Highly Site-Selective Direct C–H Bond Functionalization of Unactivated Arenes with Propargyl α-Aryl-α-diazoacetates via Scandium Catalysis
作者:Balu S. Navale、Debasish Laha、Subhrashis Banerjee、Kumar Vanka、Ramakrishna G. Bhat
DOI:10.1021/acs.joc.2c01185
日期:2022.11.4
Highly chemo- and regio-selective C–H bond functionalization of unactivated arenes with propargyl α-aryl-α-diazoacetates has been developed using scandium catalysis. A variety of unactivated, mildly deactivated, and electronically activated arenes have been functionalized using this protocol. The synergistic combination of scandium triflate as a catalyst and propargyl α-aryl-α-diazoacetate as a reagent
已经使用钪催化开发了具有炔丙基α-芳基-α-重氮乙酸酯的未活化芳烃的高度化学和区域选择性C-H键官能化。使用该协议已对各种未激活、轻度失活和电子激活的芳烃进行了功能化。三氟甲磺酸钪作为催化剂和炔丙基α-芳基-α-重氮乙酸酯作为试剂的协同组合在芳烃的有效C-H键官能化中发挥了关键作用,而无需任何导向基团或配体的帮助。该协议的实用性已通过非常有用的 α、α-二芳基乙酸酯(包括抗痉挛药物阿迪芬)的克级合成得到证明。基于实验观察、标记实验和密度泛函理论计算,概述了一种合理的反应机理。