Photoinduced decarboxylative borylation of carboxylic acids
作者:Alexander Fawcett、Johan Pradeilles、Yahui Wang、Tatsuya Mutsuga、Eddie L. Myers、Varinder K. Aggarwal
DOI:10.1126/science.aan3679
日期:2017.7.21
283 Light facilitates the replacement of carboxylic acids with boron esters in the absence of metal catalysts. The conversion of widely available carboxylic acids into versatile boronic esters would be highly enabling for synthesis. We found that this transformation can be effected by illuminating the N-hydroxyphthalimide ester derivative of the carboxylic acid under visible light at room temperature
Photoredox-Catalyzed Decarboxylative Alkylation of Silyl Enol Ethers To Synthesize Functionalized Aryl Alkyl Ketones
作者:Weiguang Kong、Changjiang Yu、Hejun An、Qiuling Song
DOI:10.1021/acs.orglett.7b03587
日期:2018.1.19
Photoredox-catalyzed decarboxylative alkylation of silylenolethers has been developed. Diverse functionalized arylalkylketones were afforded in modest to good yields using N-(acyloxy)phthalimide as an easy access alkyl radical source under mild and operationally simple conditions. The excellent performance of drug molecules such as fenbufen and indomethacin and naturally occurring carboxylic acids
Photoredox-catalyzed decarboxylative alkylation/cyclization of alkynylphosphine oxides: a metal- and oxidant-free method for accessing benzo[<i>b</i>]phosphole oxides
By photoredox-catalysis, alkylation/aryl cyclization of alkynylphosphine oxides towards benzo[b]phospholes has been realized under metal- and oxidant-free conditions at room temperature.
通过光氧化催化,在室温无金属和氧化剂条件下,实现了炔膦氧化物向苯并[b]膦的烷基化/芳基环化。
Metal-free, visible-light-mediated, decarboxylative alkylation of biomass-derived compounds
作者:Johanna Schwarz、Burkhard König
DOI:10.1039/c6gc01101b
日期:——
This work describes a mild, environmentally friendly method to activate natural carboxylic acids for decarboxylativealkylation. After esterification of biomass-derived acids to N-(acyloxy)phthalimides, the active esters are cleaved reductively by...
Vinyl Sulfonium Salts as the Radical Acceptor for Metal-Free Decarboxylative Alkenylation
作者:Yu-Lan Zhang、Lei Yang、Jie Wu、Chunyin Zhu、Peng Wang
DOI:10.1021/acs.orglett.0c03074
日期:2020.10.2
Vinyl sulfonium salts typically act as an electrophilic Michael acceptor, thus initiating many tandem cyclization reactions. Herein, we disclosed the novel reactivity of vinyl sulfonium salts as a radical acceptor. Using redox-active ester as an alkyl radical precursor, metal-free decarboxylative alkenylation with vinyl sulfonium salts was realized using eosin Y as a photocatalyst. This process features