1
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Islam B, Sulochana SP, Colby DA. Synthesis of α,α-Difluoro-β-amino Ketones from N-Boc-α-Amidosulfones and Pentafluoro- gem-diols. J Org Chem 2024; 89:6506-6512. [PMID: 38606727 DOI: 10.1021/acs.joc.3c02181] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/13/2024]
Abstract
To circumvent the synthesis and isolation of imines, a method was devised to construct α,α-difluoro-β-amino ketones from N-Boc-α-amidosulfones. The reactive nucleophiles, difluoroenolates, are generated in situ from the pentafluoro-gem-diols using cesium fluoride in pyridine. NMR studies confirm the role of the α-amidosulfones in this process. Incubation of the α,α-difluoro-β-amino ketones in rat serum demonstrates the relative stability of this structure as well as its value as a chemical probe or lead.
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Affiliation(s)
- Baharul Islam
- Department of BioMolecular Sciences, University of Mississippi, University, Mississippi 38677, United States
| | - Suresh P Sulochana
- Department of Pharmaceutics and Drug Delivery, University of Mississippi, University, Mississippi 38677, United States
| | - David A Colby
- Department of BioMolecular Sciences, University of Mississippi, University, Mississippi 38677, United States
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2
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Dong H, Lin Z, Wang C. Cobalt‐Catalyzed Allylic Defluorinative Cross‐Electrophile Coupling between 1,1‐Difluoroalkyl Halides and α‐Trifluoromethyl Styrenes. Adv Synth Catal 2023. [DOI: 10.1002/adsc.202300171] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/09/2023]
Affiliation(s)
- Haiyan Dong
- Department of Chemistry Center for Excellence in Molecular Synthesis of CAS University of Science and Technology of China Hefei Anhui 230026 People's Republic of China
| | - Zhiyang Lin
- Department of Chemistry Center for Excellence in Molecular Synthesis of CAS University of Science and Technology of China Hefei Anhui 230026 People's Republic of China
| | - Chuan Wang
- Department of Chemistry Center for Excellence in Molecular Synthesis of CAS University of Science and Technology of China Hefei Anhui 230026 People's Republic of China
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3
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Wang XY, Yang M, Zhou Y, Zhou J, Hao YJ. A highly efficient metal-free selective 1,4-addition of difluoroenoxysilanes to chromones. Org Biomol Chem 2023; 21:1033-1037. [PMID: 36625240 DOI: 10.1039/d2ob02152h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
A highly efficient metal-free selective 1,4-addition reaction of difluoroenoxysilanes to chromones was developed using the low-cost and readily available HOTf as the catalyst, which is a facile and straightforward method to access valuable C2-difluoroalkylated chroman-4-one derivatives. Interestingly, the products could be readily converted to the difluorinated bioisostere of the natural product (S)-2,6-dimethylchroman-4-one and a difluorinated benzo-seven-membered heterocycle via the Schmidt rearrangement reaction. In addition, the in vitro anti-proliferative activities of these synthesized derivatives against human colon carcinoma cells (HCT116) revealed that compound 3g exhibited potent inhibitory effect on HCT116 cancer cells with an IC50 value of 6.37 μM, representing a novel lead compound for further structural optimization and biological evaluation.
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Affiliation(s)
- Xi-Yu Wang
- School of Pharmacy, Guizhou University of Traditional Chinese Medicine, Guiyang 550025, China.
| | - Min Yang
- School of Pharmacy, Guizhou University of Traditional Chinese Medicine, Guiyang 550025, China.
| | - Ying Zhou
- School of Pharmacy, Guizhou University of Traditional Chinese Medicine, Guiyang 550025, China.
| | - Jian Zhou
- Shanghai Engineering Research Center of Molecular Therapeutics and New Drug Development, and Shanghai Key Laboratory of Green Chemistry and Chemical Processes, School of Chemistry and Molecular Engineering, East China Normal University, Shanghai 200062, China. .,School of Pharmacy, Guizhou University of Traditional Chinese Medicine, Guiyang 550025, China.
| | - Yong-Jia Hao
- School of Pharmacy, Guizhou University of Traditional Chinese Medicine, Guiyang 550025, China.
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4
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Sanz-Marco A, Esperilla D, Montesinos-Magraner M, Vila C, Muñoz MC, Pedro JR, Blay G. A Cu-BOX catalysed enantioselective Mukaiyama-aldol reaction with difluorinated silyl enol ethers and acylpyridine N-oxides. Org Biomol Chem 2023; 21:345-350. [PMID: 36484719 DOI: 10.1039/d2ob01763f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
A Cu(II)/BOX complex catalyses the enantioselective addition of difluorinated silyl enol ethers to acylpyridine N-oxides. The reaction provides difluorinated chiral tertiary alcohols of great interest in medicinal chemistry. These compounds are obtained in moderate to excellent yields and with high enantioselectivities. The stereochemical outcome of the reaction has been explained by DFT calculations.
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Affiliation(s)
- Amparo Sanz-Marco
- Departament de Química Orgànica-Facultat de Química, Universitat de València, C/Dr. Moliner 50, 46100-Burjassot, València, Spain.
| | - Daniel Esperilla
- Departament de Química Orgànica-Facultat de Química, Universitat de València, C/Dr. Moliner 50, 46100-Burjassot, València, Spain.
| | - Marc Montesinos-Magraner
- Departament de Química Orgànica-Facultat de Química, Universitat de València, C/Dr. Moliner 50, 46100-Burjassot, València, Spain.
| | - Carlos Vila
- Departament de Química Orgànica-Facultat de Química, Universitat de València, C/Dr. Moliner 50, 46100-Burjassot, València, Spain.
| | - M Carmen Muñoz
- Departament de Física Aplicada, Universitat Politècnica de València, C/Cami de Vera s/n, 46022-València, Spain
| | - José R Pedro
- Departament de Química Orgànica-Facultat de Química, Universitat de València, C/Dr. Moliner 50, 46100-Burjassot, València, Spain.
| | - Gonzalo Blay
- Departament de Química Orgànica-Facultat de Química, Universitat de València, C/Dr. Moliner 50, 46100-Burjassot, València, Spain.
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5
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Xu RF, Liao FM, Cai Y, Liu JB. Copper-catalyzed aryl selenylation of 2-bromodifluoromethylbenzo-1,3-thi(x)azoles with diaryl diselenides. Tetrahedron 2022. [DOI: 10.1016/j.tet.2022.133118] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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6
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Smonou I, Giannopoulos V, Katsoulakis N. Dichlorination of β-Keto Esters and 1,3-Diketones Mediated by Oxone/Aluminum Trichloride Mixture in Aqueous Medium. SYNTHESIS-STUTTGART 2022. [DOI: 10.1055/s-0041-1737412] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
AbstractA new method for the α,α-dichlorination of β-keto esters using Oxone/aluminum trichloride mixture in aqueous medium has been developed. This useful process has also been applied successfully for the dichlorination of 1,3-diketones. The dichlorinated compounds have been produced in one step, high yields, and short reaction times.
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7
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Gui J, Sun M, Wu H, Li J, Yang J, Wang Z. Direct benzylic C–H difluoroalkylation with difluoroenoxysilanes by transition metal-free photoredox catalysis. Org Chem Front 2022. [DOI: 10.1039/d2qo00857b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A visible light promoted direct benzylic C–H difluoroalkylation with difluoroenoxysilanes catalyzed by Na2-eosin Y via a HAT-ORPC pathway has been developed, providing an efficient and atom-economic method for production of α-benzyl-α,α-difluoroketones.
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Affiliation(s)
- Jing Gui
- Department of Chemistry, Zhejiang Sci-Tech University, Hangzhou, 310018, Zhejiang, China
- Advanced Research Institute and Department of Chemistry, Taizhou University, Jiaojiang, 318000, Zhejiang, China
| | - Manman Sun
- Advanced Research Institute and Department of Chemistry, Taizhou University, Jiaojiang, 318000, Zhejiang, China
| | - Haijian Wu
- Advanced Research Institute and Department of Chemistry, Taizhou University, Jiaojiang, 318000, Zhejiang, China
| | - Jinshan Li
- Advanced Research Institute and Department of Chemistry, Taizhou University, Jiaojiang, 318000, Zhejiang, China
| | - Jianguo Yang
- Department of Chemistry, Zhejiang Sci-Tech University, Hangzhou, 310018, Zhejiang, China
- Advanced Research Institute and Department of Chemistry, Taizhou University, Jiaojiang, 318000, Zhejiang, China
| | - Zhiming Wang
- Department of Chemistry, Zhejiang Sci-Tech University, Hangzhou, 310018, Zhejiang, China
- Advanced Research Institute and Department of Chemistry, Taizhou University, Jiaojiang, 318000, Zhejiang, China
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8
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Hammouda MM, Elattar KM. Recent progress in the chemistry of β-aminoketones. RSC Adv 2022; 12:24681-24712. [PMID: 36128366 PMCID: PMC9428906 DOI: 10.1039/d2ra03864a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2022] [Accepted: 08/17/2022] [Indexed: 11/21/2022] Open
Abstract
The current study highlighted the significance of β-aminoketones as privileged biologically active molecules, recent synthetic strategies, and synthetic applications.
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Affiliation(s)
- Mohamed M. Hammouda
- Department of Chemistry, College of Science and Humanities in Al-Kharj, Prince Sattam Bin Abdulaziz University, Al-Kharj, 11942, Saudi Arabia
- Chemistry Department, Faculty of Science, Mansoura University, El-Gomhoria Street, Mansoura, 35516, Egypt
| | - Khaled M. Elattar
- Unit of Genetic Engineering and Biotechnology, Faculty of Science, Mansoura University, El-Gomhoria Street, Mansoura, 35516, Egypt
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9
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Zhang M, Li H, Zhao J, Li Y, Zhang Q. Copper-catalyzed [3 + 1] cyclization of cyclopropenes/diazo compounds and bromodifluoroacetamides: facile synthesis of α,α-difluoro-β-lactam derivatives. Chem Sci 2021; 12:11805-11809. [PMID: 34659719 PMCID: PMC8442724 DOI: 10.1039/d1sc02930d] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2021] [Accepted: 07/29/2021] [Indexed: 01/10/2023] Open
Abstract
We have developed a novel copper-catalyzed cyclization of cyclopropenes/diazo compounds and bromodifluoroacetamides, efficiently synthesizing a series of α,α-difluoro-β-lactams in moderate to excellent yields under mild reaction conditions. This reaction represents the first example of [3 + 1] cyclization for the synthesis of β-lactams utilizing a metal carbene intermediate as the C1 synthon. A copper-catalyzed [3 + 1] cyclization of cyclopropenes and bromodifluoroacetamides/diazo compounds has been successfully developed, efficiently synthesizing a wide range of α,α-difluoro-β-lactams.![]()
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Affiliation(s)
- Mengru Zhang
- Department of Chemistry, Jilin Province Key Laboratory of Organic Functional Molecular Design & Synthesis, Northeast Normal University Changchun 130024 China
| | - Hexin Li
- Department of Chemistry, Jilin Province Key Laboratory of Organic Functional Molecular Design & Synthesis, Northeast Normal University Changchun 130024 China
| | - Jinbo Zhao
- Department of Chemistry, Jilin Province Key Laboratory of Organic Functional Molecular Design & Synthesis, Northeast Normal University Changchun 130024 China .,Department of Chemistry, Jilin Provincial Key Laboratory of Carbon Fiber Development and Application, College of Chemistry and Life Science, Changchun University of Technology Changchun 130012 China
| | - Yan Li
- Department of Chemistry, Jilin Province Key Laboratory of Organic Functional Molecular Design & Synthesis, Northeast Normal University Changchun 130024 China
| | - Qian Zhang
- Department of Chemistry, Jilin Province Key Laboratory of Organic Functional Molecular Design & Synthesis, Northeast Normal University Changchun 130024 China .,State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences 345 Lingling Lu Shanghai 200032 China
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10
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Pan J, Li H, Wu J, Wu F. Cobalt Catalyzed Addition of α, α-Difluoroiodomethyl Ketones to Alkenes/ Alkynes. J Organomet Chem 2021. [DOI: 10.1016/j.jorganchem.2021.121818] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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11
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He JX, Zhang ZH, Mu BS, Cui XY, Zhou J, Yu JS. Catalyst-Free and Solvent-Controlled Divergent Synthesis of Difluoromethylene-Containing S-Heterocycles. J Org Chem 2021; 86:9206-9217. [DOI: 10.1021/acs.joc.1c00754] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Jun-Xiong He
- Shanghai Engineering Research Center of Molecular Therapeutics and New Drug Development and Shanghai Key Laboratory of Green Chemistry and Chemical Processes, East China Normal University, Shanghai 200062, P. R. China
| | - Zhi-Hao Zhang
- Shanghai Engineering Research Center of Molecular Therapeutics and New Drug Development and Shanghai Key Laboratory of Green Chemistry and Chemical Processes, East China Normal University, Shanghai 200062, P. R. China
| | - Bo-Shuai Mu
- Shanghai Engineering Research Center of Molecular Therapeutics and New Drug Development and Shanghai Key Laboratory of Green Chemistry and Chemical Processes, East China Normal University, Shanghai 200062, P. R. China
| | - Xiao-Yuan Cui
- Shanghai Engineering Research Center of Molecular Therapeutics and New Drug Development and Shanghai Key Laboratory of Green Chemistry and Chemical Processes, East China Normal University, Shanghai 200062, P. R. China
| | - Jian Zhou
- Shanghai Engineering Research Center of Molecular Therapeutics and New Drug Development and Shanghai Key Laboratory of Green Chemistry and Chemical Processes, East China Normal University, Shanghai 200062, P. R. China
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Shanghai 200032, P. R. China
| | - Jin-Sheng Yu
- Shanghai Engineering Research Center of Molecular Therapeutics and New Drug Development and Shanghai Key Laboratory of Green Chemistry and Chemical Processes, East China Normal University, Shanghai 200062, P. R. China
- Key Laboratory of Tropical Medicinal Resource Chemistry of Ministry of Education, Hainan Normal University, Haikou 571158, P. R. China
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12
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Affiliation(s)
- Manfred Braun
- Institute of Organic and Macromolecular Chemistry Heinrich-Heine-University Düsseldorf Universitätsstr. 1 40225 Düsseldorf Germany
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13
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Gao F, Li B, Wang Y, Chen Q, Li Y, Wang K, Yan W. Stereoselective synthetic strategies of stereogenic carbon centers featuring a difluoromethyl group. Org Chem Front 2021. [DOI: 10.1039/d1qo00032b] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
The scope of this review is to summarize routine asymmetric synthetic methods which enable the effective and selective introduction of difluoromethyl groups into the desired compounds, providing a general introduction to this important research area.
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Affiliation(s)
- Fengyun Gao
- The Institute of Pharmacology
- Key Laboratory of Preclinical Study for New Drugs of Gansu Province
- School of Basic Medical Sciences
- Lanzhou University
- Lanzhou 730000
| | - Boyu Li
- Department of Chemistry
- University of Liverpool
- Liverpool L69 7ZD
- UK
| | - Yalan Wang
- The Institute of Pharmacology
- Key Laboratory of Preclinical Study for New Drugs of Gansu Province
- School of Basic Medical Sciences
- Lanzhou University
- Lanzhou 730000
| | - Qushuo Chen
- The Institute of Pharmacology
- Key Laboratory of Preclinical Study for New Drugs of Gansu Province
- School of Basic Medical Sciences
- Lanzhou University
- Lanzhou 730000
| | - Yongzhen Li
- The Institute of Pharmacology
- Key Laboratory of Preclinical Study for New Drugs of Gansu Province
- School of Basic Medical Sciences
- Lanzhou University
- Lanzhou 730000
| | - Kairong Wang
- The Institute of Pharmacology
- Key Laboratory of Preclinical Study for New Drugs of Gansu Province
- School of Basic Medical Sciences
- Lanzhou University
- Lanzhou 730000
| | - Wenjin Yan
- The Institute of Pharmacology
- Key Laboratory of Preclinical Study for New Drugs of Gansu Province
- School of Basic Medical Sciences
- Lanzhou University
- Lanzhou 730000
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14
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Zhang X, Gao Y, Hu X, Ji C, Liu Y, Yu J. Recent Advances in Catalytic Enantioselective Synthesis of Fluorinated α‐ and β‐Amino Acids. Adv Synth Catal 2020. [DOI: 10.1002/adsc.202000966] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Xue‐Xin Zhang
- Shanghai Engineering Research Center of Molecular Therapeutics and New Drug Development School of Chemistry and Molecular Engineering East China Normal University Shanghai 200062 People's Republic of China
| | - Yang Gao
- Shanghai Engineering Research Center of Molecular Therapeutics and New Drug Development School of Chemistry and Molecular Engineering East China Normal University Shanghai 200062 People's Republic of China
| | - Xiao‐Si Hu
- Shanghai Engineering Research Center of Molecular Therapeutics and New Drug Development School of Chemistry and Molecular Engineering East China Normal University Shanghai 200062 People's Republic of China
| | - Cong‐Bin Ji
- School of Chemistry and Environmental Sciences Shangrao Normal University Jiangxi 334001 People's Republic of China
| | - Yun‐Lin Liu
- School of Chemistry and Chemical Engineering Guangzhou University Guangzhou 510006 People's Republic of China
| | - Jin‐Sheng Yu
- Shanghai Engineering Research Center of Molecular Therapeutics and New Drug Development School of Chemistry and Molecular Engineering East China Normal University Shanghai 200062 People's Republic of China
- Key Laboratory of Tropical Medicinal Resource Chemistry of Ministry of Education Hainan Normal University Haikou 571158 People's Republic of China
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15
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Sadhukhan S, Santhi J, Baire B. The α,α‐Dihalocarbonyl Building Blocks: An Avenue for New Reaction Development in Organic Synthesis. Chemistry 2020; 26:7145-7175. [DOI: 10.1002/chem.201905475] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2019] [Revised: 01/08/2020] [Indexed: 01/04/2023]
Affiliation(s)
- Santu Sadhukhan
- Department of ChemistryIndian Institute of Technology Madras Chennai 600036 India
| | - Jampani Santhi
- Department of ChemistryIndian Institute of Technology Madras Chennai 600036 India
| | - Beeraiah Baire
- Department of ChemistryIndian Institute of Technology Madras Chennai 600036 India
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16
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Wang X, Lei J, Li G, Meng J, Li C, Li J, Sun K. Synthetic methods for compounds containing fluoro-lactam units. Org Biomol Chem 2020; 18:9762-9774. [DOI: 10.1039/d0ob02168g] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
This review highlights recent progress in the construction of fluorinated lactams, including fluoro-β-lactams, fluoro-γ-lactams, and fluoro-δ-lactams, with an emphasis on the scopes, limitations and mechanisms of these different reactions.
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Affiliation(s)
- Xin Wang
- School of Chemistry and Chemical Engineering
- YanTai University
- Yantai
- P. R. China
| | - Jia Lei
- School of Pharmacy
- Harbin University of Commerce
- Harbin
- P. R. China
| | - Guofeng Li
- School of Chemistry and Chemical Engineering
- Henan Normal University
- Xinxiang
- P. R. China
| | - Jianping Meng
- School of Pharmacy
- Harbin University of Commerce
- Harbin
- P. R. China
| | - Chen Li
- School of Pharmacy
- Harbin University of Commerce
- Harbin
- P. R. China
| | - Jiazhu Li
- School of Chemistry and Chemical Engineering
- YanTai University
- Yantai
- P. R. China
| | - Kai Sun
- School of Chemistry and Chemical Engineering
- YanTai University
- Yantai
- P. R. China
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17
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Zhang T, Pan J, Duan J, Wu J, Zhang W, Wu F. Radical Difunctionalization of Alkenes with Iododifluoromethyl Ketones Under Ni‐Catalysis. ChemCatChem 2019. [DOI: 10.1002/cctc.201901395] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Affiliation(s)
- Tianyu Zhang
- School of Chemical and Environmental EngineeringShanghai Institute of Technology Shanghai 201418 P. R. China
| | - Jun Pan
- School of Chemical and Environmental EngineeringShanghai Institute of Technology Shanghai 201418 P. R. China
| | - Jin Duan
- School of Chemical and Environmental EngineeringShanghai Institute of Technology Shanghai 201418 P. R. China
| | - Jingjing Wu
- School of Chemical and Environmental EngineeringShanghai Institute of Technology Shanghai 201418 P. R. China
| | - Wei Zhang
- Department of ChemistryUniversity of Massachusetts Boston Boston MA 02125 USA
| | - Fanhong Wu
- School of Chemical and Environmental EngineeringShanghai Institute of Technology Shanghai 201418 P. R. China
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18
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Ghosh A, Hegde R, Makane VB, Sridhar B, Rode HB, Patil SA, Dateer RB. Transition metal-free functionalized hydration of alkynes: one-pot synthesis of fluorinated β-keto-imidates using Selectfluor. Org Biomol Chem 2019; 17:4440-4445. [PMID: 30984956 DOI: 10.1039/c9ob00527g] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
A transition metal-free, four-component one-pot synthesis of polyfunctionalized fluorinated β-keto-imidates via the functionalized hydration of alkynes has been described. The intermediate 1,3-ketoamino moiety was obtained from easily accessible arylpropioladehyde and arlyhydroxylamine and was treated with Selectfluor delivering fluorinated β-keto-imidates. A wide variety of functional groups are tolerated under mild reaction conditions and the product applicability is highlighted.
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Affiliation(s)
- Arnab Ghosh
- Centre for Nano and Material Sciences, Jain Global Campus, JAIN (Deemed-to-be-University), Bangalore, Karnataka 562112, India.
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19
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Zhang R, Zhang Z, Zhou Q, Yu L, Wang J. The Generation of Difluoroketenimine and Its Application in the Synthesis of α,α‐Difluoro‐β‐amino Amides. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201901591] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Rui Zhang
- Beijing National Laboratory of Molecular Sciences (BNLMS) and Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of EducationCollege of ChemistryPeking University Beijing 100871 China
| | - Zhikun Zhang
- Beijing National Laboratory of Molecular Sciences (BNLMS) and Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of EducationCollege of ChemistryPeking University Beijing 100871 China
| | - Qi Zhou
- Beijing National Laboratory of Molecular Sciences (BNLMS) and Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of EducationCollege of ChemistryPeking University Beijing 100871 China
| | - Lefei Yu
- Beijing National Laboratory of Molecular Sciences (BNLMS) and Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of EducationCollege of ChemistryPeking University Beijing 100871 China
| | - Jianbo Wang
- Beijing National Laboratory of Molecular Sciences (BNLMS) and Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of EducationCollege of ChemistryPeking University Beijing 100871 China
- The State Key Laboratory of Organometallic ChemistryShanghai Institute of Organic ChemistryChinese Academy of Sciences 354 Fenglin Lu Shanghai 200032 China
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20
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Zhang R, Zhang Z, Zhou Q, Yu L, Wang J. The Generation of Difluoroketenimine and Its Application in the Synthesis of α,α‐Difluoro‐β‐amino Amides. Angew Chem Int Ed Engl 2019; 58:5744-5748. [DOI: 10.1002/anie.201901591] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2019] [Indexed: 12/25/2022]
Affiliation(s)
- Rui Zhang
- Beijing National Laboratory of Molecular Sciences (BNLMS) and Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of EducationCollege of ChemistryPeking University Beijing 100871 China
| | - Zhikun Zhang
- Beijing National Laboratory of Molecular Sciences (BNLMS) and Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of EducationCollege of ChemistryPeking University Beijing 100871 China
| | - Qi Zhou
- Beijing National Laboratory of Molecular Sciences (BNLMS) and Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of EducationCollege of ChemistryPeking University Beijing 100871 China
| | - Lefei Yu
- Beijing National Laboratory of Molecular Sciences (BNLMS) and Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of EducationCollege of ChemistryPeking University Beijing 100871 China
| | - Jianbo Wang
- Beijing National Laboratory of Molecular Sciences (BNLMS) and Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of EducationCollege of ChemistryPeking University Beijing 100871 China
- The State Key Laboratory of Organometallic ChemistryShanghai Institute of Organic ChemistryChinese Academy of Sciences 354 Fenglin Lu Shanghai 200032 China
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21
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Internally reuse by-product as promoter: A catalyst-free imine formation/Mukaiyama-Mannich sequence of α-amido sulfones with fluorinated silyl enol ethers. J Fluor Chem 2019. [DOI: 10.1016/j.jfluchem.2019.01.003] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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22
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Hu XS, Ding PG, Yu JS, Zhou J. A Sc(OTf)3 catalyzed Mukaiyama–Mannich reaction of difluoroenoxysilanes with unactivated ketimines. Org Chem Front 2019. [DOI: 10.1039/c9qo00577c] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
The first example of a Mukaiyama–Mannich reaction of difluoroenoxysilanes with unactivated ketimines catalyzed by Sc(OTf)3 is described.
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Affiliation(s)
- Xiao-Si Hu
- Shanghai Engineering Research Center of Molecular Therapeutics and New Drug Development
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes
- East China Normal University
- Shanghai 200062
- China
| | - Pei-Gang Ding
- Shanghai Engineering Research Center of Molecular Therapeutics and New Drug Development
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes
- East China Normal University
- Shanghai 200062
- China
| | - Jin-Sheng Yu
- Shanghai Engineering Research Center of Molecular Therapeutics and New Drug Development
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes
- East China Normal University
- Shanghai 200062
- China
| | - Jian Zhou
- Shanghai Engineering Research Center of Molecular Therapeutics and New Drug Development
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes
- East China Normal University
- Shanghai 200062
- China
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Hu XS, Yu JS, Zhou J. Catalytic selective mono- and difluoroalkylation using fluorinated silyl enol ethers. Chem Commun (Camb) 2019; 55:13638-13648. [DOI: 10.1039/c9cc07677h] [Citation(s) in RCA: 53] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
This feature article highlights our recent achievements in catalytic selective mono- and difluoroalkylation using fluorinated silyl enol ethers (FSEEs).
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Affiliation(s)
- Xiao-Si Hu
- Shanghai Engineering Research Center of Molecular Therapeutics and New Drug Development
- East China Normal University
- Shanghai 200062
- P. R. China
| | - Jin-Sheng Yu
- Shanghai Engineering Research Center of Molecular Therapeutics and New Drug Development
- East China Normal University
- Shanghai 200062
- P. R. China
| | - Jian Zhou
- Shanghai Engineering Research Center of Molecular Therapeutics and New Drug Development
- East China Normal University
- Shanghai 200062
- P. R. China
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes
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24
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Hao YJ, Hu XS, Yu JS, Zhou F, Zhou Y, Zhou J. An efficient Fe(III)-catalyzed 1,6-conjugate addition of para-quinone methides with fluorinated silyl enol ethers toward β,β-diaryl α-fluorinated ketones. Tetrahedron 2018. [DOI: 10.1016/j.tet.2018.11.017] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
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25
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Cobalt-catalyzed difluoroalkylation of tertiary aryl ketones for facile synthesis of quaternary alkyl difluorides. Nat Commun 2018; 9:4951. [PMID: 30470757 PMCID: PMC6251884 DOI: 10.1038/s41467-018-07525-y] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2018] [Accepted: 11/08/2018] [Indexed: 11/08/2022] Open
Abstract
The selective incorporation of gem-difluoroalkyl groups into biologically active molecules has long been used as an efficient strategy for drug design and discovery. However, the catalytic C(sp3)-CF2 bond-forming cross-coupling reaction for selective incorporation of difluoromethylene group into diverse alkyl chains, especially more sterically demanding secondary and tertiary functionalized alkanes, still remains as a major challenge. Herein, we describe a cobalt-catalyzed difluoroalkylation of tertiary aryl ketones for facile synthesis of quaternary alkyl difluorides, which exhibited high efficiency, broad scope and mild conditions. The synthetic utility of this method is demonstrated by late-stage difluoroalkylation of donepezil, a well-known acetylcholinesterase inhibitor used to treat the Alzheimer's disease. Preliminary mechanistic investigations indicate that a difluoroalkyl radical is involved in a Co(I)/Co(III) catalytic cycle. This cobalt-catalyzed fluoroalkylation thus offers insights into an efficient way for the synthesis of fluoroalkylated bioactive molecules for drug discovery.
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26
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Therapeutic efficacy of lipid emulsions of docetaxel-linoleic acid conjugate in breast cancer. Int J Pharm 2018; 546:61-69. [DOI: 10.1016/j.ijpharm.2018.05.032] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2018] [Revised: 04/26/2018] [Accepted: 05/12/2018] [Indexed: 02/01/2023]
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27
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Yang X, Cao ZH, Zhou Y, Cheng F, Lin ZW, Ou Z, Yuan Y, Huang YY. Petasis-Type gem-Difluoroallylation Reactions Assisted by the Neighboring Hydroxyl Group in Amines. Org Lett 2018; 20:2585-2589. [DOI: 10.1021/acs.orglett.8b00721] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Xing Yang
- Department of Chemistry, School of Chemistry, Chemical Engineering and Life Science, Wuhan University of Technology, Wuhan 430070, P.R. China
| | - Ze-Hun Cao
- Department of Chemistry, School of Chemistry, Chemical Engineering and Life Science, Wuhan University of Technology, Wuhan 430070, P.R. China
| | - Yang Zhou
- Department of Chemistry, School of Chemistry, Chemical Engineering and Life Science, Wuhan University of Technology, Wuhan 430070, P.R. China
| | - Feng Cheng
- Department of Chemistry, School of Chemistry, Chemical Engineering and Life Science, Wuhan University of Technology, Wuhan 430070, P.R. China
| | - Zi-Wei Lin
- Department of Chemistry, School of Chemistry, Chemical Engineering and Life Science, Wuhan University of Technology, Wuhan 430070, P.R. China
| | - Zhi Ou
- Department of Chemistry, School of Chemistry, Chemical Engineering and Life Science, Wuhan University of Technology, Wuhan 430070, P.R. China
| | - Ye Yuan
- Department of Chemistry, School of Chemistry, Chemical Engineering and Life Science, Wuhan University of Technology, Wuhan 430070, P.R. China
| | - Yi-Yong Huang
- Department of Chemistry, School of Chemistry, Chemical Engineering and Life Science, Wuhan University of Technology, Wuhan 430070, P.R. China
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28
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Nguyen AL, Khatri HR, Woods JR, Baldwin CS, Fronczek FR, Colby DA. Magnesium-Promoted Additions of Difluoroenolates to Unactivated Imines. J Org Chem 2018; 83:3109-3118. [PMID: 29446944 DOI: 10.1021/acs.joc.7b03014] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Although there are many synthetic methods to produce fluorinated and trifluoromethylated organic structures, the construction of difluoromethylated compounds remains a synthetic challenge. We have discovered that unactivated imines will react with difluoroenolates under exceedingly mild conditions when using magnesium salts and organic bases. We have applied this approach to the iminoaldol reaction to produce difluoromethylene groups as α,α-difluoro-β-amino-carbonyl groups. This method provides synthetically useful quantities of difficult to access α,α-difluoro-β-aminoketones without the need of protecting groups or the use of activated imines. Moreover, we have applied this strategy to create analogues of the dual orexin receptor antagonist, almorexant, in only two synthetic steps.
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Affiliation(s)
- Alex L Nguyen
- Department of BioMolecular Sciences , University of Mississippi , University , Mississippi 38677 , United States
| | - Hari R Khatri
- Department of BioMolecular Sciences , University of Mississippi , University , Mississippi 38677 , United States
| | - James R Woods
- Department of Medicinal Chemistry and Molecular Pharmacology , Purdue University , West Lafayette , Indiana 47907 , United States
| | - Cassidy S Baldwin
- Department of BioMolecular Sciences , University of Mississippi , University , Mississippi 38677 , United States
| | - Frank R Fronczek
- Department of Chemistry , Louisiana State University , Baton Rouge , Louisiana 70803 , United States
| | - David A Colby
- Department of BioMolecular Sciences , University of Mississippi , University , Mississippi 38677 , United States
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29
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Yang X, Zhang F, Zhou Y, Huang YY. Neighboring phenolic group-activated gem-difluoroallylboration of imines for the catalyst-free synthesis of gem-difluorohomoallylamines. Org Biomol Chem 2018; 16:3367-3371. [DOI: 10.1039/c8ob00541a] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
An unprecedented imine allylation with pinacol gem-difluoroallylborates for the synthesis of a wide range of racemic gem-difluorohomoallylamine derivatives under catalyst-free conditions was enabled by a neighboring phenolic group in an N-protecting group.
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Affiliation(s)
- Xing Yang
- Department of Chemistry
- School of Chemistry
- Chemical Engineering and Life Science
- Wuhan University of Technology
- Wuhan 430070
| | - Feng Zhang
- College of Science
- Hunan Agricultural University
- Changsha 410128
- P. R. China
| | - Yang Zhou
- Department of Chemistry
- School of Chemistry
- Chemical Engineering and Life Science
- Wuhan University of Technology
- Wuhan 430070
| | - Yi-Yong Huang
- Department of Chemistry
- School of Chemistry
- Chemical Engineering and Life Science
- Wuhan University of Technology
- Wuhan 430070
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30
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A general and efficient Lewis acid catalysed Mukaiyama-aldol reaction of difluoroenoxysilanes and ketones. Sci Bull (Beijing) 2017; 62:1504-1509. [PMID: 36659427 DOI: 10.1016/j.scib.2017.10.016] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2017] [Revised: 09/30/2017] [Accepted: 10/09/2017] [Indexed: 01/21/2023]
Abstract
We report a general and highly efficient Mukaiyama-aldol reaction of ketones and difluoroenoxysilanes. While the reaction of aryl ketones worked efficiently in the presence of Bi(OTf)3, that of aliphatic ketones required the use of Sc(OTf)3. In addition, Sc(OTf)3 was capable of achieving excellent 1,2-selectivity in the corresponding reaction of α,β-unsaturated ketones. This method provides a facile access to differently substituted β-hydroxy α,α-difluoro ketones, versatile synthons for difluomethylated tertiary alcohols.
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31
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Wu YB, Wan L, Lu GP, Cai C. “All-Water” Synthesis of β-Amino α,α-Difluoro Ketones from Fluorinated Enol Silyl Ethers and Imines. European J Org Chem 2017. [DOI: 10.1002/ejoc.201700591] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Ye-bin Wu
- Chemical Engineering College; Nanjing University of Science and Technology; 200 Xiao Ling Wei Street Nanjing Jiangsu People's Republic of China
| | - Li Wan
- Biotechnology and Pharmaceutical Engineering College; Nanjing Tech University; 211816 Nanjing People's Republic of China
| | - Guo-ping Lu
- Chemical Engineering College; Nanjing University of Science and Technology; 200 Xiao Ling Wei Street Nanjing Jiangsu People's Republic of China
| | - Chun Cai
- Chemical Engineering College; Nanjing University of Science and Technology; 200 Xiao Ling Wei Street Nanjing Jiangsu People's Republic of China
- Key Laboratory of Organofluorine Chemistry; Shanghai Institute of Organic Chemistry; Chinese Academy of Sciences; 345 Lingling Lu 20032 Shanghai People's Republic of China
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32
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Markova MV, Sobenina LN, Ushakov IA, Ivanov AV, Trofimov BA. Aminomethylation of substituted pyrroles and 4,5,6,7-tetrahydroindoles with biogenic cyclic amines. RUSSIAN JOURNAL OF ORGANIC CHEMISTRY 2017. [DOI: 10.1134/s1070428017020075] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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33
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Nagode SB, Chaturvedi AK, Rastogi N. Visible‐light‐catalyzed Tandem Difluoroacetylation–Intramolecular Cyclization of 1,3‐Diarylpropynones: Access to Difluoroacetylated Indenones. ASIAN J ORG CHEM 2017. [DOI: 10.1002/ajoc.201600549] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Savita B. Nagode
- Medicinal & Process Chemistry DivisionCSIR-Central Drug Research Institute, B.S. 10/1, Sector 10, Jankipuram extension Sitapur Road Lucknow 226031 India
- Academy of Scientific and Innovative Research New Delhi 110001 India
| | - Atul Kumar Chaturvedi
- Medicinal & Process Chemistry DivisionCSIR-Central Drug Research Institute, B.S. 10/1, Sector 10, Jankipuram extension Sitapur Road Lucknow 226031 India
- Academy of Scientific and Innovative Research New Delhi 110001 India
| | - Namrata Rastogi
- Medicinal & Process Chemistry DivisionCSIR-Central Drug Research Institute, B.S. 10/1, Sector 10, Jankipuram extension Sitapur Road Lucknow 226031 India
- Academy of Scientific and Innovative Research New Delhi 110001 India
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34
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Chen T, Cai C. An efficient approach to 3-oxoisoindoline-1-difluoroalkyl derivatives via a metal triflate-catalyzed Mannich/lactamization cascade reaction. NEW J CHEM 2017. [DOI: 10.1039/c6nj03813a] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An efficient approach for the synthesis of N-substituted 3-oxoisoindoline-1-difluoroalkyl derivatives via a one-pot cascade reaction has been developed.
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Affiliation(s)
- Tingting Chen
- College of Chemical Engineering
- Nanjing University of Science & Technology
- Nanjing
- China
| | - Chun Cai
- College of Chemical Engineering
- Nanjing University of Science & Technology
- Nanjing
- China
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35
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Yu JS, Zhou J. Organocatalytic enantioselective Mukaiyama–Mannich reaction of fluorinated enol silyl ethers and cyclic N-sulfonyl ketimines. Org Chem Front 2016. [DOI: 10.1039/c5qo00407a] [Citation(s) in RCA: 57] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The first catalytic asymmetric Mukaiyama–Mannich reaction of fluorinated silyl enol ethers and ketimines is developed, allowing highly enantioselective synthesis of benzosultam based β-fluorinated Cα-tetrasubstituted α-amino acid derivatives.
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Affiliation(s)
- Jin-Sheng Yu
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes
- School of Chemistry and Molecular Engineering
- East China Normal University
- Shanghai 200062
- China
| | - Jian Zhou
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes
- School of Chemistry and Molecular Engineering
- East China Normal University
- Shanghai 200062
- China
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36
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Cao CR, Jiang M, Liu JT. Metal-Mediated Reformatsky Reaction of Bromodifluoromethyl Ketone and Imine. European J Org Chem 2015. [DOI: 10.1002/ejoc.201403424] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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37
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Yu JS, Zhou J. A highly efficient Mukaiyama–Mannich reaction of N-Boc isatin ketimines and other active cyclic ketimines using difluoroenol silyl ethers catalyzed by Ph3PAuOTf. Org Biomol Chem 2015; 13:10968-72. [DOI: 10.1039/c5ob01895a] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A Ph3PAuOTf catalyzed highly efficient reaction of difluoroenoxysilanes and active ketimines is reported, which represents the first Au(i)-catalyzed Mukaiyama–Mannich reaction.
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Affiliation(s)
- Jin-Sheng Yu
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes
- School of Chemistry and Molecular Engineering
- East China Normal University
- Shanghai 200062
- China
| | - Jian Zhou
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes
- School of Chemistry and Molecular Engineering
- East China Normal University
- Shanghai 200062
- China
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38
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Jones JH, Appayee C, Brenner-Moyer SE. One-Pot Preparation of Enantiopure Fluorinated β-Amino Acid Precursors. European J Org Chem 2014. [DOI: 10.1002/ejoc.201402369] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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39
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March TL, Freemont JA, Dumsday G, Johnston MR, Duggan PJ. The Synthesis of Enantiopure α-Fluoro and α,α-Difluoro-β3-Arginine Derivatives. Aust J Chem 2014. [DOI: 10.1071/ch13590] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
The synthesis of a set of monofluorinated, difluorinated, and non-fluorinated N-acetylated-β3-arginine esters, potential inhibitors of trypsin-like proteases, is described. Elaboration to the target compounds from previously reported enantiopure precursors derived from 3-hydroxypropanal involved 6–7 steps and was achieved in 48–65 % overall yield. The α,α-difluoro-β3-arginine derivative was found to be particularly prone to hydrolysis. Three β3-arginine derivatives were tested for their ability to inhibit trypsin, the α,α-difluoro compound being assayed in the form of a carboxylate zwitterion.
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40
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Tarui A, Ikebata T, Sato K, Omote M, Ando A. Enantioselective synthesis of α,α-difluoro-β-lactams using amino alcohol ligands. Org Biomol Chem 2014; 12:6484-9. [DOI: 10.1039/c4ob01184h] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
A practical and highly enantioselective Reformatsky reaction of ethyl bromodifluoroacetate with imines using a cheap and commercially available amino alcohol ligand is described.
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Affiliation(s)
- Atsushi Tarui
- Faculty of Pharmaceutical Sciences
- Setsunan University
- Hirakata, Japan
| | - Takeshi Ikebata
- Faculty of Pharmaceutical Sciences
- Setsunan University
- Hirakata, Japan
| | - Kazuyuki Sato
- Faculty of Pharmaceutical Sciences
- Setsunan University
- Hirakata, Japan
| | - Masaaki Omote
- Faculty of Pharmaceutical Sciences
- Setsunan University
- Hirakata, Japan
| | - Akira Ando
- Faculty of Pharmaceutical Sciences
- Setsunan University
- Hirakata, Japan
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41
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42
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Orbegozo T, Burel F, Jubault P, Pannecoucke X. 3,3-gem-Difluorinated-β-lactams: synthesis pathways and applications. Tetrahedron 2013. [DOI: 10.1016/j.tet.2013.02.043] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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43
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Liu YL, Yu JS, Zhou J. Catalytic Asymmetric Construction of Stereogenic Carbon Centers that Feature agem-Difluoroalkyl Group. ASIAN J ORG CHEM 2013. [DOI: 10.1002/ajoc.201200131] [Citation(s) in RCA: 83] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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44
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Lourie LF, Serguchev YA, Ponomarenko MV, Rusanov EB, Vovk MV, Ignat'ev NV. Electrophilic fluorocyclization of unsaturated alcohols in ionic liquids. Tetrahedron 2013. [DOI: 10.1016/j.tet.2012.10.094] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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45
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March TL, Johnston MR, Duggan PJ, Gardiner J. Synthesis, Structure, and Biological Applications ofα-Fluorinatedβ-Amino Acids and Derivatives. Chem Biodivers 2012; 9:2410-41. [DOI: 10.1002/cbdv.201200307] [Citation(s) in RCA: 54] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2012] [Indexed: 01/30/2023]
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46
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Zhang P, Wang C, Zhou L, Sun J. Formation of Chiralα-Monofluorinated-β-amino Esters through Organocatalytic Asymmetric Reduction ofα-Fluoro-β-enamino Esters by Trichlorosilane. CHINESE J CHEM 2012. [DOI: 10.1002/cjoc.201201067] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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47
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Davies SG, Fletcher AM, Lv L, Roberts PM, Thomson JE. Asymmetric synthesis of (−)-(R)-sitagliptin. Tetrahedron Lett 2012. [DOI: 10.1016/j.tetlet.2012.04.025] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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48
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Practical synthesis of fluorine-containing α- and β-amino acids: recipes from Kiev, Ukraine. Future Med Chem 2011; 1:793-819. [PMID: 21426081 DOI: 10.4155/fmc.09.70] [Citation(s) in RCA: 105] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
Naturally occurring compounds containing a C-F bond are extremely rare; only a handful of fluorine-containing carboxylic acids have been described so far. By contrast, man-made fluorine-containing derivatives of all major classes of biologically important compounds are extremely promising medicinal targets used in the elucidation of biochemical, metabolic transformations and the development of new pharmaceuticals. Among the fluorine-containing derivatives of natural products, fluorinated analogs of amino acids are of particular interest and medicinal potential. This article presents a concise review of various synthetic methods, developed by the Kiev's school of bioorganic chemistry, for the preparation of fluorine-containing analogs of α- and β-amino acids, α-hydroxy acids, amines, as well as their phosphorus and sulfur-derived compounds, in enantiomerically pure form. One of the major methodological goals of the study was practicality, which is understood by us as stereochemical generality, operational convenience and synthetic affordance for each reaction step and isolation of the target products. The synthetic methods developed by our group can be roughly divided in two general categories: fluorine-adaptation of known synthetic approaches and discovery of new reactions. The former approach is most prominently represented by asymmetric homologation of nucleophilic glycine equivalents using fluorinated substrates via alkyl halide alkylations, aldol and Michael addition reactions. A plethora of discovered unexpected reaction outcomes, in particular stereochemical, are emphasized in this review and the particular role of fluorine, in altering the 'normal' reaction result, is explained. The latter direction is notably represented by the novel 1,3-proton shift reaction, a biomimetic reductive amination of fluorinated carbonyl compounds to the corresponding amines and amino acids, as well as the development of α-fluoroalkyl epoxides as true fluorinated synthons for generalized asymmetric synthesis of various biologically relevant compounds. Despite the highly anticipated potential of fluorine-containing amino compounds, their medicinal chemistry still remains underexplored. The major obstacle, in our opinion, is that these selectively fluorinated compounds are generally unavailable to the medicinal chemists for comprehensive, systematic study. We hope this review of synthetic methods will highlight and bring attention to particular types of fluorinated amino acids and related compounds readily available on a laboratory scale using methods developed by our group.
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Kashikura W, Mori K, Akiyama T. Chiral Phosphoric Acid Catalyzed Enantioselective Synthesis of β-Amino-α,α-difluoro Carbonyl Compounds. Org Lett 2011; 13:1860-3. [DOI: 10.1021/ol200374m] [Citation(s) in RCA: 110] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Affiliation(s)
- Wataru Kashikura
- Department of Chemistry, Gakushuin University, 1-5-1 Mejiro, Toshima-ku, Tokyo 171-8588, Japan
| | - Keiji Mori
- Department of Chemistry, Gakushuin University, 1-5-1 Mejiro, Toshima-ku, Tokyo 171-8588, Japan
| | - Takahiko Akiyama
- Department of Chemistry, Gakushuin University, 1-5-1 Mejiro, Toshima-ku, Tokyo 171-8588, Japan
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50
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Chen G, He G, Xue C, Fu C, Ma S. Diversified assembly of perfluoroalkyl-substituted furans and 2,5-dihydrofuran-2-ols. Tetrahedron Lett 2011. [DOI: 10.1016/j.tetlet.2010.10.085] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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