和生成的α,