Chemoselective <i>N</i>- and <i>O</i>-Difluoromethylation of 2-Pyridones, Isoquinolinones, and Quinolinones with TMSCF<sub>2</sub>Br
作者:Ziyue Zhu、Vinayak Krishnamurti、Xanath Ispizua-Rodriguez、Colby Barrett、G. K. Surya Prakash
DOI:10.1021/acs.orglett.1c02305
日期:2021.8.20
An operationally simple protocol for direct N- and O-difluoromethylation of 2-pyridones, quinolinones, and isoquinolinones using commercially available TMSCF2Br is disclosed. The chemoselectivity is modulated by simple variations in temperature, solvent, and strength of the base. Diverse, synthetically relevant functional groups are tolerated, including functional groups that have reported reactivity
公开了使用可商购的 TMSCF 2 Br直接对 2-吡啶酮、喹啉酮和异喹啉酮进行N-和O-二氟甲基化的操作简单的方案。化学选择性通过温度、溶剂和碱强度的简单变化来调节。可以耐受多种合成相关的官能团,包括已报告与 TMSCF 2 Br反应的官能团。包括制备N - 和O - 二氟甲基化合物的克级反应。