Explore the words cloud of the PHAROS project. It provides you a very rough idea of what is the project "PHAROS" about.
The following table provides information about the project.
|Coordinator Country||Germany [DE]|
|Total cost||2˙458˙200 €|
|EC max contribution||2˙458˙200 € (100%)|
1. H2020-EU.1.1. (EXCELLENT SCIENCE - European Research Council (ERC))
|Duration (year-month-day)||from 2017-09-01 to 2022-08-31|
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|1||UNIVERSITAET REGENSBURG||DE (REGENSBURG)||coordinator||2˙458˙200.00|
Light is a fascinating reagent for chemistry as it provides energy to drive reactions, but leaves no trace. In visible light photoredox catalysis the initial electron transfer from the excited dye to a substrate yields radical anion or radical intermediates, which dominate the subsequent chemistry. Carbanions, which are the most important nucleophiles in organic chemistry, are typically not available from photocatalysis. The project PHAROS aims to overcome the current limitation of visible light photocatalysis to radical chemistry and extend its use to carbon nucleophiles. To obtain carbanions for organic synthesis using visible light, we propose three specific project tasks:
1) We develop the next generation of visible light photocatalysts extending the current energetic limit of bond activation required for carbanion generation. This task is based on our recently developed consecutive photoinduced electron transfer (conPET) strategy accumulating the energy of more than one photon for synthesis. Now, the reduction power is further increased reaching potentials of alkali metals and allowing sequential two-electron transfers as needed for preparing carbanions.
2) This technology is then used to generate carbanions from neutral starting materials by visible light photoinduced one- or two-electron transfer. The concept allows a light-driven synthetic carbanion chemistry without the stoichiometric use of reducing reagents, such as magnesium, zinc or lithium.
3) Faster and cleaner reactions, longer catalyst lifetimes and selective photocatalytic sequences are achieved by sensitized photocatalysts and pulsed light excitation. This will enhance the overall energy efficiency of photoredox catalysis facilitating practical applications.
The energy of visible light provides the redox energy to generate carbanions for organic synthesis and thereby broadens the synthetic use of the most abundant and sustainable energy source on earth, visible light.
|year||authors and title||journal||last update|
Anamitra Chatterjee, Burkhard KÃ¶nig
Birchâ€Type Photoreduction of Arenes and Heteroarenes by Sensitized Electron Transfer
published pages: 14289-14294, ISSN: 1433-7851, DOI: 10.1002/anie.201905485
|Angewandte Chemie International Edition 58/40||2020-04-24|
Indrajit Ghosh, Jagadish Khamrai, Aleksandr Savateev, Nikita Shlapakov, Markus Antonietti, Burkhard KÃ¶nig
Organic semiconductor photocatalyst can bifunctionalize arenes and heteroarenes
published pages: 360-366, ISSN: 0036-8075, DOI: 10.1126/science.aaw3254
Karsten Donabauer, Mitasree Maity, Anna Lucia Berger, Gregory S. Huff, Stefano Crespi, Burkhard KÃ¶nig
Photocatalytic carbanion generation â€“ benzylation of aliphatic aldehydes to secondary alcohols
published pages: 5162-5166, ISSN: 2041-6520, DOI: 10.1039/c9sc01356c
|Chemical Science 10/19||2020-04-24|
Martin Jakubec, Indrajit Ghosh, Jan Storch, Burkhard KÃ¶nig
Photochemical Functionalization of Helicenes
published pages: 543-547, ISSN: 0947-6539, DOI: 10.1002/chem.201904169
|Chemistry â€“ A European Journal 26/2||2020-04-24|
Shun Wang, Bei-Yi Cheng, Matea SrÅ¡en, Burkhard KÃ¶nig
Umpolung Difunctionalization of Carbonyls via Visible-Light Photoredox Catalytic Radical-Carbanion Relay
published pages: , ISSN: 0002-7863, DOI: 10.1021/jacs.0c00629
|Journal of the American Chemical Society||2020-04-24|
Tanguy Saget, Burkhard KÃ¶nig
Photocatalytic Synthesis of Polycyclic Indolones
published pages: , ISSN: 0947-6539, DOI: 10.1002/chem.202001324
|Chemistry - A European Journal||2020-04-24|
Joshua P. Barham, Burkhard KÃ¶nig
published pages: , ISSN: 1433-7851, DOI: 10.1002/anie.201913767
|Angewandte Chemie International Edition||2020-04-24|
Anna Lucia Berger, Karsten Donabauer, Burkhard KÃ¶nig
Photocatalytic carbanion generation from Câ€“H bonds â€“ reductant free Barbier/Grignard-type reactions
published pages: 10991-10996, ISSN: 2041-6520, DOI: 10.1039/c9sc04987h
|Chemical Science 10/48||2020-04-24|
Qing-Yuan Meng, Tobias E. Schirmer, Anna Lucia Berger, Karsten Donabauer, Burkhard KÃ¶nig
Photocarboxylation of Benzylic Câ€“H Bonds
published pages: 11393-11397, ISSN: 0002-7863, DOI: 10.1021/jacs.9b05360
|Journal of the American Chemical Society 141/29||2020-04-24|
Qing-Yuan Meng, Tobias Schirmer, Kousuke Katou, Burkhard KÃ¶nig
Controllable Isomerization of Alkenes by Dual Visible-Light-Cobalt Catalysis
published pages: , ISSN: 1433-7851, DOI: 10.1002/anie.201900849
|Angewandte Chemie International Edition||2019-04-18|
Veera Reddy Yatham, Peter Bellotti, Burkhard KÃ¶nig
Decarboxylative hydrazination of unactivated carboxylic acids by cerium photocatalysis
published pages: 3489-3492, ISSN: 1359-7345, DOI: 10.1039/c9cc00492k
|Chemical Communications 55/24||2019-04-18|
Shun Wang, Lokesh Nanjundappa, Johnny Hioe, Ruth Maria Gschwind, Burkhard Koenig
Photoinitiated Carbonyl-Metathesis: Deoxygenative Reductive Olefination of Aromatic Aldehydes via Photoredox Catalysis
published pages: , ISSN: 2041-6520, DOI: 10.1039/c9sc00711c
Anna Lucia Berger, Karsten Donabauer, Burkhard KÃ¶nig
Photocatalytic Barbier reaction â€“ visible-light induced allylation and benzylation of aldehydes and ketones
published pages: 7230-7235, ISSN: 2041-6520, DOI: 10.1039/c8sc02038h
|Chemical Science 9/36||2019-04-18|
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