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Novotná K, Tenora L, Prchalová E, Paule J, Alt J, Veeravalli V, Lam J, Wu Y, Šnajdr I, Gori S, Mettu VS, Tsukamoto T, Majer P, Slusher BS, Rais R. Discovery of tert-Butyl Ester Based 6-Diazo-5-oxo-l-norleucine Prodrugs for Enhanced Metabolic Stability and Tumor Delivery. J Med Chem 2023; 66:15493-15510. [PMID: 37949450 PMCID: PMC10683027 DOI: 10.1021/acs.jmedchem.3c01681] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2023] [Revised: 10/19/2023] [Accepted: 10/24/2023] [Indexed: 11/12/2023]
Abstract
The glutamine antagonist 6-diazo-5-oxo-l-norleucine (DON) exhibits remarkable anticancer efficacy; however, its therapeutic potential is hindered by its toxicity to gastrointestinal (GI) tissues. We recently reported the discovery of DRP-104, a tumor-targeted DON prodrug with excellent efficacy and tolerability, which is currently in clinical trials. However, DRP-104 exhibits limited aqueous solubility, and the instability of its isopropyl ester promoiety leads to the formation of an inactive M1-metabolite, reducing overall systemic prodrug exposure. Herein, we aimed to synthesize DON prodrugs with various ester and amide promoieties with improved solubility, GI stability, and DON tumor delivery. Twenty-one prodrugs were synthesized and characterized in stability and pharmacokinetics studies. Of these, P11, tert-butyl-(S)-6-diazo-2-((S)-2-(2-(dimethylamino)acetamido)-3-phenylpropanamido)-5-oxo-hexanoate, showed excellent metabolic stability in plasma and intestinal homogenate, high aqueous solubility, and high tumor DON exposures and preserved the ideal tumor-targeting profile of DRP-104. In conclusion, we report a new generation of glutamine antagonist prodrugs with improved physicochemical and pharmacokinetic attributes.
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Affiliation(s)
- Kateřina Novotná
- Johns
Hopkins Drug Discovery, Departments of Neurology, Psychiatry and Behavioral Sciences, Pharmacology and
Molecular Sciences, Neuroscience, Medicine, and Oncology, Johns Hopkins School of Medicine, Baltimore, Maryland 21205, United States
- Institute
of Organic Chemistry and Biochemistry v.v.i., Academy of Sciences
of the Czech Republic, Prague 160 00, Czech Republic
- Department
of Organic Chemistry, Faculty of Science, Charles University, Prague 128 00, Czech Republic
| | - Lukáš Tenora
- Johns
Hopkins Drug Discovery, Departments of Neurology, Psychiatry and Behavioral Sciences, Pharmacology and
Molecular Sciences, Neuroscience, Medicine, and Oncology, Johns Hopkins School of Medicine, Baltimore, Maryland 21205, United States
- Institute
of Organic Chemistry and Biochemistry v.v.i., Academy of Sciences
of the Czech Republic, Prague 160 00, Czech Republic
| | - Eva Prchalová
- Johns
Hopkins Drug Discovery, Departments of Neurology, Psychiatry and Behavioral Sciences, Pharmacology and
Molecular Sciences, Neuroscience, Medicine, and Oncology, Johns Hopkins School of Medicine, Baltimore, Maryland 21205, United States
- Institute
of Organic Chemistry and Biochemistry v.v.i., Academy of Sciences
of the Czech Republic, Prague 160 00, Czech Republic
| | - James Paule
- Johns
Hopkins Drug Discovery, Departments of Neurology, Psychiatry and Behavioral Sciences, Pharmacology and
Molecular Sciences, Neuroscience, Medicine, and Oncology, Johns Hopkins School of Medicine, Baltimore, Maryland 21205, United States
| | - Jesse Alt
- Johns
Hopkins Drug Discovery, Departments of Neurology, Psychiatry and Behavioral Sciences, Pharmacology and
Molecular Sciences, Neuroscience, Medicine, and Oncology, Johns Hopkins School of Medicine, Baltimore, Maryland 21205, United States
| | - Vijay Veeravalli
- Johns
Hopkins Drug Discovery, Departments of Neurology, Psychiatry and Behavioral Sciences, Pharmacology and
Molecular Sciences, Neuroscience, Medicine, and Oncology, Johns Hopkins School of Medicine, Baltimore, Maryland 21205, United States
| | - Jenny Lam
- Johns
Hopkins Drug Discovery, Departments of Neurology, Psychiatry and Behavioral Sciences, Pharmacology and
Molecular Sciences, Neuroscience, Medicine, and Oncology, Johns Hopkins School of Medicine, Baltimore, Maryland 21205, United States
| | - Ying Wu
- Johns
Hopkins Drug Discovery, Departments of Neurology, Psychiatry and Behavioral Sciences, Pharmacology and
Molecular Sciences, Neuroscience, Medicine, and Oncology, Johns Hopkins School of Medicine, Baltimore, Maryland 21205, United States
| | - Ivan Šnajdr
- Institute
of Organic Chemistry and Biochemistry v.v.i., Academy of Sciences
of the Czech Republic, Prague 160 00, Czech Republic
| | - Sadakatali Gori
- Johns
Hopkins Drug Discovery, Departments of Neurology, Psychiatry and Behavioral Sciences, Pharmacology and
Molecular Sciences, Neuroscience, Medicine, and Oncology, Johns Hopkins School of Medicine, Baltimore, Maryland 21205, United States
| | - Vijaya Saradhi Mettu
- Johns
Hopkins Drug Discovery, Departments of Neurology, Psychiatry and Behavioral Sciences, Pharmacology and
Molecular Sciences, Neuroscience, Medicine, and Oncology, Johns Hopkins School of Medicine, Baltimore, Maryland 21205, United States
| | - Takashi Tsukamoto
- Johns
Hopkins Drug Discovery, Departments of Neurology, Psychiatry and Behavioral Sciences, Pharmacology and
Molecular Sciences, Neuroscience, Medicine, and Oncology, Johns Hopkins School of Medicine, Baltimore, Maryland 21205, United States
| | - Pavel Majer
- Institute
of Organic Chemistry and Biochemistry v.v.i., Academy of Sciences
of the Czech Republic, Prague 160 00, Czech Republic
| | - Barbara S. Slusher
- Johns
Hopkins Drug Discovery, Departments of Neurology, Psychiatry and Behavioral Sciences, Pharmacology and
Molecular Sciences, Neuroscience, Medicine, and Oncology, Johns Hopkins School of Medicine, Baltimore, Maryland 21205, United States
| | - Rana Rais
- Johns
Hopkins Drug Discovery, Departments of Neurology, Psychiatry and Behavioral Sciences, Pharmacology and
Molecular Sciences, Neuroscience, Medicine, and Oncology, Johns Hopkins School of Medicine, Baltimore, Maryland 21205, United States
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2
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Peters DE, Norris LD, Tenora L, Šnajdr I, Ponti AK, Zhu X, Sakamoto S, Veeravalli V, Pradhan M, Alt J, Thomas AG, Majer P, Rais R, McDonald C, Slusher BS. A gut-restricted glutamate carboxypeptidase II inhibitor reduces monocytic inflammation and improves preclinical colitis. Sci Transl Med 2023; 15:eabn7491. [PMID: 37556558 PMCID: PMC10661206 DOI: 10.1126/scitranslmed.abn7491] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2021] [Accepted: 07/21/2023] [Indexed: 08/11/2023]
Abstract
There is an urgent need to develop therapeutics for inflammatory bowel disease (IBD) because up to 40% of patients with moderate-to-severe IBD are not adequately controlled with existing drugs. Glutamate carboxypeptidase II (GCPII) has emerged as a promising therapeutic target. This enzyme is minimally expressed in normal ileum and colon, but it is markedly up-regulated in biopsies from patients with IBD and preclinical colitis models. Here, we generated a class of GCPII inhibitors designed to be gut-restricted for oral administration, and we interrogated efficacy and mechanism using in vitro and in vivo models. The lead inhibitor, (S)-IBD3540, was potent (half maximal inhibitory concentration = 4 nanomolar), selective, gut-restricted (AUCcolon/plasma > 50 in mice with colitis), and efficacious in acute and chronic rodent colitis models. In dextran sulfate sodium-induced colitis, oral (S)-IBD3540 inhibited >75% of colon GCPII activity, dose-dependently improved gross and histologic disease, and markedly attenuated monocytic inflammation. In spontaneous colitis in interleukin-10 (IL-10) knockout mice, once-daily oral (S)-IBD3540 initiated after disease onset improved disease, normalized colon histology, and attenuated inflammation as evidenced by reduced fecal lipocalin 2 and colon pro-inflammatory cytokines/chemokines, including tumor necrosis factor-α and IL-17. Using primary human colon epithelial air-liquid interface monolayers to interrogate the mechanism, we further found that (S)-IBD3540 protected against submersion-induced oxidative stress injury by decreasing barrier permeability, normalizing tight junction protein expression, and reducing procaspase-3 activation. Together, this work demonstrated that local inhibition of dysregulated gastrointestinal GCPII using the gut-restricted, orally active, small-molecule (S)-IBD3540 is a promising approach for IBD treatment.
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Affiliation(s)
- Diane E. Peters
- Johns Hopkins Drug Discovery, Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA
- Department of Molecular and Comparative Pathobiology, Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA
- Department of Pharmacology and Molecular Sciences, Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA
| | - Lauren D. Norris
- Johns Hopkins Drug Discovery, Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA
| | - Lukáš Tenora
- Institute of Organic Chemistry and Biochemistry, Academy of Sciences of the Czech Republic, 160 00 Prague, Czechia
| | - Ivan Šnajdr
- Institute of Organic Chemistry and Biochemistry, Academy of Sciences of the Czech Republic, 160 00 Prague, Czechia
| | - András K. Ponti
- Department of Inflammation and Immunity, Lerner Research Institute, Cleveland Clinic, Cleveland, OH 44195, USA
| | - Xiaolei Zhu
- Department of Psychiatry and Behavioral Sciences, Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA
| | - Shinji Sakamoto
- Department of Psychiatry and Behavioral Sciences, Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA
| | - Vijayabhaskar Veeravalli
- Johns Hopkins Drug Discovery, Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA
| | - Manisha Pradhan
- Johns Hopkins Drug Discovery, Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA
- Department of Pharmacology and Molecular Sciences, Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA
| | - Jesse Alt
- Johns Hopkins Drug Discovery, Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA
- Department of Neurology, Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA
| | - Ajit G. Thomas
- Johns Hopkins Drug Discovery, Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA
- Department of Neurology, Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA
| | - Pavel Majer
- Institute of Organic Chemistry and Biochemistry, Academy of Sciences of the Czech Republic, 160 00 Prague, Czechia
| | - Rana Rais
- Johns Hopkins Drug Discovery, Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA
- Department of Pharmacology and Molecular Sciences, Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA
- Department of Neurology, Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA
| | - Christine McDonald
- Department of Inflammation and Immunity, Lerner Research Institute, Cleveland Clinic, Cleveland, OH 44195, USA
| | - Barbara S. Slusher
- Johns Hopkins Drug Discovery, Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA
- Department of Pharmacology and Molecular Sciences, Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA
- Department of Psychiatry and Behavioral Sciences, Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA
- Department of Neurology, Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA
- Department of Neuroscience, Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA
- Department of Medicine, Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA
- Department of Oncology, Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA
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3
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Motlová L, Šnajdr I, Kutil Z, Andris E, Ptáček J, Novotná A, Nováková Z, Havlínová B, Tueckmantel W, Dráberová H, Majer P, Schutkowski M, Kozikowski A, Rulíšek L, Bařinka C. Comprehensive Mechanistic View of the Hydrolysis of Oxadiazole-Based Inhibitors by Histone Deacetylase 6 (HDAC6). ACS Chem Biol 2023. [PMID: 37392419 PMCID: PMC10367051 DOI: 10.1021/acschembio.3c00212] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/03/2023]
Abstract
Histone deacetylase (HDAC) inhibitors used in the clinic typically contain a hydroxamate zinc-binding group (ZBG). However, more recent work has shown that the use of alternative ZBGs, and, in particular, the heterocyclic oxadiazoles, can confer higher isoenzyme selectivity and more favorable ADMET profiles. Herein, we report on the synthesis and biochemical, crystallographic, and computational characterization of a series of oxadiazole-based inhibitors selectively targeting the HDAC6 isoform. Surprisingly, but in line with a very recent finding reported in the literature, a crystal structure of the HDAC6/inhibitor complex revealed that hydrolysis of the oxadiazole ring transforms the parent oxadiazole into an acylhydrazide through a sequence of two hydrolytic steps. An identical cleavage pattern was also observed both in vitro using the purified HDAC6 enzyme as well as in cellular systems. By employing advanced quantum and molecular mechanics (QM/MM) and QM calculations, we elucidated the mechanistic details of the two hydrolytic steps to obtain a comprehensive mechanistic view of the double hydrolysis of the oxadiazole ring. This was achieved by fully characterizing the reaction coordinate, including identification of the structures of all intermediates and transition states, together with calculations of their respective activation (free) energies. In addition, we ruled out several (intuitively) competing pathways. The computed data (ΔG‡ ≈ 21 kcal·mol-1 for the rate-determining step of the overall dual hydrolysis) are in very good agreement with the experimentally determined rate constants, which a posteriori supports the proposed reaction mechanism. We also clearly (and quantitatively) explain the role of the -CF3 or -CHF2 substituent on the oxadiazole ring, which is a prerequisite for hydrolysis to occur. Overall, our data provide compelling evidence that the oxadiazole warheads can be efficiently transformed within the active sites of target metallohydrolases to afford reaction products possessing distinct selectivity and inhibition profiles.
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Affiliation(s)
- Lucia Motlová
- Institute of Biotechnology of the Czech Academy of Sciences, BIOCEV, Prumyslova 595, 252 50 Vestec, Czech Republic
| | - Ivan Šnajdr
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences, Flemingovo náměstí 2, 166 10 Prague 6, Czech Republic
| | - Zsófia Kutil
- Institute of Biotechnology of the Czech Academy of Sciences, BIOCEV, Prumyslova 595, 252 50 Vestec, Czech Republic
| | - Erik Andris
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences, Flemingovo náměstí 2, 166 10 Prague 6, Czech Republic
| | - Jakub Ptáček
- Institute of Biotechnology of the Czech Academy of Sciences, BIOCEV, Prumyslova 595, 252 50 Vestec, Czech Republic
| | - Adéla Novotná
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences, Flemingovo náměstí 2, 166 10 Prague 6, Czech Republic
| | - Zora Nováková
- Institute of Biotechnology of the Czech Academy of Sciences, BIOCEV, Prumyslova 595, 252 50 Vestec, Czech Republic
| | - Barbora Havlínová
- Institute of Biotechnology of the Czech Academy of Sciences, BIOCEV, Prumyslova 595, 252 50 Vestec, Czech Republic
| | - Werner Tueckmantel
- StarWise Therapeutics LLC, University Research Park, Inc., Madison, Wisconsin 53719, United States
| | - Helena Dráberová
- Institute of Biotechnology of the Czech Academy of Sciences, BIOCEV, Prumyslova 595, 252 50 Vestec, Czech Republic
| | - Pavel Majer
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences, Flemingovo náměstí 2, 166 10 Prague 6, Czech Republic
| | - Mike Schutkowski
- Department of Enzymology, Charles Tanford Protein Center, Institute of Biochemistry and Biotechnology, Martin-Luther-University Halle-Wittenberg, 06120 Halle, Germany
| | - Alan Kozikowski
- StarWise Therapeutics LLC, University Research Park, Inc., Madison, Wisconsin 53719, United States
| | - Lubomír Rulíšek
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences, Flemingovo náměstí 2, 166 10 Prague 6, Czech Republic
| | - Cyril Bařinka
- Institute of Biotechnology of the Czech Academy of Sciences, BIOCEV, Prumyslova 595, 252 50 Vestec, Czech Republic
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4
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Šnajdr I, Froese J, Dudding T, Horáková P, Hudlický T. Investigation of a new chiral auxiliary derived chemoenzymatically from toluene: experimental and computational study. CAN J CHEM 2016. [DOI: 10.1139/cjc-2016-0327] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
A tricyclic chiral auxiliary, prepared from the enzymatically derived cis-arene dihydrodiol metabolite of toluene, was investigated as a means of asymmetric induction in several different reactions. The auxiliary was converted to an oxaziridine, and its utility in hydroxylation, providing low levels of enantiomeric excess, was compared with that of Davis’s oxaziridine. Insight into the origin of stereoinduction in this reaction is provided and is based on computational Monte Carlo Multiple Minimum (MCMM) searches using the OPLS3 force field. The use of the auxiliary group in the alkylation of appended esters proved disappointing. Diels-Alder cycloaddition of an acrylate, derived from the auxiliary group, with cyclohexadiene furnished a mixture of diastereomeric adducts in essentially equal amounts. The adducts were separated and the corresponding enantiomeric residues were isolated with good enantiomeric excess. Evidence of reasonable levels of asymmetric induction in the above processes was lacking. Experimental and spectral data are provided for all key compounds.
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Affiliation(s)
- Ivan Šnajdr
- Department of Chemistry and Centre for Biotechnology, Brock University, St. Catharines, ON L2S 3A1, Canada
- Department of Chemistry and Centre for Biotechnology, Brock University, St. Catharines, ON L2S 3A1, Canada
| | - Jordan Froese
- Department of Chemistry and Centre for Biotechnology, Brock University, St. Catharines, ON L2S 3A1, Canada
- Department of Chemistry and Centre for Biotechnology, Brock University, St. Catharines, ON L2S 3A1, Canada
| | - Travis Dudding
- Department of Chemistry and Centre for Biotechnology, Brock University, St. Catharines, ON L2S 3A1, Canada
- Department of Chemistry and Centre for Biotechnology, Brock University, St. Catharines, ON L2S 3A1, Canada
| | - Pavlína Horáková
- Department of Chemistry and Centre for Biotechnology, Brock University, St. Catharines, ON L2S 3A1, Canada
- Department of Chemistry and Centre for Biotechnology, Brock University, St. Catharines, ON L2S 3A1, Canada
| | - Tomáš Hudlický
- Department of Chemistry and Centre for Biotechnology, Brock University, St. Catharines, ON L2S 3A1, Canada
- Department of Chemistry and Centre for Biotechnology, Brock University, St. Catharines, ON L2S 3A1, Canada
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Šnajdr I, Parkan K, Hessler F, Kotora M. Cross-metathesis reaction of α- and β-vinyl C-glycosides with alkenes. Beilstein J Org Chem 2015; 11:1392-7. [PMID: 26425194 PMCID: PMC4578437 DOI: 10.3762/bjoc.11.150] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2015] [Accepted: 07/20/2015] [Indexed: 12/20/2022] Open
Abstract
Cross-metathesis of α- and β-vinyl C-deoxyribosides and α-vinyl C-galactoside with various terminal alkenes under different conditions was studied. The cross-metathesis of the former proceeded with good yields of the corresponding products in ClCH2CH2Cl the latter required the presence of CuI in CH2Cl2 to achieve good yields of the products. A simple method for the preparation of α- and β-vinyl C-deoxyribosides was also developed. In addition, feasibility of deprotection and further transformations were briefly explored.
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Affiliation(s)
- Ivan Šnajdr
- Department of Organic Chemistry, Charles University in Prague, Hlavova 8, 153 00 Praha 2, Czech Republic
| | - Kamil Parkan
- Department of Chemistry of Natural Compounds, University of Chemistry and Technology, Prague, Technická 5, 160 00 Praha 6, Czech Republic
| | - Filip Hessler
- Department of Organic Chemistry, Charles University in Prague, Hlavova 8, 153 00 Praha 2, Czech Republic
| | - Martin Kotora
- Department of Organic Chemistry, Charles University in Prague, Hlavova 8, 153 00 Praha 2, Czech Republic
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Murphy B, Šnajdr I, Machara A, Endoma-Arias MAA, Stamatatos TC, Cox DP, Hudlický T. Conversion of Thebaine to Oripavine and Other Useful Intermediates for the Semisynthesis of Opiate-Derived Agents: Synthesis of Hydromorphone. Adv Synth Catal 2014. [DOI: 10.1002/adsc.201400445] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Šnajdr I, Janoušek Z, Takagaki M, Císařová I, Hosmane NS, Kotora M. Alpha (α-) and beta (β-carboranyl-C-deoxyribosides: syntheses, structures and biological evaluation. Eur J Med Chem 2014; 83:389-97. [PMID: 24980120 DOI: 10.1016/j.ejmech.2014.06.005] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2013] [Revised: 11/27/2013] [Accepted: 06/03/2014] [Indexed: 10/25/2022]
Abstract
The syntheses of the unprotected neutral closo-carboranyl-C-deoxyriboses, starting from anomeric mixture of 1-ethynyldeoxyriboses, and their corresponding open-cage nido-derivatives have been described. The structures of both the α- and β-anomers were confirmed by single-crystal X-ray diffraction. While limited water solubility of the neutral closo-anomers led to high cytotoxicity, their cesium salts (nido-species) exhibited higher water solubility leading to lower cytotoxicity. However, in vitro boron neutron capture therapy (BNCT) investigation using the murine squamous cell carcinoma (SCCVII) cell lines showed that there are no significant differences between the survival fractions of the two species.
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Affiliation(s)
- Ivan Šnajdr
- Department of Organic Chemistry, Charles University in Prague, Hlavova 8, 153 00 Praha 2, Czech Republic
| | - Zbyněk Janoušek
- Institute of Organic Chemistry and Biochemistry, Czech Academy of Sciences, Flemingovo nám. 2, 166 10 Praha 6, Czech Republic
| | - Masao Takagaki
- Graduate School of Human & Environmental Studies, Kyoto University, Nihonmatsu, Yoshida, Sakyo-ku, Kyoto 606-8501, Japan
| | - Ivana Císařová
- Department of Inorganic Chemistry, Charles University in Prague, Hlavova 8, 153 00 Praha 2, Czech Republic
| | - Narayan S Hosmane
- Department of Chemistry & Biochemistry, Northern Illinois University, DeKalb, IL 60115-2862, USA
| | - Martin Kotora
- Department of Organic Chemistry, Charles University in Prague, Hlavova 8, 153 00 Praha 2, Czech Republic; Institute of Organic Chemistry and Biochemistry, Czech Academy of Sciences, Flemingovo nám. 2, 166 10 Praha 6, Czech Republic.
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Korotvička A, Šnajdr I, Štěpnička P, Císařová I, Janoušek Z, Kotora M. Synthesis, Molecular Structure, and Electrochemistry of 1-Ferrocenyl-1,2-dicarba-closo-dodecaboranes. Eur J Inorg Chem 2013. [DOI: 10.1002/ejic.201300110] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Pavlík J, Šnajdr I, Kuneš J, Špulák M, Pour M. A Short Entry to α-Substituted γ-Alkylidene Pentenolides. Synthesis and Preliminary Biological Evaluation of Novel Gelastatin Analogues. J Org Chem 2008; 74:703-9. [DOI: 10.1021/jo802082t] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Jan Pavlík
- Centre for New Antivirals and Antineoplastics, Department of Inorganic and Organic Chemistry, Charles University, Faculty of Pharmacy, Heyrovského 1203, CZ-500 05 Hradec Králové, Czech Republic
| | - Ivan Šnajdr
- Centre for New Antivirals and Antineoplastics, Department of Inorganic and Organic Chemistry, Charles University, Faculty of Pharmacy, Heyrovského 1203, CZ-500 05 Hradec Králové, Czech Republic
| | - Jiří Kuneš
- Centre for New Antivirals and Antineoplastics, Department of Inorganic and Organic Chemistry, Charles University, Faculty of Pharmacy, Heyrovského 1203, CZ-500 05 Hradec Králové, Czech Republic
| | - Marcel Špulák
- Centre for New Antivirals and Antineoplastics, Department of Inorganic and Organic Chemistry, Charles University, Faculty of Pharmacy, Heyrovského 1203, CZ-500 05 Hradec Králové, Czech Republic
| | - Milan Pour
- Centre for New Antivirals and Antineoplastics, Department of Inorganic and Organic Chemistry, Charles University, Faculty of Pharmacy, Heyrovského 1203, CZ-500 05 Hradec Králové, Czech Republic
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Šnajdr I, Pavlík J, Schiller R, Kuneš J, Pour M. Pentenolide Analogues of Antifungal Butenolides: Strategies Towards 3,6-Disubstituted Pyranones and Unexpected Loss of Biological Effect. ACTA ACUST UNITED AC 2007. [DOI: 10.1135/cccc20071472] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Pentenolide analogues of antifungal 3,5-disubstituted butenolides were prepared by oxidative cyclization of 2-(substituted aryl)hex-5-enoic acids as the key step. Given the limitations of the methodology, another approach to the title compounds based on the Pd-catalyzed carbonylative lactonization of 4-iodo-3-en-1-ols was developed, and the carbonylation conditions were optimized. While the former sequence allows only the introduction of a substituted methyl at C6, pyranones bearing a range of various C-substituents at C6 can be prepared by the latter. Somewhat surprisingly, unlike the corresponding butenolides with the same substitution pattern, the title pentenolides possess no antifungal or cytostatic activity.
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