The electrochemical three‐componentassembly of isoquinolines has been accomplished by ruthenaelectro‐catalyzed C−H/N−H functionalization. The robustness of the electrocatalysis was reflected by an ample substrate scope, an efficient electrooxidation, and an operationally friendly procedure. The isolation of key intermediates and detailed mechanistic studies, including unprecedented cyclovoltammetric
异喹啉的电化学三组分组装已通过钌电子催化的CH / NH官能团完成。电催化的坚固性通过足够的底物范围,有效的电氧化作用和操作友好的程序得以体现。关键中间体的分离和详细的机理研究,包括对七元钌循环的前所未有的循环伏安分析,为不寻常的钌(II / III / I)机制提供了支持。
Cp*Co(III)-Catalyzed C–H Alkylation with Maleimides Using Weakly Coordinating Carbonyl Directing Groups
A novel protocol for ortho-C–H alkylation of aromatic and heteroaromatic ketones and esters under Cp*Co(III) catalysis has been developed for the first time. The reaction proceeds through initial cyclometalation via weak chelation-assisted C–H bond activation, followed by coordination of activated alkene, insertion between Co–C, and protodemetalation.
Iron-Catalyzed Regioselective Anti-Markovnikov Addition of C–H Bonds in Aromatic Ketones to Alkenes
作者:Naoki Kimura、Takuya Kochi、Fumitoshi Kakiuchi
DOI:10.1021/jacs.7b08385
日期:2017.10.25
alkylation reaction, in which the coupling of aromatic ketones with alkenes proceeds in the presence of only a simple Fe(PMe3)4 catalyst. The anti-Markovnikov addition of ortho C-H bonds in various ketones occurs with excellent regioselectivity under relatively mild reaction conditions. A strikingly wide variety of alkenes can be used for this reaction, and the high-yielding anti-Markovnikov addition
Manganese-Catalyzed Aromatic C–H Allylation of Ketones
作者:Shaukat Ali、Jiaqi Huo、Congyang Wang
DOI:10.1021/acs.orglett.9b02554
日期:2019.9.6
Manganese-catalyzed aromatic C-H allylation of ketones is reported. The reaction proceeded in a monoselective allylation manner to provide various ortho C-H allylated ketones in high yields. With challenging allylic electrophiles bearing substituents at the α-, β-, or γ-position, excellent SN2' regioselectivity was achieved under mild conditions (rt to 35 °C). Mechanistic studies revealed a possible
Indium-mediated regioselective synthesis of ketones from arylstannanes under solvent-free ultrasound irradiation
作者:Marcos J. Lo Fiego、Mercedes A. Badajoz、Claudia Domini、Alicia B. Chopa、María T. Lockhart
DOI:10.1016/j.ultsonch.2012.10.018
日期:2013.5
drastically reduced (from 3-32h to 10-70min) under ultrasonic irradiation. Evidences for the involvement of a homolyticaromaticipso-substitution mechanism, in which indium metal acts as radical initiator, are presented. It is possible the transference of two aryl groups from tin, thus improving effective mass yield, working with diarylstannanes as starting substrates.