1
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Tang WY, Zheng X, Yao X, Lin JH, Zheng QT, Xiao JC. Ph 3P/ICH 2CH 2I-promoted reductive deoxygenation of alcohols. Org Biomol Chem 2023; 21:8989-8992. [PMID: 37937947 DOI: 10.1039/d3ob01698f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2023]
Abstract
Owing to the ubiquity of the hydroxyl group, reductive deoxygenation of alcohols has become an active research area. The classic Barton-McCombie reaction suffers from a tedious two-step procedure. New efficient methods have been developed, but they have some limitations, such as a narrow substrate scope and the use of moisture-sensitive Lewis acids. In this work, we describe the Ph3P/ICH2CH2I-promoted reductive deoxygenation of alcohols with NaBH4. The process is applicable to benzyl, allyl and propargyl alcohols, and also to primary and secondary alcohols, demonstrating a wide substrate scope and a good level of functional group tolerance. This protocol features convenient operation and low cost of all reagents.
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Affiliation(s)
- Wei-Ying Tang
- Institute of Pharmacy and Pharmacology, Hengyang Medicinal School, University of South China, Hengyang, Hunan, 421001, China
- Key Laboratory of Organofluorine Chemistry, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai, 200032, China.
| | - Xing Zheng
- Institute of Pharmacy and Pharmacology, Hengyang Medicinal School, University of South China, Hengyang, Hunan, 421001, China
- Department of Pharmacy, Hunan Vocational College of Science and Technology, Third Zhongyi Shan Road, Changsha, Hunan, 410004, China
| | - Xu Yao
- Institute of Pharmacy and Pharmacology, Hengyang Medicinal School, University of South China, Hengyang, Hunan, 421001, China
| | - Jin-Hong Lin
- Department of Chemistry, Innovative Drug Research Center, Shanghai University, 200444 Shanghai, China.
- Key Laboratory of Organofluorine Chemistry, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai, 200032, China.
| | - Qu-Tong Zheng
- Hunan University of Chinese Medicine, School of Pharmacy, Changsha, Hunan 410208, China.
| | - Ji-Chang Xiao
- Key Laboratory of Organofluorine Chemistry, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai, 200032, China.
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2
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Liu X, Lu M, Guo X, Xu H, Xu J. Visible-Light Enabled Dehydroxylative Alkylation of α-Hydroxy Carboxylic Acid Derivatives via C-O Bond Cleavage. Chemistry 2023; 29:e202302041. [PMID: 37507840 DOI: 10.1002/chem.202302041] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2023] [Revised: 07/28/2023] [Accepted: 07/28/2023] [Indexed: 07/30/2023]
Abstract
A novel visible-light photoredox strategy is reported for the efficient dehydroxylative alkylation of a wide array of α-hydroxy carboxylic acid derivatives using diaryl boron radical. The reaction features readily accessible starting materials, broad substrate scope with excellent functionality tolerance. Preliminary mechanistic studies reveal that the spin-center shift process is responsible for the C-O bond activation, which is promoted by the diaryl boron radical generated from bench-stable and commercially available tetraphenyl borate (NaBPh4 ).
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Affiliation(s)
- Xiaobo Liu
- School of Food and Biological Engineering, Anhui Province Key Laboratory of, Advance Catalytic Materials and Reaction Engineering, Hefei University of Technology, Hefei, 230009, P. R. China
| | - Minming Lu
- School of Food and Biological Engineering, Anhui Province Key Laboratory of, Advance Catalytic Materials and Reaction Engineering, Hefei University of Technology, Hefei, 230009, P. R. China
| | - Xiangli Guo
- School of Food and Biological Engineering, Anhui Province Key Laboratory of, Advance Catalytic Materials and Reaction Engineering, Hefei University of Technology, Hefei, 230009, P. R. China
| | - Huajian Xu
- School of Food and Biological Engineering, Anhui Province Key Laboratory of, Advance Catalytic Materials and Reaction Engineering, Hefei University of Technology, Hefei, 230009, P. R. China
| | - Jun Xu
- School of Food and Biological Engineering, Anhui Province Key Laboratory of, Advance Catalytic Materials and Reaction Engineering, Hefei University of Technology, Hefei, 230009, P. R. China
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3
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Zade VM, Gangnale LD, Athawale PR, Reddy DS. Direct Deoxygenation of α-Hydroxy and α,β-Dihydroxy Ketones Using a Silyl Lithium Reagent. J Org Chem 2023; 88:14227-14235. [PMID: 37728533 DOI: 10.1021/acs.joc.3c01613] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/21/2023]
Abstract
A reliable method for the one-step direct deoxygenation of α-hydroxy ketones has been developed using a silyl lithium reagent and acetic anhydride. The method is metal-catalyst-free and does not require prefunctionalization of the hydroxy group prior to its removal. Deoxygenation of different primary, secondary, and tertiary alcohols was carried out with up to 98% isolated yield. Additionally, double deoxygenation was achieved when the present method was applied to α,β-dihydroxy ketones to access the corresponding enones in a single step.
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Affiliation(s)
- Vishal M Zade
- Organic Chemistry Division, CSIR-National Chemical Laboratory, Dr. Homi Bhabha Road, Pune, Maharashtra 411008, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, Uttar Pradesh 201002, India
| | - Laxmikant D Gangnale
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, Uttar Pradesh 201002, India
- CSIR-Indian Institute of Chemical Technology (CSIR-IICT), Hyderabad, Telangana 500007, India
| | - Paresh R Athawale
- Organic Chemistry Division, CSIR-National Chemical Laboratory, Dr. Homi Bhabha Road, Pune, Maharashtra 411008, India
| | - D Srinivasa Reddy
- Organic Chemistry Division, CSIR-National Chemical Laboratory, Dr. Homi Bhabha Road, Pune, Maharashtra 411008, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, Uttar Pradesh 201002, India
- CSIR-Indian Institute of Chemical Technology (CSIR-IICT), Hyderabad, Telangana 500007, India
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4
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Adamovich V, Benavent L, Boudreault PLT, Esteruelas MA, López AM, Oñate E, Tsai JY. Ligand Design and Preparation, Photophysical Properties, and Device Performance of an Encapsulated-Type Pseudo-Tris(heteroleptic) Iridium(III) Emitter. Inorg Chem 2023; 62:3847-3859. [PMID: 36802562 PMCID: PMC10880055 DOI: 10.1021/acs.inorgchem.2c04106] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2022] [Indexed: 02/23/2023]
Abstract
The organic molecule 2-(1-phenyl-1-(pyridin-2-yl)ethyl)-6-(3-(1-phenyl-1-(pyridin-2-yl)ethyl)phenyl)pyridine (H3L) has been designed, prepared, and employed to synthesize the encapsulated-type pseudo-tris(heteroleptic) iridium(III) derivative Ir(κ6-fac-C,C',C″-fac-N,N',N″-L). Its formation takes place as a result of the coordination of the heterocycles to the iridium center and the ortho-CH bond activation of the phenyl groups. Dimer [Ir(μ-Cl)(η4-COD)]2 is suitable for the preparation of this compound of class [Ir(9h)] (9h = 9-electron donor hexadentate ligand), but Ir(acac)3 is a more appropriate starting material. Reactions were carried out in 1-phenylethanol. In contrast to the latter, 2-ethoxyethanol promotes the metal carbonylation, inhibiting the full coordination of H3L. Complex Ir(κ6-fac-C,C',C″-fac-N,N',N″-L) is a phosphorescent emitter upon photoexcitation, which has been employed to fabricate four yellow emitting devices with 1931 CIE (x:y) ∼ (0.52:0.48) and a maximum wavelength at 576 nm. These devices display luminous efficacies, external quantum efficiencies, and power efficacies at 600 cd m-2, which lie in the ranges 21.4-31.3 cd A-1, 7.8-11.3%, and 10.2-14.1 lm W1-, respectively, depending on the device configuration.
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Affiliation(s)
- Vadim Adamovich
- Universal
Display Corporation, Ewing, New Jersey 08618, United States
| | - Llorenç Benavent
- Departamento
de Química Inorgánica, Instituto de Síntesis
Química y Catálisis Homogénea (ISQCH), Centro
de Innovación en Química Avanzada (ORFEO-CINQA), Universidad de Zaragoza-CSIC, 50009 Zaragoza, Spain
| | | | - Miguel A. Esteruelas
- Departamento
de Química Inorgánica, Instituto de Síntesis
Química y Catálisis Homogénea (ISQCH), Centro
de Innovación en Química Avanzada (ORFEO-CINQA), Universidad de Zaragoza-CSIC, 50009 Zaragoza, Spain
| | - Ana M. López
- Departamento
de Química Inorgánica, Instituto de Síntesis
Química y Catálisis Homogénea (ISQCH), Centro
de Innovación en Química Avanzada (ORFEO-CINQA), Universidad de Zaragoza-CSIC, 50009 Zaragoza, Spain
| | - Enrique Oñate
- Departamento
de Química Inorgánica, Instituto de Síntesis
Química y Catálisis Homogénea (ISQCH), Centro
de Innovación en Química Avanzada (ORFEO-CINQA), Universidad de Zaragoza-CSIC, 50009 Zaragoza, Spain
| | - Jui-Yi Tsai
- Universal
Display Corporation, Ewing, New Jersey 08618, United States
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5
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Peng TY, Xu ZY, Zhang FL, Li B, Xu WP, Fu Y, Wang YF. Dehydroxylative Alkylation of α-Hydroxy Carboxylic Acid Derivatives via a Spin-Center Shift. Angew Chem Int Ed Engl 2022; 61:e202201329. [PMID: 35388555 DOI: 10.1002/anie.202201329] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2022] [Indexed: 11/05/2022]
Abstract
A strategically distinct dehydroxylative alkylation reaction of α-hydroxy carboxylic acid derivatives with alkenes is developed. The reaction starts with the attack of a 4-dimethylaminopyridine (DMAP)-boryl radical to the carbonyl oxygen atom, followed by a spin-center shift (SCS) to trigger the C-O bond scission. The resulting α-carbonyl radicals couple with a wide range of alkenes to furnish various alkylated products. This strategy allows for the efficient conversion of a wide array of α-hydroxy amides and esters derived from several biomass molecules and natural products to value-added compounds. Experimental and computational studies verified the reaction mechanism.
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Affiliation(s)
- Tian-Yu Peng
- CAS Key Laboratory of Urban Pollutant Conversion, Anhui Province Key Laboratory of Biomass Clean Energy, Department of Chemistry, University of Science and Technology of China, 96 Jinzhai Road, Hefei, Anhui, 230026, China
| | - Zhe-Yuan Xu
- CAS Key Laboratory of Urban Pollutant Conversion, Anhui Province Key Laboratory of Biomass Clean Energy, Department of Chemistry, University of Science and Technology of China, 96 Jinzhai Road, Hefei, Anhui, 230026, China
| | - Feng-Lian Zhang
- CAS Key Laboratory of Urban Pollutant Conversion, Anhui Province Key Laboratory of Biomass Clean Energy, Department of Chemistry, University of Science and Technology of China, 96 Jinzhai Road, Hefei, Anhui, 230026, China
| | - Bin Li
- CAS Key Laboratory of Urban Pollutant Conversion, Anhui Province Key Laboratory of Biomass Clean Energy, Department of Chemistry, University of Science and Technology of China, 96 Jinzhai Road, Hefei, Anhui, 230026, China
| | - Wen-Ping Xu
- CAS Key Laboratory of Urban Pollutant Conversion, Anhui Province Key Laboratory of Biomass Clean Energy, Department of Chemistry, University of Science and Technology of China, 96 Jinzhai Road, Hefei, Anhui, 230026, China
| | - Yao Fu
- CAS Key Laboratory of Urban Pollutant Conversion, Anhui Province Key Laboratory of Biomass Clean Energy, Department of Chemistry, University of Science and Technology of China, 96 Jinzhai Road, Hefei, Anhui, 230026, China
| | - Yi-Feng Wang
- CAS Key Laboratory of Urban Pollutant Conversion, Anhui Province Key Laboratory of Biomass Clean Energy, Department of Chemistry, University of Science and Technology of China, 96 Jinzhai Road, Hefei, Anhui, 230026, China.,State Key Laboratory of Elemento-Organic Chemistry, Nankai University, Tianjin, 300071, China
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6
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Peng TY, Xu ZY, Zhang FL, Li B, Xu WP, Fu Y, Wang YF. Dehydroxylative Alkylation of α‐Hydroxy Carboxylic Acids Derivatives via Spin‐center Shift. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202201329] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Tian-Yu Peng
- University of Science and Technology of China Department of Chemistry CHINA
| | - Zhe-Yuan Xu
- University of Science and Technology of China Department of Chemistry CHINA
| | - Feng-Lian Zhang
- University of Science and Technology of China Department of Chemistry CHINA
| | - Bin Li
- University of Science and Technology of China Department of Chemistry CHINA
| | - Wen-Ping Xu
- University of Science and Technology of China Department of Chemistry CHINA
| | - Yao Fu
- University of Science and Technology of China Department of Chemistry CHINA
| | - Yi-Feng Wang
- University of Science and Technology of China Hefei National Laboratory for Physical Sciences at the Microscale and Department of Chemistry 96 Jinzhai Road 230026 Hefei CHINA
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7
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Kato Y, Inoue T, Furuyama Y, Ohgane K, Sadaie M, Kuramochi K. Deoxygenation of tertiary and secondary alcohols with sodium borohydride, trimethylsilyl chloride, and potassium iodide in acetonitrile. Tetrahedron Lett 2021. [DOI: 10.1016/j.tetlet.2021.153519] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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8
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Zhang J, Yang JD, Cheng JP. Diazaphosphinyl radical-catalyzed deoxygenation of α-carboxy ketones: a new protocol for chemo-selective C-O bond scission via mechanism regulation. Chem Sci 2020; 11:8476-8481. [PMID: 34123107 PMCID: PMC8163385 DOI: 10.1039/d0sc03220d] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2020] [Accepted: 07/27/2020] [Indexed: 11/22/2022] Open
Abstract
C-O bond cleavage is often a key process in defunctionalization of organic compounds as well as in degradation of natural polymers. However, it seldom occurs regioselectively for different types of C-O bonds under metal-free mild conditions. Here we report a facile chemo-selective cleavage of the α-C-O bonds in α-carboxy ketones by commercially available pinacolborane under the catalysis of diazaphosphinane based on a mechanism switch strategy. This new reaction features high efficiency, low cost and good group-tolerance, and is also amenable to catalytic deprotection of desyl-protected carboxylic acids and amino acids. Mechanistic studies indicated an electron-transfer-initiated radical process, underlining two crucial steps: (1) the initiator azodiisobutyronitrile switches originally hydridic reduction to kinetically more accessible electron reduction; and (2) the catalytic phosphorus species upconverts weakly reducing pinacolborane into strongly reducing diazaphosphinane.
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Affiliation(s)
- Jingjing Zhang
- Department of Chemistry, Center of Basic Molecular Science, Tsinghua University Beijing 100084 China
| | - Jin-Dong Yang
- Department of Chemistry, Center of Basic Molecular Science, Tsinghua University Beijing 100084 China
| | - Jin-Pei Cheng
- Department of Chemistry, Center of Basic Molecular Science, Tsinghua University Beijing 100084 China
- State Key Laboratory of Elemento-Organic Chemistry, College of Chemistry, Nankai University Tianjin 300071 China
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9
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Sandeep, Venugopalan P, Kumar A. Metal Free, Direct and Selective Deoxygenation of α-Hydroxy Carbonyl Compounds: Access to α,α-Diaryl Carbonyl Compounds. European J Org Chem 2020. [DOI: 10.1002/ejoc.202000142] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Sandeep
- Department of Applied Sciences; University Institute of Engineering and Technology; Panjab University; 160014 Chandigarh India
- Department of Chemistry; University Institute of Engineering and Technology; Panjab University; 160014 Chandigarh India
| | - Paloth Venugopalan
- Department of Chemistry; University Institute of Engineering and Technology; Panjab University; 160014 Chandigarh India
| | - Anil Kumar
- Department of Applied Sciences; University Institute of Engineering and Technology; Panjab University; 160014 Chandigarh India
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10
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Hu XQ, Hou YX, Liu ZK, Gao Y. Recent advances in phosphoranyl radical-mediated deoxygenative functionalisation. Org Chem Front 2020. [DOI: 10.1039/d0qo00643b] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Alcohols and carboxylic acids have been established as versatile building blocks in the assembly of various carbon frameworks.
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Affiliation(s)
- Xiao-Qiang Hu
- Key Laboratory of Catalysis and Energy Materials Chemistry of Ministry of Education & Hubei Key Laboratory of Catalysis and Materials Science
- School of Chemistry and Materials Science
- South-Central University for Nationalities
- Wuhan 430074
- China
| | - Ye-Xing Hou
- Key Laboratory of Catalysis and Energy Materials Chemistry of Ministry of Education & Hubei Key Laboratory of Catalysis and Materials Science
- School of Chemistry and Materials Science
- South-Central University for Nationalities
- Wuhan 430074
- China
| | - Zi-Kui Liu
- Key Laboratory of Catalysis and Energy Materials Chemistry of Ministry of Education & Hubei Key Laboratory of Catalysis and Materials Science
- School of Chemistry and Materials Science
- South-Central University for Nationalities
- Wuhan 430074
- China
| | - Yang Gao
- School of Chemical Engineering and Light Industry
- Guangdong University of Technology
- Guangzhou
- China
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