Ru(II)/Rh(III)-Catalyzed C(sp<sup>3</sup>)–C(sp<sup>3</sup>) Bond Formation through C(sp<sup>3</sup>)–H Activation: Selective Linear Alkylation of 8-Methylquinolines and Ketoximes with Olefins
作者:Rohit Kumar、Rakesh Kumar、Diksha Parmar、Shiv Shankar Gupta、Upendra Sharma
DOI:10.1021/acs.joc.9b03257
日期:2020.1.17
Herein, [RuCl2(p-cymene)]2/[Cp*RhIIICl2]2-catalyzed direct alkylation of C(sp3)-H bond of 8-methylquinolines with olefins (acrylates, styrenes, and aliphatic) is reported. The alkylation also proceeds with other conjugated systems such as malemides and α,β-unsaturated ketones. The reaction is highly regioselective, forms only a linear product, and tolerates a variety of functional groups on quinoline
在本文中,报道了[RuCl 2(对异丙基)] 2 / [Cp * RhIIICl 2] 2催化的8-甲基喹啉的C(sp3)-H键与烯烃(丙烯酸酯,苯乙烯和脂肪族)的直接烷基化。烷基化还与其他共轭体系(例如马来酰亚胺和α,β-不饱和酮)一起进行。该反应是高度区域选择性的,仅形成线性产物,并且耐受喹啉和烯烃部分上的多种官能团。为了初步了解反应途径,已经进行了对照实验,氘标记和动力学研究。该反应可能在氧化还原中性条件下通过五元金属环进行。还已经进行了烷基化产物的多样化和(-)-桑托宁的酮肟衍生物的后期官能化,以证明所开发方法的适用性。