Expedient Synthesis of Ketones
<i>via</i>
<scp>
<i>N</i>
‐Heterocyclic
</scp>
Carbene/
<scp>Nickel‐Catalyzed Redox‐Economical</scp>
Coupling of Alcohols and Alkynes
<sup>†</sup>
作者:Yu‐Qing Li、Feng Li、Shi‐Liang Shi
DOI:10.1002/cjoc.202000019
日期:2020.10
N‐heterocyclic carbene/nickel‐catalyzed direct coupling of alcohols and internal alkynes to form α‐branched ketones has been developed. This methodology provides a new approach to afford branched ketones, which are difficult to access through the hydroacylation of simple internal alkenes with aldehydes. This redox‐neutral and redox‐economical coupling is free from any oxidative or reductive additives
Rh‐Catalyzed Coupling of Aldehydes with Allylboronates Enables Facile Access to Ketones
作者:Kezhuo Zhang、Jiaxin Huang、Wanxiang Zhao
DOI:10.1002/chem.202103851
日期:2022.3.10
A novel strategy for the preparation of ketones from aldehydes and allylic boronic esters is presented. This reaction involves the allylation of aldehydes with allylic boronic esters and the Rh-catalyzed chain-walking of homoallylic alcohols. This approach features mild reaction conditions, broad substrate scope, and excellent functional groups. Mechanistic studies also supported that a tandem allylation
Organocatalytic C−H Functionalization of Simple Alkanes
作者:Fen Su、Fengfei Lu、Kun Tang、Xiaokang Lv、Zhongfu Luo、Fengrui Che、Hongyan Long、Xingxing Wu、Yonggui Robin Chi
DOI:10.1002/anie.202310072
日期:2023.11.6
functionalization/acylation of strong aliphatic C(sp3)-H bonds is disclosed via an N-heterocyclic carbene (NHC)-catalyzed dehydrogenative coupling of aldehydes with simple alkanes. The inert aliphatic C−H bonds are efficiently cleaved through intermolecular hydrogen atom transfer, providing an alternative organocatalytic approach for alkane C−H functionalization under transition metal- and light free