1
|
Yin X, Wang X, Song L, Zhang J, Wang X. Recent Progress in Synthesis of Alkyl Fluorinated Compounds with Multiple Contiguous Stereogenic Centers. Molecules 2024; 29:3677. [PMID: 39125080 PMCID: PMC11314154 DOI: 10.3390/molecules29153677] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2024] [Revised: 07/31/2024] [Accepted: 07/31/2024] [Indexed: 08/12/2024] Open
Abstract
Organic fluorides are widely used in pharmaceuticals, agrochemicals, material sciences, and other fields due to the special physical and chemical properties of fluorine atoms. The synthesis of alkyl fluorinated compounds bearing multiple contiguous stereogenic centers is the most challenging research area in synthetic chemistry and has received extensive attention from chemists. This review summarized the important research progress in the field over the past decade, including asymmetric electrophilic fluorination and the asymmetric elaboration of fluorinated substrates (such as allylic alkylation reactions, hydrofunctionalization reactions, Mannich addition reactions, Michael addition reactions, aldol addition reactions, and miscellaneous reactions), with an emphasis on synthetic methodologies, substrate scopes, and reaction mechanisms.
Collapse
Affiliation(s)
- Xuemei Yin
- College of Pharmacy, Southwest Minzu University, Chengdu 610041, China; (L.S.)
| | - Xihong Wang
- Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610213, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Lei Song
- College of Pharmacy, Southwest Minzu University, Chengdu 610041, China; (L.S.)
| | - Junxiong Zhang
- College of Pharmacy, Southwest Minzu University, Chengdu 610041, China; (L.S.)
| | - Xiaoling Wang
- College of Pharmacy, Southwest Minzu University, Chengdu 610041, China; (L.S.)
| |
Collapse
|
2
|
Escorihuela J, Fustero S. Fluorinated Imines in Tandem and Cycloaddition Reactions. CHEM REC 2023; 23:e202200262. [PMID: 36633495 DOI: 10.1002/tcr.202200262] [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: 11/24/2022] [Revised: 12/23/2022] [Indexed: 01/13/2023]
Abstract
The chemistry of fluorinated compounds has experienced extraordinary growth in recent decades due to the many and varied properties which many of the compounds that contain fluorinated groups possess. Among all of them, fluorinated chiral imines, in particular the Ellman's imines, are of great importance since they are some of the most interesting building blocks for the synthesis of a large number of enantioenriched carbocycles and heterocycles with extraordinary biological and synthetic properties. This personal account covers the most significant results obtained in our research group in the last two decades concerning asymmetric tandem reactions, paying special attention to the intramolecular aza-Michael reaction (IMAMR), diversity oriented synthesis (DOS), asymmetric tandem reactions involving a p-tolylsulfinyl group as chiral inducer and cycloaddition processes, in particular, the Pauson-Khand reaction, [2+2+2]-cycloadditions and metathesis reactions, starting mainly from enyne compounds and through the use of fluorinated chiral N-sulfinyl imines and their derivatives as starting materials.
Collapse
Affiliation(s)
- Jorge Escorihuela
- Departamento de Química Orgánica, Universitat de València, Avda. Vicente Andrés Estellés s/n, Burjassot 46100, València, Spain
| | - Santos Fustero
- Departamento de Química Orgánica, Universitat de València, Avda. Vicente Andrés Estellés s/n, Burjassot 46100, València, Spain
| |
Collapse
|
3
|
Briand M, Anselmi E, Dagousset G, Magnier E. The Revival of Enantioselective Perfluoroalkylation - Update of New Synthetic Approaches from 2015-2022. CHEM REC 2023; 23:e202300114. [PMID: 37219007 DOI: 10.1002/tcr.202300114] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2023] [Revised: 05/02/2023] [Indexed: 05/24/2023]
Abstract
Over the last years, methods devoted to the synthesis of asymmetric molecules bearing a perfluoroalkylated chain have been limited in number. Among them, only a few can be used on a large variety of scaffolds. This microreview aims at summarizing these recent advances in enantioselective perfluoroalkylation (-CF3 , -CF2 H, -Cn F2n+1 ) and highlights the need for new enantioselective methods to easily synthesize chiral fluorinated molecules which would be useful for the pharmaceutical and agrochemical industries. Some perspectives are also mentioned.
Collapse
Affiliation(s)
- Marina Briand
- Université Paris-Saclay, UVSQ, CNRS, UMR 8180 Institut Lavoisier de Versailles, 45 Avenue des Etats-Unis, 78035, Versailles Cedex, France
| | - Elsa Anselmi
- Université Paris-Saclay, UVSQ, CNRS, UMR 8180 Institut Lavoisier de Versailles, 45 Avenue des Etats-Unis, 78035, Versailles Cedex, France
- Université de Tours, Faculté des Sciences et Techniques, Parc Grandmont, Avenue Monge, 37200, Tours, France
| | - Guillaume Dagousset
- Université Paris-Saclay, UVSQ, CNRS, UMR 8180 Institut Lavoisier de Versailles, 45 Avenue des Etats-Unis, 78035, Versailles Cedex, France
| | - Emmanuel Magnier
- Université Paris-Saclay, UVSQ, CNRS, UMR 8180 Institut Lavoisier de Versailles, 45 Avenue des Etats-Unis, 78035, Versailles Cedex, France
| |
Collapse
|
4
|
Shibata N, Cahard D. N-Fluoro Ammonium Salts of Cinchona Alkaloids in Enantioselective Electrophilic Fluorination. CHEM REC 2023; 23:e202300096. [PMID: 37096873 DOI: 10.1002/tcr.202300096] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2023] [Revised: 03/31/2023] [Indexed: 04/26/2023]
Abstract
From 2000, our two research groups independently and simultaneously designed and developed a novel family of electrophilic fluorinating reagents based on the use of Cinchona alkaloids. The chiral N-fluoro ammonium salts demonstrated the highest efficiency compared to prior art in enantioselective electrophilic fluorination for a wide range of substrates. In this account, we tell our respective stories, how the same idea germinated in our laboratories, the characterization of the chiral reagents, the use in stoichiometric quantity then the development of a catalytic version, the application to the synthesis of chiral fluorinated molecules of pharmaceutical interest, and finally the exploitation of our reagents by other teams and for other applications.
Collapse
Affiliation(s)
- Norio Shibata
- Department of Engineering, Department of Nanopharmaceutical Sciences, Nagoya Institute of Technology, Gokiso, Showa-ku, Nagoya, 466-8555, Japan
| | - Dominique Cahard
- CNRS, UMR 6014 COBRA - Normandie Université, 76821, Mont Saint Aignan, France
| |
Collapse
|
5
|
Pavlović RZ, Kop TJ, Nešić M, Stepanović O, Wang X, Todorović N, Rodić MV, Šmit BM. On the Selectivity in the Synthesis of 3-Fluoropiperidines Using BF 3-Activated Hypervalent Iodine Reagents. J Org Chem 2023. [PMID: 37449517 DOI: 10.1021/acs.joc.3c00944] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/18/2023]
Abstract
Fluorinated piperidines find wide applications, most notably in the development of novel therapies and agrochemicals. Cyclization of alkenyl N-tosylamides promoted by BF3-activated aryliodine(III) carboxylates is an attractive strategy to construct 3-fluoropiperidines, but it suffers from selectivity issues arising from competitive oxoaminations and the inability to easily modulate the reactions diastereoselectivity. Herein, we report an itemized optimization of the reaction conditions carried out on both cyclic and acyclic substrates and outline the origins of substrate- and reagent-based stereo-, regio-, and chemoselectivity. Extensive mechanistic studies encompassing multinuclear NMR spectroscopy, deuterium labeling, rearrangements on stereodefined substrates, and careful structural analyses (NMR and X-ray) of the reaction products are performed. This revealed the processes and interactions crucial for achieving controlled preparation of 3-fluoropiperidines using I(III) chemistry and has provided an advanced understanding of the reaction mechanism. In brief, we propose that BF3-coordinated I(III) reagents attack C═C to produce the corresponding iodiranium(III) ion, which then undergoes diastereodetermining 5-exo-cyclization. Transiently formed pyrrolidines with an exocyclic σ-alkyl-I(III) moiety can further undergo aziridinium ion formation or reductive ligand coupling processes, which dictate not only the final product's ring size but also the chemoselectivity. Importantly, the selectivity of the reaction depends on the nature of the ligand bound to I(III) and the presence of electrolytes such as TBABF4. Reported findings will facilitate the usage of ArI(III)-dicarboxylates in the reliable construction of fluorinated azaheterocycles.
Collapse
Affiliation(s)
- Radoslav Z Pavlović
- Department of Chemistry & Biochemistry, The Ohio State University, 100 West 18th Avenue, Columbus, Ohio 43210, United States
- Institute of Chemistry, Technology and Metallurgy, Department of Chemistry, University of Belgrade, Njegoševa 12, Belgrade 11000, Serbia
| | - Tatjana J Kop
- Institute of Chemistry, Technology and Metallurgy, Department of Chemistry, University of Belgrade, Njegoševa 12, Belgrade 11000, Serbia
| | - Marko Nešić
- Roger Adams Laboratory, Department of Chemistry, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, United States
| | - Olivera Stepanović
- Laboratory of Organic Chemistry, ETH Zürich, Vladimir-Prelog-Weg 3, Zürich 8093, Switzerland
| | - Xiuze Wang
- Department of Chemistry & Biochemistry, The Ohio State University, 100 West 18th Avenue, Columbus, Ohio 43210, United States
| | - Nina Todorović
- Institute of Chemistry, Technology and Metallurgy, Department of Chemistry, University of Belgrade, Njegoševa 12, Belgrade 11000, Serbia
| | - Marko V Rodić
- Faculty of Sciences, University of Novi Sad, Trg Dositeja Obradovića 3, Novi Sad 21000, Serbia
| | - Biljana M Šmit
- Institute for Information Technologies, Department of Science, University of Kragujevac, Jovana Cvijića bb, Kragujevac 34000, Serbia
| |
Collapse
|
6
|
Wang Y, Wang S, Wu Y, Zhao T, Liu J, Zheng J, Wang L, Lv J, Zhang T. Fast, highly enantioselective, and sustainable fluorination of 4-substituted pyrazolones catalyzed by amide-based phase-transfer catalysts. Org Chem Front 2023. [DOI: 10.1039/d3qo00269a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/05/2023]
Abstract
Highly enantioselective and sustainable fluorination of 4-substituted pyrazolones has been developed by amide-based phase-transfer catalysts.
Collapse
Affiliation(s)
- Yakun Wang
- School of Pharmacy, Xinxiang Medical University, Xinxiang, Henan 453003, P.R. China
| | - Shuaifei Wang
- School of Pharmacy, Xinxiang Medical University, Xinxiang, Henan 453003, P.R. China
| | - Yufeng Wu
- School of Chemical Engineering, Dalian University of Technology, Dalian, Liaoning 116024, P.R. China
| | - Ting Zhao
- School of Pharmacy, Shenyang Pharmaceutical University, Shenyang, Liaoning 117004, P.R. China
| | - Jie Liu
- School of Pharmacy, Xinxiang Medical University, Xinxiang, Henan 453003, P.R. China
| | - Junlin Zheng
- School of Pharmacy, Xinxiang Medical University, Xinxiang, Henan 453003, P.R. China
| | - Lin Wang
- School of Pharmacy, Xinxiang Medical University, Xinxiang, Henan 453003, P.R. China
| | - Jieli Lv
- School of Pharmacy, Xinxiang Medical University, Xinxiang, Henan 453003, P.R. China
| | - Tao Zhang
- School of Pharmacy, Xinxiang Medical University, Xinxiang, Henan 453003, P.R. China
| |
Collapse
|
7
|
Gu X, Liu K, Yang L, Xie C, Li M, Wang JJ. Nickel-catalyzed enantioselective α-heteroarylation of ketones via C-F bond activation to construct all-carbon quaternary stereocenters. Chem Sci 2022; 13:12498-12502. [PMID: 36382277 PMCID: PMC9629005 DOI: 10.1039/d2sc03409c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2022] [Accepted: 09/11/2022] [Indexed: 09/19/2023] Open
Abstract
Nickel-catalyzed asymmetric α-heteroarylation of ketones with fluorinated heteroarenes is reported via C-F bond activation. A series of ketones and 2-fluoropyridine derivatives with different functional groups proceed well to provide the corresponding products containing all-carbon quaternary stereocenters in good yields (up to 99% yield) and high ee values (up to 99% ee). In addition, drug molecule donepezil could also be compatible under the reaction conditions to afford late-stage diversification of pharmaceuticals.
Collapse
Affiliation(s)
- Xiaodong Gu
- Department of Chemistry, Hong Kong Baptist University Kowloon Hong Kong China
| | - Kexin Liu
- Department of Chemistry, Hong Kong Baptist University Kowloon Hong Kong China
| | - Limin Yang
- College of Materials, Chemistry and Chemical Engineering, Hangzhou Normal University Hangzhou 311121 China
| | - Chengyi Xie
- Department of Chemistry, Hong Kong Baptist University Kowloon Hong Kong China
| | - Mingliang Li
- Department of Chemistry, Southern University of Science and Technology (SUSTech) Shenzhen 518055 China
| | - Jun Joelle Wang
- Department of Chemistry, Hong Kong Baptist University Kowloon Hong Kong China
- Department of Chemistry, Southern University of Science and Technology (SUSTech) Shenzhen 518055 China
| |
Collapse
|
8
|
Remete AM, Nonn M, Kiss L. Palladium‐Catalyzed Arylfluorination of Alkenes: A Powerful New Approach to Organofluorine Compounds. Chemistry 2022; 28:e202202076. [DOI: 10.1002/chem.202202076] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2022] [Indexed: 11/11/2022]
Affiliation(s)
- Attila Márió Remete
- Institute of Pharmaceutical Chemistry University of Szeged 6720 Szeged, Eötvös u. 6 Hungary
| | - Melinda Nonn
- MTA TTK Lendület Artificial Transporter Research Group Institute of Materials and Environmental Chemistry Research Center for Natural Sciences Hungarian Academy of Sciences Magyar Tudósok krt. 2 1117 Budapest Hungary
| | - Loránd Kiss
- Institute of Organic Chemistry Stereochemistry Research Group Research Centre for Natural Sciences 1117 Budapest Magyar tudósok krt. 2 Hungary
| |
Collapse
|
9
|
Bazhin DN, Kudyakova YS, Edilova YO, Burgart YV, Saloutin VI. Fluorinated 1,2,4-triketone analogs: new prospects for heterocyclic and coordination chemistry. Russ Chem Bull 2022. [DOI: 10.1007/s11172-022-3539-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/15/2022]
|
10
|
Nonn M, Paizs C, Kiss L. Recent Progress in the Selective Fluorinations of Some Functionalized Cycloalkenes. CHEM REC 2022; 22:e202200130. [PMID: 35680609 DOI: 10.1002/tcr.202200130] [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: 05/09/2022] [Revised: 05/25/2022] [Indexed: 11/09/2022]
Abstract
Organofluorine compounds have had an increasing impact in synthetic organic chemistry and pharmaceutical research over the past two decades. Their syntheses and the development of novel synthetic approaches towards versatile fluorinated small molecules have received great interest. Our research team has designed various selective and stereocontrolled methods for the construction of fluorine-containing small molecular entities, involving the transformation of various functionalized cycloalkenes across their ring olefin bond. The synthetic methodologies developed to access various pharmacologically interesting fluorinated derivatives with multiple chiral centers might be valuable protocols for the preparation of other classes of organic compounds as well.
Collapse
Affiliation(s)
- Melinda Nonn
- MTA TTK Lendület Artificial Transporter Research Group, Institute of Materials and Environmental Chemistry, Research Center for Natural Sciences, Hungarian Academy of Sciences, Magyar Tudósok krt. 2, 1117, Budapest, Hungary
| | - Csaba Paizs
- Babeş-Bolyai University, Faculty of Chemistry and Chemical Engineering, Enzymology and Applied Biocatalysis Research Center, Arany János str. 11, 400028-, Cluj-Napoca, Romania
| | - Loránd Kiss
- Institute of Organic Chemistry, Research Centre for Natural Sciences, H-1117, Budapest, Magyar Tudósok krt. 2, Hungary
| |
Collapse
|
11
|
Remete AM, Nonn M, Novák TT, Csányi D, Kiss L. Recent progress in aryltrifluoromethylation reactions of carbon-carbon multiple bonds. Chem Asian J 2022; 17:e202200395. [PMID: 35584374 DOI: 10.1002/asia.202200395] [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: 04/19/2022] [Revised: 05/18/2022] [Indexed: 11/06/2022]
Abstract
Due to the increasing relevance of fluorine-containing organic molecules in drug design, the synthesis of organofluorine compounds has gained high significance in synthetic organic chemistry. Trifluoromethylative difunctionalizations of carbon-carbon multiple bonds, with the simultaneous incorporation of a CF 3 group and another functional element, have considerable potential. Because of the high importance of carbon-carbon bond-forming reactions in organic synthesis, carbotrifluoromethylations and, in particular, aryltrifluoromethylations or heteroaryltrifluoromethylations are considered to be increasing fields of synthetic organic chemistry. The aim of the current review is to summarize recent developments of aryltrifluoromethylation or heteroaryltrifluoromethylation reactions.
Collapse
Affiliation(s)
- Attila M Remete
- University of Szeged: Szegedi Tudomanyegyetem, INSTITUTE OF PHARMACEUTICAL CHEMISTRY, HUNGARY
| | - Melinda Nonn
- HAS RCNS: Termeszettudomanyi Kutatokozpont, INSTITUTE OF MATERIALS AND ENVIRONMENTAL CHEMISTRY, HUNGARY
| | - Tamás T Novák
- HAS RCNS: Termeszettudomanyi Kutatokozpont, INSTITUTE OF ORGANIC CHEMISTRY, HUNGARY
| | - Dorottya Csányi
- HAS RCNS: Termeszettudomanyi Kutatokozpont, INSTITUTE OF ORGANIC CHEMISTRY, HUNGARY
| | - Lorand Kiss
- Research Centre for Natural Sciences: Termeszettudomanyi Kutatokozpont, Institute of Organic Chemistry, Magyar Tudósok krt, 1117, Budapest, HUNGARY
| |
Collapse
|
12
|
Li YX, Wang JZ, Shimadate Y, Kise M, Kato A, Jia YM, Fleet GWJ, Yu CY. Diastereoselective Synthesis, Glycosidase Inhibition, and Docking Study of C-7-Fluorinated Casuarine and Australine Derivatives. J Org Chem 2022; 87:7291-7307. [PMID: 35584209 DOI: 10.1021/acs.joc.2c00485] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
C-7-fluorinated derivatives of two important polyhydroxylated pyrrolizidines, casuarine and australine, were synthesized with organocatalytic stereoselective α-fluorination of aldehydes as the key step. The strategy is extensively applicable to some synthetically challenging fluorinated iminosugars and carbohydrates. The docking studies indicated that the potent inhibitions of trehalase and amyloglucosidase by the fluorinated polyhydroxylated pyrrolizidines are due to the interaction modes dominated by fluorine atoms in these iminosugars with the amino acids' residues of the corresponding enzymes. Steady interactions were established between the C-7 fluoride and a hydrophobic pocket in amyloglucosidase by untypical anion-π interactions. These unexpected docking modes and related structure-activity relationship studies emphasize the value of fluorination in the design of polyhydroxylated pyrrolizidine glycosidase inhibitors.
Collapse
Affiliation(s)
- Yi-Xian Li
- Beijing National Laboratory for Molecular Science (BNLMS), CAS Key Laboratory of Molecular Recognition and Function, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China.,University of Chinese Academy of Sciences, Beijing 100049, China
| | - Jun-Zhe Wang
- Beijing National Laboratory for Molecular Science (BNLMS), CAS Key Laboratory of Molecular Recognition and Function, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China.,University of Chinese Academy of Sciences, Beijing 100049, China
| | - Yuna Shimadate
- Department of Hospital Pharmacy, University of Toyama, 2630 Sugitani, Toyama 930-0194, Japan.,Faculty of Pharmaceutical Sciences, University of Toyama, Toyama 930-0194, Japan
| | - Maki Kise
- Department of Hospital Pharmacy, University of Toyama, 2630 Sugitani, Toyama 930-0194, Japan.,Faculty of Pharmaceutical Sciences, University of Toyama, Toyama 930-0194, Japan
| | - Atsushi Kato
- Department of Hospital Pharmacy, University of Toyama, 2630 Sugitani, Toyama 930-0194, Japan.,Faculty of Pharmaceutical Sciences, University of Toyama, Toyama 930-0194, Japan
| | - Yue-Mei Jia
- Beijing National Laboratory for Molecular Science (BNLMS), CAS Key Laboratory of Molecular Recognition and Function, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China.,University of Chinese Academy of Sciences, Beijing 100049, China
| | - George W J Fleet
- Chemistry Research Laboratory, Department of Chemistry, University of Oxford, Mansfield Road, Oxford OX1 3TA, U. K
| | - Chu-Yi Yu
- Beijing National Laboratory for Molecular Science (BNLMS), CAS Key Laboratory of Molecular Recognition and Function, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China.,University of Chinese Academy of Sciences, Beijing 100049, China
| |
Collapse
|
13
|
Wannenmacher N, Pfeffer C, Frey W, Peters R. Enantioenriched γ-Aminoalcohols, β-Amino Acids, β-Lactams, and Azetidines Featuring Tetrasubstituted Fluorinated Stereocenters via Palladacycle-Catalyzed Asymmetric Fluorination of Isoxazolinones. J Org Chem 2021; 87:670-682. [PMID: 34890190 DOI: 10.1021/acs.joc.1c02640] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Enantiopure fluorine containing β-amino acids are of large biological and pharmaceutical interest. Strategies to prepare β-amino acid derivatives possessing a F-containing tetrasubstituted stereocenter at the α-C atom in a catalytic asymmetric sense are rare, in particular using an enantioselective electrophilic C-F bond formation. In the present study, a highly enantioselective palladacycle-catalyzed fluorination of isoxazolinones was developed. It is demonstrated that isoxazolinones are useful precursors toward enantiopure β-amino acid derivatives by diastereo- and chemoselective reduction. The formed γ-aminoalcohols served as valuable precursors toward β-amino acids, β-amino acid esters, and β-lactams, all featuring tetrasubstituted fluorinated stereocenters. In addition, by this work, enantioenriched fluorinated azetidines were accessible for the first time.
Collapse
Affiliation(s)
- Nick Wannenmacher
- Institut für Organische Chemie, Universität Stuttgart, Pfaffenwaldring 55, D-70569 Stuttgart, Germany
| | - Camilla Pfeffer
- Institut für Organische Chemie, Universität Stuttgart, Pfaffenwaldring 55, D-70569 Stuttgart, Germany
| | - Wolfgang Frey
- Institut für Organische Chemie, Universität Stuttgart, Pfaffenwaldring 55, D-70569 Stuttgart, Germany
| | - René Peters
- Institut für Organische Chemie, Universität Stuttgart, Pfaffenwaldring 55, D-70569 Stuttgart, Germany
| |
Collapse
|