1
|
Lu H, Wan Y, Wang Q, Li Y, Wu H, Ma N, Zhang Z, Zhang G. Aerobic Oxidative Hydroxylation of Arylboronic Acids under Visible-Light Irradiation without Metal Catalysts or Additives. Org Lett 2024; 26:1959-1964. [PMID: 38407134 DOI: 10.1021/acs.orglett.4c00436] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/27/2024]
Abstract
Phenols are versatile synthetic intermediates and key structural motifs in many natural products and biologically active compounds. We herein report a visible-light-induced aerobic oxidative hydroxylation of arylboronic acids/pinacol esters using air as oxidant and without using any catalysts and base, etc., additives, providing a green entry to a variety of phenols in a highly efficient and concise fashion. This novel reaction is enabled by photoactivation of an electron donor-acceptor complex, in which THF serves as both the solvent and electron donor. DFT studies indicated that the oxidation process involves a concerted hydrogen abstraction transfer from THF and dehydroxylation of boronic acid undergoing spin crossover from triplet to singlet to produce an active peroxoboronic acid intermidiate. Salient merits of this chemistry include broad substrate scope and excellent functional group tolerance, gram-scale synthesis, and versatile late-stage functionalizations as well as the use of air, visible light, and catalyst- and additive-free conditions. This strategy introduces a novel photoreaction mode with the aid of a solvent, offering a succinct and environmentally sustainable route for synthesizing phenols. The strong practicability and highly efficient access to modifying complex biorelevant molecules bode well for the potential applications of this chemistry in pharmaceutical chemistry.
Collapse
Affiliation(s)
- Hongchen Lu
- Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan 453007, China
| | - Yameng Wan
- Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan 453007, China
- School of Chemistry and Chemical Engineering, Henan University of Science and Technology, Luoyang, Henan 471023, China
| | - Qiongjin Wang
- Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan 453007, China
| | - Yabo Li
- School of Chemistry and Chemical Engineering, Henan University of Science and Technology, Luoyang, Henan 471023, China
| | - Hao Wu
- Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan 453007, China
| | - Nana Ma
- Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan 453007, China
| | - Zhiguo Zhang
- Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan 453007, China
| | - Guisheng Zhang
- Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan 453007, China
| |
Collapse
|
2
|
Sharma M, Adhikari B, Awoyemi RF, Perkins AM, Duckworth AK, Donnadieu B, Wipf DO, Stokes SL, Emerson JP. Copper(II) NHC Catalyst for the Formation of Phenol from Arylboronic Acid. CHEMISTRY (BASEL, SWITZERLAND) 2022; 4:560-575. [PMID: 38031556 PMCID: PMC10686634 DOI: 10.3390/chemistry4020040] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Indexed: 12/01/2023]
Abstract
Arylboronic acids are commonly used in modern organic chemistry to form new C-C and C-heteroatom bonds. These activated organic synthons show reactivity with heteroatoms in a range of substrates under ambient oxidative conditions. This broad reactivity has limited their use in protic, renewable solvents like water, ethanol, and methanol. Here, we report our efforts to study and optimize the activation of arylboronic acids by a copper(II) N-heterocyclic carbene (NHC) complex in aqueous solution and in a range of alcohols to generate phenol and aryl ethers, respectively. The optimized reactivity showcases the ability to make targeted C-O bonds, but also identifies conditions where water and alcohol activation could be limiting for C-C and C-heteroatom bond-forming reactions. This copper(II) complex shows strong reactivity toward arylboronic acid activation in aqueous medium at ambient temperature. The relationship between product formation and temperature and catalyst loading are described. Additionally, the effects of buffer, pH, base, and co-solvent are explored with respect to phenol and ether generation reactions. Characterization of the new copper(II) NCN-pincer complex by X-ray crystallography, HR-MS, cyclic voltammetry, FT-IR and UV-Vis spectral studies is reported.
Collapse
Affiliation(s)
- Mitu Sharma
- Department of Chemistry, Mississippi State University, Mississippi State, MS 39762-9573, USA
| | - Bhupendra Adhikari
- Department of Chemistry, Mississippi State University, Mississippi State, MS 39762-9573, USA
| | - Raymond Femi Awoyemi
- Department of Chemistry, Mississippi State University, Mississippi State, MS 39762-9573, USA
| | - Amanda M. Perkins
- Department of Chemistry, Mississippi State University, Mississippi State, MS 39762-9573, USA
| | - Alison K. Duckworth
- Department of Chemistry, Mississippi State University, Mississippi State, MS 39762-9573, USA
| | - Bruno Donnadieu
- Department of Chemistry, Mississippi State University, Mississippi State, MS 39762-9573, USA
| | - David O. Wipf
- Department of Chemistry, Mississippi State University, Mississippi State, MS 39762-9573, USA
| | - Sean L. Stokes
- Department of Chemistry, Mississippi State University, Mississippi State, MS 39762-9573, USA
| | - Joseph P. Emerson
- Department of Chemistry, Mississippi State University, Mississippi State, MS 39762-9573, USA
| |
Collapse
|
3
|
Kwon G, Joo S, Park S, Kim S. Choline Hydroxide as a Versatile Medium for Catalyst‐Free
O
‐Functionalization of Phenols. B KOREAN CHEM SOC 2020. [DOI: 10.1002/bkcs.12138] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Gyu‐Tae Kwon
- Department of Chemistry Dankook University, 119 Dandaero Cheonan Korea 31116
| | - Seong‐Ryu Joo
- Department of Chemistry Dankook University, 119 Dandaero Cheonan Korea 31116
| | - Soo‐Youl Park
- Korea Research Institute of Chemical Technology Daejeon Korea 34114
| | - Seung‐Hoi Kim
- Department of Chemistry Dankook University, 119 Dandaero Cheonan Korea 31116
| |
Collapse
|
4
|
Elumalai V, Hansen JH. A scalable and green one-minute synthesis of substituted phenols. RSC Adv 2020; 10:40582-40587. [PMID: 35520826 PMCID: PMC9057563 DOI: 10.1039/d0ra08580d] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2020] [Accepted: 10/23/2020] [Indexed: 12/23/2022] Open
Abstract
A mild, green and highly efficient protocol was developed for the synthesis of substituted phenols via ipso-hydroxylation of arylboronic acids in ethanol. The method utilizes the combination of aqueous hydrogen peroxide as the oxidant and H2O2/HBr as the reagent under unprecedentedly simple and convenient conditions. A wide range of arylboronic acids were smoothly transformed into substituted phenols in very good to excellent yields without chromatographic purification. The reaction is scalable up to at least 5 grams at room temperature with one-minute reaction time and can be combined in a one-pot sequence with bromination and Pd-catalyzed cross-coupling to generate more diverse, highly substituted phenols.
Collapse
Affiliation(s)
- Vijayaragavan Elumalai
- UiT The Arctic University of Norway, Department of Chemistry, Chemical Synthesis and Analysis Group N9037 Tromsø Norway
| | - Jørn H Hansen
- UiT The Arctic University of Norway, Department of Chemistry, Chemical Synthesis and Analysis Group N9037 Tromsø Norway
| |
Collapse
|
5
|
Oxidative Hydroxylation of Aryl Boronic Acid Catalyzed by Co-porphyrin Complexes via Blue-Light Irradiation. Catalysts 2020. [DOI: 10.3390/catal10111262] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Oxidative reactions often require unstable and environmentally harmful oxidants; therefore, the investigation of safer alternatives is urgent. Here, the hydroxylation of aryl boronic acid in the presence of Co-complexes is demonstrated. Tetrakis(4-carboxyphenyl) Co(II)-porphyrin was combined with biodegradable polymers such as chitosan catalyzed hydroxylation of phenyl boronic acids to form phenol derivatives under blue-light irradiation. This catalytic system can be used as an eco-friendly oxidation process that does not release oxidizing agents into the atmosphere.
Collapse
|
6
|
Li Y, Guo M, Wen Y, Zhou L, Shen X, Kang Y. Synthesis of aryloxyacetonitriles based on arylboronic acids with 2-bromoacetonitrile. Tetrahedron Lett 2020. [DOI: 10.1016/j.tetlet.2020.152331] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
|
8
|
Yu K, Zhang H, Sheng Y, Zhu Y. Visible-light-promoted aerobic oxidative hydroxylation of arylboronic acids in water by hydrophilic organic semiconductor. Tetrahedron Lett 2020. [DOI: 10.1016/j.tetlet.2020.152010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
|
9
|
Hao L, Ding G, Deming DA, Zhang Q. Recent Advances in Green Synthesis of Functionalized Phenols from Aromatic Boronic Compounds. European J Org Chem 2019. [DOI: 10.1002/ejoc.201901303] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Leiduan Hao
- Department of Chemistry; Washington State University; 99164 Pullman Washington USA
| | - Guodong Ding
- Department of Chemistry; Washington State University; 99164 Pullman Washington USA
| | - Derek A. Deming
- Department of Chemistry; Washington State University; 99164 Pullman Washington USA
| | - Qiang Zhang
- Department of Chemistry; Washington State University; 99164 Pullman Washington USA
- Materials Science and Engineering Program; Washington State University; 99164 Pullman Washington USA
| |
Collapse
|