Transformations of Aryl Ketones via Ligand‐Promoted C−C Bond Activation
作者:Hanyuan Li、Biao Ma、Qi‐Sheng Liu、Mei‐Ling Wang、Zhen‐Yu Wang、Hui Xu、Ling‐Jun Li、Xing Wang、Hui‐Xiong Dai
DOI:10.1002/anie.202006740
日期:2020.8.17
The coupling of aromatic electrophiles (aryl halides, aryl ethers, aryl acids, aryl nitriles etc.) with nucleophiles is a core methodology for the synthesis of aryl compounds. Transformations of arylketones in an analogous manner via carbon–carbon bond activation could greatly expand the toolbox for the synthesis of aryl compounds due to the abundance of arylketones. An exploratory study of this
Transition-Metal-Free, Visible-Light-Enabled Decarboxylative Borylation of Aryl <i>N</i>-Hydroxyphthalimide Esters
作者:Lisa Candish、Michael Teders、Frank Glorius
DOI:10.1021/jacs.7b03127
日期:2017.6.7
Herein, we report a conceptually novel borylation reaction proceeding via a mild photoinduced decarboxylation of redox-activated aromatic carboxylic acids. This work constitutes the first application of cheap and easily prepared N-hydroxyphthalimideesters as aryl radical precursors and does not require the use of expensive transition metals or ligands. The reaction is operationally simple, scalable
Cleavage of C(aryl)−CH
<sub>3</sub>
Bonds in the Absence of Directing Groups under Transition Metal Free Conditions
作者:Peng‐Fei Dai、Xiao‐Shan Ning、Hua Wang、Xian‐Chao Cui、Jie Liu、Jian‐Ping Qu、Yan‐Biao Kang
DOI:10.1002/anie.201901783
日期:2019.4.8
carbon–carbon σ‐bonds, especially for unreactive hydrocarbons, remain limited. Activation by ring strain, directing groups, or in the presence of a carbonyl or a cyano group is usually required. In this work, by using a sequential strategy site‐selective cleavage and borylation of C(aryl)−CH3 bonds has been developed under directing group free and transitionmetalfree conditions. Methyl groups of various arenes
Rh‐Catalyzed Direct Decarbonylative Borylation of Carboxylic Acids
作者:Chang Yin、Yanjing Liao、Bangyue He、Hongyi Li、Weiping Su
DOI:10.1002/chem.202300184
日期:——
The Rh catalyzed method for directdecarbonylative borylation of carboxylicacid has been developed. This protocol exhibits a wide scope, is scalable and successfully used to late-stage diversification of many carboxylicacid containing drugs. One-pot borylation/derivatization reaction was also achieved and may open the door to explore new transformation from carboxylicacid.