Radical Decarboxylative Fluorination of Aryloxyacetic Acids Using<i>N</i>-Fluorobenzenesulfonimide and a Photosensitizer
作者:Joe C. T. Leung、Glenn M. Sammis
DOI:10.1002/ejoc.201500038
日期:2015.4
carboxylic acids was developed that uses photosensitizers and N-fluorobenzenesulfonimide (NFSI). Utilization of the oxidatively mild fluorine transfer agent NFSI enabled the synthesis of fluoromethyl ethers that were previously inaccessible with decarboxylative fluorinations performed with Selectfluor. Mechanistic studies are consistent with the photosensitizer effecting oxidation of the aryloxyacetic acid
Continuous Heterogeneous Photocatalysis in Serial Micro-Batch Reactors
作者:Bartholomäus Pieber、Menny Shalom、Markus Antonietti、Peter H. Seeberger、Kerry Gilmore
DOI:10.1002/anie.201712568
日期:2018.7.26
leaching catalysts, and heterogeneous photocatalysts are commonly employed in batch processes but are ill‐suited for continuous‐flow chemistry. Heterogeneous catalysts for thermal reactions are typically used in packed‐bed reactors, which cannot be penetrated by light and thus are not suitable for photocatalytic reactions involving solids. We demonstrate that serial micro‐batch reactors (SMBRs) allow
C−H Fluoromethoxylation of Arenes by Photoredox Catalysis
作者:Giulia Bertoli、Ángel Manu Martínez、Jonas F. Goebel、Debora Belmonte、Nardana Sivendran、Lukas J. Gooßen
DOI:10.1002/anie.202215920
日期:2023.1.26
A new class of [N−OCH2F] redox-active reagents were synthetized via electrodecarboxylative C(sp3)−O coupling of N-hydroxybenzotriazoles with fluoroacetic acid and subsequent alkylation. By irradiation with blue LEDs in the presence of a photosensitizer, these bench stable reagents allow the synthesis of monofluoromethyl aryl ethers via functionalization of C−H bonds.
Photo-fluorodecarboxylation of 2-Aryloxy and 2-Aryl Carboxylic Acids
作者:Joe C. T. Leung、Claire Chatalova-Sazepin、Julian G. West、Montserrat Rueda-Becerril、Jean-François Paquin、Glenn M. Sammis
DOI:10.1002/anie.201206352
日期:2012.10.22
Direct C–F Bond Formation Using Photoredox Catalysis
作者:Montserrat Rueda-Becerril、Olivier Mahé、Myriam Drouin、Marek B. Majewski、Julian G. West、Michael O. Wolf、Glenn M. Sammis、Jean-François Paquin
DOI:10.1021/ja412083f
日期:2014.2.12
We have developed the first example of a photoredox catalytic method for the formation of carbon-fluorine (C-F) bonds. The mechanism has been studied using transient absorption spectroscopy and involves a key single-electron transfer from the (MLCT)-M-3 (triplet metal-to-ligand charge transfer) state of Ru(bpy)(3)(2+) to Selectfluor. Not only does this represent a new reaction for photoredox catalysis, but the mild reaction conditions and use of visible light also make it a practical improvement over previously developed UV-mediated decarboxylative fluorinations.