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Duncan NS, Campbell MJ, Backos DS, Li C, Rider KC, Stump S, Weaver MJ, Gajewski MP, Beall HD, Reigan P, Natale NR. 10-Alkoxy-anthracenyl-isoxazole analogs have sub-micromolar activity against a Glioblastoma multiforme cell line. Bioorg Med Chem 2022; 69:116911. [DOI: 10.1016/j.bmc.2022.116911] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2022] [Revised: 06/23/2022] [Accepted: 06/25/2022] [Indexed: 11/02/2022]
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2
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Li C, Weaver MJ, Campbell MJ, Natale NR. Syntheses and crystal structures of a nitro–anthracene–isoxazole and its oxidation product. Acta Crystallogr E Crystallogr Commun 2022; 78:703-708. [PMID: 35855371 PMCID: PMC9260358 DOI: 10.1107/s2056989022005710] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2022] [Accepted: 05/25/2022] [Indexed: 12/04/2022]
Abstract
The title compounds arose as unexpected by-products of an iodination reaction: in each case the fused-ring and isoxazole planes are almost perpendicular to each other. The syntheses and structures of an unexpected by-product from an iodination reaction, namely, ethyl 5-methyl-3-(10-nitroanthracen-9-yl)isoxazole-4-carboxylate, C21H16N2O5, (I), and its oxidation product, ethyl 3-(9-hydroxy-10-oxo-9,10-dihydroanthracen-9-yl)-5-methylisoxazole-4-carboxylate, C21H17NO5 (V) are described. Compound (I) crystallizes with two molecules in the asymmetric unit in which the dihedral angles between the anthracene fused-ring systems and isoxazole ring mean planes are 88.67 (16) and 85.64 (16)°; both molecules feature a disordered nitro group. In (V), which crystallizes with one molecule in the asymmetric unit, the equivalent dihedral angle between the almost planar anthrone ring system (r.m.s. deviation = 0.029 Å) and the pendant isoxazole ring is 89.65 (5)°. In the crystal of (I), the molecules are linked by weak C—H⋯O interactions into a three-dimensional network and in the extended structure of (V), inversion dimers linked by pairwise O—H⋯O hydrogen bonds generate R22(14) loops.
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3
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Saigal, Khizr M, Sahoo SC, Khan MM. Synthesis, characterization, X-ray crystallographic study and in silico ADME predictions of functionalized nitropyrrole derivatives. J Mol Struct 2022. [DOI: 10.1016/j.molstruc.2021.131655] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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4
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Weaver MJ, Campbell MJ, Li C, Natale NR. Ethyl 5-methyl-3-[11-(pyridin-2-yl)-6,11-di-hydro-6,11-ep-oxy-dibenzo[ b, e]oxepin-6-yl]isoxazole-4-carboxylate: a bicyclic acetal from the rearrangement of an anthracenyl isoxazole. Acta Crystallogr E Crystallogr Commun 2020; 76:1818-1822. [PMID: 33520260 PMCID: PMC7784648 DOI: 10.1107/s2056989020014358] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2020] [Accepted: 10/28/2020] [Indexed: 12/05/2022]
Abstract
The title compound, C26H20N2O5, is a rearrangement product of an o-pyridinyl anthracenyl isoxazole ester. It features a bicyclic acetal structure, which has two extended almost co-planar ring systems, which subtend a fold angle of 102.17 (5)°. In the crystal, the mol-ecules are closely knitted together through C-H⋯N and C-H⋯O hydrogen bonds and form chains of alternating enanti-omers propagating along the c-axis direction.
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Affiliation(s)
- Matthew J. Weaver
- Department of Biomedical & Pharmaceutical Sciences, University of Montana, Missoula, MT 59812, USA
| | - Michael J. Campbell
- Department of Biomedical & Pharmaceutical Sciences, University of Montana, Missoula, MT 59812, USA
| | - Chun Li
- Department of Chemistry, Ithaca College, 953 Danby Road, Ithaca, NY 14850, USA
| | - Nicholas R. Natale
- Department of Biomedical & Pharmaceutical Sciences, University of Montana, Missoula, MT 59812, USA
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Weaver MJ, Stump S, Campbell MJ, Backos DS, Li C, Reigan P, Adams E, Beall HD, Natale NR. 10-N-heterocylic aryl-isoxazole-amides (AIMs) have robust anti-tumor activity against breast and brain cancer cell lines and useful fluorescence properties. Bioorg Med Chem 2020; 28:115781. [PMID: 33038788 DOI: 10.1016/j.bmc.2020.115781] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2020] [Revised: 08/11/2020] [Accepted: 09/17/2020] [Indexed: 10/23/2022]
Abstract
A novel series of anthracenyl-isoxazole amide (AIM) antitumor agents containing N-heterocycles in the 10 position (N-het) were synthesized using palladium cross-coupling. The unique steric environment of the N-het-AIMs required individual optimization in each case. Lanthanide mediated double activation was used to couple the dimethylamino pyrrole moiety, required for antitumor action. Robust antitumor activity was observed against breast and brain cancer cell lines. The compounds were docked with the c-myc oncogene promoter sequence, which adopts a G4 quadruplex DNA conformation, and represents the working hypothesis for biological action. The N-het-AIMs have useful fluorescence properties, allowing for observation of their distribution within tumor cells.
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Affiliation(s)
- Matthew J Weaver
- Department of Biomedical & Pharmaceutical Sciences, University of Montana, Missoula, MT 59812, United States; Elite One Source, Nutritional Services, 1001 South 3rd, WestMissoula, MT 59801, United States(1)
| | - Sascha Stump
- Department of Biomedical & Pharmaceutical Sciences, University of Montana, Missoula, MT 59812, United States
| | - Michael J Campbell
- Department of Biomedical & Pharmaceutical Sciences, University of Montana, Missoula, MT 59812, United States
| | - Donald S Backos
- Skaggs School of Pharmacy and Pharmaceutical Sciences, Anschutz Medical Campus, University of Colorado, Aurora, CO 80045, United States
| | - Chun Li
- Department of Chemistry, Ithaca College, 953 Danby Road, Ithaca, NY 14850, United States
| | - Philip Reigan
- Skaggs School of Pharmacy and Pharmaceutical Sciences, Anschutz Medical Campus, University of Colorado, Aurora, CO 80045, United States
| | - Earle Adams
- Department of Chemistry and Biochemistry, University of Montana, Missoula, MT 59812, United States
| | - Howard D Beall
- Department of Biomedical & Pharmaceutical Sciences, University of Montana, Missoula, MT 59812, United States
| | - Nicholas R Natale
- Department of Biomedical & Pharmaceutical Sciences, University of Montana, Missoula, MT 59812, United States.
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Carabet LA, Rennie PS, Cherkasov A. Therapeutic Inhibition of Myc in Cancer. Structural Bases and Computer-Aided Drug Discovery Approaches. Int J Mol Sci 2018; 20:E120. [PMID: 30597997 PMCID: PMC6337544 DOI: 10.3390/ijms20010120] [Citation(s) in RCA: 101] [Impact Index Per Article: 16.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2018] [Revised: 12/08/2018] [Accepted: 12/21/2018] [Indexed: 12/23/2022] Open
Abstract
Myc (avian myelocytomatosis viral oncogene homolog) represents one of the most sought after drug targets in cancer. Myc transcription factor is an essential regulator of cell growth, but in most cancers it is overexpressed and associated with treatment-resistance and lethal outcomes. Over 40 years of research and drug development efforts did not yield a clinically useful Myc inhibitor. Drugging the "undruggable" is problematic, as Myc inactivation may negatively impact its physiological functions. Moreover, Myc is a disordered protein that lacks effective binding pockets on its surface. It is well established that the Myc function is dependent on dimerization with its obligate partner, Max (Myc associated factor X), which together form a functional DNA-binding domain to activate genomic targets. Herein, we provide an overview of the knowledge accumulated to date on Myc regulation and function, its critical role in cancer, and summarize various strategies that are employed to tackle Myc-driven malignant transformation. We focus on important structure-function relationships of Myc with its interactome, elaborating structural determinants of Myc-Max dimer formation and DNA recognition exploited for therapeutic inhibition. Chronological development of small-molecule Myc-Max prototype inhibitors and corresponding binding sites are comprehensively reviewed and particular emphasis is placed on modern computational drug design methods. On the outlook, technological advancements may soon provide the so long-awaited Myc-Max clinical candidate.
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Affiliation(s)
- Lavinia A Carabet
- Vancouver Prostate Centre, University of British Columbia, 2660 Oak Street, Vancouver, BC V6H 3Z6, Canada.
| | - Paul S Rennie
- Vancouver Prostate Centre, University of British Columbia, 2660 Oak Street, Vancouver, BC V6H 3Z6, Canada.
| | - Artem Cherkasov
- Vancouver Prostate Centre, University of British Columbia, 2660 Oak Street, Vancouver, BC V6H 3Z6, Canada.
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7
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Toche RB, Patil VM, Chaudhari (Patil) SA, Chavan SM, Sabnis RW. Green Synthesis of Pyrazole and Oxazole Derivatives. J Heterocycl Chem 2018. [DOI: 10.1002/jhet.3360] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
- Raghunath B. Toche
- Organic Chemistry Research Centre, Department of ChemistryK.R.T. Arts, B.H. Commerce & A.M. Science College Gangapur Road Nashik 422002 Maharashtra India
| | - Vasant M. Patil
- Organic Chemistry Research Centre, Department of ChemistryK.R.T. Arts, B.H. Commerce & A.M. Science College Gangapur Road Nashik 422002 Maharashtra India
| | - Sunita A. Chaudhari (Patil)
- Organic Chemistry Research Centre, Department of ChemistryK.R.T. Arts, B.H. Commerce & A.M. Science College Gangapur Road Nashik 422002 Maharashtra India
- Regional Forensic Science Laboratory, Home Department Opposite Vidyut Nagar, Dindori Road Nashik 422004 India
| | - Satish M. Chavan
- Organic Chemistry Research Centre, Department of ChemistryK.R.T. Arts, B.H. Commerce & A.M. Science College Gangapur Road Nashik 422002 Maharashtra India
- Department of ChemistryR.N.C. Arts, J.D.B. Commerce & N.S.C. Science College Nashik Road Nashik 422101 Maharashtra India
| | - Ram W. Sabnis
- Patent Law DepartmentGeorgia‐Pacific LLC 133 Peachtree Street NE Atlanta GA 30303 USA
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Stump S, Mou TC, Sprang SR, Natale NR, Beall HD. Crystal structure of the major quadruplex formed in the promoter region of the human c-MYC oncogene. PLoS One 2018; 13:e0205584. [PMID: 30312328 PMCID: PMC6185859 DOI: 10.1371/journal.pone.0205584] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2018] [Accepted: 09/27/2018] [Indexed: 12/11/2022] Open
Abstract
The c-MYC oncogene mediates multiple tumor cell survival pathways and is dysregulated or overexpressed in the majority of human cancers. The NHE III1 region of the c-MYC promoter forms a DNA quadruplex. Stabilization of this structure with small molecules has been shown to reduce expression of c-MYC, and targeting the c-MYC quadruplex has become an emerging strategy for development of antitumor compounds. Previous solution NMR studies of the c-MYC quadruplex have assigned the major conformer and topology of this important target, however, regions outside the G-quartet core were not as well-defined. Here, we report a high-resolution crystal structure (2.35 Å) of the major quadruplex formed in the NHE III1 region of the c-MYC promoter. The crystal structure is in general agreement with the solution NMR structure, however, key differences are observed in the position of nucleotides outside the G-quartet core. The crystal structure provides an alternative model that, along with comparisons to other reported quadruplex crystal structures, will be important to the rational design of selective compounds. This work will aid in development of ligands to target the c-MYC promoter quadruplex with the goal of creating novel anticancer therapies.
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Affiliation(s)
- Sascha Stump
- Center for Environmental Health Sciences, Department of Biomedical and Pharmaceutical Sciences, University of Montana, Missoula, Montana, United States of America
| | - Tung-Chung Mou
- Center for Biomolecular Structure and Dynamics, Division of Biological Sciences, University of Montana, Missoula, Montana, United States of America
| | - Stephen R. Sprang
- Center for Biomolecular Structure and Dynamics, Division of Biological Sciences, University of Montana, Missoula, Montana, United States of America
| | - Nicholas R. Natale
- Center for Environmental Health Sciences, Department of Biomedical and Pharmaceutical Sciences, University of Montana, Missoula, Montana, United States of America
| | - Howard D. Beall
- Center for Environmental Health Sciences, Department of Biomedical and Pharmaceutical Sciences, University of Montana, Missoula, Montana, United States of America
- * E-mail:
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10
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Balachandra B, Shanmugam S. A Simple and Direct Synthesis of Pentasubstituted Pyrroles via [3+4] Annulation and Their In Vitro Evaluation as Thrombolytic Agents and Cytotoxicity Studies on L929 Cells. ChemistrySelect 2018. [DOI: 10.1002/slct.201702476] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Affiliation(s)
- Biguvu Balachandra
- Department of Organic Chemistry; School of Chemistry; Madurai Kamaraj University; Madurai - 625021
| | - Sivakumar Shanmugam
- Department of Organic Chemistry; School of Chemistry; Madurai Kamaraj University; Madurai - 625021
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11
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Pavitha P, Prashanth J, Ramu G, Ramesh G, Mamatha K, Venkatram Reddy B. Synthesis, structural, spectroscopic, anti-cancer and molecular docking studies on novel 2-[(Anthracene-9-ylmethylene)amino]-2-methylpropane-1,3-diol using XRD, FTIR, NMR, UV–Vis spectra and DFT. J Mol Struct 2017. [DOI: 10.1016/j.molstruc.2017.06.095] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
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12
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Weaver MJ, Kearns AK, Stump S, Li C, Gajewski MP, Rider KC, Backos DS, Reigan PR, Beall HD, Natale NR. AIMing towards improved antitumor efficacy. Bioorg Med Chem Lett 2015; 25:1765-1770. [PMID: 25782743 PMCID: PMC4599781 DOI: 10.1016/j.bmcl.2015.02.063] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2014] [Revised: 02/20/2015] [Accepted: 02/23/2015] [Indexed: 11/30/2022]
Abstract
Using the structure-activity relationship emerging from previous Letter, and guided by pharmacokinetic properties, new AIMs have been prepared with both improved efficacy against human glioblastoma cells and cell permeability as determined by fluorescent confocal microscopy. We present our first unambiguous evidence for telomeric G4-forming oligonucleotide anisotropy by NMR resulting from direct interaction with AIMs, which is consistent with both our G4 melting studies by CD, and our working hypothesis. Finally, we show that AIMs induce apoptosis in SNB-19 cells.
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Affiliation(s)
- Matthew J Weaver
- Department of Biomedical and Pharmaceutical Sciences, University of Montana, Missoula, MT 59812, United States
| | - Alison K Kearns
- Department of Biomedical and Pharmaceutical Sciences, University of Montana, Missoula, MT 59812, United States
| | - Sascha Stump
- Department of Biomedical and Pharmaceutical Sciences, University of Montana, Missoula, MT 59812, United States
| | - Chun Li
- Department of Chemistry, Ithaca College, 953 Danby Road, Ithaca, NY 14850, United States
| | - Mariusz P Gajewski
- Department of Chemistry, Arkansas Tech University, Russellville, AR 72801, United States
| | - Kevin C Rider
- Department of Biomedical and Pharmaceutical Sciences, University of Montana, Missoula, MT 59812, United States
| | - Donald S Backos
- Skaggs School of Pharmacy and Pharmaceutical Sciences, Anschutz Medical Campus, University of Colorado Denver, Aurora, CO 80045, United States
| | - Philip R Reigan
- Skaggs School of Pharmacy and Pharmaceutical Sciences, Anschutz Medical Campus, University of Colorado Denver, Aurora, CO 80045, United States.
| | - Howard D Beall
- Department of Biomedical and Pharmaceutical Sciences, University of Montana, Missoula, MT 59812, United States.
| | - Nicholas R Natale
- Department of Biomedical and Pharmaceutical Sciences, University of Montana, Missoula, MT 59812, United States.
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13
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Duncan NS, Beall HD, Kearns AK, Li C, Natale NR. Ethyl 3-(9-chloro-10-oxo-9,10-di-hydro-anthracen-9-yl)-5-methyl-isoxazole-4-carboxyl-ate. Acta Crystallogr Sect E Struct Rep Online 2014; 70:o315-6. [PMID: 24765016 PMCID: PMC3998422 DOI: 10.1107/s1600536814003080] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2014] [Accepted: 02/10/2014] [Indexed: 11/10/2022]
Abstract
The asymmetric unit of the title compound, C21H16ClNO4, contains two independent mol-ecules (A and B), each adopting a conformation wherein the isoxazole ring is roughly orthogonal to the anthrone ring. The dihedral angle between the mean plane of the isoxazole (all atoms) and the mean plane of the anthrone (all atoms) is 88.48 (3)° in one mol-ecule and 89.92 (4)° in the other. The ester is almost coplanar with the isoxazole ring, with mean-plane dihedral angles of 2.48 (15) and 8.62 (5)°. In both mol-ecules, the distance between the ester carbonyl O atom and the anthrone ketone C atom is about 3.3 Å. The anthrone ring is virtually planar (r.m.s. deviations of 0.070 and 0.065 Å) and adopts a shallow boat conformation in each mol-ecule, as evidenced by the sum of the six intra-B-ring torsion angles [41.43 (15) and 34.38 (15)° for molecules A and B, respectively]. The closest separation between the benzene moieties of anthrones A and B is 5.1162 (7) Å, with an angle of 57.98 (5)°, consistent with an edge-to-face π-stacking inter-action. In the crystal, weak C-H⋯O and C-H⋯N inter-actions link the mol-ecules, forming a three-dimensional network.
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Affiliation(s)
- Nathan S Duncan
- Department of Pharmaceutical & Biomedical Science, The University of Montana, 32 Campus Drive, Missoula, MT 59812, USA
| | - Howard D Beall
- Department of Pharmaceutical & Biomedical Science, The University of Montana, 32 Campus Drive, Missoula, MT 59812, USA
| | - Alison K Kearns
- Department of Pharmaceutical & Biomedical Science, The University of Montana, 32 Campus Drive, Missoula, MT 59812, USA
| | - Chun Li
- Department of Chemistry, Ithaca College, 953 Danby Road, Ithaca, NY, 14850, USA
| | - Nicholas R Natale
- Department of Pharmaceutical & Biomedical Science, The University of Montana, 32 Campus Drive, Missoula, MT 59812, USA
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14
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Szabon-Watola MI, Ulatowski SV, George KM, Hayes CD, Steiger SA, Natale NR. Fluorescent probes of the isoxazole-dihydropyridine scaffold: MDR-1 binding and homology model. Bioorg Med Chem Lett 2013; 24:117-21. [PMID: 24342237 DOI: 10.1016/j.bmcl.2013.11.068] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2013] [Revised: 11/21/2013] [Accepted: 11/25/2013] [Indexed: 11/18/2022]
Abstract
Isoxazole-1,4-dihydropyridines (IDHPs) were tethered to fluorescent moieties using double activation via a lanthanide assisted Weinreb amidation. IDHP-fluorophore conjugate 3c exhibits the highest binding to date for IDHPs at the multidrug-resistance transporter (MDR-1), and IDHP-fluorophore conjugates 3c and 7 distribute selectively in SH-SY5Y cells. A homology model for IDHP binding at MDR-1 is presented which represents our current working hypothesis.
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Affiliation(s)
| | - Sarah V Ulatowski
- NIH COBRE Center for Structural and Functional Neuroscience, The University of Montana, Missoula, MT 59812, United States
| | - Kathleen M George
- NIH COBRE Center for Structural and Functional Neuroscience, The University of Montana, Missoula, MT 59812, United States
| | - Christina D Hayes
- NIH COBRE Center for Structural and Functional Neuroscience, The University of Montana, Missoula, MT 59812, United States
| | - Scott A Steiger
- NIH COBRE Center for Structural and Functional Neuroscience, The University of Montana, Missoula, MT 59812, United States
| | - Nicholas R Natale
- NIH COBRE Center for Structural and Functional Neuroscience, The University of Montana, Missoula, MT 59812, United States; Department of Chemistry, University of Idaho, Moscow, ID 83843, United States.
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15
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Li C, Campbell MJ, Weaver MJ, Duncan NS, Hunting JL, Natale NR. Ethyl 3-(10-bromo-anthracen-9-yl)-5-methyl-1,2-oxazole-4-carboxyl-ate. Acta Crystallogr Sect E Struct Rep Online 2013; 69:o1804-5. [PMID: 24860293 PMCID: PMC4004437 DOI: 10.1107/s1600536813031395] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2013] [Accepted: 11/15/2013] [Indexed: 11/18/2022]
Abstract
In the title compound, C21H16BrNO3, the mean planes of the anthracene tricycle and isoxazole ring are inclined to each other at a dihedral angle of 72.12 (7)°. The carb-oxy group is slightly out of the isoxazole mean plane, with a maximum deviation of 0.070 (5) Å for the carbonyl O atom. In the crystal, pairs of weak C-H⋯O hydrogen bonds link the mol-ecules into dimers, and weak C-H⋯N inter-actions further link these dimers into corrugated layers parallel to the bc plane.
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Affiliation(s)
- Chun Li
- Department of Chemistry, Ithaca College, 953 Danby Road, Ithaca, NY 14850, USA
| | - Michael J. Campbell
- Department of Pharmaceutical & Biomedical Science, The University of Montana, 32 Campus Drive, Missoula, MT 59812, USA
| | - Matthew J. Weaver
- Department of Pharmaceutical & Biomedical Science, The University of Montana, 32 Campus Drive, Missoula, MT 59812, USA
| | - Nathan S. Duncan
- Department of Pharmaceutical & Biomedical Science, The University of Montana, 32 Campus Drive, Missoula, MT 59812, USA
| | - Janet L. Hunting
- Department of Chemistry, Ithaca College, 953 Danby Road, Ithaca, NY 14850, USA
| | - Nicholas R. Natale
- Department of Pharmaceutical & Biomedical Science, The University of Montana, 32 Campus Drive, Missoula, MT 59812, USA
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16
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Critical assessment of two classical synthetic methods for preparation of thiophene-substituted isoxazoles. RESEARCH ON CHEMICAL INTERMEDIATES 2013. [DOI: 10.1007/s11164-013-1101-8] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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17
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Mirzaei YR, Weaver MJ, Steiger SA, Kearns AK, Gajewski MP, Rider KC, Beall HD, Natale NR. Improved synthesis of 3-aryl isoxazoles containing fused aromatic rings. Tetrahedron 2012; 68:10360-10364. [PMID: 23526841 DOI: 10.1016/j.tet.2012.09.084] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
A critical comparison of methods to prepare sterically hindered 3-aryl isoxazoles containing fused aromatic rings using the nitrile oxide cycloaddition (NOC) reveal that modification of the method of Bode, Hachisu, Matsuura, and Suzuki (BHMS), utilizing either triethylamine as base or sodium enolates of the diketone, ketoester, and ketoamide dipolarophiles, respectively, was the method of choice for this transformation.
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Affiliation(s)
- Yousef R Mirzaei
- Medicinal Chemistry Graduate Program, Department of Biomedical and Pharmaceutical Sciences, The University of Montana, Missoula, MT 59812, USA
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Kou S, Zhou H, Tang G, Li R, Zhang Y, Zhao J, Wei C. Experimental and DFT studies on the vibrational and electronic spectra of 9-anthracenemethanol. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2012; 96:768-775. [PMID: 22885894 DOI: 10.1016/j.saa.2012.07.007] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/17/2012] [Revised: 06/21/2012] [Accepted: 07/05/2012] [Indexed: 06/01/2023]
Abstract
Vibrational spectral measurements were made for 9-anthracenemethanol. Optimized geometrical structure and harmonic vibration frequencies were computed based on ab initio and density functional theory B3LYP methods using 6-311G(**) and LANL2DZ basis sets. The equilibrium geometries got from all of the methods and basis were compared with X-ray diffraction results. The IR and UV-vis spectra of the title compound were computed using all of the methods and choose the most appropriate way to discuss. And the absorption spectra were calculated both in gas phase and in CH(3)CH(2)OH and CH(3)CN solution. The calculated results matched well with the experimental values. On the basis, the first excited state electronic transition energy has been calculated using time-dependent density functional theory.
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Affiliation(s)
- Shanshan Kou
- School of Chemical Engineering, Ningxia University, Ningxia 210094, People's Republic of China
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19
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Ong CW, Liu MC, Lee KD, Chang KW, Yang YT, Tung HW, Fox KR. Synthesis of bisquinoline–pyrrole oligoamide as G-quadruplex binding ligand. Tetrahedron 2012. [DOI: 10.1016/j.tet.2012.05.001] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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Jain AK, Bhattacharya S. Interaction of G-Quadruplexes with Nonintercalating Duplex-DNA Minor Groove Binding Ligands. Bioconjug Chem 2011; 22:2355-68. [DOI: 10.1021/bc200268a] [Citation(s) in RCA: 63] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Affiliation(s)
- Akash K. Jain
- Department
of Organic Chemistry, Indian Institute of Science, Bangalore 560 012, India
| | - Santanu Bhattacharya
- Department
of Organic Chemistry, Indian Institute of Science, Bangalore 560 012, India
- Chemical Biology Unit, Jawaharlal Nehru Centre for Advanced Scientific Research, Bangalore 560 012, India
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Geetha K, Kumar DKAP, Lakshmanan D, Savitha R, Murugavel S. ( E)- N-(Anthracen-9-ylmethylidene)-4-nitroaniline. Acta Crystallogr Sect E Struct Rep Online 2011; 67:o2577. [PMID: 22058743 PMCID: PMC3201478 DOI: 10.1107/s1600536811035859] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2011] [Accepted: 09/02/2011] [Indexed: 11/11/2022]
Abstract
In the title molecule, C21H14N2O2, the anthracenyl system is approximately planar [maximum deviation = 0.056 (4) Å] and is oriented at a dihedral angle of 73.6 (1)° with respect to the benzene ring. An intramolecular C—H⋯N hydrogen bond generates an S(6) ring motif. The crystal packing is stabilized by C—H⋯π and π–π interactions [centroid–centroid distances of 3.688 (2), 3.656 (1) and 3.716 (2) Å].
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23
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Arumugam N, Almansour AI, Karama U, Rosli MM, Razak IA. 9-(Pent-4-en-yl)anthracene. Acta Crystallogr Sect E Struct Rep Online 2011; 67:o2251. [PMID: 22064836 PMCID: PMC3200868 DOI: 10.1107/s1600536811030571] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2011] [Accepted: 07/29/2011] [Indexed: 11/10/2022]
Abstract
In the title compound, C(19)H(18), the anthracene system is almost planar, with a maximum deviation of -0.039 (1) Å. The structure is stabilized by C-H⋯π inter-actions. The pentene moiety is not planar and is twisted away from the attached anthracene system with a maximum torsion angle of 91.2 (1)°.
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24
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Gajewski MP, Beall H, Schnieder M, Stranahan SM, Mosher MD, Rider KC, Natale NR. Bis-anthracenyl isoxazolyl amides have enhanced anticancer activity. Bioorg Med Chem Lett 2009; 19:4067-9. [PMID: 19560922 PMCID: PMC2731571 DOI: 10.1016/j.bmcl.2009.06.019] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2009] [Revised: 06/01/2009] [Accepted: 06/03/2009] [Indexed: 02/06/2023]
Abstract
Dimeric analogs of Anthracenyl Isoxazole Amides (AIMs) (the designation AIM is in honor of the memory of Professor Albert I. Meyers) were prepared and dimer 6 exhibited the highest efficacy to date for this class of anti-tumor compounds against the human glioma Central Nervous System cell line SNB-19.
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Affiliation(s)
- Mariusz P Gajewski
- Department of Biomedical and Pharmaceutical Sciences, The University of Montana, Missoula, MT 59812, USA
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