Alkylation of in situ generated imines via photoactivation of strong aliphatic C-H bonds
作者:Serena Pillitteri、Prabhat Ranjan、Leonid G. Voskressensky、Erik V. Van der Eycken、Upendra K. Sharma
DOI:10.1016/j.mcat.2021.111841
日期:2021.9
on the development of a broadly applicable strategy for the alkylation of in situ formed imines for the construction of functionalized secondary amines under mild reaction conditions. This atom economic transformation exploits the intrinsic electrophilicity of imines towards radical addition, and the fine-tuning of electronic properties of the starting materials allows the formation of a wide variety
Dual Acridine/Decatungstate Photocatalysis for the Decarboxylative Radical Addition of Carboxylic Acids to Azomethines
作者:Zakhar M. Rubanov、Vitalij V. Levin、Alexander D. Dilman
DOI:10.1021/acs.orglett.4c00778
日期:2024.4.19
A concept for the dual use of acridine and tetrabutylammonium decatungstate photocatalysts in the reactions of carboxylic acids is proposed. Imines generated in situ from aldehydes and p-methoxyaniline, as well as other azomethines, were used as radical acceptors. The role of the decatungstate is believed to facilitate the turnover of the acridine photocatalyst by means of hydrogen atom transfer.
作者:Sui, Xianwei、Dang, Hang T.、Porey, Arka、Trevino, Ramon、Das, Arko、Fremin, Seth O.、Hughes, William B.、Thompson, William T.、Dhakal, Shree Krishna、Arman, Hadi D.、Larionov, Oleg V.
DOI:10.1039/d4sc02356k
日期:——
photocatalytic tricomponent decarboxylative radical-mediated amine construction that enables modular access to α-branched secondaryamines directly from the broad and structurally diverse chemical space of carboxylic acids in a tricomponent reaction with aldehydes and aromatic amines. Our studies reveal the key role of acridine photocatalysis acting in concert with copper and Brønsted acid catalytic processes
variety of N-arylamines, aldehydes, and hydrocarbons have been examined as reaction substrates using tetrabutylammonium decatungstate as photocatalyst, providing the corresponding α-branched tertiary and secondary amines in good to moderate yields. The reaction proceeds through the generation of alkyl radicals by a light-promoted hydrogen atom transfer process followed by free radical addition to iminium