1
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Kovács T, Lajter I, Kúsz N, Schelz Z, Bózsity-Faragó N, Borbás A, Zupkó I, Krupitza G, Frisch R, Hohmann J, Vasas A, Mándi A. Isolation and NMR Scaling Factors for the Structure Determination of Lobatolide H, a Flexible Sesquiterpene from Neurolaena lobata. Int J Mol Sci 2023; 24:ijms24065841. [PMID: 36982924 PMCID: PMC10052924 DOI: 10.3390/ijms24065841] [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: 01/24/2023] [Revised: 03/11/2023] [Accepted: 03/13/2023] [Indexed: 03/30/2023] Open
Abstract
A new flexible germacranolide (1, lobatolide H) was isolated from the aerial parts of Neurolaena lobata. The structure elucidation was performed by classical NMR experiments and DFT NMR calculations. Altogether, 80 theoretical level combinations with existing 13C NMR scaling factors were tested, and the best performing ones were applied on 1. 1H and 13C NMR scaling factors were also developed for two combinations utilizing known exomethylene containing derivatives, and the results were complemented by homonuclear coupling constant (JHH) and TDDFT-ECD calculations to elucidate the stereochemistry of 1. Lobatolide H possessed remarkable antiproliferative activity against human cervical tumor cell lines with different HPV status (SiHa and C33A), induced cell cycle disturbance and exhibited a substantial antimigratory effect in SiHa cells.
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Affiliation(s)
- Tibor Kovács
- Department of Organic Chemistry, University of Debrecen, P.O. Box 400, 4002 Debrecen, Hungary
- Doctoral School of Chemistry, University of Debrecen, Egyetem tér 1, 4032 Debrecen, Hungary
| | - Ildikó Lajter
- Institute of Pharmacognosy, University of Szeged, Eötvös u. 6, 6720 Szeged, Hungary
| | - Norbert Kúsz
- Institute of Pharmacognosy, University of Szeged, Eötvös u. 6, 6720 Szeged, Hungary
| | - Zsuzsanna Schelz
- Institute of Pharmacodynamics and Biopharmacy, University of Szeged, Eötvös u. 6, 6720 Szeged, Hungary
| | - Noémi Bózsity-Faragó
- Institute of Pharmacodynamics and Biopharmacy, University of Szeged, Eötvös u. 6, 6720 Szeged, Hungary
| | - Anikó Borbás
- Department of Pharmaceutical Chemistry, University of Debrecen, Egyetem tér 1, 4032 Debrecen, Hungary
| | - István Zupkó
- Institute of Pharmacodynamics and Biopharmacy, University of Szeged, Eötvös u. 6, 6720 Szeged, Hungary
| | - Georg Krupitza
- Department of Pathology, Medical University of Vienna, Waehringer Guertel 18-20, 1090 Vienna, Austria
| | - Richard Frisch
- Institute for Ethnobiology, Playa Diana, San José GT-170, Guatemala
| | - Judit Hohmann
- Institute of Pharmacognosy, University of Szeged, Eötvös u. 6, 6720 Szeged, Hungary
- ELKH-USZ Biologically Active Natural Products Research Group, University of Szeged, Eötvös u. 6, 6720 Szeged, Hungary
| | - Andrea Vasas
- Institute of Pharmacognosy, University of Szeged, Eötvös u. 6, 6720 Szeged, Hungary
- ELKH-USZ Biologically Active Natural Products Research Group, University of Szeged, Eötvös u. 6, 6720 Szeged, Hungary
| | - Attila Mándi
- Department of Organic Chemistry, University of Debrecen, P.O. Box 400, 4002 Debrecen, Hungary
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2
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La Ferla B, D’Orazio G. Pyranoid Spirosugars as Enzyme Inhibitors. Curr Org Synth 2021; 18:3-22. [DOI: 10.2174/1570179417666200924152648] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2020] [Revised: 08/25/2020] [Accepted: 08/31/2020] [Indexed: 11/22/2022]
Abstract
Background:
Pyranoid spirofused sugar derivatives represent a class of compounds with a significant
impact in the literature. From the structural point of view, the rigidity inferred by the spirofused entity has made
these compounds object of interest mainly as enzymatic inhibitors, in particular, carbohydrate processing enzymes.
Among them glycogen phosphorylase and sodium glucose co-transporter 2 are important target enzymes
for diverse pathological states. Most of the developed compounds present the spirofused entity at the C1 position
of the sugar moiety; nevertheless, spirofused entities can also be found at other sugar ring positions. The main
spirofused entities encountered are spiroacetals/thioacetals, spiro-hydantoin and derivatives, spiro-isoxazolines,
spiro-aminals, spiro-lactams, spiro-oxathiazole and spiro-oxazinanone, but also others are present.
Objectives:
The present review focuses on the most explored synthetic strategies for the preparation of this class
of compounds, classified according to the position and structure of the spirofused moiety on the pyranoid scaffold.
Moreover, the structures are correlated to their main biological activities or to their role as chiral auxiliaries.
Conclusion:
It is clear from the review that, among the different derivatives, the spirofused structures at position
C1 of the pyranoid scaffold are the most represented and possess the most relevant enzymatic inhibitor activities.
Nevertheless, great efforts have been devoted to the introduction of the spirofused entity also in the other positions,
mainly for the preparation of biologically active compounds but also for the synthesis of chiral auxiliaries
useful in asymmetric reactions; examples of such auxiliaries are the spirofused chiral 1,3-oxazolidin-2-ones and
1,3-oxazolidine-2-thiones.
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Affiliation(s)
- Barbara La Ferla
- Department of Biotechnology and Bioscience, University of Milano-Bicocca, Milan, Italy
| | - Giuseppe D’Orazio
- Department of Biotechnology and Bioscience, University of Milano-Bicocca, Milan, Italy
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3
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Goyard D, Kónya B, Czifrák K, Larini P, Demontrond F, Leroy J, Balzarin S, Tournier M, Tousch D, Petit P, Duret C, Maurel P, Docsa T, Gergely P, Somsák L, Praly JP, Azay-Milhau J, Vidal S. Glucose-based spiro-oxathiazoles as in vivo anti-hyperglycemic agents through glycogen phosphorylase inhibition. Org Biomol Chem 2020; 18:931-940. [PMID: 31922157 DOI: 10.1039/c9ob01190k] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
The design of glycogen phosphorylase (GP) inhibitors targeting the catalytic site of the enzyme is a promising strategy for a better control of hyperglycaemia in the context of type 2 diabetes. Glucopyranosylidene-spiro-heterocycles have been demonstrated as potent GP inhibitors, and more specifically spiro-oxathiazoles. A new synthetic route has now been elaborated through 1,3-dipolar cycloaddition of an aryl nitrile oxide to a glucono-thionolactone affording in one step the spiro-oxathiazole moiety. The thionolactone was obtained from the thermal rearrangement of a thiosulfinate precursor according to Fairbanks' protocols, although with a revisited outcome and also rationalised with DFT calculations. The 2-naphthyl substituted glucose-based spiro-oxathiazole 5h, identified as one of the most potent GP inhibitors (Ki = 160 nM against RMGPb) could be produced on the gram-scale from this strategy. Further evaluation in vitro using rat and human hepatocytes demonstrated that compound 5h is a anti-hyperglycaemic drug candidates performing slightly better than DAB used as a positive control. Investigation in Zucker fa/fa rat model in acute and subchronic assays further confirmed the potency of compound 5h since it lowered blood glucose levels by ∼36% at 30 mg kg-1 and ∼43% at 60 mg kg-1. The present study is one of the few in vivo investigations for glucose-based GP inhibitors and provides data in animal models for such drug candidates.
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Affiliation(s)
- David Goyard
- Institut de Chimie et Biochimie Moléculaires et Supramoléculaires, UMR 5246, CNRS, Université Claude Bernard Lyon 1, Bâtiment Lederer, 1 Rue Victor Grignard, F-69622 Villeurbanne, France.
| | - Bálint Kónya
- Department of Organic Chemistry, University of Debrecen, POB 400, H-4002 Debrecen, Hungary
| | - Katalin Czifrák
- Department of Organic Chemistry, University of Debrecen, POB 400, H-4002 Debrecen, Hungary
| | - Paolo Larini
- Institut de Chimie et Biochimie Moléculaires et Supramoléculaires, UMR 5246, CNRS, Université Claude Bernard Lyon 1, Bâtiment Lederer, 1 Rue Victor Grignard, F-69622 Villeurbanne, France.
| | - Fanny Demontrond
- Institut de Chimie et Biochimie Moléculaires et Supramoléculaires, UMR 5246, CNRS, Université Claude Bernard Lyon 1, Bâtiment Lederer, 1 Rue Victor Grignard, F-69622 Villeurbanne, France.
| | - Jérémy Leroy
- Montpellier University, EA7288, Biocommunication in cardiometabolism (BC2M), Montpellier, France
| | - Sophie Balzarin
- Montpellier University, EA7288, Biocommunication in cardiometabolism (BC2M), Montpellier, France
| | - Michel Tournier
- Montpellier University, EA7288, Biocommunication in cardiometabolism (BC2M), Montpellier, France
| | - Didier Tousch
- Montpellier University, EA7288, Biocommunication in cardiometabolism (BC2M), Montpellier, France
| | - Pierre Petit
- Montpellier University, EA7288, Biocommunication in cardiometabolism (BC2M), Montpellier, France
| | - Cédric Duret
- INSERM U1040, Montpellier, France and Montpellier University, UMR-1040, Montpellier, France
| | - Patrick Maurel
- INSERM U1040, Montpellier, France and Montpellier University, UMR-1040, Montpellier, France
| | - Tibor Docsa
- Institute of Medical Chemistry, University of Debrecen, POB 7, Nagyerdei krt. 98, H-4012 Debrecen, Hungary
| | - Pál Gergely
- Institute of Medical Chemistry, University of Debrecen, POB 7, Nagyerdei krt. 98, H-4012 Debrecen, Hungary
| | - László Somsák
- Department of Organic Chemistry, University of Debrecen, POB 400, H-4002 Debrecen, Hungary
| | - Jean-Pierre Praly
- Institut de Chimie et Biochimie Moléculaires et Supramoléculaires, UMR 5246, CNRS, Université Claude Bernard Lyon 1, Bâtiment Lederer, 1 Rue Victor Grignard, F-69622 Villeurbanne, France.
| | - Jacqueline Azay-Milhau
- Montpellier University, EA7288, Biocommunication in cardiometabolism (BC2M), Montpellier, France
| | - Sébastien Vidal
- Institut de Chimie et Biochimie Moléculaires et Supramoléculaires, UMR 5246, CNRS, Université Claude Bernard Lyon 1, Bâtiment Lederer, 1 Rue Victor Grignard, F-69622 Villeurbanne, France.
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4
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Kánya N, Kun S, Batta G, Somsák L. Glycosylation with ulosonates under Mitsunobu conditions: scope and limitations. NEW J CHEM 2020. [DOI: 10.1039/d0nj03044a] [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
Mitsunobu reactions on highly hindered tertiary type hydroxy groups of ulosonates: from 47 NuH compounds O-, N-, and S-nucleophiles gave the corresponding ulosidonates in 30–78% yields, while C-nucleophiles were unreactive.
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Affiliation(s)
- Nándor Kánya
- Department of Organic Chemistry
- University of Debrecen
- H-4002 Debrecen
- Hungary
| | - Sándor Kun
- Department of Organic Chemistry
- University of Debrecen
- H-4002 Debrecen
- Hungary
| | - Gyula Batta
- Department of Organic Chemistry
- University of Debrecen
- H-4002 Debrecen
- Hungary
| | - László Somsák
- Department of Organic Chemistry
- University of Debrecen
- H-4002 Debrecen
- Hungary
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5
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Szabó KE, Kyriakis E, Psarra AMG, Karra AG, Sipos Á, Docsa T, Stravodimos GA, Katsidou E, Skamnaki VT, Liggri PGV, Zographos SE, Mándi A, Király SB, Kurtán T, Leonidas DD, Somsák L. Glucopyranosylidene-spiro-imidazolinones, a New Ring System: Synthesis and Evaluation as Glycogen Phosphorylase Inhibitors by Enzyme Kinetics and X-ray Crystallography. J Med Chem 2019; 62:6116-6136. [PMID: 31251604 DOI: 10.1021/acs.jmedchem.9b00356] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
Epimeric series of aryl-substituted glucopyranosylidene-spiro-imidazolinones, an unprecedented new ring system, were synthesized from the corresponding Schiff bases of O-perbenzoylated (gluculopyranosylamine)onamides by intramolecular ring closure of the aldimine moieties with the carboxamide group elicited by N-bromosuccinimide in pyridine. Test compounds were obtained by Zemplén O-debenzoylation. Stereochemistry and ring tautomers of the new compounds were investigated by NMR, time-dependent density functional theory (TDDFT)-electronic circular dichroism, and DFT-NMR methods. Kinetic studies with rabbit muscle and human liver glycogen phosphorylases showed that the (R)-imidazolinones were 14-216 times more potent than the (S) epimers. The 2-naphthyl-substituted (R)-imidazolinone was the best inhibitor of the human enzyme (Ki 1.7 μM) and also acted on HepG2 cells (IC50 177 μM). X-ray crystallography revealed that only the (R) epimers bound in the crystal. Their inhibitory efficacy is based on the hydrogen-bonding interactions of the carbonyl oxygen and the NH of the imidazolinone ring.
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Affiliation(s)
- Katalin E Szabó
- Department of Organic Chemistry , University of Debrecen , P.O. Box 400, H-4002 Debrecen , Hungary
| | - Efthimios Kyriakis
- Department of Biochemistry and Biotechnology , University of Thessaly, Biopolis , 41500 Larissa , Greece
| | - Anna-Maria G Psarra
- Department of Biochemistry and Biotechnology , University of Thessaly, Biopolis , 41500 Larissa , Greece
| | - Aikaterini G Karra
- Department of Biochemistry and Biotechnology , University of Thessaly, Biopolis , 41500 Larissa , Greece
| | - Ádám Sipos
- Department of Medical Chemistry, Faculty of Medicine , University of Debrecen , Egyetem tér 1 , H-4032 Debrecen , Hungary
| | - Tibor Docsa
- Department of Medical Chemistry, Faculty of Medicine , University of Debrecen , Egyetem tér 1 , H-4032 Debrecen , Hungary
| | - George A Stravodimos
- Department of Biochemistry and Biotechnology , University of Thessaly, Biopolis , 41500 Larissa , Greece
| | - Elisabeth Katsidou
- Department of Biochemistry and Biotechnology , University of Thessaly, Biopolis , 41500 Larissa , Greece
| | - Vassiliki T Skamnaki
- Department of Biochemistry and Biotechnology , University of Thessaly, Biopolis , 41500 Larissa , Greece
| | - Panagiota G V Liggri
- Department of Biochemistry and Biotechnology , University of Thessaly, Biopolis , 41500 Larissa , Greece.,Institute of Biology, Pharmaceutical Chemistry and Biotechnology , National Hellenic Research Foundation , 48 Vassileos Constantinou Avenue , 11635 Athens , Greece
| | - Spyros E Zographos
- Institute of Biology, Pharmaceutical Chemistry and Biotechnology , National Hellenic Research Foundation , 48 Vassileos Constantinou Avenue , 11635 Athens , Greece
| | - Attila Mándi
- Department of Organic Chemistry , University of Debrecen , P.O. Box 400, H-4002 Debrecen , Hungary
| | - Sándor Balázs Király
- Department of Organic Chemistry , University of Debrecen , P.O. Box 400, H-4002 Debrecen , Hungary
| | - Tibor Kurtán
- Department of Organic Chemistry , University of Debrecen , P.O. Box 400, H-4002 Debrecen , Hungary
| | - Demetres D Leonidas
- Department of Biochemistry and Biotechnology , University of Thessaly, Biopolis , 41500 Larissa , Greece
| | - László Somsák
- Department of Organic Chemistry , University of Debrecen , P.O. Box 400, H-4002 Debrecen , Hungary
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6
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Kun S, Kánya N, Galó N, Páhi A, Mándi A, Kurtán T, Makleit P, Veres S, Sipos Á, Docsa T, Somsák L. Glucopyranosylidene-spiro-benzo[ b][1,4]oxazinones and -benzo[ b][1,4]thiazinones: Synthesis and Investigation of Their Effects on Glycogen Phosphorylase and Plant Growth Inhibition. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2019; 67:6884-6891. [PMID: 31135156 DOI: 10.1021/acs.jafc.9b00443] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Glucopyranosylidene-spiro-benzo[ b][1,4]oxazinones were obtained via the corresponding 2-nitrophenyl glycosides obtained by two methods: (a) AgOTf-promoted glycosylation of 2-nitrophenol derivatives by O-perbenzoylated methyl (α-d-gluculopyranosyl bromide)heptonate or (b) Mitsunobu-type reactions of O-perbenzoylated methyl (α-d-gluculopyranose)heptonate with bulky 2-nitrophenols in the presence of diethyl azodicarboxylate (DEAD) and PPh3. Catalytic hydrogenation (H2-Pd/C) or partial reduction (e.g., H2-Pd/C, pyridine) of the 2-nitro groups led to spiro-benzo[ b][1,4]oxazinones and spiro-benzo[ b][1,4]-4-hydroxyoxazinones by spontaneous ring closure of the intermediate 2-aminophenyl or 2-hydroxylamino glycosides, respectively. The analogous 2-aminophenyl thioglycosides, prepared by reactions of O-perbenzoylated methyl (α-d-gluculopyranosyl bromide)heptonate with 2-aminothiophenols, were cyclized in m-xylene at reflux temperature to the corresponding spiro-benzo[ b][1,4]thiazinones. O-Debenzoylation was effected by Zemplén transesterification in both series. Spiro-configurations were determined by NMR and electronic circular dichroism time-dependent density functional theory (ECD-TDDFT) methods. Inhibition assays with rabbit muscle glycogen phosphorylase b showed (1' R)-spiro{1',5'-anhydro-d-glucitol-1',2-benzo[ b][1,4]oxazin-3(4 H)-one} and (1' R)-spiro{1',5'-anhydro-d-glucitol-1',2-benzo[ b][1,4]thiazin-3(4 H)-one} to be the most efficient inhibitors (27 and 28% inhibition at 625 μM, respectively). Plant growth tests with white mustard and garden cress indicated no effect except for (1' R)-4-hydroxyspiro{1',5'-anhydro-d-glucitol-1',2-benzo[ b][1,4]oxazin-3(4 H)-one} with the latter plant to show modest inhibition of germination (95% relative to control).
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Affiliation(s)
- Sándor Kun
- Department of Organic Chemistry , University of Debrecen , POB 400 , H-4002 Debrecen , Hungary
| | - Nándor Kánya
- Department of Organic Chemistry , University of Debrecen , POB 400 , H-4002 Debrecen , Hungary
| | - Norbert Galó
- Department of Organic Chemistry , University of Debrecen , POB 400 , H-4002 Debrecen , Hungary
| | - András Páhi
- Department of Organic Chemistry , University of Debrecen , POB 400 , H-4002 Debrecen , Hungary
| | - Attila Mándi
- Department of Organic Chemistry , University of Debrecen , POB 400 , H-4002 Debrecen , Hungary
| | - Tibor Kurtán
- Department of Organic Chemistry , University of Debrecen , POB 400 , H-4002 Debrecen , Hungary
| | - Péter Makleit
- Department of Agricultural Botany, Crop Physiology and Biotechnology , University of Debrecen , Böszörményi út 138 , H-4032 Debrecen , Hungary
| | - Szilvia Veres
- Department of Agricultural Botany, Crop Physiology and Biotechnology , University of Debrecen , Böszörményi út 138 , H-4032 Debrecen , Hungary
| | - Ádám Sipos
- Department of Medical Chemistry, Faculty of Medicine , University of Debrecen , Egyetem tér 1 , H-4032 Debrecen , Hungary
| | - Tibor Docsa
- Department of Medical Chemistry, Faculty of Medicine , University of Debrecen , Egyetem tér 1 , H-4032 Debrecen , Hungary
| | - László Somsák
- Department of Organic Chemistry , University of Debrecen , POB 400 , H-4002 Debrecen , Hungary
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