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Tanács D, Berkecz R, Bozsó Z, Tóth GK, Armstrong DW, Péter A, Ilisz I. Liquid Chromatographic Enantioseparation of Newly Synthesized Fluorinated Tryptophan Analogs Applying Macrocyclic Glycopeptides-Based Chiral Stationary Phases Utilizing Core-Shell Particles. Int J Mol Sci 2024; 25:4719. [PMID: 38731937 PMCID: PMC11083430 DOI: 10.3390/ijms25094719] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2024] [Revised: 04/16/2024] [Accepted: 04/24/2024] [Indexed: 05/13/2024] Open
Abstract
Due to the favorable features obtained through the incorporation of fluorine atom(s), fluorinated drugs are a group with emerging pharmaceutical importance. As their commercial availability is still very limited, to expand the range of possible candidates, new fluorinated tryptophan analogs were synthesized. Control of enantiopurity during the synthesis procedure requires that highly efficient enantioseparation methods be available. In this work, the enantioseparation of seven fluorinated tryptophans and tryptophan was studied and compared systematically to (i) develop analytical methods for enantioselective separations and (ii) explore the chromatographic features of the fluorotrytophans. For enantioresolution, macrocyclic glycopeptide-based selectors linked to core-shell particles were utilized, applying liquid chromatography-based methods. Application of the polar-ionic mode resulted in asymmetric and broadened peaks, while reversed-phase conditions, together with mobile-phase additives, resulted in baseline separation for all studied fluorinated tryptophans. The marked differences observed between the methanol and acetonitrile-containing eluent systems can be explained by the different solvation abilities of the bulk solvents of the applied mobile phases. Among the studied chiral selectors, teicoplanin and teicoplanin aglycone were found to work effectively. Under optimized conditions, baseline separations were achieved within 6 min. Ionic interactions were semi-quantitatively characterized and found to not influence enantiorecognition. Interestingly, fluorination of the analytes does not lead to marked changes in the chromatographic characteristics of the methanol-containing eluents, while larger differences were noticed when the polar but aprotic acetonitrile was applied. Experiments conducted on the influence of the separation temperature indicated that the separations are enthalpically driven, with only one exception. Enantiomeric elution order was found to be constant on both teicoplanin and teicoplanin aglycone-based chiral stationary phases (L < D) under all applied chromatographic conditions.
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Affiliation(s)
- Dániel Tanács
- Institute of Pharmaceutical Analysis, University of Szeged, H-6720 Szeged, Hungary; (D.T.); (R.B.); (A.P.)
| | - Róbert Berkecz
- Institute of Pharmaceutical Analysis, University of Szeged, H-6720 Szeged, Hungary; (D.T.); (R.B.); (A.P.)
| | - Zsolt Bozsó
- Department of Medical Chemistry, University of Szeged, H-6720 Szeged, Hungary; (Z.B.); (G.K.T.)
| | - Gábor K. Tóth
- Department of Medical Chemistry, University of Szeged, H-6720 Szeged, Hungary; (Z.B.); (G.K.T.)
| | - Daniel W. Armstrong
- Department of Chemistry and Biochemistry, University of Texas at Arlington, Arlington, TX 76019-0065, USA;
| | - Antal Péter
- Institute of Pharmaceutical Analysis, University of Szeged, H-6720 Szeged, Hungary; (D.T.); (R.B.); (A.P.)
| | - István Ilisz
- Institute of Pharmaceutical Analysis, University of Szeged, H-6720 Szeged, Hungary; (D.T.); (R.B.); (A.P.)
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Tagami K, Yajima T. Development of Electrophilic Radical Perfluoroalkylation of Electron-Deficient Olefins. CHEM REC 2023; 23:e202300037. [PMID: 37058111 DOI: 10.1002/tcr.202300037] [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: 01/30/2023] [Revised: 03/31/2023] [Indexed: 04/15/2023]
Abstract
Fluorinated organic compounds have attracted significant attention over the past few decades owing to their unique properties and versatility. An established method for the synthesis of fluorinated organic compounds involves radical perfluoroalkylation reactions towards double bonds. In this radical pathway, electrophilic perfluoroalkyl radicals exhibit excellent reactivity towards electron-rich olefins. Therefore, several splendid perfluoroalkylation reactions of electron-rich olefins have been reported. However, there are only a few examples of reaction involving electron-deficient olefins because of their poor electronic compatibility with perfluoroalkyl radicals. This review focuses on the reports that challenge this long-standing issue. Radical perfluoroalkylation/bifunctionalization reactions of electron-deficient olefins are described according to the radical generation methods.
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Affiliation(s)
- Koto Tagami
- Department of Chemistry, Ochanomizu University, Otsuka, Bunkyo-ku, Tokyo, 112-8610, Japan
| | - Tomoko Yajima
- Department of Chemistry, Ochanomizu University, Otsuka, Bunkyo-ku, Tokyo, 112-8610, Japan
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Tanács D, Berkecz R, Shahmohammadi S, Forró E, Armstrong DW, Péter A, Ilisz I. Macrocykclic glycopeptides- and derivatized cyclofructan-based chiral stationary phases for the enantioseparation of fluorinated ß-phenylalanine analogs. J Pharm Biomed Anal 2022; 219:114912. [DOI: 10.1016/j.jpba.2022.114912] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2022] [Revised: 06/20/2022] [Accepted: 06/23/2022] [Indexed: 10/17/2022]
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Németi G, Berkecz R, Shahmohammadi S, Forró E, Lindner W, Péter A, Ilisz I. Enantioselective high-performance liquid chromatographic separation of fluorinated ß- phenylalanine derivatives utilizing Cinchona alkaloid-based ion-exchanger chiral stationary phases. J Chromatogr A 2022; 1670:462974. [DOI: 10.1016/j.chroma.2022.462974] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2022] [Revised: 03/11/2022] [Accepted: 03/13/2022] [Indexed: 12/15/2022]
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Kawamura S, Sodeoka M. Fluoroalkylation Methods for Synthesizing Versatile Building Blocks. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2019. [DOI: 10.1246/bcsj.20190080] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Shintaro Kawamura
- RIKEN Center for Sustainable Resource Science, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
- Synthetic Organic Chemistry Laboratory, RIKEN Cluster for Pioneering Research, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - Mikiko Sodeoka
- RIKEN Center for Sustainable Resource Science, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
- Synthetic Organic Chemistry Laboratory, RIKEN Cluster for Pioneering Research, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
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6
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7
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An W, Ha N, Lee HM, Malpani YR, Lee DH, Jung YS, Han SB. Copper-Mediated Halotrifluoromethylation of Unactivated Alkenes. Adv Synth Catal 2015. [DOI: 10.1002/adsc.201500731] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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Egami H, Usui Y, Kawamura S, Nagashima S, Sodeoka M. Product Control in Alkene Trifluoromethylation: Hydrotrifluoromethylation, Vinylic Trifluoromethylation, and Iodotrifluoromethylation using Togni Reagent. Chem Asian J 2015; 10:2190-9. [PMID: 25960034 PMCID: PMC4600224 DOI: 10.1002/asia.201500359] [Citation(s) in RCA: 55] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2015] [Accepted: 05/09/2015] [Indexed: 11/25/2022]
Abstract
Hydrotrifluoromethylation, vinylic trifluoromethylation, and iodotrifluoromethylation of simple alkenes have been achieved by using Togni reagent in the absence of any transition metal catalyst. These reactions were readily controllable by selection of appropriate salts and solvents. The addition of K2CO3 afforded the hydrotrifluoromethylation product, with DMF acting not only as a solvent, but also as the hydrogen source. In contrast, the use of tetra-n-butylammonium iodide (TBAI) in 1,4-dioxane resulted in vinylic trifluoromethylation, while the use of KI afforded the iodotrifluoromethylation product. The vinylic trifluoromethylation product was obtained by treatment of the iodotrifluoromethylation product with ammonium 2-iodobenzoate, indicating that it was formed through an elimination reaction of the in-situ-generated iodotrifluoromethylation product, and the solubility of the resulting 2-iodobenzoate salt plays a key role in the product switching. A radical-clock experiment showed that these reactions proceed via radical intermediates.
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Affiliation(s)
- Hiromichi Egami
- Synthetic Organic Chemistry Laboratory, RIKEN2-1 Hirosawa, Wako, Saitama, 351-0198, Japan E-mail:
- Sodeoka Live Cell Chemistry Project, ERATO, Japan Science and Technology Agency2-1 Hirosawa, Wako, Saitama, 351-0198, Japan
- RIKEN Center for Sustainable Resource Science2-1 Hirosawa, Wako, Saitama, 351-0198, Japan
| | - Yoshihiko Usui
- Synthetic Organic Chemistry Laboratory, RIKEN2-1 Hirosawa, Wako, Saitama, 351-0198, Japan E-mail:
- School of Pharmaceutical Sciences, University of Shizuoka5-1 Yada, Suruga-ku, Shizuoka, 422-8526, Japan
| | - Shintaro Kawamura
- Synthetic Organic Chemistry Laboratory, RIKEN2-1 Hirosawa, Wako, Saitama, 351-0198, Japan E-mail:
- Sodeoka Live Cell Chemistry Project, ERATO, Japan Science and Technology Agency2-1 Hirosawa, Wako, Saitama, 351-0198, Japan
- Graduate School of Science and Engineering, Saitama University255 Shimo-okubo, Sakura-ku, Saitama, 338-8570, Japan
| | - Sayoko Nagashima
- School of Pharmaceutical Sciences, University of Shizuoka5-1 Yada, Suruga-ku, Shizuoka, 422-8526, Japan
| | - Mikiko Sodeoka
- Synthetic Organic Chemistry Laboratory, RIKEN2-1 Hirosawa, Wako, Saitama, 351-0198, Japan E-mail:
- Sodeoka Live Cell Chemistry Project, ERATO, Japan Science and Technology Agency2-1 Hirosawa, Wako, Saitama, 351-0198, Japan
- Graduate School of Science and Engineering, Saitama University255 Shimo-okubo, Sakura-ku, Saitama, 338-8570, Japan
- School of Pharmaceutical Sciences, University of Shizuoka5-1 Yada, Suruga-ku, Shizuoka, 422-8526, Japan
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Kawamura S, Egami H, Sodeoka M. Aminotrifluoromethylation of Olefins via Cyclic Amine Formation: Mechanistic Study and Application to Synthesis of Trifluoromethylated Pyrrolidines. J Am Chem Soc 2015; 137:4865-73. [DOI: 10.1021/jacs.5b02046] [Citation(s) in RCA: 104] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Shintaro Kawamura
- Synthetic
Organic Chemistry Laboratory, RIKEN, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
- RIKEN Center for Sustainable Resource Science, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
- Sodeoka
Live Cell Chemistry Project, ERATO, Japan Science and Technology Agency, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - Hiromichi Egami
- Synthetic
Organic Chemistry Laboratory, RIKEN, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
- Sodeoka
Live Cell Chemistry Project, ERATO, Japan Science and Technology Agency, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - Mikiko Sodeoka
- Synthetic
Organic Chemistry Laboratory, RIKEN, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
- RIKEN Center for Sustainable Resource Science, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
- Sodeoka
Live Cell Chemistry Project, ERATO, Japan Science and Technology Agency, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
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Yoshioka E, Kohtani S, Tanaka E, Hata Y, Miyabe H. Carbon radical addition–cyclization reaction induced by ruthenium-photocatalyst under visible light irradiation. Tetrahedron 2015. [DOI: 10.1016/j.tet.2014.12.068] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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11
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Ali I, Al-Othman ZA, Al-Warthan A, Asnin L, Chudinov A. Advances in chiral separations of small peptides by capillary electrophoresis and chromatography. J Sep Sci 2014; 37:2447-66. [DOI: 10.1002/jssc.201400587] [Citation(s) in RCA: 101] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2014] [Revised: 06/26/2014] [Accepted: 06/27/2014] [Indexed: 01/27/2023]
Affiliation(s)
- Imran Ali
- Department of Chemistry, Jamia Millia Islamia (Central University); New Delhi India
| | - Zeid A. Al-Othman
- Department of Chemistry, College of Science; King Saud University; Riyadh Kingdom of Saudi Arabia
| | - Abdulrahman Al-Warthan
- Department of Chemistry, College of Science; King Saud University; Riyadh Kingdom of Saudi Arabia
| | - Leonid Asnin
- Perm National Research Polytechnic University; Perm Russia
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Egami H, Sodeoka M. Trifluormethylierung von Alkenen unter gleichzeitiger Einführung weiterer funktioneller Gruppen. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201309260] [Citation(s) in RCA: 139] [Impact Index Per Article: 13.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
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13
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Egami H, Sodeoka M. Trifluoromethylation of alkenes with concomitant introduction of additional functional groups. Angew Chem Int Ed Engl 2014; 53:8294-308. [PMID: 24961669 DOI: 10.1002/anie.201309260] [Citation(s) in RCA: 555] [Impact Index Per Article: 55.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2013] [Indexed: 11/08/2022]
Abstract
The trifluoromethyl group is found in many synthetic bioactive compounds, and the difunctionalization of a C=C bond, as a powerful strategy for the construction of compounds with various functional groups, has been intensively investigated. Therefore, the difunctionalizing trifluoromethylation of alkenes has attracted growing interest because of the potential of the products as building blocks for bioactive molecules. In this review, we focus on recent advances in the trifluoromethylation of alkenes with concomitant introduction of additional functional groups.
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Affiliation(s)
- Hiromichi Egami
- Synthetic Organic Chemistry Laboratory, RIKEN, 2-1 Hirosawa, Wako, Saitama 351-0198 (Japan); Sodeoka Live Cell Chemistry Project, ERATO, JST, 2-1 Hirosawa, Wako, Saitama 351-0198 (Japan)
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Yoshioka E, Kohtani S, Sawai K, Kentefu, Tanaka E, Miyabe H. Polarity-mismatched addition of electrophilic carbon radicals to an electron-deficient acceptor: cascade radical addition-cyclization-trapping reaction. J Org Chem 2012; 77:8588-604. [PMID: 22963515 DOI: 10.1021/jo3015227] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The polarity-mismatched perfluoroalkyl radical addition to electron-deficient alkenes was studied. For this study, several substrates having two polarity-different radical acceptors were employed to investigate the regiochemical courses of cascade reaction. In the case of substrate 1 having a methacryloyl moiety, we found polarity-mismatched perfluoroalkylation giving 15a-e as a major course over the polarity-matched perfluoroalkylation giving 16a-e. Moreover, in the case of substrates 2-7, perfluoroalkyl radicals selectively added to an electron-deficient alkene moiety of 2-7, to give polarity-mismatched perfluoroalkylation products without the formation of regioisomers. Next, the control of enantioselectivity was studied. In the case of substrates 1 and 3, the reaction proceeded with good enantioselectivities by employing a chiral Lewis acid, prepared from chiral box ligand 24 and Zn(OTf)(2). For direct comparison, we also studied the reaction with other carbon radicals, derived from ICH(2)CO(2)Et, ICH(2)CN, BrC(CO(2)Et)(2)Me, and CCl(3)Br, which have electrophilic character.
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Affiliation(s)
- Eito Yoshioka
- School of Pharmacy, Hyogo University of Health Sciences, Minatojima, Chuo-ku, Kobe 650-8530, Japan
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Erdbrink H, Peuser I, Gerling UIM, Lentz D, Koksch B, Czekelius C. Conjugate hydrotrifluoromethylation of α,β-unsaturated acyl-oxazolidinones: synthesis of chiral fluorinated amino acids. Org Biomol Chem 2012; 10:8583-6. [PMID: 23042408 DOI: 10.1039/c2ob26810h] [Citation(s) in RCA: 51] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Affiliation(s)
- Holger Erdbrink
- Institut für Chemie und Biochemie, Freie Universität Berlin, Takustr. 3, D-14195 Berlin, Germany
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Yajima T, Tonoi T, Nagano H, Tomita Y, Mikami K. Direct Racemic Mixture Synthesis of Fluorinated Amino Acids by Perfluoroalkyl Radical Addition to Dehydroamino Acids Terminated by Asymmetric Protonation. European J Org Chem 2010. [DOI: 10.1002/ejoc.201000017] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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17
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Affiliation(s)
- Wei Zhang
- Department of Chemistry, University of Massachusetts Boston, 100 Morrissey Boulevard, Boston, Massachusetts 02125
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