Skip to main content
U.S. Department of Energy
Office of Scientific and Technical Information

A Unified Approach to Decarboxylative Halogenation of (Hetero)aryl Carboxylic Acids

Journal Article · · Journal of the American Chemical Society
DOI:https://doi.org/10.1021/jacs.2c02392· OSTI ID:1865855
Aryl halides are a fundamental motif in synthetic chemistry, playing a critical role in metal-mediated cross-coupling reactions and serving as important scaffolds in drug discovery. Although thermal decarboxylative functionalization of aryl carboxylic acids has been extensively explored, the scope of existing halodecarboxylation methods remains limited, and there currently exists no unified strategy that provides access to any type of aryl halide from an aryl carboxylic acid precursor. Herein, we report a general catalytic method for direct decarboxylative halogenation of (hetero)aryl carboxylic acids via ligand-to-metal charge transfer. This strategy accommodates an exceptionally broad scope of substrates. Here, we leverage an aryl radical intermediate toward divergent functionalization pathways: (1) atom transfer to access bromo- or iodo(hetero)arenes or (2) radical capture by copper and subsequent reductive elimination to generate chloro- or fluoro(hetero)arenes. The proposed ligand-to-metal charge transfer mechanism is supported through an array of spectroscopic studies.
Research Organization:
North Carolina State Univ., Raleigh, NC (United States); Princeton Univ., NJ (United States)
Sponsoring Organization:
NIH; National Institute of General Medical Sciences (NIGMS); USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
SC0019370
OSTI ID:
1865855
Journal Information:
Journal of the American Chemical Society, Journal Name: Journal of the American Chemical Society Journal Issue: 18 Vol. 144; ISSN 0002-7863
Publisher:
American Chemical Society (ACS)Copyright Statement
Country of Publication:
United States
Language:
English

References (50)

Industrial-Scale Palladium-Catalyzed Coupling of Aryl Halides and Amines –A Personal Account journal January 2006
Copper-Catalyzed Protodecarboxylation of Aromatic Carboxylic Acids journal October 2007
Photocatalytic C−C Bond Cleavage and Amination of Cycloalkanols by Cerium(III) Chloride Complex journal November 2016
Visible‐Light‐Induced Homolysis of Earth‐Abundant Metal‐Substrate Complexes: A Complementary Activation Strategy in Photoredox Catalysis journal June 2021
Decarboxylative Hydroxylation of Benzoic Acids journal October 2021
Comparative Study of Copper- and Silver-Catalyzed Protodecarboxylations of Carboxylic Acids journal April 2010
Decarboxylative C-C and C-N Bond Formation by Ligand-Accelerated Iron Photocatalysis: Decarboxylative C-C and C-N Bond Formation by Ligand-Accelerated Iron Photocatalysis journal October 2019
Radical decarboxylative bromination of aromatic acids journal January 1985
Single Electron Activation of Aryl Carboxylic Acids journal July 2020
Pd(II)-catalyzed bromo- and chlorodecarboxylation of electron-rich arenecarboxylic acids journal June 2013
Decarboxylative Halogenation of Organic Compounds journal November 2020
Enhancing the Visible-Light Absorption and Excited-State Properties of Cu(I) MLCT Excited States journal February 2018
Decarboxylative Halogenation and Cyanation of Electron-Deficient Aryl Carboxylic Acids via Cu Mediator as Well as Electron-Rich Ones through Pd Catalyst under Aerobic Conditions journal March 2016
Direct Evidence of Visible Light-Induced Homolysis in Chlorobis(2,9-dimethyl-1,10-phenanthroline)copper(II) journal June 2020
Copper-Mediated C–X Functionalization of Aryl Halides journal November 2017
Intramolecular Aromatic C–H Acyloxylation Enabled by Iron Photocatalysis journal January 2020
Bond Dissociation Energies of Organic Molecules journal April 2003
Fluorine in Pharmaceutical Industry: Fluorine-Containing Drugs Introduced to the Market in the Last Decade (2001–2011) journal December 2013
Copper(II) chloride complex equilibrium constants journal October 1983
Photochemical properties of copper(II)-amino acid complexes journal November 1981
Photochemistry of the copper(II)-malonate system. Sensitized reaction journal April 1972
Spectroscopic and kinetic characteristics of aroyloxyl radicals. 1. The 4-methoxybenzoyloxyl radical journal April 1988
Spectroscopic and kinetic characteristics of aroyloxyl radicals. 2. Benzoyloxyl and ring-substituted aroyloxyl radicals journal April 1988
Radicals and scavengers. 7. Diffusion controlled scavenging of phenyl radicals and absolute rate constants of several phenyl radical reactions journal November 1977
Photolyses of Metal Compounds: Cupric Chloride in Organic Media journal June 1962
Copper-Catalyzed Aerobic Oxidative Functionalization of an Arene C−H Bond: Evidence for an Aryl-Copper(III) Intermediate journal September 2010
NHC-Copper Mediated Ligand-Directed Radiofluorination of Aryl Halides journal April 2020
Copper Catalyzed C(sp 3 )–H Bond Alkylation via Photoinduced Ligand-to-Metal Charge Transfer journal February 2021
Radical Decarboxylative Carbometalation of Benzoic Acids: A Solution to Aromatic Decarboxylative Fluorination journal April 2021
Direct C(sp 3 )–H Cross Coupling Enabled by Catalytic Generation of Chlorine Radicals journal September 2016
Transition-Metal-Free Decarboxylative Iodination: New Routes for Decarboxylative Oxidative Cross-Couplings journal August 2017
Principles and Applications of Halogen Bonding in Medicinal Chemistry and Chemical Biology journal January 2013
Reaction pathway in the modified Hunsdiecker reaction journal February 1972
Silver-Catalyzed Protodecarboxylation of Heteroaromatic Carboxylic Acids journal November 2009
High-valent organometallic copper and palladium in catalysis journal April 2012
Expanding the medicinal chemistry synthetic toolbox journal August 2018
Decarboxylative cross-nucleophile coupling via ligand-to-metal charge transfer photoexcitation of Cu(ii) carboxylates journal January 2022
Chemistry informer libraries: a chemoinformatics enabled approach to evaluate and advance synthetic methods journal January 2016
The use of carboxylic acids as traceless directing groups for regioselective C–H bond functionalisation journal January 2017
Transition-metal-free decarboxylative bromination of aromatic carboxylic acids journal January 2018
Silver-catalysed protodecarboxylation of carboxylic acids journal January 2009
Direct observation of CuI/CuIII redox steps relevant to Ullmann-type coupling reactions journal January 2010
Improved Preparation of Tertiary Chlorides by Halodecarboxylation journal January 1973
Permercurated arenes. III. Syntheses of periodoarenes and perchloroarenes by Iodo- and Chloro-demercuration of some permercurated arenes journal January 1977
Mechanistic Aspects of Copper-Catalyzed Decarboxylative Coupling Reactions of (Hetero)Aryl Carboxylic Acids journal November 2016
Synthesis of Biaryls via Catalytic Decarboxylative Coupling journal August 2006
A radical approach to the copper oxidative addition problem: Trifluoromethylation of bromoarenes journal May 2018
Radical reactions of N -haloamides with olefins. XIII. Quantum yields for the photochemical addition of N -halo- N -hydroamides and N -chlorosuccinimide to 3,3-dimethyl-1-butene journal September 1987
Decarboxylation Rates of Benzoyloxyl Radicals as Determined by Laser Flash Photolysis. Further Insight into the Mechanism for Photodecomposition of Dibenzoyl Peroxides journal February 1988
Metal-Mediated Halogen Exchange in Aryl and Vinyl Halides: A Review journal April 2018

Figures / Tables (8)


Similar Records

Mechanistic Investigation into the Decarboxylation of Aromatic Carboxylic Acids
Conference · Sun Aug 22 00:00:00 EDT 1999 · OSTI ID:7910

Copper(ii)-photocatalyzed decarboxylative oxygenation of carboxylic acids
Journal Article · Tue Feb 15 19:00:00 EST 2022 · ChemComm · OSTI ID:1863588

Free radicals in an Adamantane matrix. XI. Electron paramagnetic resonance study of conformations in the $beta$-halo-tert-butyl radicals
Journal Article · Wed Oct 15 00:00:00 EDT 1975 · J. Am. Chem. Soc., v. 97, no. 21, pp. 5986-5992 · OSTI ID:4166116