Copper‐Catalyzed Arylation of Remote C(sp
<sup>3</sup>
)−H Bonds in Carboxamides and Sulfonamides
作者:Zhaodong Li、Qian Wang、Jieping Zhu
DOI:10.1002/anie.201807623
日期:2018.10
Reported herein is an unprecedented copper‐catalyzed arylation of remote C(sp3)−H bonds. Stirring a trifluorotoluene solution of either N‐fluorocarboxamides or N‐fluorosulfonamides and arylboronic acids in the presence of a catalytic amount of copper(II) trifluoroacetylacetonate, 2,2′‐bipyridine, and sodium tert‐butoxide afforded the γ‐ and δ‐C(sp3)−H arylated carboxamides and sulfonamides, respectively
本文报道的是远端C(sp 3)-H键的铜催化芳基化作用。在催化量的三氟乙酰丙酮铜(II),2,2'-联吡啶和叔丁醇钠存在下,搅拌N-氟甲酰胺或N-氟磺酰胺和芳基硼酸的三氟甲苯溶液,得到γ-和δ-C (sp 3)-H芳基化羧酰胺和磺酰胺,分别具有良好或高收率。机理研究表明,该反应可能通过生成酰胺基,进行1,5-氢原子转移(HAT)以及铜催化的碳原子与芳基硼酸的交叉偶联来进行。