Ketone–Olefin Coupling of Aliphatic and Aromatic Carbonyls Catalyzed by Excited-State Acridine Radicals
作者:Nicholas J. Venditto、Yiyang S. Liang、Roukaya K. El Mokadem、David A. Nicewicz
DOI:10.1021/jacs.2c04822
日期:2022.7.6
easily reducible aromaticcarbonyl compounds. Herein, we describe a mild, metal-free ketone–olefin coupling reaction using an excited-state acridine radical super reductant as a photoredox catalyst. We demonstrate both intramolecular and intermolecular ketone–olefin couplings of aliphatic and aromaticketones and aldehydes. Mechanistic evidence is also presented supporting an “olefin first” ketone–olefin
Electrochemical synthesis of 2-alkyl-4-phenylalkan-2-ols <i>via</i> cathodic reductive coupling of alkynes with unactivated aliphatic ketones
作者:Anil Balajirao Dapkekar、Gedu Satyanarayana
DOI:10.1039/d2cc06819b
日期:——
Herein, we present an efficient electrochemical method for synthesizing 2-alkyl-4-phenylalkan-2-ols through an electrochemically driven cathodic reductive coupling of the terminal and internal acetylenes with unactivated aliphatic ketones under mild conditions. The process proceeds through a ketyl radical, which then activates the aryl acetylene and causes complete reduction of the triple bond of the acetylene
Ketyl Radical Coupling Enabled by Polycyclic Aromatic Hydrocarbon Electrophotocatalysts
作者:Joseph M. Edgecomb、Sara N. Alektiar、Nicholas G. W. Cowper、Jennifer A. Sowin、Zachary K. Wickens
DOI:10.1021/jacs.3c06347
日期:2023.9.20
Herein, we report a new class of electrophotocatalysts, polycyclicaromatichydrocarbons, that promote the reduction of unactivated carbonyl compounds to generate versatile ketyl radical intermediates. This catalytic platform enables previously challenging intermolecular ketyl radical coupling reactions, including those that classic reductants (e.g., SmI2/HMPA) have failed to promote. More broadly
Cp2ZrCl2-catalyzed synthesis of aryl substituted tertiary alcohols by the reaction of aryl olefins with ketones under the action of AlCl3 and Mg
作者:Liaisan K. Dil'mukhametova、Mariya G. Shaibakova、Ilfir R. Ramazanov
DOI:10.1016/j.jorganchem.2023.122978
日期:2024.2
An efficient one-step method for the synthesis of arylsubstituted tertiary alcohols based on the reaction of aryl olefins with ketones under the action of AlCl3 and Mg in the presence of catalytic amounts of Cp2ZrCl2 was developed.