1
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Zhang Z, Liu M, Liu M, Pan C, Mao Z, Zhang X. Visible-Light-Induced Highly Site-Selective Direct C-H Phosphorylation of Pyrrolo[2,3- d]pyrimidine Derivatives with H-Phosphine Oxides. J Org Chem 2024; 89:2996-3009. [PMID: 38359468 DOI: 10.1021/acs.joc.3c02416] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/17/2024]
Abstract
An efficient and highly regioselective C6-phosphorylation protocol for pyrrolo[2,3-d]pyrimidine (7-DAP) derivatives with various H-phosphine oxides induced by visible light at room temperature is described for the first time. This protocol has been successfully achieved by the combination of Na2-eosin Y as a photocatalyst and LPO as an oxidant under transition metal- and additive-free conditions. The broad substrate scope, good functional group tolerance, excellent regioselectivity, and air tolerant conditions make this process favorable for the functional modification of pyrrolo[2,3-d]pyrimidine scaffold and enrich the phosphorylated 7-DAP compounds for further biological evaluation.
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Affiliation(s)
- Zhuo Zhang
- College of Pharmaceutical Science, Zhejiang University of Technology, Hangzhou 310014, P. R. China
| | - Mingrui Liu
- College of Pharmaceutical Science, Zhejiang University of Technology, Hangzhou 310014, P. R. China
| | - Min Liu
- College of Pharmaceutical Science, Zhejiang University of Technology, Hangzhou 310014, P. R. China
| | - Chenhong Pan
- College of Pharmaceutical Science, Zhejiang University of Technology, Hangzhou 310014, P. R. China
| | - Zhengtong Mao
- College of Pharmaceutical Science, Zhejiang University of Technology, Hangzhou 310014, P. R. China
| | - Xingxian Zhang
- College of Pharmaceutical Science, Zhejiang University of Technology, Hangzhou 310014, P. R. China
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2
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Xiang S, Li M, Xia Z, Fang C, Yang W, Deng W, Tan Z. Photocatalyst-free visible-light-promoted C(sp 2)-P coupling: efficient synthesis of aryl phosphonates. Org Biomol Chem 2024; 22:1794-1799. [PMID: 38348741 DOI: 10.1039/d3ob01987j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/29/2024]
Abstract
A novel and efficient method for the synthesis of aryl phosphonates from aryl halides and trialkylphosphites via EDA complex-based photochemistry has been developed. It is demonstrated that aryl radicals, generated from the photoexcitation of the EDA complex formed by aryl halide and potassium thioacetate, could be intercepted with trialkylphosphite to produce the corresponding aryl phosphonates in moderate to good yields. It should be noted that the reaction is performed at room temperature in the absence of any transition metal catalyst, oxidant and photocatalyst, exhibiting high efficiency, high selectivity, and operational simplicity.
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Affiliation(s)
- Shiqi Xiang
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, P. R. China.
| | - Min Li
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, P. R. China.
| | - Zhen Xia
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, P. R. China.
| | - Chen Fang
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, P. R. China.
| | - Wen Yang
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, P. R. China.
| | - Wei Deng
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, P. R. China.
| | - Ze Tan
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, P. R. China.
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3
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Huszár B, Szolga R, Bősze S, Oláhné Szabó R, Simon A, Karaghiosoff K, Czugler M, Drahos L, Keglevich G. Synthesis and Anticancer Activity of Phosphinoylated and Phosphonoylated N-Heterocycles Obtained by the Microwave-Assisted Palladium Acetate-Catalyzed Hirao Reaction. Chemistry 2023; 29:e202302465. [PMID: 37711077 DOI: 10.1002/chem.202302465] [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: 07/31/2023] [Revised: 08/28/2023] [Accepted: 09/12/2023] [Indexed: 09/16/2023]
Abstract
A literature survey showed that different derivatives with the 9-phenyl-9H-carbazole or the dihydroindoline scaffold may be of biological activity including cytotoxic effect. Driven by this experience, P-functionalized derivatives of these N-heterocycles were synthesized. Three N-heterocycles, 9-(4-bromophenyl)-9H-carbazole, 3-bromo-9-phenyl-9H-carbazole and 1-(5-bromoindolin-1-yl)ethan-1-one, were coupled with dialkyl phosphites and diarylphosphine oxides using Pd(OAc)2 (10 %) as the catalyst precursor and triethylamine as the base in ethanol under microwave irradiation. The excess of the Y2 P(O)H reagent (Y=alkoxy, aryl) (30 %) served as the P-ligand in its trivalent tautomeric form (Y2 POH), hence there was no need for the usual P-ligands meaning cost and environmental burden. Hence, the presented method is a "green" approach that proved to be more efficient than the preparation by the traditional method. The products, dialkyl phosphonates and tertiary phosphine oxides obtained in 58-84 % yields were characterized, one of them also by single crystal X-ray analysis, and were subjected to in vitro biological activity evaluation. A (carbazol)yl-phenylphosphonate, an N-phenyl-(carbazol)yl-phosphonate, a (carbazol)yl-phenylphosphine oxide and an N-phenyl-(carbazol)ylphosphine oxide revealed a significant cytotoxic activity on A549 human non-small-cell lung carcinoma and MonoMac-6 acute monocytic leukemia cancer cells. The cytotoxic effect was significant as compared to that of the reference compounds.
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Affiliation(s)
- Bianka Huszár
- Department of Organic Chemistry and Technology, Faculty of Chemical Technology and Biotechnology, Budapest University of Technology and Economics, 1521, Budapest, Hungary
| | - Renáta Szolga
- Department of Organic Chemistry and Technology, Faculty of Chemical Technology and Biotechnology, Budapest University of Technology and Economics, 1521, Budapest, Hungary
| | - Szilvia Bősze
- Eötvös Loránd Research Network (ELKH), Research Group of Peptide Chemistry, Eötvös Loránd University, 1117, Budapest, Hungary
| | - Rita Oláhné Szabó
- Eötvös Loránd Research Network (ELKH), Research Group of Peptide Chemistry, Eötvös Loránd University, 1117, Budapest, Hungary
- Department of Genetics, Cell-and Immunobiology, Semmelweis University, 1089, Budapest, Nagyvárad tér 4, Hungary
| | - András Simon
- Department of Inorganic and Analytical Chemistry, Faculty of Chemical Technology and Biotechnology, Budapest University of Technology and Economics, 1521, Budapest, Hungary
| | - Konstantin Karaghiosoff
- Department Chemie, Ludwig-Maximilians-Universitat München, 81377, München, Butenandtstr. 5-13, Germany
| | - Mátyás Czugler
- Department of Organic Chemistry and Technology, Faculty of Chemical Technology and Biotechnology, Budapest University of Technology and Economics, 1521, Budapest, Hungary
| | - László Drahos
- MS Proteomics Research Group, Research Centre for Natural Sciences, 1117, Budapest, Hungary
| | - György Keglevich
- Department of Organic Chemistry and Technology, Faculty of Chemical Technology and Biotechnology, Budapest University of Technology and Economics, 1521, Budapest, Hungary
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4
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Yue HQ, Shi DW, Li M, Gao SQ, Sun MX, Zhang S, Yang SD, Yang B. Tf 2O/DMSO-mediated dual activation of aryl phosphinate to access various aryl phosphonates. Chem Commun (Camb) 2023; 59:10817-10820. [PMID: 37602683 DOI: 10.1039/d3cc03250g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/22/2023]
Abstract
A metal-free method for the dual activation of aryl phosphinate has been developed; the P-H and P-O bonds are sequentially activated by the Tf2O/DMSO system. Without the requirement of metals and unstable P-reagents, this one-pot procedure provides a convenient and practical access to a variety of aryl phosphonates. A mechanism involving twice generation of electrophilic P-species and two SN-processes is proposed on the basis of the control experiments.
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Affiliation(s)
- Hui-Qi Yue
- College of Chemistry and Chemical Engineering, Yantai University, Yantai, 264005, People's Republic of China.
| | - Da-Wei Shi
- College of Chemistry and Chemical Engineering, Yantai University, Yantai, 264005, People's Republic of China.
| | - Ming Li
- College of Chemistry and Chemical Engineering, Yantai University, Yantai, 264005, People's Republic of China.
| | - Si-Qi Gao
- College of Chemistry and Chemical Engineering, Yantai University, Yantai, 264005, People's Republic of China.
| | - Mu-Xin Sun
- College of Chemistry and Chemical Engineering, Yantai University, Yantai, 264005, People's Republic of China.
| | - Shun Zhang
- College of Chemistry and Chemical Engineering, Yantai University, Yantai, 264005, People's Republic of China.
| | - Shang-Dong Yang
- State Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, People's Republic of China
| | - Bin Yang
- College of Chemistry and Chemical Engineering, Yantai University, Yantai, 264005, People's Republic of China.
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5
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Volkova Y, Zavarzin I. Synthesis of Phosphorus(V)-Substituted Six-Membered N-Heterocycles: Recent Progress and Challenges. Molecules 2023; 28:molecules28062472. [PMID: 36985443 PMCID: PMC10054050 DOI: 10.3390/molecules28062472] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2023] [Revised: 03/02/2023] [Accepted: 03/02/2023] [Indexed: 03/11/2023] Open
Abstract
Heterocycles functionalized with pentavalent phosphorus are of great importance since they include a great variety of biologically active compounds and pharmaceuticals, advanced materials, and valuable reactive intermediates for organic synthesis. Significant progress in synthesis of P(O)R2-substituted six-membered heterocycles has been made in the past decade. This review covers the synthetic strategies towards aromatic monocyclic six-membered N-heterocycles, such as pyridines, pyridazines, pyrimidines, and pyrazines bearing phosphonates and phosphine oxides, which were reported from 2012 to 2022.
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6
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Pd-Catalyzed Hirao P–C Coupling Reactions with Dihalogenobenzenes without the Usual P-Ligands under MW Conditions. Catalysts 2022. [DOI: 10.3390/catal12101080] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
A literature survey of the P–C coupling reactions of 1,4-and 1,2-bromo-iodobenzenes with diphenylphosphine oxide or diethyl phosphite under different conditions comprising Pd-, Ni-, or Cu-catalysis revealed that, depending on the experimental details, the yields of the corresponding >P(O)-bromobenzenes were rather diverse and occasionally contradicting. Therefore, the reactivity of a series of 1,4-, 1,3- and 1,2-dibromo- and bromo-iodobenzenes with the above mentioned P-reagents was evaluated under the “P-ligand-free” microwave (MW)-assisted conditions elaborated by us. Starting from dibromobenzenes and iodo-bromoarenes, practical and competent syntheses were developed for phosphonoyl- and phosphinoyl-bromoarenes, and, in a few instances, for arenes with two P-functions. The cheaper dibromobenzenes may be substituted for the bromo-iodo derivatives. In all, 12 products were prepared in yields of 45–82%. They were fully characterized. The method described does not require the use of traditional P-ligands.
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7
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Huszár B, Mucsi Z, Szolga R, Keglevich G. New data on the Hirao reaction; The use of Cu(II) salts as the catalyst precursor under microwave irradiation in the absence of added P-ligands. J Organomet Chem 2022. [DOI: 10.1016/j.jorganchem.2022.122526] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
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8
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McErlain H, Riley LM, Sutherland A. Palladium-Catalyzed C-P Bond-Forming Reactions of Aryl Nonaflates Accelerated by Iodide. J Org Chem 2021; 86:17036-17049. [PMID: 34726917 PMCID: PMC8650017 DOI: 10.1021/acs.joc.1c02172] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2021] [Indexed: 11/28/2022]
Abstract
An iodide-accelerated, palladium-catalyzed C-P bond-forming reaction of aryl nonaflates is described. The protocol was optimized for the synthesis of aryl phosphine oxides and was found to be tolerant of a wide range of aryl nonaflates. The general nature of this transformation was established with coupling to other P(O)H compounds for the synthesis of aryl phosphonates and an aryl phosphinate. The straightforward synthesis of stable, isolable aryl nonaflates, in combination with the rapid C-P bond-forming reaction allows facile preparation of aryl phosphorus target compounds from readily available phenol starting materials. The synthetic utility of this general strategy was demonstrated with the efficient preparation of an organic light-emitting diode (OLED) material and a phosphonophenylalanine mimic.
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Affiliation(s)
- Holly McErlain
- School of Chemistry, The
Joseph Black Building, University of Glasgow, Glasgow G12 8QQ, United Kingdom
| | - Leanne M. Riley
- School of Chemistry, The
Joseph Black Building, University of Glasgow, Glasgow G12 8QQ, United Kingdom
| | - Andrew Sutherland
- School of Chemistry, The
Joseph Black Building, University of Glasgow, Glasgow G12 8QQ, United Kingdom
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9
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Chen Y, Zhang S, Xue Y, Mo L, Zhang Z. Palladium anchored on a covalent organic framework as a heterogeneous catalyst for phosphorylation of aryl bromides. Appl Organomet Chem 2021. [DOI: 10.1002/aoc.6480] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Yu‐Xuan Chen
- Hebei Key Laboratory of Organic Functional Molecules, National Experimental Chemistry Teaching Center, College of Chemistry and Materials Science Hebei Normal University Shijiazhuang China
| | - Shuo Zhang
- Hebei Key Laboratory of Organic Functional Molecules, National Experimental Chemistry Teaching Center, College of Chemistry and Materials Science Hebei Normal University Shijiazhuang China
| | - Yu‐Jie Xue
- Hebei Key Laboratory of Organic Functional Molecules, National Experimental Chemistry Teaching Center, College of Chemistry and Materials Science Hebei Normal University Shijiazhuang China
| | - Li‐Ping Mo
- Hebei Key Laboratory of Organic Functional Molecules, National Experimental Chemistry Teaching Center, College of Chemistry and Materials Science Hebei Normal University Shijiazhuang China
| | - Zhan‐Hui Zhang
- Hebei Key Laboratory of Organic Functional Molecules, National Experimental Chemistry Teaching Center, College of Chemistry and Materials Science Hebei Normal University Shijiazhuang China
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10
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Fang C, Wei B, Ma D. Cu/
Picolinamides‐Catalyzed
Coupling of (Hetero)aryl Halides with Secondary Phosphine Oxides and Phosphite
†. CHINESE J CHEM 2021. [DOI: 10.1002/cjoc.202100354] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Affiliation(s)
- Chao Fang
- Department of Natural Medicine School of Pharmacy Fudan University, 826 Zhangheng Road Shanghai 201203 China
| | - Bangguo Wei
- Department of Natural Medicine School of Pharmacy Fudan University, 826 Zhangheng Road Shanghai 201203 China
| | - Dawei Ma
- State Key Laboratory of Bioorganic & Natural Products Chemistry, Center for Excellence in Molecular Synthesis Shanghai Institute of Organic Chemistry University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Lingling Lu Shanghai 200032 China
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11
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Dou Q, Geng L, Cheng B, Li CJ, Zeng H. Photoinduced transition-metal and external photosensitizer free cross-coupling of aryl triflates with trialkyl phosphites. Chem Commun (Camb) 2021; 57:8429-8432. [PMID: 34346433 DOI: 10.1039/d1cc03496k] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Photoinduced phosphonation of aryl triflates with trialkyl phosphites via a tandem single-electron-transfer, C-O bond cleavage and Arbuzov rearrangement process in the absence of transition-metal and external photosensitizer is reported herein. The protocol features good functional group compatibility and mild reaction conditions, providing various aryl phosphates in good to high yields. Furthermore, this strategy allows the late-stage phosphonation of complex and biologically active compounds.
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Affiliation(s)
- Qian Dou
- Institute of Marine Biomedicine, Shenzhen Polytechnic, Shenzhen 518055, China.
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12
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Woźnicki P, Stankevič M. Copper‐Catalyzed C−P Cross‐Coupling of (Cyclo)alkenyl/Aryl Bromides and Secondary Phosphine Oxides with
in
situ
Halogen Exchange. European J Org Chem 2021. [DOI: 10.1002/ejoc.202100456] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Paweł Woźnicki
- Department of Organic Chemistry, Faculty of Chemistry Maria Curie-Skłodowska University Gliniana st. 33 20-614 Lublin Poland
| | - Marek Stankevič
- Department of Organic Chemistry, Faculty of Chemistry Maria Curie-Skłodowska University Gliniana st. 33 20-614 Lublin Poland
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13
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Doherty S, Knight JG, Tran TST, Alharbi HY, Perry DO. The Synthesis of Biarylmonophosphonates via Palladium-Catalyzed Phosphonation, Iridium-Catalyzed C-H Borylation, Palladium-Catalyzed Suzuki–Miyaura Cross-Coupling. Catal Letters 2021. [DOI: 10.1007/s10562-021-03643-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
Abstract
The iridium-catalyzed C-H borylation of diethyl phenylphosphonate results in nonselective mono and bisborylation to afford a near statistical mixture of 3-, 3,5- and 4-boryl substituted aryl phosphonates whereas 3-substituted aryl phosphonates undergo highly regioselective C-H borylation to afford the corresponding meta-phosphonate substituted arylboronic esters as the sole product; the resulting boronic esters were used as nucleophilic reagents in a subsequent palladium-catalyzed Suzuki–Miyaura cross-coupling to generate a range of biarylmonophosphonates. Gratifyingly, the Suzuki–Miyaura cross-coupling can be conducted without purifying the boronic ester which greatly simplifies the synthetic procedure.
Graphical Abstract
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14
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15
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Keglevich G. Microwaves as "Co-Catalysts" or as Substitute for Catalysts in Organophosphorus Chemistry. Molecules 2021; 26:1196. [PMID: 33672361 PMCID: PMC7926777 DOI: 10.3390/molecules26041196] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2021] [Revised: 02/18/2021] [Accepted: 02/19/2021] [Indexed: 11/16/2022] Open
Abstract
The purpose of this review is to summarize the importance of microwave (MW) irradiation as a kind of catalyst in organophosphorus chemistry. Slow or reluctant reactions, such as the Diels-Alder cycloaddition or an inverse-Wittig type reaction, may be performed efficiently under MW irradiation. The direct esterification of phosphinic and phosphonic acids, which is practically impossible on conventional heating, may be realized under MW conditions. Ionic liquid additives may promote further esterifications. The opposite reaction, the hydrolysis of P-esters, has also relevance among the MW-assisted transformations. A typical case is when the catalysts are substituted by MWs, which is exemplified by the reduction of phosphine oxides, and by the Kabachnik-Fields condensation affording α-aminophosphonic derivatives. Finally, the Hirao P-C coupling reaction may serve as an example, when the catalyst may be simplified under MW conditions. All of the examples discussed fulfill the expectations of green chemistry.
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Affiliation(s)
- György Keglevich
- Department of Organic Chemistry and Technology, Budapest University of Technology and Economics, 1521 Budapest, Hungary
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16
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Zhang G, Wang J, Guan C, Zhao Y, Ding C. Nickel‐ and Palladium‐Catalyzed Cross‐Coupling of Aryl Fluorosulfonates and Phosphites: Synthesis of Aryl Phosphonates. European J Org Chem 2021. [DOI: 10.1002/ejoc.202001485] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Guofu Zhang
- College of Chemical Engineering Zhejiang University of Technology Hangzhou 310014 People's Republic of China
| | - Jing Wang
- College of Chemical Engineering Zhejiang University of Technology Hangzhou 310014 People's Republic of China
| | - Chenfei Guan
- College of Chemical Engineering Zhejiang University of Technology Hangzhou 310014 People's Republic of China
| | - Yiyong Zhao
- Zhejiang Ecological Environment Low Carbon Development Center Hangzhou 310012 P. R. China
| | - Chengrong Ding
- College of Chemical Engineering Zhejiang University of Technology Hangzhou 310014 People's Republic of China
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17
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Focusing on the Catal. of the Pd- and Ni-Catalyzed Hirao Reactions. Molecules 2020; 25:molecules25173897. [PMID: 32859095 PMCID: PMC7503744 DOI: 10.3390/molecules25173897] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2020] [Revised: 08/24/2020] [Accepted: 08/25/2020] [Indexed: 12/17/2022] Open
Abstract
The Hirao reaction involving the phosphinoylation or phosphonation of aryl halides by >P(O)H reagents is a P–C bond forming transformation belonging to the recently very hot topic of cross-couplings. The Pd- or Ni-catalyzed variations take place via the usual cycle including oxidative addition, ligand exchange, and reductive elimination. However, according to the literature, the nature of the transition metal catalysts is not unambiguous. In this feature article, the catalysts described for the Pd(OAc)2-promoted cases are summarized, and it is concluded that the “(HOY2P)2Pd(0)” species (Y = aryl, alkoxy) is the real catalyst. In our model, the excess of the >P(O)H reagent served as the P-ligand. During the less studied Ni(II)-catalyzed instances the “(HOY2P)(−OY2P)Ni(II)Cl−” form was found to enter the catalytic cycle. The newest conclusions involving the exact structure of the catalysts, and the mechanism for their formation explored by us were supported by our earlier experimental data and theoretical calculations.
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18
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Ghosh S, Biswas K, Basu B. Recent Advances in Microwave Promoted C-P Cross-coupling Reactions. CURRENT MICROWAVE CHEMISTRY 2020. [DOI: 10.2174/2213335607666200401144724] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
:
Organophosphorous compounds are of potential importance in diverse fields. They are often
used as intermediates for making functionalized phosphine ligands as well as find vast applications
in the areas of industrial, agricultural and biological chemistry. The microwave-assisted synthesis
of C-P bonds has become increasingly popular because of its various advantages over conventional
heating in the perspectives of green chemistry.
:
This review article has primarily focused on the synthesis of various organophosphorous molecules
via microwave promoted C-P cross-coupling reactions under metal-catalyzed or metal–free conditions
over the last two decades. The synthesis of phosphine ligands on 4,4′-bisquinolone structural framework,
disubstituted phosphinic acid esters, vinyl phosphines, aryl- and vinylphosphonates, sugar and
nucleoside phosphonates, aminobisphosphonates, triphenyl phosphines, water-soluble tertiary phosphine
oxides and many other potentially useful organophosphorous compounds have been illustrated
critically. The Hirao reaction, Michaelis-Arbuzov reaction and Sandmeyer type of reactions are generally
involved in creating C-P bonds. The role of various metal catalysts, solvents, bases, additives
and temperature in different literatures are carefully discussed.
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Affiliation(s)
- Sujit Ghosh
- Department of Chemistry, Raiganj Surendranath Mahavidyalaya, Raiganj 733134, India
| | - Kinkar Biswas
- Department of Chemistry, Raiganj University, Raiganj 733134, India
| | - Basudeb Basu
- Department of Chemistry, Raiganj University, Raiganj 733134, India
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19
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Henyecz R, Huszár B, Grenitzer V, Keglevich G. A Study on the Reactivity of Monosubstituted Benzenes in the MW-Assisted Pd(OAc)2-catalyzed Hirao Reaction with Ph2P(O)H and (EtO)2P(O)H Reagents. CURR ORG CHEM 2020. [DOI: 10.2174/1385272824999200403170827] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
The reactivity order of “iodobenzene > bromobenzene > phenyl trifluoromethanesulfonate”
was established in microwave (MW)-assisted Pd(OAc)2-catalyzed P–C
coupling reactions with diphenylphosphine oxide and diethyl phosphite, where the excess
of the these >P(O)H reagents served as the reducing agent, and, via its tautomeric >P-OH
form, also as the P-ligand. The P–C coupling of Ph2P(O)H with PhBr at 120 °C took place
via an induction period, during which the active “P-Pd-P” catalyst was formed from the
Pd(II) salt and the >P(O)H species. The lower reactivity of PhBr towards Ph2P(O)H could
be promoted by the addition of 20% of KI to the reaction mixture at 120 °C, or utilizing 1
equivalent of KI after a pre-reaction with PhBr at 120-150 °C followed by the P–C coupling
at 100 °C. The reactivity of PhOTf and a bromo analogue was compared in competitive couplings with
Ph2P(O)H. Beyond this, the reactivity of Ph2P(O)H and (EtO)2P(O)H towards PhOTf was evaluated in another
competitive experiment. Increasing the scale of the P–C coupling reaction of (EtO)2P(O)H with PhBr, the
quantity for the components of the catalyst could be decreased.
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Affiliation(s)
- Réka Henyecz
- Department of Organic Chemistry and Technology, Budapest University of Technology and Economics, 1521 Budapest, Hungary
| | - Bianka Huszár
- Department of Organic Chemistry and Technology, Budapest University of Technology and Economics, 1521 Budapest, Hungary
| | - Viktória Grenitzer
- Department of Organic Chemistry and Technology, Budapest University of Technology and Economics, 1521 Budapest, Hungary
| | - György Keglevich
- Department of Organic Chemistry and Technology, Budapest University of Technology and Economics, 1521 Budapest, Hungary
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20
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Abdou MM. Synopsis of recent synthetic methods and biological applications of phosphinic acid derivatives. Tetrahedron 2020. [DOI: 10.1016/j.tet.2020.131251] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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21
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Keglevich G, Henyecz R, Mucsi Z. Experimental and Theoretical Study on the "2,2'-Bipiridyl-Ni-Catalyzed" Hirao Reaction of >P(O)H Reagents and Halobenzenes: A Ni(0) → Ni(II) or a Ni(II) → Ni(IV) Mechanism? J Org Chem 2020; 85:14486-14495. [PMID: 32407093 PMCID: PMC7684577 DOI: 10.1021/acs.joc.0c00804] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
![]()
It was found by us that the P–C
coupling reaction of >P(O)H
reagents with PhX (X = I and Br) in the presence of NiCl2/Zn as the precursors for the assumed Ni(0) complexant together with
2,2′-bipyridine as the ligand took place only with PhI at 50/70
°C. M06-2X/6-31G(d,p)//PCM(MeCN) calculations
for the reaction of Ph2P(O)H and PhX revealed a favorable
energetics only for the loss of iodide following the oxidative addition
of PhI on the Ni(0) atom. However, the assumed transition states with
Ni(II) formed after P-ligand uptake and deprotonation could not undergo
reductive elimination meaning a “dead-end route”. Hence,
it was assumed that the initial complexation of the remaining Ni2+ ions with 2,2′-bipyridine may move the P–C
coupling forward via a Ni(II) → Ni(IV) transition. This route
was also confirmed by calculations, and this mechanism was justified
by preparative experiments carried out using NiCl2/bipyridine
in the absence of Zn. Hence, the generally accepted Ni(0) →
Ni(II) route was refuted by us, confirming the generality of the Ni(II)
→ N(IV) protocol, either in the presence of bipyridine, or
using the excess of the >P(O)H reagent as the P-ligand.
The results of the calculations on the complex forming ability of
Ni(0) and Ni(II) with 2,2′-bipyridine or the P-reagents were in accord with our mechanistic proposition.
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Affiliation(s)
- György Keglevich
- Department of Organic Chemistry and Technology, Budapest University of Technology and Economics, 1521 Budapest, Hungary
| | - Réka Henyecz
- Department of Organic Chemistry and Technology, Budapest University of Technology and Economics, 1521 Budapest, Hungary
| | - Zoltán Mucsi
- Department of Organic Chemistry and Technology, Budapest University of Technology and Economics, 1521 Budapest, Hungary
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22
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Tong WY, Ly TD, Zhao TT, Wu YB, Wang X. Mechanism of C–P bond formation via Pd-catalyzed decarbonylative phosphorylation of amides: insight into the chemistry of the second coordination sphere. Chem Commun (Camb) 2020; 56:113-116. [DOI: 10.1039/c9cc07923h] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
DFT computations establish a detailed reaction mechanism for the first Pd-catalyzed decarbonylative phosphorylation of amides forming C–P bonds, which includes non-covalent interactions as well as proton transfer in the second coordination sphere.
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Affiliation(s)
- Wen-Yan Tong
- The Key Laboratory of Energy Conversion and Storage of Shanxi Province
- Institute of Molecular Science
- Shanxi University
- Taiyuan
- People's Republic of China
| | - Thu D. Ly
- Department of Chemistry
- University of Colorado Denver
- Denver
- USA
| | - Tao-Tao Zhao
- The Key Laboratory of Energy Conversion and Storage of Shanxi Province
- Institute of Molecular Science
- Shanxi University
- Taiyuan
- People's Republic of China
| | - Yan-Bo Wu
- The Key Laboratory of Energy Conversion and Storage of Shanxi Province
- Institute of Molecular Science
- Shanxi University
- Taiyuan
- People's Republic of China
| | - Xiaotai Wang
- Department of Chemistry
- University of Colorado Denver
- Denver
- USA
- Hoffmann Institute of Advanced Materials
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23
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Henyecz R, Mucsi Z, Keglevich G. A surprising mechanism lacking the Ni(0) state during the Ni(II)-catalyzed P–C cross-coupling reaction performed in the absence of a reducing agent – An experimental and a theoretical study. PURE APPL CHEM 2019. [DOI: 10.1515/pac-2019-1004] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
The Hirao reaction, i.e. the P–C coupling between a bromoarene and a >P(O)H reagent performed in most cases in the presence of a Pd(0) complex incorporating a P-ligand may also be carried out applying a Ni(II) catalyst precursor with or without Zn or Mg as the reducing agent. The Ni catalysts may include P- or N-ligands. B3LYP/6-31G(d,p)//PCM(MeCN) quantum chemical calculations suggested that the mechanism of the NiX2 catalyzed (X=Cl or Br) P–C couplings performed in the absence of a reducing agent, and in the excess of the >P(O)H reagent serving as the P-ligand (via its tautomeric >POH form) is completely different from that of the Pd(OAc)2 promoted version, as no reduction of the Ni(II) occurs. In the two variations mentioned, the active catalyst is the dehydrobrominated species derived from primary complex [(HO)Y2P]2Ni(II)Br2, and the [(HO)Y2P]2Pd(0) complex itself, respectively. Both species undergo temporary oxidation (to “Ni(IV)” and “Pd(II)”, respectively) in the catalytic cycle. During the catalysis with “P2Ni(II)X2”, one of the P-ligands serves the >P(O)H function of the ArP(O)H < product. The consequence of this difference is that in the Ni(II)-catalyzed case, somewhat less >P(O)H-species is needed than in the Pd(0)-promoted instance. Applying 10 % of the Pd(OAc)2 or NiX2 precursor, the optimum quantity of the P-reagent is 1.3 equivalent and, in the first approach, 1.1 equivalent, respectively. Preparative experiments justified the new mechanism explored. The ligation of Ni(II) was also investigated by theoretical calculations. It was proved that the bis-complexation is the most favorable energetically as compared to the mono-, tri- and tetra-ligation.
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Affiliation(s)
- Réka Henyecz
- Department of Organic Chemistry and Technology , Budapest University of Technology and Economics , 1521 Budapest , Hungary
| | - Zoltán Mucsi
- Department of Organic Chemistry and Technology , Budapest University of Technology and Economics , 1521 Budapest , Hungary
| | - György Keglevich
- Department of Organic Chemistry and Technology , Budapest University of Technology and Economics , 1521 Budapest , Hungary
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24
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Hore S, Srivastava A, Singh RP. Cu-Catalyzed Direct C–P Bond Formation through Dehydrogenative Cross-Coupling Reactions between Azoles and Dialkyl Phosphites. J Org Chem 2019; 84:6868-6878. [DOI: 10.1021/acs.joc.9b00670] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Affiliation(s)
- Soumyadip Hore
- Department of Chemistry, Indian Institute of Technology Delhi, Hauz Khas, New Delhi 110016, India
| | - Abhijeet Srivastava
- Department of Chemistry, Indian Institute of Technology Delhi, Hauz Khas, New Delhi 110016, India
| | - Ravi P. Singh
- Department of Chemistry, Indian Institute of Technology Delhi, Hauz Khas, New Delhi 110016, India
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25
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Dong J, Liu L, Ji X, Shang Q, Liu L, Su L, Chen B, Kan R, Zhou Y, Yin SF, Han LB. General Oxidative Aryl C–P Bond Formation through Palladium-Catalyzed Decarbonylative Coupling of Aroylhydrazides with P(O)H Compounds. Org Lett 2019; 21:3198-3203. [DOI: 10.1021/acs.orglett.9b00922] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Jianyu Dong
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, China
- Department of Educational Science, Hunan First Normal University, Changsha 410205, China
| | - Long Liu
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, China
| | - Xuyu Ji
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, China
| | - Qian Shang
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, China
| | - Lixin Liu
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, China
| | - Lebin Su
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, China
| | - Bing Chen
- Key Lab of Environmental Optics & Technology, Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei 230031, China
| | - Ruifeng Kan
- Key Lab of Environmental Optics & Technology, Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei 230031, China
| | - Yongbo Zhou
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, China
| | - Shuang-Feng Yin
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, China
| | - Li-Biao Han
- National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, Ibaraki 305-8565, Japan
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26
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Zeng H, Dou Q, Li CJ. Photoinduced Transition-Metal-Free Cross-Coupling of Aryl Halides with H-Phosphonates. Org Lett 2019; 21:1301-1305. [PMID: 30735397 DOI: 10.1021/acs.orglett.8b04081] [Citation(s) in RCA: 60] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Photoinduced transition-metal- and photosensitizer-free cross-coupling of aryl halides (including Ar-Cl, Ar-Br, and Ar-I) with H-phosphonates (including dialkyl phosphonates and diarylphosphine oxides) is reported. Various functional groups were tolerated, including ester, methoxy, dimethoxy, alkyl, phenyl, trifluoromethyl, and heterocyclic compounds. This simple and green strategy provides a practical pathway to synthesize arylphosphine oxides.
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Affiliation(s)
- Huiying Zeng
- The State Key Laboratory of Applied Organic Chemistry , Lanzhou University , 222 Tianshui Road , Lanzhou 730000 , People's Republic of China
| | - Qian Dou
- The State Key Laboratory of Applied Organic Chemistry , Lanzhou University , 222 Tianshui Road , Lanzhou 730000 , People's Republic of China
| | - Chao-Jun Li
- The State Key Laboratory of Applied Organic Chemistry , Lanzhou University , 222 Tianshui Road , Lanzhou 730000 , People's Republic of China.,Department of Chemistry and FQRNT Centre for Green Chemistry and Catalysis , McGill University , 801 Sherbrooke Street West , Montreal , Quebec H3A 0B8 , Canada
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27
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Yu Y, Yue Z, Ding LG, Zhou Y, Cao H. Mn(OAc)3
-Mediated Regioselective C-H Phosphonylation of Indolizines with H
-Phosphonates. ChemistrySelect 2019. [DOI: 10.1002/slct.201804056] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Affiliation(s)
- Yue Yu
- School of Chemistry and Chemical Engineering; Guangdong Pharmaceutical University; Zhongshan 528458 P. R. China
| | - Zhongbao Yue
- Zhongbao Yue; Liu-gang Ding and Yong Zhou; Research and Development Centre, Infinitus (China) Company Ltd.; Guangzhou 510665 P. R. China
| | - Liu-gang Ding
- Zhongbao Yue; Liu-gang Ding and Yong Zhou; Research and Development Centre, Infinitus (China) Company Ltd.; Guangzhou 510665 P. R. China
| | - Yong Zhou
- Zhongbao Yue; Liu-gang Ding and Yong Zhou; Research and Development Centre, Infinitus (China) Company Ltd.; Guangzhou 510665 P. R. China
| | - Hua Cao
- School of Chemistry and Chemical Engineering; Guangdong Pharmaceutical University; Zhongshan 528458 P. R. China
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28
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Ghasemzadeh MS, Akhlaghinia B. C–P bond construction catalyzed by NiII immobilized on aminated Fe3O4@TiO2 yolk–shell NPs functionalized by (3-glycidyloxypropyl)trimethoxysilane (Fe3O4@TiO2 YS-GLYMO-UNNiII) in green media. NEW J CHEM 2019. [DOI: 10.1039/c9nj00352e] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
An efficient, versatile and novel method for the C–P cross-coupling reaction with a high yield of products using Fe3O4@TiO2YS-GLYMO-UNNiII as a magnetic nanostructured catalyst in the presence of WERSA was reported.
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Affiliation(s)
- Maryam Sadat Ghasemzadeh
- Department of Chemistry, Faculty of Science, Ferdowsi University of Mashhad
- Mashhad 9177948974
- Iran
| | - Batool Akhlaghinia
- Department of Chemistry, Faculty of Science, Ferdowsi University of Mashhad
- Mashhad 9177948974
- Iran
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29
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Berger O, Winters KR, Sabourin A, Dzyuba SV, Montchamp JL. On the cost of academic methodologies. Org Chem Front 2019. [DOI: 10.1039/c9qo00200f] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
Synthetic methodologies can be easily compared using the Cost of Academic Methodologies (CAM) parameter, which estimates the cost of making a mole of a product.
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Affiliation(s)
- Olivier Berger
- Department of Chemistry and Biochemistry
- Texas Christian University
- Fort Worth
- USA
| | - Karen R. Winters
- Department of Chemistry and Biochemistry
- Texas Christian University
- Fort Worth
- USA
| | - Axel Sabourin
- Department of Chemistry and Biochemistry
- Texas Christian University
- Fort Worth
- USA
| | - Sergei V. Dzyuba
- Department of Chemistry and Biochemistry
- Texas Christian University
- Fort Worth
- USA
| | - Jean-Luc Montchamp
- Department of Chemistry and Biochemistry
- Texas Christian University
- Fort Worth
- USA
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30
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Feng S, Li J, He F, Li T, Li H, Wang X, Xie X, She X. A copper-catalyzed radical coupling/fragmentation reaction: efficient access to β-oxophosphine oxides. Org Chem Front 2019. [DOI: 10.1039/c9qo00006b] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The development of a novel copper-catalyzed three-component radical coupling/fragmentation cascade reaction to generate diverse β-oxophosphine oxides is reported.
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Affiliation(s)
- Shangbiao Feng
- State Key Laboratory of Applied Organic Chemistry
- Department of Chemistry
- Lanzhou University
- Lanzhou
- China
| | - Jinlai Li
- State Key Laboratory of Applied Organic Chemistry
- Department of Chemistry
- Lanzhou University
- Lanzhou
- China
| | - Feifei He
- State Key Laboratory of Applied Organic Chemistry
- Department of Chemistry
- Lanzhou University
- Lanzhou
- China
| | - Tao Li
- State Key Laboratory of Applied Organic Chemistry
- Department of Chemistry
- Lanzhou University
- Lanzhou
- China
| | - Huilin Li
- State Key Laboratory of Applied Organic Chemistry
- Department of Chemistry
- Lanzhou University
- Lanzhou
- China
| | - Xiaolei Wang
- State Key Laboratory of Applied Organic Chemistry
- Department of Chemistry
- Lanzhou University
- Lanzhou
- China
| | - Xingang Xie
- State Key Laboratory of Applied Organic Chemistry
- Department of Chemistry
- Lanzhou University
- Lanzhou
- China
| | - Xuegong She
- State Key Laboratory of Applied Organic Chemistry
- Department of Chemistry
- Lanzhou University
- Lanzhou
- China
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31
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Henyecz R, Keglevich G. New Developments on the Hirao Reactions, Especially from "Green" Point of View. Curr Org Synth 2019; 16:523-545. [PMID: 31984929 PMCID: PMC7432197 DOI: 10.2174/1570179416666190415110834] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2019] [Revised: 02/19/2019] [Accepted: 03/12/2019] [Indexed: 01/08/2023]
Abstract
BACKGROUND The Hirao reaction discovered ca. 35 years ago is an important P-C coupling protocol between dialkyl phosphites and aryl halides in the presence of Pd(PPh3)4 as the catalyst and a base to provide aryl phosphonates. Then, the reaction was extended to other Preagents, such as secondary phosphine oxides and H-phosphinates and to other aryl and hetaryl derivatives to afford also phosphinic esters and tertiary phosphine oxides. Instead of the Pd(PPh3)4 catalyst, Pd(OAc)2 and Ni-salts were also applied as catalyst precursors together with a number of mono- and bidentate P-ligands. OBJECTIVE In our review, we undertook to summarize the target reaction with a special stress on the developments attained in the last 6 years, hence this paper is an update of our earlier reviews in a similar topic. CONCLUSIONS "Greener" syntheses aimed at utilizing phase transfer catalytic and microwave-assisted approaches, even under "P-ligand-free. or even solvent-free conditions are the up-to date versions of the classical Hirao reaction. The mechanism of the reaction is also in the focus these days.
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Affiliation(s)
- Réka Henyecz
- Department of Organic Chemistry and Technology, Budapest University of Technology and Economics, 1521Budapest, Hungary
| | - György Keglevich
- Department of Organic Chemistry and Technology, Budapest University of Technology and Economics, 1521Budapest, Hungary
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32
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Henyecz R, Mucsi Z, Keglevich G. Palladium-catalyzed microwave-assisted Hirao reaction utilizing the excess of the diarylphosphine oxide reagent as the P-ligand; a study on the activity and formation of the “PdP2” catalyst. PURE APPL CHEM 2018. [DOI: 10.1515/pac-2018-1004] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
The microwave-assisted Hirao reaction of bromobenzene and diarylphosphine oxides was performed at 120 °C using triethylamine as the base, and 5% of palladium acetate as the catalyst in ethanol. 5% Excess of the >P(O)H reagent served as the reducing agent, while another 10% as the preligand (in the >POH tautomeric form). It was found that the P–C coupling reaction was significantly faster with (2-MeC6H4)2P(O)H (A) and (3,5-diMeC6H3)2P(O)H (B), than with Ph2P(O)H (C) and (4-MeC6H4)2P(O)H (D). Moreover, species A and B could be applied as selective P-ligands in the reaction of bromobenzene with C or D. Dependence of the effectiveness of “PdP2” catalysts with diarylphosphine oxide preligands on the methyl substituents followed a reversed order as the reactivity of the diarylphosphine oxide species in the P–C coupling itself. Formation of the “PdP2” catalyst from palladium acetate and diarylphosphine oxide has never been studied, but now it was evaluated by us at the B3LYP level of theory applying 6-31G(d,p) for C,H,P,O and SDD/MW28 for Pd including the explicit-implicit solvent model. The novel mechanism requiring three equivalents of the >P(O)H species for each of the palladium acetate molecule was in agreement with the preparative experiments. The ligation of palladium(0) with different P(III) species comprising the >POH form of the >P(O)H reagent was also studied, and the critical role of the steric hindrance on the ligation, and hence on the activity of the “PdP2” catalyst was substantiated. Last but not least, the influence of the Me substituents in the aromatic ring of the P-reagents on the energetics of the elemental steps of the Hirao reaction itself was also evaluated.
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Affiliation(s)
- Réka Henyecz
- Department of Organic Chemistry and Technology , Budapest University of Technology and Economics , Budapest 1521 , Hungary
| | - Zoltán Mucsi
- Department of Organic Chemistry and Technology , Budapest University of Technology and Economics , Budapest 1521 , Hungary
| | - György Keglevich
- Department of Organic Chemistry and Technology , Budapest University of Technology and Economics , Budapest 1521 , Hungary
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33
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Liu Y, Liu Z, Zhang Y, Xiong C. Manganese(III) Acetylacetonate-Mediated Phosphorylation of Enamides at Room Temperature. Adv Synth Catal 2018. [DOI: 10.1002/adsc.201800585] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Affiliation(s)
- Yue Liu
- Department of Chemistry; Zhejiang University; Hangzhou 310027 People's Republic of China
| | - Zhanxiang Liu
- Department of Chemistry; Zhejiang University; Hangzhou 310027 People's Republic of China
| | - Yuhong Zhang
- Department of Chemistry; Zhejiang University; Hangzhou 310027 People's Republic of China
- State Key Laboratory of Applied Organic Chemistry; Lanzhou University; Lanzhou 730000 People's Republic of China
| | - Chunhua Xiong
- Department of Applied Chemistry; Zhejiang Gongshang University; Hangzhou 310012 People's Republic of China
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34
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Lecroq W, Bazille P, Morlet-Savary F, Breugst M, Lalevée J, Gaumont AC, Lakhdar S. Visible-Light-Mediated Metal-Free Synthesis of Aryl Phosphonates: Synthetic and Mechanistic Investigations. Org Lett 2018; 20:4164-4167. [DOI: 10.1021/acs.orglett.8b01379] [Citation(s) in RCA: 46] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Affiliation(s)
- William Lecroq
- Normandie Univ., LCMT, ENSICAEN, UNICAEN, CNRS, 6, Boulevard Maréchal Juin, Caen 14000 France
| | - Pierre Bazille
- Normandie Univ., LCMT, ENSICAEN, UNICAEN, CNRS, 6, Boulevard Maréchal Juin, Caen 14000 France
| | - Fabrice Morlet-Savary
- Institut de Science des Matériaux de Mulhouse IS2M-UMR CNRS 7361-UHA, 15, rue Jean Starcky, Mulhouse Cedex 68057, France
| | - Martin Breugst
- Department für Chemie, Universität zu Köln, Greinstraße 4, 50939 Köln, Germany
| | - Jacques Lalevée
- Institut de Science des Matériaux de Mulhouse IS2M-UMR CNRS 7361-UHA, 15, rue Jean Starcky, Mulhouse Cedex 68057, France
| | - Annie-Claude Gaumont
- Normandie Univ., LCMT, ENSICAEN, UNICAEN, CNRS, 6, Boulevard Maréchal Juin, Caen 14000 France
| | - Sami Lakhdar
- Normandie Univ., LCMT, ENSICAEN, UNICAEN, CNRS, 6, Boulevard Maréchal Juin, Caen 14000 France
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35
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Xu Z, Wang P, Chen Q, Cai M. A practical synthesis of unsymmetrical triarylphosphines by heterogeneous palladium(0)-catalyzed cross-coupling of aryl iodides with diphenylphosphine. J Organomet Chem 2018. [DOI: 10.1016/j.jorganchem.2018.04.018] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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36
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Marzo L, Pagire SK, Reiser O, König B. Photokatalyse mit sichtbarem Licht: Welche Bedeutung hat sie für die organische Synthese? Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201709766] [Citation(s) in RCA: 306] [Impact Index Per Article: 51.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Leyre Marzo
- Institut für Organische Chemie; Universität Regensburg; Universitätsstraße 31 93053 Regensburg Deutschland
| | - Santosh K. Pagire
- Institut für Organische Chemie; Universität Regensburg; Universitätsstraße 31 93053 Regensburg Deutschland
| | - Oliver Reiser
- Institut für Organische Chemie; Universität Regensburg; Universitätsstraße 31 93053 Regensburg Deutschland
| | - Burkhard König
- Institut für Organische Chemie; Universität Regensburg; Universitätsstraße 31 93053 Regensburg Deutschland
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37
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Marzo L, Pagire SK, Reiser O, König B. Visible-Light Photocatalysis: Does It Make a Difference in Organic Synthesis? Angew Chem Int Ed Engl 2018; 57:10034-10072. [PMID: 29457971 DOI: 10.1002/anie.201709766] [Citation(s) in RCA: 1132] [Impact Index Per Article: 188.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2017] [Revised: 01/12/2018] [Indexed: 12/12/2022]
Abstract
Visible-light photocatalysis has evolved over the last decade into a widely used method in organic synthesis. Photocatalytic variants have been reported for many important transformations, such as cross-coupling reactions, α-amino functionalizations, cycloadditions, ATRA reactions, or fluorinations. To help chemists select photocatalytic methods for their synthesis, we compare in this Review classical and photocatalytic procedures for selected classes of reactions and highlight their advantages and limitations. In many cases, the photocatalytic reactions proceed under milder reaction conditions, typically at room temperature, and stoichiometric reagents are replaced by simple oxidants or reductants, such as air, oxygen, or amines. Does visible-light photocatalysis make a difference in organic synthesis? The prospect of shuttling electrons back and forth to substrates and intermediates or to selectively transfer energy through a visible-light-absorbing photocatalyst holds the promise to improve current procedures in radical chemistry and to open up new avenues by accessing reactive species hitherto unknown, especially by merging photocatalysis with organo- or metal catalysis.
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Affiliation(s)
- Leyre Marzo
- Institut für Organische Chemie, Universität Regensburg, Universitätsstrasse 31, 93053, Regensburg, Germany
| | - Santosh K Pagire
- Institut für Organische Chemie, Universität Regensburg, Universitätsstrasse 31, 93053, Regensburg, Germany
| | - Oliver Reiser
- Institut für Organische Chemie, Universität Regensburg, Universitätsstrasse 31, 93053, Regensburg, Germany
| | - Burkhard König
- Institut für Organische Chemie, Universität Regensburg, Universitätsstrasse 31, 93053, Regensburg, Germany
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Fang Z, Cai M, Lin Y, Zhao H. An efficient heterogeneous cross-coupling of aryl iodides with diphenylphosphine catalyzed by copper (I) immobilized in MCM-41. Appl Organomet Chem 2018. [DOI: 10.1002/aoc.4417] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Zhiqiang Fang
- School of Chemistry and Chemical Engineering, Guangdong Cosmetics Engineering and Technology Research Center; Guangdong Pharmaceutical University; Guangzhou 510006 People's Republic of China
| | - Mingzhong Cai
- College of Chemistry and Chemical Engineering; Jiangxi Normal University; Nanchang 330022 People's Republic of China
| | - Yang Lin
- School of Chemistry and Chemical Engineering, Guangdong Cosmetics Engineering and Technology Research Center; Guangdong Pharmaceutical University; Guangzhou 510006 People's Republic of China
| | - Hong Zhao
- School of Chemistry and Chemical Engineering, Guangdong Cosmetics Engineering and Technology Research Center; Guangdong Pharmaceutical University; Guangzhou 510006 People's Republic of China
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39
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Granger E, Solomianko K, Young C, Erb J. Exploration of chiral Lewis acid Mg 2+ catalysts in the synthesis of aryl organophosphate triesters from phosphorus oxychloride through a three-step, two-pot substitution sequence. Tetrahedron Lett 2018. [DOI: 10.1016/j.tetlet.2018.02.066] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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40
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Chen T, Zhao CQ, Han LB. Hydrophosphorylation of Alkynes Catalyzed by Palladium: Generality and Mechanism. J Am Chem Soc 2018; 140:3139-3155. [DOI: 10.1021/jacs.8b00550] [Citation(s) in RCA: 85] [Impact Index Per Article: 14.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Affiliation(s)
- Tieqiao Chen
- College
of Material and Chemical Engineering, Hainan University, Haikou, Hainan 570228, China
- National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, Ibaraki 305-8565, Japan
| | - Chang-Qiu Zhao
- College
of Chemistry and Chemical Engineering, Liaocheng University, Liaocheng, Shandong 252059, China
- National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, Ibaraki 305-8565, Japan
| | - Li-Biao Han
- National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, Ibaraki 305-8565, Japan
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41
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Łastawiecka E, Flis A, Stankevič M, Greluk M, Słowik G, Gac W. P-Arylation of secondary phosphine oxides catalyzed by nickel-supported nanoparticles. Org Chem Front 2018. [DOI: 10.1039/c8qo00356d] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Nickel-supported nanoparticles were used as catalysts for ligand-free Hirao coupling between secondary phosphine oxides and aryl halides.
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Affiliation(s)
- Elżbieta Łastawiecka
- Department of Organic Chemistry
- Faculty of Chemistry
- Maria Curie-Sklodowska University
- Lublin 20-614
- Poland
| | - Anna Flis
- Department of Organic Chemistry
- Faculty of Chemistry
- Maria Curie-Sklodowska University
- Lublin 20-614
- Poland
| | - Marek Stankevič
- Department of Organic Chemistry
- Faculty of Chemistry
- Maria Curie-Sklodowska University
- Lublin 20-614
- Poland
| | - Magdalena Greluk
- Department of Chemical Technology
- Faculty of Chemistry
- Maria Curie-Skłodowska University
- 20-031 Lublin
- Poland
| | - Grzegorz Słowik
- Department of Chemical Technology
- Faculty of Chemistry
- Maria Curie-Skłodowska University
- 20-031 Lublin
- Poland
| | - Wojciech Gac
- Department of Chemical Technology
- Faculty of Chemistry
- Maria Curie-Skłodowska University
- 20-031 Lublin
- Poland
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42
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Yang J, Wu H, Wang Z. Rhodium-catalyzed triarylphosphine synthesis via cross-coupling of aryl iodides and acylphosphines. JOURNAL OF SAUDI CHEMICAL SOCIETY 2018. [DOI: 10.1016/j.jscs.2016.07.002] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
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43
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Sengmany S, Ollivier A, Le Gall E, Léonel E. A mild electroassisted synthesis of (hetero)arylphosphonates. Org Biomol Chem 2018; 16:4495-4500. [DOI: 10.1039/c8ob00500a] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
The first example of a nickel-catalyzed electrochemical coupling between dimethyl phosphite and (hetero)aryl halides to furnish (hetero)arylphosphonates is described.
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Affiliation(s)
- Stéphane Sengmany
- Électrochimie et Synthèse Organique
- Université Paris Est
- ICMPE (UMR 7182)
- CNRS
- UPEC
| | - Anthony Ollivier
- Électrochimie et Synthèse Organique
- Université Paris Est
- ICMPE (UMR 7182)
- CNRS
- UPEC
| | - Erwan Le Gall
- Électrochimie et Synthèse Organique
- Université Paris Est
- ICMPE (UMR 7182)
- CNRS
- UPEC
| | - Eric Léonel
- Électrochimie et Synthèse Organique
- Université Paris Est
- ICMPE (UMR 7182)
- CNRS
- UPEC
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44
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Keglevich G, Henyecz R, Mucsi Z, Kiss NZ. The Palladium Acetate-Catalyzed Microwave-Assisted Hirao Reaction without an Added Phosphorus Ligand as a "Green" Protocol: A Quantum Chemical Study on the Mechanism. Adv Synth Catal 2017; 359:4322-4331. [PMID: 29399016 PMCID: PMC5767766 DOI: 10.1002/adsc.201700895] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2017] [Revised: 10/03/2017] [Indexed: 12/21/2022]
Abstract
It was proved by our experiments that on microwave irradiation, the mono‐ or bidentate phosphorus ligands generally applied in the palladium(II)‐catalyzed P–C coupling reaction of aryl bromides and dialkyl phosphites or secondary phosphine oxides may be substituted by the excess of the >P(O)H reagent that exists under a tautomeric equilibrium. Taking into account that the reduction of the palladium(II) salt and the ligation of the palladium(0) so formed requires 3 equivalents of the P‐species for the catalyst applied in a quantity of 5–10%, all together, 15–30% of the P‐reagent is necessary beyond its stoichiometric quantity. In the coupling reaction of diphenylphosphine oxide, it was possible to apply diethyl phosphite as the reducing agent and as the P‐ligand. The reactivities of the diethyl phosphite and diphenylphosphine oxide reagents were compared in a competitive reaction. The mechanism and the energetics of this new variation of the Hirao reaction of bromobenzene with Y2P(O)H reagents (Y=EtO and Ph) was explored by quantum chemical calculations. The first detailed study on simple reaction models justified our assumption that, under the conditions of the reaction, the trivalent form of the >P(O)H reagent may serve as the P‐ligand in the palladium(0) catalyst, and shed light on the fine mechanism of the reaction sequence. The existence of the earlier described bis(palladium complex) {[H(OPh2P)2PdOAc]2} was refuted by high level theoretical calculations. This kind of complex may be formed only with chloride anions instead of the acetate anion. The interaction of palladium acetate and Y2P(O)H may result in only the formation of the [(HO)Y2P]2Pd complex that is the active catalyst in the Hirao reaction. The new variation of the Hirao reaction is of a more general value, and represents the greenest protocol, as there is no need for the usual P‐ligands. Instead, the >P(O)H reagent should be used in an excess of up to 30%. Hence, the costs and environmental burdens may be decreased. ![]()
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Affiliation(s)
- György Keglevich
- Department of Organic Chemistry and Technology Budapest University of Technology and Economics 1521 Budapest Hungary
| | - Réka Henyecz
- Department of Organic Chemistry and Technology Budapest University of Technology and Economics 1521 Budapest Hungary
| | - Zoltán Mucsi
- Department of Organic Chemistry and Technology Budapest University of Technology and Economics 1521 Budapest Hungary
| | - Nóra Zs Kiss
- Department of Organic Chemistry and Technology Budapest University of Technology and Economics 1521 Budapest Hungary
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45
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Abstract
In this paper, palladium–DABCO complex supported on magnetic nanoparticles was successfully used as a new magnetically recoverable heterogeneous catalyst for the synthesis of arylphosphonates via P-arylation of different types of aryl halides (aryl iodides/bromides/chlorides and benzene boronic acid/sulfonate), with phosphite esters (triethyl/triphenyl/tri-iso-propyl/diethyl/diphenyl/di-iso-propyl phosphite) in neat water without using any additive. The heterogeneous catalyst was easily isolated from the reaction mixture by an external magnet and reused five times without significant degradation in its activity.
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Affiliation(s)
- Sara Sobhani
- Department of Chemistry, College of Sciences, University of Birjand, Birjand, Iran
- Department of Chemistry, College of Sciences, University of Birjand, Birjand, Iran
| | - Zahra Vahidi
- Department of Chemistry, College of Sciences, University of Birjand, Birjand, Iran
- Department of Chemistry, College of Sciences, University of Birjand, Birjand, Iran
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46
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Guo HM, Zhou QQ, Jiang X, Shi DQ, Xiao WJ. Catalyst- and Oxidant-Free Desulfonative C−P Couplings for the Synthesis of Phosphine Oxides and Phosphonates. Adv Synth Catal 2017. [DOI: 10.1002/adsc.201700886] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Hong-Mei Guo
- Hubei International Scientific and Technological Cooperation Base of Pesticide and Green Synthesis, Key Laboratory of Pesticides & Chemical Biology, Ministry of Education, College of Chemistry; Central China Normal University; 152 Luoyu Road Wuhan, Hubei 430079 People's Republic of China
| | - Quan-Quan Zhou
- Hubei International Scientific and Technological Cooperation Base of Pesticide and Green Synthesis, Key Laboratory of Pesticides & Chemical Biology, Ministry of Education, College of Chemistry; Central China Normal University; 152 Luoyu Road Wuhan, Hubei 430079 People's Republic of China
| | - Xuan Jiang
- Hubei International Scientific and Technological Cooperation Base of Pesticide and Green Synthesis, Key Laboratory of Pesticides & Chemical Biology, Ministry of Education, College of Chemistry; Central China Normal University; 152 Luoyu Road Wuhan, Hubei 430079 People's Republic of China
| | - De-Qing Shi
- Hubei International Scientific and Technological Cooperation Base of Pesticide and Green Synthesis, Key Laboratory of Pesticides & Chemical Biology, Ministry of Education, College of Chemistry; Central China Normal University; 152 Luoyu Road Wuhan, Hubei 430079 People's Republic of China
| | - Wen-Jing Xiao
- Hubei International Scientific and Technological Cooperation Base of Pesticide and Green Synthesis, Key Laboratory of Pesticides & Chemical Biology, Ministry of Education, College of Chemistry; Central China Normal University; 152 Luoyu Road Wuhan, Hubei 430079 People's Republic of China
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47
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Liu C, Szostak M. Decarbonylative Phosphorylation of Amides by Palladium and Nickel Catalysis: The Hirao Cross‐Coupling of Amide Derivatives. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201707102] [Citation(s) in RCA: 36] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Chengwei Liu
- Department of Chemistry Rutgers University 73 Warren Street Newark NJ 07102 USA
| | - Michal Szostak
- Department of Chemistry Rutgers University 73 Warren Street Newark NJ 07102 USA
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48
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Liu C, Szostak M. Decarbonylative Phosphorylation of Amides by Palladium and Nickel Catalysis: The Hirao Cross‐Coupling of Amide Derivatives. Angew Chem Int Ed Engl 2017; 56:12718-12722. [DOI: 10.1002/anie.201707102] [Citation(s) in RCA: 136] [Impact Index Per Article: 19.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2017] [Indexed: 01/24/2023]
Affiliation(s)
- Chengwei Liu
- Department of Chemistry Rutgers University 73 Warren Street Newark NJ 07102 USA
| | - Michal Szostak
- Department of Chemistry Rutgers University 73 Warren Street Newark NJ 07102 USA
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49
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Berger O, Montchamp J. Manganese‐Mediated Homolytic Aromatic Substitution with Phosphinylidenes. CHEM REC 2017; 17:1203-1212. [DOI: 10.1002/tcr.201700021] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2017] [Indexed: 01/05/2023]
Affiliation(s)
- Olivier Berger
- Department of Chemistry and Biochemistry Texas Christian University, TCU Box 298860 Fort Worth, Texas 76133 USA
| | - Jean‐Luc Montchamp
- Department of Chemistry and Biochemistry Texas Christian University, TCU Box 298860 Fort Worth, Texas 76133 USA
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50
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Shaikh RS, Ghosh I, König B. Direct C-H Phosphonylation of Electron-Rich Arenes and Heteroarenes by Visible-Light Photoredox Catalysis. Chemistry 2017; 23:12120-12124. [PMID: 28345143 DOI: 10.1002/chem.201701283] [Citation(s) in RCA: 57] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2017] [Indexed: 11/09/2022]
Abstract
The direct transformation of ubiquitous, but chemically inert C-H bonds into diverse functional groups is an important strategy in organic synthesis that improves the atom economy and faclitates the preparation and modification of complex molecules. In contrast to the wide applications of aryl phosphonates, their synthesis via direct C-H bond phosphonylation is a less explored area. We report here a general, mild, and broadly applicable visible-light photoredox C-H bond phosphonylation method for electron-rich arenes and heteroarenes. The photoredox catalytic protocol utilizes electron-rich arenes and biologically important heteroarenes as substrates, [Ru(bpz)3 ][PF6 ]2 as photocatalyst, ammonium persulfate as oxidant, and trialkyl phosphites as the phosphorus source to provide a wide range of aryl phosphonates at ambient temperature under very mild reaction conditions.
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Affiliation(s)
- Rizwan S Shaikh
- Universität Regensburg, Fakultät für Chemie und Pharmazie, 93040, Regensburg, Germany
| | - Indrajit Ghosh
- Universität Regensburg, Fakultät für Chemie und Pharmazie, 93040, Regensburg, Germany
| | - Burkhard König
- Universität Regensburg, Fakultät für Chemie und Pharmazie, 93040, Regensburg, Germany
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