Reported herein is a visible‐light‐mediated radical approach to the α‐alkylation of ketones. This method exploits the ability of a nucleophilic organocatalyst to generate radicals upon SN2‐based activation of alkyl halides and blue light irradiation. The resulting open‐shell intermediates are then intercepted by weakly nucleophilic silyl enol ethers, which would be unable to directly attack the alkyl
Cyanomethylation of Substituted Fluorenes and Oxindoles with Alkyl Nitriles
作者:Gang Hong、Pradip D. Nahide、Marisa C. Kozlowski
DOI:10.1021/acs.orglett.0c00160
日期:2020.2.21
cyanomethylenation from alkyl nitriles of sp3 C–H bonds to afford quaternary carbon centers is described. This oxidative protocol is operationally simple and features good functional group compatibility. This method provides a novel approach to highly functionalized fluorene and oxindole derivatives, which are commonly used in material and pharmaceutical areas. Control experiments provide evidence of a radical
Oxidative three-component 1,2-alkylarylation of alkenes with alkyl nitriles and N-heteroarenes
作者:Xuan-Hui Ouyang、Ming Hu、Ren-Jie Song、Jin-Heng Li
DOI:10.1039/c8cc06509h
日期:——
An indium-promoted intermolecular oxidative 1,2-alkylarylation of alkenes with alkylnitriles and N-heteroarenes enabled by C(sp3)–H/C(sp2)–Hfunctionalization is presented. This oxidative radical strategy allows the formation of two new C–C bonds through transformations of two different C–H bonds across the alkenes in a controlled single-step manner, and offers a general, highly atom-economic route
提出了通过C(sp 3)–H / C(sp 2)–H官能化作用实现的烯烃与烷基腈和N-杂芳烃的铟促进的分子间氧化1,2-烷基芳基化反应。这种氧化自由基策略允许通过可控的单步方式,通过烯烃上两个不同的C–H键的转变形成两个新的C–C键,并为生产新的功能化化合物提供了一条通用的,高度原子经济的途径N-杂芳烃,包括吲哚,吡咯并[2,3- b ]吡啶,吡咯并[3,2,1- ij ]喹诺酮和吡咯。
Synthesis of Functionalized Epoxides by Copper-Catalyzed Alkylative Epoxidation of Allylic Alcohols with Alkyl Nitriles
作者:Ala Bunescu、Qian Wang、Jieping Zhu
DOI:10.1021/acs.orglett.5b00571
日期:2015.4.17
A copper-catalyzed oxyalkylation of allylic alcohols using nonactivated alkyl nitriles as reaction partners was developed. A sequence involving generation of an alkyl nitrile radical followed by its addition to a double bond and a copper-mediated formation of C(sp3)–O bond was proposed to account for the reaction outcome. The protocol provided an efficient route to functionalized tri- and tetrasubstituted
<i>γ</i>-Amino Butyric Acid (GABA) Synthesis Enabled by Copper-Catalyzed Carboamination of Alkenes
作者:Nengbo Zhu、Ting Wang、Liang Ge、Yajun Li、Xinhao Zhang、Hongli Bao
DOI:10.1021/acs.orglett.7b01969
日期:2017.9.15
γ-Amino butyric acid (GABA) is the chief inhibitory neurotransmitter in the mammalian central nervous system. Many GABA derivatives are used clinically to prevent or treat neurodegenerative diseases. Copper-catalyzed carboamination of alkenes offers an efficientmethod to fashion the core structure of GABA derivatives from alkenes. In this reaction, acetonitrile serves as the source of the carbon and