1
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Shinde RD, Paraskar AR, Kumar J, Ghosh E, Paine TK, Bhadra S. Cobalt Catalyzed α-Hydroxylation of Arylacetic Acid Equivalents with Dioxygen. J Org Chem 2024; 89:9666-9671. [PMID: 38877990 DOI: 10.1021/acs.joc.4c00708] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/06/2024]
Abstract
A cobalt catalyst, under oxidative conditions, facilitates the single electron transfer process in N-pyridyl arylacetamides to form α-carbon-centered radicals that readily react with molecular oxygen, giving access to mandelic acid derivatives. In contrast to the known benzylic hydroxylation approaches, this approach enables chemo- and regioselective hydroxylation at a benzylic position adjacent to (N-pyridyl)amides. Mild conditions, broad scope, excellent selectivity, and wide synthetic practicality set up the merit of the reaction.
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Affiliation(s)
- Rupali Dasharath Shinde
- Inorganic Materials and Catalysis Division, CSIR-Central Salt and Marine Chemicals Research Institute, G.B. Marg, Bhavnagar, Gujarat 364002, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Anil Rajendra Paraskar
- Inorganic Materials and Catalysis Division, CSIR-Central Salt and Marine Chemicals Research Institute, G.B. Marg, Bhavnagar, Gujarat 364002, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Jogendra Kumar
- Inorganic Materials and Catalysis Division, CSIR-Central Salt and Marine Chemicals Research Institute, G.B. Marg, Bhavnagar, Gujarat 364002, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Eliza Ghosh
- School of Chemical Sciences, Indian Association for the Cultivation of Science, Kolkata 700032, India
| | - Tapan Kanti Paine
- School of Chemical Sciences, Indian Association for the Cultivation of Science, Kolkata 700032, India
| | - Sukalyan Bhadra
- Inorganic Materials and Catalysis Division, CSIR-Central Salt and Marine Chemicals Research Institute, G.B. Marg, Bhavnagar, Gujarat 364002, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
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2
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Pompeo MM, Kelly SM, St-Jean F, Bass TM, Dalton DM, Zell D, Han C, Sirois LE, Gosselin F. Umpolung Flow Chemistry for the Synthesis of a 3-Oxo-3 H-spiro[benzofuran-2,4'-piperidine] Building Block. J Org Chem 2024. [PMID: 38767619 DOI: 10.1021/acs.joc.4c00337] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/22/2024]
Abstract
An efficient and scalable route to tert-butyl 3-oxo-3H-spiro[benzofuran-2,4'-piperidine]-1'-carboxylate, a central prochiral intermediate in the synthesis of SHP2 inhibitor GDC-1971 (migoprotafib), was achieved. Preparation of the title compound from readily available 2-fluorobenzaldehyde included formation of a modified Katritzky benzotriazole hemiaminal, which, upon deprotonation by n-butyllithium, participated in umpolung reactivity via 1,2-addition to tert-butyl 4-oxopiperidine-1-carboxylate (N-Boc-4-piperidone). Most notably, this reaction was developed as a robust plug-flow process that could be executed on multiple kilograms without the need for pilot-scale reaction vessels operating at low cryogenic temperatures. Treatment of the resulting tetrahedral intermediate with oxalic acid resulted in collapse to the corresponding 4-(2-fluorobenzoyl)-4-hydroxypiperidine, which was isolated as a solid via crystallization. The synthesis concluded with an optimized intramolecular SNAr reaction and final crystallization to generate tert-butyl 3-oxo-3H-spiro[benzofuran-2,4'-piperidine]-1'-carboxylate as a stable, high-quality intermediate suitable for further functionalization toward GDC-1971.
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Affiliation(s)
- Matthew M Pompeo
- Department of Synthetic Molecule Process Chemistry, Genentech, Inc., 1 DNA Way, South San Francisco, California 94080, United States
| | - Sean M Kelly
- Department of Synthetic Molecule Process Chemistry, Genentech, Inc., 1 DNA Way, South San Francisco, California 94080, United States
| | - Frédéric St-Jean
- Department of Synthetic Molecule Process Chemistry, Genentech, Inc., 1 DNA Way, South San Francisco, California 94080, United States
| | - Thomas M Bass
- Department of Synthetic Molecule Process Chemistry, Genentech, Inc., 1 DNA Way, South San Francisco, California 94080, United States
| | - Derek M Dalton
- Department of Synthetic Molecule Process Chemistry, Genentech, Inc., 1 DNA Way, South San Francisco, California 94080, United States
| | - Daniel Zell
- Department of Synthetic Molecule Process Chemistry, Genentech, Inc., 1 DNA Way, South San Francisco, California 94080, United States
| | - Chong Han
- Department of Synthetic Molecule Process Chemistry, Genentech, Inc., 1 DNA Way, South San Francisco, California 94080, United States
| | - Lauren E Sirois
- Department of Synthetic Molecule Process Chemistry, Genentech, Inc., 1 DNA Way, South San Francisco, California 94080, United States
| | - Francis Gosselin
- Department of Synthetic Molecule Process Chemistry, Genentech, Inc., 1 DNA Way, South San Francisco, California 94080, United States
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3
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Wei J, Meng J, Zhang C, Liu Y, Jiao N. Dioxygen compatible electron donor-acceptor catalytic system and its enabled aerobic oxygenation. Nat Commun 2024; 15:1886. [PMID: 38424055 PMCID: PMC10904740 DOI: 10.1038/s41467-024-45866-z] [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: 08/28/2023] [Accepted: 02/06/2024] [Indexed: 03/02/2024] Open
Abstract
The photochemical properties of Electron Donor-Acceptor (EDA) complexes present exciting opportunities for synthetic chemistry. However, these strategies often require an inert atmosphere to maintain high efficiency. Herein, we develop an EDA complex photocatalytic system through rational design, which overcomes the oxygen-sensitive limitation of traditional EDA photocatalytic systems and enables aerobic oxygenation reactions through dioxygen activation. The mild oxidation system transfers electrons from the donor to the effective catalytic acceptor upon visible light irradiation, which are subsequently captured by molecular oxygen to form the superoxide radical ion, as demonstrated by the specific fluorescent probe, dihydroethidine (DHE). Furthermore, this visible-light mediated oxidative EDA protocol is successfully applied in the aerobic oxygenation of boronic acids. We believe that this photochemical dioxygen activation strategy enabled by EDA complex not only provides a practical approach to aerobic oxygenation but also promotes the design and application of EDA photocatalysis under ambient conditions.
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Affiliation(s)
- Jialiang Wei
- State Key Laboratory of Natural and Biomimetic Drugs, Peking University, 100191, Beijing, China
- Changping Laboratory, Yard 28, Science Park Road, Changping District, 102206, Beijing, China
| | - Junhong Meng
- State Key Laboratory of Natural and Biomimetic Drugs, Peking University, 100191, Beijing, China
| | - Caifang Zhang
- State Key Laboratory of Natural and Biomimetic Drugs, Peking University, 100191, Beijing, China
| | - Yameng Liu
- State Key Laboratory of Natural and Biomimetic Drugs, Peking University, 100191, Beijing, China
| | - Ning Jiao
- State Key Laboratory of Natural and Biomimetic Drugs, Peking University, 100191, Beijing, China.
- Changping Laboratory, Yard 28, Science Park Road, Changping District, 102206, Beijing, China.
- State Key Laboratory of Organometallic Chemistry Sciences, Chinese Academy of Sciences, Shanghai, 200032, China.
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4
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Yang J, Zhang P, Shen Z, Yu ZX. Rh(I)-Catalyzed [4+3]/[4+1] Cycloaddition of Diene-Vinylcyclopropanes and Carbon Monoxide to Access Angular 5/7/5 Tricycles. Chemistry 2024; 30:e202303407. [PMID: 37917044 DOI: 10.1002/chem.202303407] [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: 10/16/2023] [Revised: 10/27/2023] [Accepted: 11/02/2023] [Indexed: 11/03/2023]
Abstract
Report here is a Rh-catalyzed [4+3]/[4+1] cycloaddition of diene-vinylcyclopropanes (diene-VCPs) and carbon monoxide to access compounds with angular 5/7/5 tricyclic skeleton found in natural products. The reaction has broad scope and further transformation of the [4+3]/[4+1] cycloadduct was also investigated. How this [4+3]/[4+1] reaction occurs and why its competing [4+3] reaction is disfavored have been investigated computationally.
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Affiliation(s)
- Jun Yang
- Beijing National Laboratory for Molecular Sciences (BNLMS), Key Laboratory of Bioorganic Chemistry and, Molecular Engineering of Ministry of Education, College of Chemistry, Peking University, Beijing, 100871, China
| | - Pan Zhang
- Beijing National Laboratory for Molecular Sciences (BNLMS), Key Laboratory of Bioorganic Chemistry and, Molecular Engineering of Ministry of Education, College of Chemistry, Peking University, Beijing, 100871, China
| | - Zeyuan Shen
- Beijing National Laboratory for Molecular Sciences (BNLMS), Key Laboratory of Bioorganic Chemistry and, Molecular Engineering of Ministry of Education, College of Chemistry, Peking University, Beijing, 100871, China
| | - Zhi-Xiang Yu
- Beijing National Laboratory for Molecular Sciences (BNLMS), Key Laboratory of Bioorganic Chemistry and, Molecular Engineering of Ministry of Education, College of Chemistry, Peking University, Beijing, 100871, China
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5
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Lu M, Chen K, Wu T, Cai H. Electrochemical Decarboxylative Alkoxy-alkoxycarbonylation of Alkenes. Org Lett 2024; 26:188-192. [PMID: 38127651 DOI: 10.1021/acs.orglett.3c03816] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2023]
Abstract
A method is presented for decarboxylative alkoxy-alkoxycarbonylation of various alkenes with alcohols by electrochemical anodic oxidation of monopotassium ethyloxalate salts with good functional group compatibility. The reaction involves anodic oxidation to form an acyl radical, followed by addition to an olefin to yield a new alkyl radical, which is anodically oxidized to a carbon cation and captured by alcohols to afford β-alkoxyalkanoates. Adding catalytic amounts of ammonium iodide enhanced the efficiency of the reactions.
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Affiliation(s)
- Meiqun Lu
- School of Chemistry and Chemical Engineering, Nanchang University, Nanchang, Jiangxi 330031, P. R. China
| | - Kailun Chen
- School of Chemistry and Chemical Engineering, Nanchang University, Nanchang, Jiangxi 330031, P. R. China
| | - Tao Wu
- School of Chemistry and Chemical Engineering, Nanchang University, Nanchang, Jiangxi 330031, P. R. China
| | - Hu Cai
- School of Chemistry and Chemical Engineering, Nanchang University, Nanchang, Jiangxi 330031, P. R. China
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6
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Song TT, Mei YK, Liu Y, Wang XY, Guo SY, Ji DW, Wan B, Yuan W, Chen QA. Construction of Bridged Benzazepines via Photo-Induced Dearomatization. Angew Chem Int Ed Engl 2024; 63:e202314304. [PMID: 38009446 DOI: 10.1002/anie.202314304] [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: 09/24/2023] [Revised: 11/24/2023] [Accepted: 11/24/2023] [Indexed: 11/28/2023]
Abstract
Bridged benzazepine scaffolds, possessing unique structural and physicochemical activities, are widespread in various natural products and drugs. The construction of these skeletons often requires elaborate synthetic effort with low efficiency. Herein, we develop a simple and divergent approach for constructing various bridged benzazepines by a photocatalytic intermolecular dearomatization of naphthalene derivatives with readily available α-amino acids. The bridged motif is created via a cascade sequence involving photocatalytic 1,4-hydroaminoalkylation, alkene isomerization and cyclization. Interestingly, the diastereoselectivity can be regulated through different reaction modes in the cyclization step. Moreover, aminohydroxylation and its further bromination have also been demonstrated to access highly functionalized bridged benzazepines. Preliminary mechanistic studies have been performed to get insights into the mechanism. This method provides a divergent synthetic approach for construction of highly functionalized bridged benzazepines, which have been otherwise difficult to access.
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Affiliation(s)
- Ting-Ting Song
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian, 116023, China
| | - Yong-Kang Mei
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian, 116023, China
- University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Yan Liu
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian, 116023, China
- University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Xiao-Yu Wang
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian, 116023, China
- University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Shi-Yu Guo
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian, 116023, China
| | - Ding-Wei Ji
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian, 116023, China
| | - Boshun Wan
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian, 116023, China
| | - Weiming Yuan
- Key Laboratory of Material Chemistry for Energy Conversion and Storage, Ministry of Education, Hubei Key Laboratory of Bioinorganic Chemistry and Materia Medica, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan, 430074, China
| | - Qing-An Chen
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian, 116023, China
- University of Chinese Academy of Sciences, Beijing, 100049, China
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7
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Steparuk EV, Meshcheryakova EA, Viktorova VV, Ulitko MV, Obydennov DL, Sosnovskikh VY. Oxidative Ring-Opening Transformation of 5-Acyl-4-pyrones as an Approach for the Tunable Synthesis of Hydroxylated Pyrones and Furans. J Org Chem 2023; 88:11590-11602. [PMID: 37504952 DOI: 10.1021/acs.joc.3c00907] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/29/2023]
Abstract
A selective and tunable approach for oxidation of 4-pyrones has been developed via ring-opening transformations leading to various hydroxylated oxaheterocycles. The first step of the strategy includes the base-catalyzed epoxidation of 5-acyl-4-pyrones in the presence of hydrogen peroxide for the effective synthesis of pyrone epoxides in high yields. The epoxides bearing the CO2Et group are reactive molecules that can undergo both pyrone and oxirane ring-opening via deformylation to produce hydroxylated 2-pyrones or 4-pyrones. The acid-promoted transformation led to 3-hydroxy-4-pyrones (24-76% yields), whereas the K2CO3-catalyzed ring-opening process of 2-carbethoxy-4-pyrone epoxides proceeded as an attack of alcohol at the C-3 position bearing the CO2Et group to give functionalized 6-acyl-5-hydroxy-2-pyrones (27-87% yields). The base-catalyzed reaction of 2-aryl-4-pyrone epoxides was followed by ring contraction and the dearoylation process to produce 3-hydroxyfuran-2-carbaldehydes in 42-80% yields. The transformation of 3-aroylchromone epoxides led to flavonols and 3-hydroxybenzofuran-2-carbaldehyde in the acidic and basic conditions, respectively. The prepared hydroxylated heterocycles demonstrated high reactivity for further transformations and low cytotoxicity and are promising fluorophores or UV filters.
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Affiliation(s)
- Elena V Steparuk
- Institute of Natural Sciences and Mathematics, Ural Federal University, 51 Lenina Ave., 620000 Ekaterinburg, Russian Federation
| | - Ekaterina A Meshcheryakova
- Institute of Natural Sciences and Mathematics, Ural Federal University, 51 Lenina Ave., 620000 Ekaterinburg, Russian Federation
| | - Viktoria V Viktorova
- Institute of Natural Sciences and Mathematics, Ural Federal University, 51 Lenina Ave., 620000 Ekaterinburg, Russian Federation
| | - Maria V Ulitko
- Institute of Natural Sciences and Mathematics, Ural Federal University, 51 Lenina Ave., 620000 Ekaterinburg, Russian Federation
| | - Dmitrii L Obydennov
- Institute of Natural Sciences and Mathematics, Ural Federal University, 51 Lenina Ave., 620000 Ekaterinburg, Russian Federation
| | - Vyacheslav Y Sosnovskikh
- Institute of Natural Sciences and Mathematics, Ural Federal University, 51 Lenina Ave., 620000 Ekaterinburg, Russian Federation
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8
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Ammon E, Khomutetckaia A, Villinger A, Ehlers P, Langer P. Serendipitous discovery of Pd-catalyzed intramolecular cyclization of ortho-bromo(hetero)aryl-substituted (hetero)aryl-1,2-diketones: Applications in the synthesis of carba- and heterocyclic benzoin derivatives. Tetrahedron 2023. [DOI: 10.1016/j.tet.2023.133335] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/06/2023]
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9
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Zhao Q, Wang Y, Wang Y, Hu Q, Yao J, Wen Z, Li H. Control of Selectivity in FeCl 3 -Catalyzed Aerobic Oxidation of Cycloketones. Chem Asian J 2023; 18:e202201101. [PMID: 36519526 DOI: 10.1002/asia.202201101] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2022] [Revised: 12/12/2022] [Accepted: 12/12/2022] [Indexed: 12/23/2022]
Abstract
The FeCl3 -catalyzed aerobic oxidation of ketones always gives rise to the α-C-C cleavage product, having challenges to afford hydroxyl keto compounds. Here we report an effective control of the main product from keto acid to α-hydroxyl ketone, by reducing the concentration of FeCl3 catalyst, together with the use of DMSO as the solvent. In addition, mechanistic investigations suggested the same FeCl3 -coordinated peroxide intermediate for both hydroxylation and C-C cleavage routes, and emphasize the role of DMSO as both ligand and reductant. This work provides a new approach for selective aerobic oxidation under Lewis acid catalysis.
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Affiliation(s)
- Qi Zhao
- Department of Chemistry and ZJU-NHU United R&D Center, Zhejiang University, Zhe Da Rd. 38, Hangzhou, 310027, P. R. China
| | - Yongtao Wang
- Department of Chemistry and ZJU-NHU United R&D Center, Zhejiang University, Zhe Da Rd. 38, Hangzhou, 310027, P. R. China
- Center of Chemistry for Frontier Technologies, Zhejiang University, Zhe Da Rd. 38, Hangzhou, 310027, P. R. China
| | - Yu Wang
- Department of Chemistry and ZJU-NHU United R&D Center, Zhejiang University, Zhe Da Rd. 38, Hangzhou, 310027, P. R. China
| | - Qixuan Hu
- Department of Chemistry and ZJU-NHU United R&D Center, Zhejiang University, Zhe Da Rd. 38, Hangzhou, 310027, P. R. China
| | - Jia Yao
- Department of Chemistry and ZJU-NHU United R&D Center, Zhejiang University, Zhe Da Rd. 38, Hangzhou, 310027, P. R. China
| | - Zeyu Wen
- Department of Chemistry and ZJU-NHU United R&D Center, Zhejiang University, Zhe Da Rd. 38, Hangzhou, 310027, P. R. China
| | - Haoran Li
- Department of Chemistry and ZJU-NHU United R&D Center, Zhejiang University, Zhe Da Rd. 38, Hangzhou, 310027, P. R. China
- State Key Laboratory of Chemical Engineering and College of Chemical and Biological Engineering, Zhejiang University, Zhe Da Rd. 38, Hangzhou, 310027, P. R. China
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10
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Employing Cu(II) complexes of N,O-donor ligand for catalysis in visible light driven cleavage of lignin C-C bonds. MOLECULAR CATALYSIS 2023. [DOI: 10.1016/j.mcat.2023.112947] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
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11
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French SA, Sumby CJ, Huang DM, George JH. Total Synthesis of Atrachinenins A and B. J Am Chem Soc 2022; 144:22844-22849. [DOI: 10.1021/jacs.2c09978] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Sarah A. French
- Department of Chemistry, The University of Adelaide, Adelaide, SA 5005, Australia
| | - Christopher J. Sumby
- Department of Chemistry, The University of Adelaide, Adelaide, SA 5005, Australia
| | - David M. Huang
- Department of Chemistry, The University of Adelaide, Adelaide, SA 5005, Australia
| | - Jonathan H. George
- Department of Chemistry, The University of Adelaide, Adelaide, SA 5005, Australia
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12
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Sun Y, Tang W, Ni H, Wang M, Huang B, Long YQ. Convergent synthesis of tetrahydropyranyl side chain of verucopeptin, an antitumor antibiotic active against multidrug-resistant cancers. Chem Commun (Camb) 2022; 58:13447-13450. [PMID: 36350039 DOI: 10.1039/d2cc04529j] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
A concise synthesis of the tetrahydropyranyl side chain of verucopeptin, an antitumor antibiotic cyclodepsipeptide efficacious against MDR cancers in vivo, is achieved using 12 steps in the longest linear sequence and 21 total steps, in which Julia-Kocienski olefination for the segments coupling, asymmetric hydroxylation as well as stereoselective synthesis of stable tetrahydropyran ring from a D-isoascorbic acid derivative are key steps. This convergent synthetic strategy enables the structural modification and mechanism study of verucopeptin for its clinical applications.
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Affiliation(s)
- Yuanjun Sun
- Laboratory of Medicinal Chemical Biology, College of Pharmaceutical Sciences, Soochow University, Suzhou 215123, China.
| | - Wenhao Tang
- Laboratory of Medicinal Chemical Biology, College of Pharmaceutical Sciences, Soochow University, Suzhou 215123, China.
| | - Huxin Ni
- Laboratory of Medicinal Chemical Biology, College of Pharmaceutical Sciences, Soochow University, Suzhou 215123, China.
| | - Mei Wang
- Laboratory of Medicinal Chemical Biology, College of Pharmaceutical Sciences, Soochow University, Suzhou 215123, China.
| | - Bin Huang
- Laboratory of Medicinal Chemical Biology, College of Pharmaceutical Sciences, Soochow University, Suzhou 215123, China.
| | - Ya-Qiu Long
- Laboratory of Medicinal Chemical Biology, College of Pharmaceutical Sciences, Soochow University, Suzhou 215123, China.
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13
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Zhang X, Yu Y, Li W, Shi L, Li H. Access to α-Hydroxy Amides via a Practical Metal-Free “One-Pot” Tandem Reaction Involving Aerobic C(sp 3)–H Hydroxylation and C(sp 2)–C(sp 3) Cleavage. J Org Chem 2022; 87:16263-16275. [DOI: 10.1021/acs.joc.2c01839] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/09/2022]
Affiliation(s)
- Xiao Zhang
- State Key Laboratory of Bioreactor Engineering, Shanghai Key Laboratory of New Drug Design, and School of Pharmacy, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, China
| | - Yang Yu
- State Key Laboratory of Bioreactor Engineering, Shanghai Key Laboratory of New Drug Design, and School of Pharmacy, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, China
| | - Wenjie Li
- State Key Laboratory of Bioreactor Engineering, Shanghai Key Laboratory of New Drug Design, and School of Pharmacy, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, China
| | - Lei Shi
- Döhler Food & Beverage Ingredients (Shanghai) Co., Ltd., 739 Shennan Road, Shanghai 201108, China
| | - Hao Li
- State Key Laboratory of Bioreactor Engineering, Shanghai Key Laboratory of New Drug Design, and School of Pharmacy, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, China
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14
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Borowiecki P. Chemoenzymatic Synthesis of Optically Active Ethereal Analog of iso-Moramide-A Novel Potentially Powerful Analgesic †. Int J Mol Sci 2022; 23:ijms231911803. [PMID: 36233106 PMCID: PMC9569485 DOI: 10.3390/ijms231911803] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2022] [Revised: 09/27/2022] [Accepted: 09/28/2022] [Indexed: 11/16/2022] Open
Abstract
To develop potent and safer analgesics, we designed and synthesized a novel enantiomerically enriched ethereal analog of (R)-iso-moramide, namely 2-[(2R)-2-(morpholin-4-yl)propoxy]-2,2-diphenyl-1-(pyrrolidin-1-yl)ethan-1-one. The titled active agent can potentially serve as a powerful synthetic opiate with an improved affinity and selectivity toward opioid receptors (ORs). This hypothesis was postulated based on docking studies regarding the respective complexes between the designed ligand and µ-OR, δ-OR, and κ-OR. The key step of the elaborated asymmetric synthesis of novel analog involves lipase-catalyzed kinetic resolution of racemic 1-(morpholin-4-yl)propan-2-ol, which was accomplished on a 10 g scale via an enantioselective transesterification employing vinyl acetate as an irreversible acyl donor in tert-butyl methyl ether (MTBE) as the co-solvent. Next, the obtained homochiral (S)-(+)-morpholino-alcohol (>99% ee) was functionalized into corresponding chloro-derivative using thionyl chloride (SOCl2) or the Appel reaction conditions. Further transformation with N-diphenylacetyl-1-pyrrolidine under phase-transfer catalysis (PTC) conditions using O2-saturated DMSO/NaOH mixture as an oxidant furnished the desired levorotatory isomer of the title product isolated in 26% total yield after three steps, and with 89% ee. The absolute configuration of the key-intermediate of (R)-(−)-iso-moramide was determined using a modified form of Mosher’s methodology. The preparation of the optically active dextrorotatory isomer of the titled product (87% ee) was carried out essentially by the same route, utilizing (R)-(−)-1-(morpholin-4-yl)propan-2-ol (98% ee) as a key intermediate. The spectroscopic characterization of the ethereal analog of iso-moramide and the enantioselective retention relationship of its enantiomers using HPLC on the cellulose-based chiral stationary phase were performed. Moreover, as a proof-of-principle, single-crystal X-ray diffraction (XRD) analysis of the synthesized 2-[(2R)-2-(morpholin-4-yl)propoxy]-2,2-diphenyl-1-(pyrrolidin-1-yl)ethan-1-one is reported.
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Affiliation(s)
- Paweł Borowiecki
- Laboratory of Biocatalysis and Biotransformation, Department of Drugs Technology and Biotechnology, Faculty of Chemistry, Warsaw University of Technology, Koszykowa St. 75, 00-662 Warsaw, Poland
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15
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Wang Y, Sun W, Lu R, Wen Z, Yao J, Li H. Inorganic Bases Enhanced Organocatalysis for Aerobic αHydroxylation of Aliphatic Cycloketones. ASIAN J ORG CHEM 2022. [DOI: 10.1002/ajoc.202200443] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Yongtao Wang
- Zhejiang University Department of Chemistry CHINA
| | - Wenjing Sun
- Zhejiang University Department of Chemistry CHINA
| | - Rui Lu
- Zhejiang University Department of Chemistry CHINA
| | - Zeyu Wen
- Zhejiang University Department of Chemistry CHINA
| | - Jia Yao
- Zhejiang University Department of Chemistry CHINA
| | - Haoran Li
- Zhejiang University Department of Chemistry Zheda Road 310027 Hangzhou CHINA
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16
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Gao Y, Qin W, Tian M, Zhao X, Hu X. Defluorinative Alkylation of Trifluoromethyl Alkenes with Soft Carbon Nucleophiles Enabled by a Catalytic Amount of Base. Adv Synth Catal 2022. [DOI: 10.1002/adsc.202200328] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Ya Gao
- Institute of Advanced Synthesis School of Chemistry and Molecular Engineering Nanjing Tech University 30 South Puzhu Road Nanjing 211816 People's Republic of China
| | - Wei Qin
- Institute of Advanced Synthesis School of Chemistry and Molecular Engineering Nanjing Tech University 30 South Puzhu Road Nanjing 211816 People's Republic of China
| | - Ming‐Qing Tian
- Institute of Advanced Synthesis School of Chemistry and Molecular Engineering Nanjing Tech University 30 South Puzhu Road Nanjing 211816 People's Republic of China
| | - Xuefei Zhao
- Institute of Advanced Synthesis School of Chemistry and Molecular Engineering Nanjing Tech University 30 South Puzhu Road Nanjing 211816 People's Republic of China
| | - Xu‐Hong Hu
- Institute of Advanced Synthesis School of Chemistry and Molecular Engineering Nanjing Tech University 30 South Puzhu Road Nanjing 211816 People's Republic of China
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17
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Huang J, Zhang R, Wu X, Dong G, Xia Y. Intramolecular One-Carbon Homologation of Unstrained Ketones via C-C Activation-Enabled 1,1-Insertion of Alkenes. Org Lett 2022; 24:2436-2440. [PMID: 35302376 DOI: 10.1021/acs.orglett.2c00716] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
Here, we describe the development of a Rh-catalyzed intramolecular one-carbon homologation of unstrained aryl ketones through a formal 1,1-insertion process of olefins, enabled by temporary directing group (TDG)-aided C-C activation. The reaction provides a distinct approach to access various substituted 1-indanones. Computational mechanistic studies reveal that the formal 1,1-insertion is realized by a selective C(sp2)-C(sp3) activation and turnover limiting 2,1-insertion into the alkene, followed by a facile β-H elimination and reinsertion process.
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Affiliation(s)
- Jiangkun Huang
- West China School of Public Health and West China Fourth Hospital, and State Key Laboratory of Biotherapy, Sichuan University, Chengdu 610041, China
| | - Rui Zhang
- Department of Chemistry, University of Chicago, Chicago 60637, United States
| | - Xiuli Wu
- West China School of Public Health and West China Fourth Hospital, and State Key Laboratory of Biotherapy, Sichuan University, Chengdu 610041, China
| | - Guangbin Dong
- Department of Chemistry, University of Chicago, Chicago 60637, United States
| | - Ying Xia
- West China School of Public Health and West China Fourth Hospital, and State Key Laboratory of Biotherapy, Sichuan University, Chengdu 610041, China
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18
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Xu C, Li X, Bai L. Direct Aerobic α-Hydroxylation of Arylacetates for the Synthesis of Mandelates. J Org Chem 2022; 87:4298-4304. [PMID: 35245055 DOI: 10.1021/acs.joc.1c03149] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Aerobic α-hydroxylation of α-methylene esters has proven challenging due to overoxidation and hydrolysis of the materials. In this article, KOtBu-promoted TBAB-catalyzed α-hydroxylation of α-methylene aryl esters using O2 as the oxygen source has been developed. Both low reaction temperature and catalyst TBAB are keys to success. This reaction provides an environmentally friendly and low-cost approach to mandelates, which are valuable building blocks and widely present in pharmaceuticals.
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Affiliation(s)
- Changming Xu
- School of Chemistry and Chemical Engineering, Lanzhou Jiaotong University, Lanzhou 730070, China
| | - Xiangfan Li
- School of Chemistry and Chemical Engineering, Lanzhou Jiaotong University, Lanzhou 730070, China
| | - Lei Bai
- College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou 730070, China
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19
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Zhou Q, Song X, Zhang X, Fan X. Synthesis of Spiro[benzo[ d][1,3]oxazine-4,4'-isoquinoline]s via [4+1+1] Annulation of N-Aryl Amidines with Diazo Homophthalimides and O 2. Org Lett 2022; 24:1280-1285. [PMID: 35129363 DOI: 10.1021/acs.orglett.1c04193] [Citation(s) in RCA: 18] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Synthesis of spiro[benzo[d][1,3]oxazine-4,4'-isoquinoline]s through a unique [4+1+1] annulation of N-aryl amidines with diazo homophthalimides and O2 is presented. This unprecedented spirocyclization reaction features readily obtainable substrates, structurally and pharmaceutically attractive products, a cost-free and clean oxygen source, sustainable reaction medium, tolerance of a broad spectrum of functional groups, and an interesting reaction mechanism based on sequential C(sp2)-H/C(sp3)-H bond cleavage and oxygen insertion.
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Affiliation(s)
- Qianting Zhou
- NMPA Key Laboratory for Research and Evaluation of Innovative Drugs, Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan 453007, China
| | - Xia Song
- NMPA Key Laboratory for Research and Evaluation of Innovative Drugs, Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan 453007, China
| | - Xinying Zhang
- NMPA Key Laboratory for Research and Evaluation of Innovative Drugs, Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan 453007, China
| | - Xuesen Fan
- NMPA Key Laboratory for Research and Evaluation of Innovative Drugs, Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan 453007, China
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20
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Guo L, Xu Z, Tong R. Asymmetric Total Synthesis of Indole Diterpenes Paspalicine, Paspalinine, and Paspalinine‐13‐ene. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202115384] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Lian‐Dong Guo
- Department of Chemistry The Hong Kong University of Science and Technology Clearwater Bay Kowloon, Hong Kong China
| | - Zejun Xu
- Department of Chemistry The Hong Kong University of Science and Technology Clearwater Bay Kowloon, Hong Kong China
| | - Rongbiao Tong
- Department of Chemistry The Hong Kong University of Science and Technology Clearwater Bay Kowloon, Hong Kong China
- Hong Kong Branch of the Guangdong Southern Marine Science and Engineering Laboratory (Guangzhou) The Hong Kong University of Science and Technology Clearwater Bay Kowloon, Hong Kong China
- HKUST Shenzhen Research Institute Shenzhen 518057 China
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21
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Wang J, Lv Y, Shang Y, Cui Z, Wang KH, Huang D, Hu Y. Research Progress of Reactions Participated by α-Hydroxy Ketones. CHINESE J ORG CHEM 2022. [DOI: 10.6023/cjoc202203007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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22
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Guo LD, Xu Z, Tong R. Asymmetric Total Synthesis of Indole Diterpenes Paspalicine, Paspalinine, and Paspalinine-13-ene. Angew Chem Int Ed Engl 2021; 61:e202115384. [PMID: 34784090 DOI: 10.1002/anie.202115384] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2021] [Indexed: 11/08/2022]
Abstract
Paspaline-derived indole diterpenes (IDTs) are structurally complex mycotoxins with unique tremorgenic activity. Reported are asymmetric total syntheses of three paspaline-derived IDTs paspalicine, paspalinine and paspalinine-13-ene. Our synthesis features a green Achmatowicz rearrangement/bicycloketalization for the efficient construction of FG rings (75 % yield) and a cascade ring-closing metathesis of dienyne for highly regioselective formation of CD rings (72 % yield). Other highlights include four palladium-mediated reactions (Stille, aza-Wacker, Suzuki, and Heck) to forge the BE rings and the installation of two continuous all-carbon quaternary stereocenters via reductive ring-opening of cyclopropane and α-methylation of the conjugate ester. Our new synthetic strategy is expected to be applicable to the chemical synthesis of other paspaline-derived IDTs and will facilitate the bioactivity studies of these agriculturally and pharmacologically important IDTs.
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Affiliation(s)
- Lian-Dong Guo
- Department of Chemistry, The Hong Kong University of Science and Technology Clearwater Bay, Kowloon, Hong Kong, China
| | - Zejun Xu
- Department of Chemistry, The Hong Kong University of Science and Technology Clearwater Bay, Kowloon, Hong Kong, China
| | - Rongbiao Tong
- Department of Chemistry, The Hong Kong University of Science and Technology Clearwater Bay, Kowloon, Hong Kong, China.,Hong Kong Branch of the Guangdong Southern Marine Science and Engineering Laboratory (Guangzhou), The Hong Kong University of Science and Technology Clearwater Bay, Kowloon, Hong Kong, China.,HKUST Shenzhen Research Institute, Shenzhen, 518057, China
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23
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Wang Y, Yang M, Lao C, Jiang Z. C-H bond cleavage-enabled aerobic ring-opening reaction of in situ formed 2-aminobenzofuran-3(2 H)-ones. Org Biomol Chem 2021; 19:9448-9459. [PMID: 34693412 DOI: 10.1039/d1ob01755a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A C-H bond cleavage-enabled aerobic ring-opening reaction of 2-aminobenzofuran-3(2H)-ones formed in situ by hemiacetals with a variety of amines is reported. This simple one-pot reaction provides an alternative approach to obtain o-hydroxyaryl glyoxylamides in excellent yields of up to 97%. Alkylamines react with hemiacetals via a catalyst-free dehydration condensation to generate 2-aminobenzofuran-3(2H)-ones. The in situ formed semicyclic N,O-acetals undergo the same amine-initiated C-H bond hydroxylation in air under mild conditions to afford ring-opening products. Similarly, arylamines were investigated as substrates for a two-step tandem process involving a DPP-catalyzed condensation followed by a Et2NH-mediated C-H hydroxylation. Unlike the previously reported functionalization of N,O-acetals via a C-O or C-N cleavage, the aerobic oxidative C-H hydroxylation in this reaction, which is promoted by using stoichiometric amounts of alkylamines as both a Lewis base and a reductant at room temperature under atmospheric air, proceeds via α-carbonyl-stabilized carbanion intermediates from the C-H cleavage of N,O-acetals.
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Affiliation(s)
- Yingwei Wang
- State Key Laboratory of Quality Research in Chinese Medicines, Macau University of Science and Technology, Macau 999078, China.
| | - Mingrong Yang
- State Key Laboratory of Quality Research in Chinese Medicines, Macau University of Science and Technology, Macau 999078, China.
| | - Chichou Lao
- State Key Laboratory of Quality Research in Chinese Medicines, Macau University of Science and Technology, Macau 999078, China. .,Faculty of Chinese Medicine, Macau University of Science and Technology, Macau 999078, China
| | - Zhihong Jiang
- State Key Laboratory of Quality Research in Chinese Medicines, Macau University of Science and Technology, Macau 999078, China.
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24
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Kimura K, Kurahashi T, Matsubara S. Aerobic Direct Dioxygenation of Terminal/Internal Alkynes to α-Hydroxyketones by an Fe Porphyrin Catalyst. Chem Asian J 2021; 16:3615-3618. [PMID: 34523231 DOI: 10.1002/asia.202101019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2021] [Revised: 09/10/2021] [Indexed: 11/10/2022]
Abstract
We herein report a new synthetic method for the preparation of α-hydroxyketones by the dioxygenation of alkynes. The reaction proceeds at room temperature under the action of Fe porphyrin and pinacolborane under air as a green oxidant to produce α-hydroxyketones. The mild reaction conditions allow chemoselective oxidation with functional group tolerance. Terminal alkynes in addition to internal alkynes are applicable, affording unsymmetrical α-hydroxyketones that are difficult to obtain by any reported dioxygenation of unsaturated C-C bonds.
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Affiliation(s)
- Kento Kimura
- Department of Material Chemistry, Graduate School of Engineering, Kyoto University, Kyoto, 615-8510, Japan
| | - Takuya Kurahashi
- Department of Material Chemistry, Graduate School of Engineering, Kyoto University, Kyoto, 615-8510, Japan
| | - Seijiro Matsubara
- Department of Material Chemistry, Graduate School of Engineering, Kyoto University, Kyoto, 615-8510, Japan
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25
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Li Y, Feng X, Jia X, Jin H, Chen F, Zhao Y, Zhang J, Wang J, Guo B, Tang L, Yang Y. Regiodivergent Functionalization of Isoquinoline‐1,3(2
H
,4
H
)‐dione Derivatives via Aerobic Umpolung. ASIAN J ORG CHEM 2021. [DOI: 10.1002/ajoc.202100194] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Ying‐Xian Li
- State Key Laboratory of Functions and Applications of Medicinal Plants School of Pharmacy Guizhou Provincial Engineering Technology Research Center for Chemical Drug R&D Guizhou Medical University 550014 Guiyang P. R. China
| | - Xiao‐Bing Feng
- Xiao-Bing Feng Department of orthopaedics People's Hospital of Luzhou 646000 Luzhou P. R. China
| | - Xue‐Min Jia
- State Key Laboratory of Functions and Applications of Medicinal Plants School of Pharmacy Guizhou Provincial Engineering Technology Research Center for Chemical Drug R&D Guizhou Medical University 550014 Guiyang P. R. China
| | - Huang Jin
- State Key Laboratory of Functions and Applications of Medicinal Plants School of Pharmacy Guizhou Provincial Engineering Technology Research Center for Chemical Drug R&D Guizhou Medical University 550014 Guiyang P. R. China
| | - Fei Chen
- State Key Laboratory of Functions and Applications of Medicinal Plants School of Pharmacy Guizhou Provincial Engineering Technology Research Center for Chemical Drug R&D Guizhou Medical University 550014 Guiyang P. R. China
| | - Yong‐Long Zhao
- State Key Laboratory of Functions and Applications of Medicinal Plants School of Pharmacy Guizhou Provincial Engineering Technology Research Center for Chemical Drug R&D Guizhou Medical University 550014 Guiyang P. R. China
| | - Ji‐Quan Zhang
- State Key Laboratory of Functions and Applications of Medicinal Plants School of Pharmacy Guizhou Provincial Engineering Technology Research Center for Chemical Drug R&D Guizhou Medical University 550014 Guiyang P. R. China
| | - Jian‐Ta Wang
- State Key Laboratory of Functions and Applications of Medicinal Plants School of Pharmacy Guizhou Provincial Engineering Technology Research Center for Chemical Drug R&D Guizhou Medical University 550014 Guiyang P. R. China
| | - Bing Guo
- Guizhou Provincial Key Laboratory of Pathogenesis and Drug Research on Common Chronic Diseases Guizhou Medical University 550004 Guiyang P. R. China
| | - Lei Tang
- State Key Laboratory of Functions and Applications of Medicinal Plants School of Pharmacy Guizhou Provincial Engineering Technology Research Center for Chemical Drug R&D Guizhou Medical University 550014 Guiyang P. R. China
| | - Yuan‐Yong Yang
- State Key Laboratory of Functions and Applications of Medicinal Plants School of Pharmacy Guizhou Provincial Engineering Technology Research Center for Chemical Drug R&D Guizhou Medical University 550014 Guiyang P. R. China
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26
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Liu C, Zhu C, Cai Y, Jiang H. Solvent-Switched Oxidation Selectivities with O 2 : Controlled Synthesis of α-Difluoro(thio)methylated Alcohols and Ketones. Angew Chem Int Ed Engl 2021; 60:12038-12045. [PMID: 33704886 DOI: 10.1002/anie.202017271] [Citation(s) in RCA: 28] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2020] [Indexed: 12/12/2022]
Abstract
The solvent-switched hydroxylation and oxygenation of α-difluoro(thio)methylated carbanions with molecular oxygen under mild conditions are reported. This strategy tames the redox reactions of the in situ generated hydroperoxy difluoromethylsulfides, in which solvent-bonding can alter their reactivity and switch the oxidation selectivities. These controllable three-component reactions of gem-difluoroalkenes, thiols and molecular oxygen afford various useful α-difluoro(thio)methylated alcohols and ketones in high yields. Significantly, this protocol has been applied in the synthesis different bioactive molecules. Mechanism studies enable the detection of the hydroperoxy difluoromethylsulfide intermediates and exclude the thiol-based radical pathway.
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Affiliation(s)
- Chi Liu
- Key Laboratory of Functional Molecular Engineering of Guangdong Province, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou, 510640, P. R. China
| | - Chuanle Zhu
- Key Laboratory of Functional Molecular Engineering of Guangdong Province, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou, 510640, P. R. China
| | - Yingying Cai
- Key Laboratory of Functional Molecular Engineering of Guangdong Province, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou, 510640, P. R. China
| | - Huanfeng Jiang
- Key Laboratory of Functional Molecular Engineering of Guangdong Province, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou, 510640, P. R. China
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27
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Liu C, Zhu C, Cai Y, Jiang H. Solvent‐Switched Oxidation Selectivities with O
2
: Controlled Synthesis of α‐Difluoro(thio)methylated Alcohols and Ketones. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202017271] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Chi Liu
- Key Laboratory of Functional Molecular Engineering of Guangdong Province School of Chemistry and Chemical Engineering South China University of Technology Guangzhou 510640 P. R. China
| | - Chuanle Zhu
- Key Laboratory of Functional Molecular Engineering of Guangdong Province School of Chemistry and Chemical Engineering South China University of Technology Guangzhou 510640 P. R. China
| | - Yingying Cai
- Key Laboratory of Functional Molecular Engineering of Guangdong Province School of Chemistry and Chemical Engineering South China University of Technology Guangzhou 510640 P. R. China
| | - Huanfeng Jiang
- Key Laboratory of Functional Molecular Engineering of Guangdong Province School of Chemistry and Chemical Engineering South China University of Technology Guangzhou 510640 P. R. China
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28
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Meninno S, Villano R, Lattanzi A. Magnesium Monoperphthalate (MMPP): a Convenient Oxidant for the Direct Rubottom Oxidation of Malonates, β‐Keto Esters, and Amides. European J Org Chem 2021. [DOI: 10.1002/ejoc.202100098] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Affiliation(s)
- Sara Meninno
- Dipartimento di Chimica e Biologia “A. Zambelli” Università di Salerno Via Giovanni Paolo II 132 84084 Fisciano Italy
| | - Rosaria Villano
- Istituto di Chimica Biomolecolare - CNR Via Campi Flegrei 34 80078 Pozzuoli Italy
| | - Alessandra Lattanzi
- Dipartimento di Chimica e Biologia “A. Zambelli” Università di Salerno Via Giovanni Paolo II 132 84084 Fisciano Italy
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29
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Wang Y, Wen Z, Zhang Y, Wang X, Yao J, Li H. Aerobic α-hydroxylation of 2-Me-1-tetralone in 1-alkyl-3-methylimidazolium ionic liquids. Phys Chem Chem Phys 2021; 23:5864-5869. [PMID: 33687394 DOI: 10.1039/d0cp06047j] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
The aerobic α-hydroxylation of 2-Me-1-tetralone was investigated in imidazol-based ionic liquids (ILs), where reactions in 1-alkyl-3-methylimidazolium tetrafluoroborates were found to generate considerable products. By correlating the conversion at 2 h with viscosity, relative permittivity and the ET(30) value of ILs, we found that the local polarity in ILs represented by the ET(30) value or the chemical shift of α-proton at the substrate was the critical factor influencing the reaction rate. Furthermore, two-dimensional nuclear Overhauser effect spectroscopy (2D NOESY) was used to characterize the distribution of 2-Me-1-tetralone in ILs. As a result, the mesoscopic structures in ILs were recommended to have crucial influences on the distribution of the substrate in ILs, and the caused local polarity could affect the activation of 2-Me-1-tetralone. These findings revealed the solvent effects of ILs with different structures on the α-hydroxylation of 2-Me-1-tetralone, and may encourage the explorations of more types of aerobic oxidations in ILs.
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Affiliation(s)
- Yongtao Wang
- Department of Chemistry, ZJU-NHU United R&D Center, Zhejiang University, 38 Zheda Road, Hangzhou, 310027, China. and Center of Chemistry for Frontier Technologies, Zhejiang University, Hangzhou, 310027, China
| | - Zeyu Wen
- Department of Chemistry, ZJU-NHU United R&D Center, Zhejiang University, 38 Zheda Road, Hangzhou, 310027, China. and Center of Chemistry for Frontier Technologies, Zhejiang University, Hangzhou, 310027, China
| | - Yue Zhang
- Department of Chemistry, ZJU-NHU United R&D Center, Zhejiang University, 38 Zheda Road, Hangzhou, 310027, China.
| | - Xinyu Wang
- Department of Chemistry, ZJU-NHU United R&D Center, Zhejiang University, 38 Zheda Road, Hangzhou, 310027, China.
| | - Jia Yao
- Department of Chemistry, ZJU-NHU United R&D Center, Zhejiang University, 38 Zheda Road, Hangzhou, 310027, China.
| | - Haoran Li
- Department of Chemistry, ZJU-NHU United R&D Center, Zhejiang University, 38 Zheda Road, Hangzhou, 310027, China. and State Key Laboratory of Chemical Engineering, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou, 310027, China
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30
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Wang Y, Lu R, Yao J, Li H. 1,5,7-Triazabicyclo[4.4.0]dec-5-ene Enhances Activity of Peroxide Intermediates in Phosphine-Free α-Hydroxylation of Ketones. Angew Chem Int Ed Engl 2021; 60:6631-6638. [PMID: 33289252 DOI: 10.1002/anie.202014478] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2020] [Revised: 11/28/2020] [Indexed: 12/29/2022]
Abstract
The critical role of double hydrogen bonds was addressed for the aerobic α-hydroxylation of ketones catalyzed by 1,5,7-triazabicyclo[4.4.0]dec-5-ene (TBD), in the absence of either a metal catalyst or phosphine reductant. Experimental and theoretical investigations were performed to study the mechanism. In addition to initiating the reaction by proton abstraction, a more important role of TBD was revealed, that is, to enhance the oxidizing ability of peroxide intermediates, allowing DMSO to be used rather than commonly used phosphine reductants. Further characterizations with nuclear Overhauser effect spectroscopy (NOESY) confirmed the presence of double hydrogen bonds between TBD and the ketone, and kinetic studies suggested the attack of dioxygen on the TBD-enol adduct to be the rate-determining step. This work should encourage the application of TBD as a catalyst for oxidations.
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Affiliation(s)
- Yongtao Wang
- Department of Chemistry and ZJU-NHU United R&D Center, Zhejiang University, 38 Zheda Road, Hangzhou, 310027, P. R. China
| | - Rui Lu
- Department of Chemistry and ZJU-NHU United R&D Center, Zhejiang University, 38 Zheda Road, Hangzhou, 310027, P. R. China
| | - Jia Yao
- Department of Chemistry and ZJU-NHU United R&D Center, Zhejiang University, 38 Zheda Road, Hangzhou, 310027, P. R. China
| | - Haoran Li
- Department of Chemistry and ZJU-NHU United R&D Center, Zhejiang University, 38 Zheda Road, Hangzhou, 310027, P. R. China.,State Key Laboratory of Chemical Engineering and College of Chemical and Biological Engineering, Zhejiang University, 38 Zheda Road, Hangzhou, 310027, P. R. China
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31
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Wang Y, Lu R, Yao J, Li H. 1,5,7‐Triazabicyclo[4.4.0]dec‐5‐ene Enhances Activity of Peroxide Intermediates in Phosphine‐Free α‐Hydroxylation of Ketones. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202014478] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Yongtao Wang
- Department of Chemistry and ZJU-NHU United R&D Center Zhejiang University 38 Zheda Road Hangzhou 310027 P. R. China
| | - Rui Lu
- Department of Chemistry and ZJU-NHU United R&D Center Zhejiang University 38 Zheda Road Hangzhou 310027 P. R. China
| | - Jia Yao
- Department of Chemistry and ZJU-NHU United R&D Center Zhejiang University 38 Zheda Road Hangzhou 310027 P. R. China
| | - Haoran Li
- Department of Chemistry and ZJU-NHU United R&D Center Zhejiang University 38 Zheda Road Hangzhou 310027 P. R. China
- State Key Laboratory of Chemical Engineering and College of Chemical and Biological Engineering Zhejiang University 38 Zheda Road Hangzhou 310027 P. R. China
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32
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Sahoo PK, Zhang Y, Das S. CO 2-Promoted Reactions: An Emerging Concept for the Synthesis of Fine Chemicals and Pharmaceuticals. ACS Catal 2021. [DOI: 10.1021/acscatal.0c05681] [Citation(s) in RCA: 39] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Prakash Kumar Sahoo
- Department of Chemistry, University of Antwerp, Groenenborgerlaan 171, 2020 Antwerpen, Belgium
| | - Yu Zhang
- Department of Chemistry, University of Antwerp, Groenenborgerlaan 171, 2020 Antwerpen, Belgium
| | - Shoubhik Das
- Department of Chemistry, University of Antwerp, Groenenborgerlaan 171, 2020 Antwerpen, Belgium
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33
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Yoon Lee C, Kim S. Highly Efficient DMSO‐Promoted α‐Hydrolysis of α‐Halohydroxamates under Mild Conditions. European J Org Chem 2021. [DOI: 10.1002/ejoc.202100088] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Chang Yoon Lee
- Department of Chemistry Kyonggi University 154-42 Gwanggyosan-ro, Yeongtong-gu Suwon 16227 Republic of Korea
| | - Sung‐Gon Kim
- Department of Chemistry Kyonggi University 154-42 Gwanggyosan-ro, Yeongtong-gu Suwon 16227 Republic of Korea
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34
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Kieslich D, Christoffers J. Formation of δ-Lactones by Cyanide Catalyzed Rearrangement of α-Hydroxy-β-oxoesters. Org Lett 2021; 23:953-957. [PMID: 33464092 DOI: 10.1021/acs.orglett.0c04157] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
δ-Valerolactone derivatives are formed by cyanide-catalyzed ring-transformation of cyclic α-hydroxy-β-oxoesters. This unprecedented reaction defines a new synthetic methodology, and the products are obtained in up to quantitative yields. Several alkyl substitutions as well as different ester residues are tolerated. Furthermore, benzo- and heteroarene-annulated starting materials are converted without problems. As an additional benefit, the starting materials are straightforwardly accessed by cerium-catalyzed aerobic α-hydroxylation of readily available β-oxoesters.
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Affiliation(s)
- David Kieslich
- Institut für Chemie, Universität Oldenburg, Carl-von-Ossietzky-Str. 9-11, D-26111 Oldenburg, Germany
| | - Jens Christoffers
- Institut für Chemie, Universität Oldenburg, Carl-von-Ossietzky-Str. 9-11, D-26111 Oldenburg, Germany
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35
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Wang T, Zhou Y, Xu Y, Cheng GJ. Computational exploration of copper catalyzed vinylogous aerobic oxidation of unsaturated compounds. Sci Rep 2021; 11:1304. [PMID: 33446723 PMCID: PMC7809353 DOI: 10.1038/s41598-020-80188-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2020] [Accepted: 12/09/2020] [Indexed: 11/23/2022] Open
Abstract
Selective oxidation is one of the most important and challenging transformations in both academic research and chemical industry. Recently, a highly selective and efficient way to synthesize biologically active γ-hydroxy-α,β-unsaturated molecules from Cu-catalyzed vinylogous aerobic oxidation of α,β- and β,γ-unsaturated compounds has been developed. However, the detailed reaction mechanism remains elusive. Herein, we report a density functional theory study on this Cu-catalyzed vinylogous aerobic oxidation of γ,γ-disubstituted α,β- and β,γ-unsaturated isomers. Our computational study unveils detailed mechanism for each elementary step, i.e. deprotonation, O2 activation, and reduction. Besides, the origin of regioselectivity, divergent reactivities of substrates as well as reducing agents, and the byproduct generation have also been investigated. Notably, the copper catalyst retains the + 2 oxidation state through the whole catalytic cycle and plays essential roles in multiple steps. These findings would provide hints on mechanistic studies and future development of transition metal-catalyzed aerobic oxidation reactions.
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Affiliation(s)
- Ting Wang
- Warshel Institute for Computational Biology, Shenzhen Key Laboratory of Steroid Drug Development, School of Life and Health Sciences, The Chinese University of Hong Kong (Shenzhen), Shenzhen, 518172, China
| | - Yu Zhou
- Warshel Institute for Computational Biology, Shenzhen Key Laboratory of Steroid Drug Development, School of Life and Health Sciences, The Chinese University of Hong Kong (Shenzhen), Shenzhen, 518172, China
- School of Life Sciences, University of Science and Technology of China, Hefei, 230027, Anhui, China
| | - Yao Xu
- Warshel Institute for Computational Biology, Shenzhen Key Laboratory of Steroid Drug Development, School of Life and Health Sciences, The Chinese University of Hong Kong (Shenzhen), Shenzhen, 518172, China
- School of Life Sciences, University of Science and Technology of China, Hefei, 230027, Anhui, China
| | - Gui-Juan Cheng
- Warshel Institute for Computational Biology, Shenzhen Key Laboratory of Steroid Drug Development, School of Life and Health Sciences, The Chinese University of Hong Kong (Shenzhen), Shenzhen, 518172, China.
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36
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Khan I, Ibrar A, Zaib S. Alkynoates as Versatile and Powerful Chemical Tools for the Rapid Assembly of Diverse Heterocycles under Transition-Metal Catalysis: Recent Developments and Challenges. Top Curr Chem (Cham) 2021; 379:3. [PMID: 33398642 DOI: 10.1007/s41061-020-00316-4] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2020] [Accepted: 11/16/2020] [Indexed: 12/15/2022]
Abstract
Heterocycles, heteroaromatics and spirocyclic entities are ubiquitous components of a wide plethora of synthetic drugs, biologically active natural products, marketed pharmaceuticals and agrochemical targets. Recognizing their high proportion in drugs and rich pharmacological potential, these invaluable structural motifs have garnered significant interest, thus enabling the development of efficient catalytic methodologies providing access to architecturally complex and diverse molecules with high atom-economy and low cost. These chemical processes not only allow the formation of diverse heterocycles but also utilize a range of flexible and easily accessible building units in a single operation to discover diversity-oriented synthetic approaches. Alkynoates are significantly important, diverse and powerful building blocks in organic chemistry due to their unique and inherent properties such as the electronic bias on carbon-carbon triple bonds posed by electron-withdrawing groups or the metallic coordination site provided by carbonyl groups. The present review highlights the comprehensive picture of the utility of alkynoates (2007-2019) for the synthesis of various heterocycles (> 50 types) using transition-metal catalysts (Ru, Rh, Pd, Ir, Ag, Au, Pt, Cu, Mn, Fe) in various forms. The valuable function of versatile alkynoates (bearing multifunctional groups) as simple and useful starting materials is explored, thus cyclizing with an array of coupling partners to deliver a broad range of oxygen-, nitrogen-, sulfur-containing heterocycles alongside fused-, and spiro-heterocyclic compounds. In addition, these examples will also focus the scope and reaction limitations, as well as mechanistic investigations into the synthesis of these heterocycles. The biological significance will also be discussed, citing relevant examples of drug molecules highlighting each class of heterocycles. This review summarizes the recent developments in the synthetic methods for the synthesis of various heterocycles using alkynoates as readily available starting materials under transition-metal catalysis.
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Affiliation(s)
- Imtiaz Khan
- Department of Chemistry, School of Natural Sciences, The University of Manchester, Oxford Road, Manchester, M13 9PL, UK.
- Manchester Institute of Biotechnology, The University of Manchester, 131 Princess Street, Manchester, M1 7DN, UK.
| | - Aliya Ibrar
- Department of Chemistry, Faculty of Natural Sciences, The University of Haripur, Haripur, KPK-22620, Pakistan
| | - Sumera Zaib
- Department of Biochemistry, Faculty of Life Sciences, University of Central Punjab, Lahore, 54590, Pakistan
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37
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Vil' VA, Gorlov ES, Yu B, Terent'ev AO. Oxidative α-acyloxylation of acetals with cyclic diacyl peroxides. Org Chem Front 2021. [DOI: 10.1039/d1qo00494h] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Selective functionalization of the non-activated acetal α-position with formal retaining of the acetal fragment was realized using cyclic diacyl peroxides.
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Affiliation(s)
- Vera A. Vil'
- N. D. Zelinsky Institute of Organic Chemistry
- Russian Academy of Sciences
- Moscow
- Russian Federation
- All-Russian Research Institute for Phytopathology B. Vyazyomy
| | - Evgenii S. Gorlov
- N. D. Zelinsky Institute of Organic Chemistry
- Russian Academy of Sciences
- Moscow
- Russian Federation
| | - Bing Yu
- Green Catalysis Center
- College of Chemistry
- Zhengzhou University
- Zhengzhou 450001
- P. R. China
| | - Alexander O. Terent'ev
- N. D. Zelinsky Institute of Organic Chemistry
- Russian Academy of Sciences
- Moscow
- Russian Federation
- All-Russian Research Institute for Phytopathology B. Vyazyomy
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38
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Tian W, Li M, Yang S, Zhang H, Liu H, Xiao X. Copper Corrole as an Efficient Catalyst for Esterification of Allylic sp 3-C—H Bonds with Carboxylic Acids. CHINESE J ORG CHEM 2021. [DOI: 10.6023/cjoc202101023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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39
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Wang D, Shi Z, Zhang X, Cui Z, Wang Q. O 2-Mediated transformation of 9-phenanthrenol: an approach to the synthesis of phenanthrenyl ketal and 9-fluorenones. Org Chem Front 2021. [DOI: 10.1039/d0qo01234c] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
We report the first example for O2-mediated oxidation of 9-phenanthrenol to phenanthrenyl ketal under basic conditions, followed by transformation to 9-fluorenones.
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Affiliation(s)
- Dongwei Wang
- International Joint Research Laboratory of Nano-Micro Architecture Chemistry (NMAC)
- Department of Organic Chemistry
- College of Chemistry
- Jilin University
- Changchun 130012
| | - Zuosen Shi
- State Key Laboratory of Supramolecular Structure and Materials
- Jilin University
- Changchun 130012
- P. R. China
| | - Xueyou Zhang
- International Joint Research Laboratory of Nano-Micro Architecture Chemistry (NMAC)
- Department of Organic Chemistry
- College of Chemistry
- Jilin University
- Changchun 130012
| | - Zhanchen Cui
- State Key Laboratory of Supramolecular Structure and Materials
- Jilin University
- Changchun 130012
- P. R. China
| | - Qifeng Wang
- International Joint Research Laboratory of Nano-Micro Architecture Chemistry (NMAC)
- Department of Organic Chemistry
- College of Chemistry
- Jilin University
- Changchun 130012
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40
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Tan H, Wang S, Yan Z, Liu J, Wei J, Song S, Jiao N. N‐Heterocyclic Carbene Catalyzed Ester Synthesis from Organic Halides through Incorporation of Oxygen Atoms from Air. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202011039] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Hui Tan
- State Key Laboratory of Natural and Biomimetic Drugs School of Pharmaceutical Sciences Peking University Xue Yuan Rd. 38 Beijing 100191 China
| | - Shen‐An Wang
- State Key Laboratory of Natural and Biomimetic Drugs School of Pharmaceutical Sciences Peking University Xue Yuan Rd. 38 Beijing 100191 China
| | - Zixi Yan
- State Key Laboratory of Natural and Biomimetic Drugs School of Pharmaceutical Sciences Peking University Xue Yuan Rd. 38 Beijing 100191 China
| | - Jianzhong Liu
- State Key Laboratory of Natural and Biomimetic Drugs School of Pharmaceutical Sciences Peking University Xue Yuan Rd. 38 Beijing 100191 China
| | - Jialiang Wei
- State Key Laboratory of Natural and Biomimetic Drugs School of Pharmaceutical Sciences Peking University Xue Yuan Rd. 38 Beijing 100191 China
| | - Song Song
- State Key Laboratory of Natural and Biomimetic Drugs School of Pharmaceutical Sciences Peking University Xue Yuan Rd. 38 Beijing 100191 China
| | - Ning Jiao
- State Key Laboratory of Natural and Biomimetic Drugs School of Pharmaceutical Sciences Peking University Xue Yuan Rd. 38 Beijing 100191 China
- State Key Laboratory of Organometallic Chemistry Chinese Academy of Sciences Shanghai 200032 China
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41
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Tan H, Wang S, Yan Z, Liu J, Wei J, Song S, Jiao N. N‐Heterocyclic Carbene Catalyzed Ester Synthesis from Organic Halides through Incorporation of Oxygen Atoms from Air. Angew Chem Int Ed Engl 2020; 60:2140-2144. [DOI: 10.1002/anie.202011039] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2020] [Revised: 09/23/2020] [Indexed: 11/09/2022]
Affiliation(s)
- Hui Tan
- State Key Laboratory of Natural and Biomimetic Drugs School of Pharmaceutical Sciences Peking University Xue Yuan Rd. 38 Beijing 100191 China
| | - Shen‐An Wang
- State Key Laboratory of Natural and Biomimetic Drugs School of Pharmaceutical Sciences Peking University Xue Yuan Rd. 38 Beijing 100191 China
| | - Zixi Yan
- State Key Laboratory of Natural and Biomimetic Drugs School of Pharmaceutical Sciences Peking University Xue Yuan Rd. 38 Beijing 100191 China
| | - Jianzhong Liu
- State Key Laboratory of Natural and Biomimetic Drugs School of Pharmaceutical Sciences Peking University Xue Yuan Rd. 38 Beijing 100191 China
| | - Jialiang Wei
- State Key Laboratory of Natural and Biomimetic Drugs School of Pharmaceutical Sciences Peking University Xue Yuan Rd. 38 Beijing 100191 China
| | - Song Song
- State Key Laboratory of Natural and Biomimetic Drugs School of Pharmaceutical Sciences Peking University Xue Yuan Rd. 38 Beijing 100191 China
| | - Ning Jiao
- State Key Laboratory of Natural and Biomimetic Drugs School of Pharmaceutical Sciences Peking University Xue Yuan Rd. 38 Beijing 100191 China
- State Key Laboratory of Organometallic Chemistry Chinese Academy of Sciences Shanghai 200032 China
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42
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Liu Y, Yu Y, Sun C, Fu Y, Mang Z, Shi L, Li H. Transition-Metal Free Chemoselective Hydroxylation and Hydroxylation–Deuteration of Heterobenzylic Methylenes. Org Lett 2020; 22:8127-8131. [DOI: 10.1021/acs.orglett.0c03108] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Affiliation(s)
- Yonghai Liu
- State Key Laboratory of Bioreactor Engineering, Shanghai Key Laboratory of New Drug Design, and School of Pharmacy, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, China
| | - Yang Yu
- State Key Laboratory of Bioreactor Engineering, Shanghai Key Laboratory of New Drug Design, and School of Pharmacy, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, China
| | - Chengyu Sun
- State Key Laboratory of Bioreactor Engineering, Shanghai Key Laboratory of New Drug Design, and School of Pharmacy, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, China
| | - Yiwei Fu
- State Key Laboratory of Bioreactor Engineering, Shanghai Key Laboratory of New Drug Design, and School of Pharmacy, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, China
| | - Zhiguo Mang
- State Key Laboratory of Bioreactor Engineering, Shanghai Key Laboratory of New Drug Design, and School of Pharmacy, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, China
| | - Lei Shi
- Corporate R&D Division, Firmenich Aromatics (China) Company, Ltd., Shanghai 201108, China
| | - Hao Li
- State Key Laboratory of Bioreactor Engineering, Shanghai Key Laboratory of New Drug Design, and School of Pharmacy, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, China
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43
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Kalshetti R, Ramana CV. Oxidative Rearrangement of Stilbenes to 2,2-Diaryl-2-hydroxyacetaldehydes. ACS OMEGA 2020; 5:25199-25208. [PMID: 33043198 PMCID: PMC7542859 DOI: 10.1021/acsomega.0c03328] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/11/2020] [Accepted: 08/13/2020] [Indexed: 06/11/2023]
Abstract
A one-pot oxone-mediated/iodine-catalyzed oxidative rearrangement of stilbenes leading to 2,2-diaryl-2-hydroxyacetaldehydes is described. Control experiments revealed that a 2,2-diarylacetaldehyde was initially formed that undergoes subsequent α-hydroxylation. The resulting α-hydroxyaldehydes have been subjected to a one-pot Still-Gennari olefination followed by cyclization, leading to 5,5-diaryl-γ-butenolides.
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Affiliation(s)
- Rupali
G. Kalshetti
- Division
of Organic Chemistry, CSIR-National Chemical
Laboratory, Dr. Homi Bhabha Road, Pune 411 008, India
- Academy
of Scientific and Innovative Research (AcSIR), Anusandhan Bhawan, 2 Rafi Marg, New Delhi 110002, India
| | - Chepuri V. Ramana
- Division
of Organic Chemistry, CSIR-National Chemical
Laboratory, Dr. Homi Bhabha Road, Pune 411 008, India
- Academy
of Scientific and Innovative Research (AcSIR), Anusandhan Bhawan, 2 Rafi Marg, New Delhi 110002, India
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44
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Liu S, Zhao F, Chen X, Deng G, Huang H. Aerobic Oxidative Functionalization of Indoles. Adv Synth Catal 2020. [DOI: 10.1002/adsc.202000285] [Citation(s) in RCA: 40] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Saiwen Liu
- College of Materials and Chemical Engineering Hunan City University Yiyang 413000 Hunan People's Republic of China
| | - Feng Zhao
- Key Laboratory for Antibody-based Drug and Intelligent Delivery System of Hunan Province Key Laboratory of Dong Medicine of Hunan Province School of Pharmaceutical Sciences Hunan University of Medicine Huaihua 418000 People's Republic of China
- Key Laboratory for Green Organic Synthesis and Application of Hunan Province Key Laboratory of Environmentally Friendly Chemistry and Application of Ministry of Education College of Chemistry Xiangtan University Xiangtan 411105 People's Republic of China
| | - Xing Chen
- Key Laboratory for Green Organic Synthesis and Application of Hunan Province Key Laboratory of Environmentally Friendly Chemistry and Application of Ministry of Education College of Chemistry Xiangtan University Xiangtan 411105 People's Republic of China
| | - Guo‐Jun Deng
- Key Laboratory for Green Organic Synthesis and Application of Hunan Province Key Laboratory of Environmentally Friendly Chemistry and Application of Ministry of Education College of Chemistry Xiangtan University Xiangtan 411105 People's Republic of China
| | - Huawen Huang
- Key Laboratory for Green Organic Synthesis and Application of Hunan Province Key Laboratory of Environmentally Friendly Chemistry and Application of Ministry of Education College of Chemistry Xiangtan University Xiangtan 411105 People's Republic of China
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45
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Gao S, Gao X, Wu Z, Li H, Yang Z, Zhang F. Process for ( S)-Ketamine and ( S)-Norketamine via Resolution Combined with Racemization. J Org Chem 2020; 85:8656-8664. [PMID: 32510222 DOI: 10.1021/acs.joc.0c01090] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A concise, recyclable, and efficient process is presented for the preparation of (S)-ketamine (esketamine, (S)-1a) via classic resolution combined with the recycling of the undesired isomer. With commercially available ketone 2 as the starting material, this procedure features three steps including (1) an unique hydroxylation-ring expansion rearrangement, (2) mild amination via methanesulfonate, and (3) chiral separation using L-(+)-tartaric acid. The three simple steps are all performed in mild conditions and (S)-1a tartrate is obtained in 99.5% ee without recrystallization. Subsequently, racemization of the unwanted (R)-1a remained in resolution mother liquor was performed in the presence of a Lewis acid in quantitative yield with >99.0% chemical purity. This original and economical process afforded esketamine in 67.4% (28.9% without racemization) overall yield with two times recycling of the mother liquor without column purification. In addition, this procedure can also be applied to the preparation of (S)-norketamine, which is a safer potential antidepressant.
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Affiliation(s)
- Shenghua Gao
- China State Institute of Pharmaceutical Industry, Shanghai Institute of Pharmaceutical Industry, 285 Gebaini Road, Pudong District, Shanghai 201203, China
| | - Xuezhi Gao
- China State Institute of Pharmaceutical Industry, Shanghai Institute of Pharmaceutical Industry, 285 Gebaini Road, Pudong District, Shanghai 201203, China
| | - Zenong Wu
- School of Pharmacy, Fudan University, 826 Zhangheng Road, Pudong District, Shanghai 201203, China
| | - Houyong Li
- College of Chemistry and Chemical Engineering, Shanghai University of Engineering Science, 333 Longteng Road, Shanghai 201620, China
| | - Zhezhou Yang
- China State Institute of Pharmaceutical Industry, Shanghai Institute of Pharmaceutical Industry, 285 Gebaini Road, Pudong District, Shanghai 201203, China
| | - Fuli Zhang
- China State Institute of Pharmaceutical Industry, Shanghai Institute of Pharmaceutical Industry, 285 Gebaini Road, Pudong District, Shanghai 201203, China.,College of Chemistry and Chemical Engineering, Shanghai University of Engineering Science, 333 Longteng Road, Shanghai 201620, China
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46
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Kreibich M, Gemander M, Peter D, Yadav DB, de Koning CB, Fernandes MA, Green IR, van Otterlo WAL, Brückner R. 6,7‐Benzotropolone Syntheses Based on Ring‐Closing Metatheses and Four‐Electron Oxidations. European J Org Chem 2020. [DOI: 10.1002/ejoc.202000256] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Michael Kreibich
- Institut für Organische Chemie Albert‐Ludwigs‐Universität Albertstraße 21 79104 Freiburg Germany
| | - Manuel Gemander
- Institut für Organische Chemie Albert‐Ludwigs‐Universität Albertstraße 21 79104 Freiburg Germany
| | - David Peter
- Institut für Organische Chemie Albert‐Ludwigs‐Universität Albertstraße 21 79104 Freiburg Germany
| | - Dharmendra B. Yadav
- Molecular Sciences Institute School of Chemistry University of the Witwatersrand PO Wits 2050 Johannesburg South Africa
| | - Charles B. de Koning
- Molecular Sciences Institute School of Chemistry University of the Witwatersrand PO Wits 2050 Johannesburg South Africa
| | - Manuel A. Fernandes
- Molecular Sciences Institute School of Chemistry University of the Witwatersrand PO Wits 2050 Johannesburg South Africa
| | - Ivan R. Green
- Department of Chemistry and Polymer Science Stellenbosch University Private Bag X1, Matieland 7602 Stellenbosch Western Cape South Africa
| | - Willem A. L. van Otterlo
- Molecular Sciences Institute School of Chemistry University of the Witwatersrand PO Wits 2050 Johannesburg South Africa
- Department of Chemistry and Polymer Science Stellenbosch University Private Bag X1, Matieland 7602 Stellenbosch Western Cape South Africa
| | - Reinhard Brückner
- Institut für Organische Chemie Albert‐Ludwigs‐Universität Albertstraße 21 79104 Freiburg Germany
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47
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da Silva AF, Afonso MAS, Cormanich RA, Jurberg ID. Room Temperature Coupling of Aryldiazoacetates with Boronic Acids Enhanced by Blue Light Irradiation. Chemistry 2020; 26:5648-5653. [PMID: 31999021 DOI: 10.1002/chem.201905812] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/25/2019] [Indexed: 12/21/2022]
Abstract
A visible-light-promoted photochemical protocol is reported for the coupling of aryldiazoacetates with boronic acids. This photochemical reaction shows great enhancement compared to the same protocol performed in the absence of light. Except for a few cases, the room temperature coupling in the dark (thermal process) generally does not work. When it does, it is likely to also involve free carbenes as key intermediates. Alternatively, photochemical reactions show a broad scope, can be performed under air and tolerate a wide variety of functional groups. Reaction-evolution monitoring, DFT calculations and control experiments have been used to evaluate the main aspects of this intricate mechanistic scenario. Biologically active molecules Adiphenine, Benactyzine and Aprophen have been prepared as examples of synthetic applications.
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Affiliation(s)
- Amanda F da Silva
- Department of Organic Chemistry, Institute of Chemistry, State University of Campinas, Rua Monteiro Lobato 270, 13083-862, Campinas, SP, Brazil
| | - Marco A S Afonso
- Department of Organic Chemistry, Institute of Chemistry, State University of Campinas, Rua Monteiro Lobato 270, 13083-862, Campinas, SP, Brazil
| | - Rodrigo A Cormanich
- Department of Organic Chemistry, Institute of Chemistry, State University of Campinas, Rua Monteiro Lobato 270, 13083-862, Campinas, SP, Brazil
| | - Igor D Jurberg
- Department of Organic Chemistry, Institute of Chemistry, State University of Campinas, Rua Monteiro Lobato 270, 13083-862, Campinas, SP, Brazil
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48
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Markus J, Puchľová E, Pinčeková L, Moncol J, Doháňošová J, Berkeš D, Caletková O. Synthesis and Derivatization of 3‐Aroyl Pyroglutamic Acids. ChemistrySelect 2020. [DOI: 10.1002/slct.202000162] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Jozef Markus
- Department of Organic Chemistry Radlinského 9 812 37 Bratislava Slovak Republic
| | - Eva Puchľová
- Department of Organic Chemistry Radlinského 9 812 37 Bratislava Slovak Republic
| | - Lucia Pinčeková
- Department of Organic Chemistry Radlinského 9 812 37 Bratislava Slovak Republic
| | - Ján Moncol
- Department of Inorganic Chemistry Radlinského 9 812 37 Bratislava Slovak Republic
| | - Jana Doháňošová
- Central Laboratories Faculty of Chemical and Food Technology, Slovak University of Technology Radlinského 9 812 37 Bratislava Slovak Republic
| | - Dušan Berkeš
- Department of Organic Chemistry Radlinského 9 812 37 Bratislava Slovak Republic
| | - Oľga Caletková
- Department of Organic Chemistry Radlinského 9 812 37 Bratislava Slovak Republic
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49
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Kassin VEH, Toupy T, Petit G, Bianchi P, Salvadeo E, Monbaliu JCM. Metal-free hydroxylation of tertiary ketones under intensified and scalable continuous flow conditions. J Flow Chem 2020. [DOI: 10.1007/s41981-019-00073-6] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
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50
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Fülöp Z, Szemesi P, Bana P, Éles J, Greiner I. Evolution of flow-oriented design strategies in the continuous preparation of pharmaceuticals. REACT CHEM ENG 2020. [DOI: 10.1039/d0re00273a] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
This review focuses on the flow-oriented design (FOD) in the multi-step continuous-flow synthesis of active pharmaceutical ingredients.
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Affiliation(s)
- Zsolt Fülöp
- Department of Organic Chemistry and Technology
- Budapest University of Technology and Economics
- 1521 Budapest
- Hungary
| | - Péter Szemesi
- Department of Organic Chemistry and Technology
- Budapest University of Technology and Economics
- 1521 Budapest
- Hungary
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