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Đorđević Zlatković MR, Radulović NS, Dangalov M, Vassilev NG. Conformation Analysis and Stereodynamics of Symmetrically ortho-Disubstituted Carvacrol Derivatives. Molecules 2024; 29:1962. [PMID: 38731453 PMCID: PMC11085911 DOI: 10.3390/molecules29091962] [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: 03/22/2024] [Revised: 04/12/2024] [Accepted: 04/19/2024] [Indexed: 05/13/2024] Open
Abstract
The design and synthesis of analogs of natural products can be a valuable source of medicinal preparations for the pharmaceutical industry. In the present study, the structural elucidation of eleven derivatives of 2,4-dihalogeno substituted synthetic analogues of the natural compound carvacrol was carried out by means of NMR experiments, and of another thirteen by DFT calculations. By selective NOE experiments and the irradiation of CH signals of the isopropyl group, individual conformers were assigned as syn and anti. By comparing GIAO/B3LYP/6-311++G(d,p)-calculated and experimentally measured vicinal 3JCH spin-spin constants, this assignment was confirmed. An unusual relationship is reported for proton-carbon vicinal couplings: 3JCH (180°) < 3JCH (0°). The conformational mobility of carvacrols was studied by 2D EXSY spectra. The application of homonuclear decoupling technique (HOBS) to these spectra simplifies the spectra, improves resolution without reducing the sensitivity, and allows a systematic examination of the rotational barrier of all compounds via their CH signals of the isopropyl group in a wider temperature interval. The rate constants of the isopropyl rotation between syn and anti conformers were determined and the corresponding energy barriers (14-17 kcal/mol) were calculated. DFT calculations of the energy barriers in carvacrol derivatives allowed the determination of the steric origin of the restricted isopropyl rotation. The barrier height depends on the size of the 2- and 4-position substituents, and is independent of the derivatization of the OH group.
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Affiliation(s)
| | - Niko S. Radulović
- Department of Chemistry, Faculty of Sciences and Mathematics, University of Niš, Višegradska 33, 18000 Niš, Serbia;
| | - Miroslav Dangalov
- Institute of Organic Chemistry with Centre of Phytochemistry, Bulgarian Academy of Sciences, Acad. G. Bontchev Str. Bl. 9, 1113 Sofia, Bulgaria;
| | - Nikolay G. Vassilev
- Institute of Organic Chemistry with Centre of Phytochemistry, Bulgarian Academy of Sciences, Acad. G. Bontchev Str. Bl. 9, 1113 Sofia, Bulgaria;
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Phang YL, Liu S, Zheng C, Xu H. Recent advances in the synthesis of natural products containing the phloroglucinol motif. Nat Prod Rep 2022; 39:1766-1802. [PMID: 35762867 DOI: 10.1039/d1np00077b] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
Covering: June 2009 to 2021Natural products containing a phloroglucinol motif include simple and oligomeric phloroglucinols, polycyclic polyprenylated acylphloroglucinols, phloroglucinol-terpenes, xanthones, flavonoids, and coumarins. These compounds represent a major class of secondary metabolites which exhibit a wide range of biological activities such as antimicrobial, anti-inflammatory, antioxidant and hypoglycaemic properties. A number of these compounds have been authorized for therapeutic use or are currently being studied in clinical trials. Their structural diversity and utility in both traditional and conventional medicine have made them popular synthetic targets over the years. In this review, we compile and summarise the recent synthetic approaches to the natural products bearing a phloroglucinol motif. Focus has been given on ingenious strategies to functionalize the phloroglucinol moiety at multiple positions. The isolation and bioactivities of the compounds are also provided.
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Affiliation(s)
- Yee Lin Phang
- School of Pharmacy, Shanghai University of Traditional Chinese Medicine, Shanghai 201203, China. .,Engineering Research Center of Shanghai Colleges for TCM New Drug Discovery, Shanghai 201203, China
| | - Song Liu
- School of Pharmacy, Shanghai University of Traditional Chinese Medicine, Shanghai 201203, China. .,Engineering Research Center of Shanghai Colleges for TCM New Drug Discovery, Shanghai 201203, China
| | - Changwu Zheng
- School of Pharmacy, Shanghai University of Traditional Chinese Medicine, Shanghai 201203, China. .,Engineering Research Center of Shanghai Colleges for TCM New Drug Discovery, Shanghai 201203, China
| | - Hongxi Xu
- Shuguang Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai, 201203, China.
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Construction of Benzo‐Fused Heterocycles by Epoxide–Heteronucleophile Cyclization: Applications in the Synthesis of Natural Products and Designed Molecules. European J Org Chem 2022. [DOI: 10.1002/ejoc.202101034] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Chen Z, Pitchakuntla M, Jia Y. Synthetic approaches to natural products containing 2,3-dihydrobenzofuran skeleton. Nat Prod Rep 2019; 36:666-690. [DOI: 10.1039/c8np00072g] [Citation(s) in RCA: 52] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
This review describes the synthetic approaches to natural products containing the 2,3-dihydrobenzofuran (2,3-DHB) skeleton.
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Affiliation(s)
- Zhuang Chen
- State Key Laboratory of Natural and Biomimetic Drugs
- School of Pharmaceutical Sciences
- Peking University
- Beijing 100191
- China
| | - Mallesham Pitchakuntla
- State Key Laboratory of Natural and Biomimetic Drugs
- School of Pharmaceutical Sciences
- Peking University
- Beijing 100191
- China
| | - Yanxing Jia
- State Key Laboratory of Natural and Biomimetic Drugs
- School of Pharmaceutical Sciences
- Peking University
- Beijing 100191
- China
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Di Iorio N, Filippini G, Mazzanti A, Righi P, Bencivenni G. Controlling the C(sp3)–C(sp2) Axial Conformation in the Enantioselective Friedel–Crafts-Type Alkylation of β-Naphthols with Inden-1-ones. Org Lett 2017; 19:6692-6695. [DOI: 10.1021/acs.orglett.7b03415] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Nicola Di Iorio
- Department of Industrial
Chemistry “Toso Montanari”, Alma Mater Studiorum-University of Bologna, Viale del Risorgimento 4, 40136 Bologna, Italy
| | - Giacomo Filippini
- Department of Industrial
Chemistry “Toso Montanari”, Alma Mater Studiorum-University of Bologna, Viale del Risorgimento 4, 40136 Bologna, Italy
| | - Andrea Mazzanti
- Department of Industrial
Chemistry “Toso Montanari”, Alma Mater Studiorum-University of Bologna, Viale del Risorgimento 4, 40136 Bologna, Italy
| | - Paolo Righi
- Department of Industrial
Chemistry “Toso Montanari”, Alma Mater Studiorum-University of Bologna, Viale del Risorgimento 4, 40136 Bologna, Italy
| | - Giorgio Bencivenni
- Department of Industrial
Chemistry “Toso Montanari”, Alma Mater Studiorum-University of Bologna, Viale del Risorgimento 4, 40136 Bologna, Italy
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Flos M, Lameiras P, Denhez C, Mirand C, Berber H. Atropisomerism about Aryl–C(sp3) Bonds: Conformational Behavior of Substituted Phenylcyclohexanes in Solution. J Org Chem 2016; 81:2372-82. [DOI: 10.1021/acs.joc.5b02856] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Manon Flos
- ICMR, CNRS UMR 7312, Université de Reims Champagne-Ardenne, Faculté de Pharmacie, 51 rue Cognacq-Jay, F-51096 Reims Cedex, France
| | - Pedro Lameiras
- ICMR, CNRS UMR 7312, Université de Reims Champagne-Ardenne, Moulin de la Housse, Bâtiment
18, BP 1039, F-51687 Reims Cedex 2, France
| | - Clément Denhez
- ICMR, CNRS UMR 7312, Université de Reims Champagne-Ardenne, Faculté de Pharmacie, 51 rue Cognacq-Jay, F-51096 Reims Cedex, France
| | - Catherine Mirand
- ICMR, CNRS UMR 7312, Université de Reims Champagne-Ardenne, Faculté de Pharmacie, 51 rue Cognacq-Jay, F-51096 Reims Cedex, France
| | - Hatice Berber
- ICMR, CNRS UMR 7312, Université de Reims Champagne-Ardenne, Faculté de Pharmacie, 51 rue Cognacq-Jay, F-51096 Reims Cedex, France
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Dethe DH, Dherange BD. Enantioselective Total Syntheses of (+)-Hostmanin A, (−)-Linderol A, (+)-Methyllinderatin and Structural Reassignment of Adunctin E. J Org Chem 2015; 80:4526-31. [DOI: 10.1021/acs.joc.5b00331] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Dattatraya H. Dethe
- Department
of Chemistry, Indian Institute of Technology Kanpur, Kanpur-208016, India
| | - Balu D. Dherange
- Department
of Chemistry, Indian Institute of Technology Kanpur, Kanpur-208016, India
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Berber H, Lameiras P, Denhez C, Antheaume C, Clayden J. Atropisomerism about Aryl–Csp3 Bonds: The Electronic and Steric Influence of ortho-Substituents on Conformational Exchange in Cannabidiol and Linderatin Derivatives. J Org Chem 2014; 79:6015-27. [DOI: 10.1021/jo5006069] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Affiliation(s)
- Hatice Berber
- ICMR, CNRS UMR
7312, Faculté de Pharmacie, Université de Reims Champagne-Ardenne, 51 rue Cognacq-Jay, F-51096 Reims Cedex, France
| | - Pedro Lameiras
- ICMR, CNRS UMR
7312, Université de Reims Champagne-Ardenne, Moulin de la Housse, Bâtiment
18, BP 1039, F-51687 Reims Cedex 2, France
| | - Clément Denhez
- ICMR, CNRS UMR
7312, Faculté de Pharmacie, Université de Reims Champagne-Ardenne, 51 rue Cognacq-Jay, F-51096 Reims Cedex, France
- Multiscale
Molecular Modeling Platform, Université de Reims Champagne-Ardenne, UFR Sciences Exactes et Naturelles, F-51687 Reims Cedex
2, France
| | - Cyril Antheaume
- Faculté de
Pharmacie, Service Commun d’Analyse, 74 route du Rhin, BP 60024, F-67401 Illkirch Cedex, France
| | - Jonathan Clayden
- School
of Chemistry, University of Manchester, Oxford Road, Manchester M13 9PL, U.K
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Yamashita M, Kitao J, Kitamura N, Kumo N, Kurume A, Arimitsu K, Iwasaki H, Ozeki M. The First Total Syntheses of (+)-Hostmanin A and (+)-Methyllinderatin. HETEROCYCLES 2011. [DOI: 10.3987/com-10-12084] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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