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Shishkina SV, Shaposhnyk AM, Konovalova IS, Dyakonenko VV, Vaksler YO. Concomitant polymorphs of 2-imino-2H-chromene-3-carboxylic acid amide: experimental and quantum chemical study. ACTA CRYSTALLOGRAPHICA SECTION B, STRUCTURAL SCIENCE, CRYSTAL ENGINEERING AND MATERIALS 2024; 80:27-37. [PMID: 38205837 DOI: 10.1107/s2052520623010193] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/29/2023] [Accepted: 11/24/2023] [Indexed: 01/12/2024]
Abstract
2-Iminocoumarin-3-carboxamide (2-imino-2 H-chromene-3-carboxylic acid) is a perspective compound for use in the pharmaceutical industry. This compound crystallized from several solvents as two concomitant polymorphic forms. The monoclinic polymorph, crystallized initially, is formed due to strong N-H...O hydrogen bonds, weak C-H...O and C-H...N(π) hydrogen bonds, and stacking interactions of `head-to-head' type. The triclinic polymorphic form obtained due to slow evaporation of the same solution is formed due to only strong intermolecular interactions, N-H...O hydrogen bonds of two types, and stacking interactions of two types. Analysis of pairwise interaction energies showed that the monoclinic structure is columnar while the triclinic one is layered. Calculations in a periodic approximation of their lattice energies confirmed that the monoclinic polymorphic crystals are metastable as compared to the stable triclinic polymorph. Further quantum chemical modeling of possible structure deformations proved that both concomitant polymorphs can not be transformed into a new polymorphic form under external influence.
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Affiliation(s)
- Svitlana V Shishkina
- SSI "Institute for Single Crystals" NAS of Ukraine, 60 Nauky ave., Kharkiv, 61001, Ukraine
| | - Anna M Shaposhnyk
- SSI "Institute for Single Crystals" NAS of Ukraine, 60 Nauky ave., Kharkiv, 61001, Ukraine
| | - Irina S Konovalova
- SSI "Institute for Single Crystals" NAS of Ukraine, 60 Nauky ave., Kharkiv, 61001, Ukraine
| | - Victoriya V Dyakonenko
- SSI "Institute for Single Crystals" NAS of Ukraine, 60 Nauky ave., Kharkiv, 61001, Ukraine
| | - Yevhenii O Vaksler
- SSI "Institute for Single Crystals" NAS of Ukraine, 60 Nauky ave., Kharkiv, 61001, Ukraine
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2
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Fatima S, Mansha A, Asim S. Computational Studies Followed by Effect of Solvent Polarity and Salts on HOMO-LUMO Gap of 7-Hydroxy Coumarine Notabally Reflected by Absorption and Emission Spectra. J Fluoresc 2022; 32:2351-2362. [PMID: 36171504 DOI: 10.1007/s10895-022-03031-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2022] [Accepted: 09/14/2022] [Indexed: 11/26/2022]
Abstract
7-Hydroxycoumarin's FT-IR solid phase spectra were observed at 4000-400 cm-1. The spectra were analyzed in aspects of significant approaches. DFT was used to optimize the structure of the compound and its structural properties. The molecular properties were also determined by the HF/3-21G level. The bond lengths and bond angles were obtained by the computational study of the optimized geometry. The vibrational frequencies were determined in all these approaches, which were then matched to experimental frequencies, yielding an excellent agreement between measured and estimated frequency ranges. The UV-visible spectrum of 7HC was obtained and the electronic characteristics HOMO and LUMO energies were monitored by the time-dependent TD-DFT method. The spectral behavior of 7-Hydroxycoumarin was studied using fluorescence spectroscopy in a wide range of polar and non-polar solvents. Solvatochromic effect was observed in both the fluorescence and absorption spectra. The structural properties, energies, IR intensities, absorption wavelengths, and harmonic vibrational frequencies were compared with the obtainable experimental information of the molecule.
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Affiliation(s)
- Sana Fatima
- Department of Chemistry, Government College Women University, Faisalabad, Pakistan
| | - Asim Mansha
- Department of Chemistry, Government College University, Faisalabad, Pakistan
| | - Sadia Asim
- Department of Chemistry, Government College Women University, Faisalabad, Pakistan.
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3
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Houshmand A, Heroux D, Liu DY, Zhou W, Linington RG, Bally M, Warren JJ, Walsby CJ. Ferrocene-appended anthraquinone and coumarin as redox-active cytotoxins. Dalton Trans 2022; 51:11437-11447. [PMID: 35822497 DOI: 10.1039/d2dt01251k] [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
Appending of ferrocene (Fc) to biologically-active organic backbones can generate novel multi-functional species for targeting bacteria and cancer. In this work Fc was linked to coumarin and anthraquinone with the goal of harnessing the redox-active Fc centre to generate new compounds that exhibit cytoxicity through the generation of toxic reactive oxygen species (ROS). A Cu(I)-catalyzed azide-alkyne cycloaddition "click" reaction was used to connect the organic and Fc components via a triazole linker. Cyclic voltammetry shows that the Fc potentials are suitable for oxidation by biological hydrogen peroxide to give reactive ferrocenium (Fc+) species, which can then generate hydroxyl radicals. The ability of the compounds to generate hydroxyl radicals in the presence of hydrogen peroxide was shown directly using EPR spin-trapping experiments. Furthermore, in vitro studies in MCF-7 breast cancer cells show significant increases in ROS following incubation with the Fc-functionalized compounds. Screening for antibacterial activity produced negative results for all of the Fc compounds, consitent with low levels of hydrogen peroxide typically found in bacteria. By contrast, Fc-coumarin showed cytotoxicity against A549 lung cancer and SKOV3 ovarian cancer cell lines, whereas the parent compound was inactive. This is consistent both with the cytoxic potential of the Fc group and the elevated hydrogen peroxide levels found in many cancers. Interestingly, the anthraquinone compounds showed the opposite effect with the parent compounds showing modest activity against A549 cells, but the Fc compounds being inactive. This demonstrates other potential negative impacts of including Fc, such as significantly increased lipophilicity.
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Affiliation(s)
- Aryan Houshmand
- Department of Chemistry, Simon Fraser University, 8888 University Dr., Burnaby, BC, V5A 1S6, Canada.
| | - Devon Heroux
- BC Cancer Research Institute, 675 West 10th Ave., Vancouver, BC, V5Z 1L3, Canada
| | - Dennis Y Liu
- Department of Chemistry, Simon Fraser University, 8888 University Dr., Burnaby, BC, V5A 1S6, Canada.
| | - Wen Zhou
- Department of Chemistry, Simon Fraser University, 8888 University Dr., Burnaby, BC, V5A 1S6, Canada.
| | - Roger G Linington
- Department of Chemistry, Simon Fraser University, 8888 University Dr., Burnaby, BC, V5A 1S6, Canada.
| | - Marcel Bally
- BC Cancer Research Institute, 675 West 10th Ave., Vancouver, BC, V5Z 1L3, Canada
| | - Jeffrey J Warren
- Department of Chemistry, Simon Fraser University, 8888 University Dr., Burnaby, BC, V5A 1S6, Canada.
| | - Charles J Walsby
- Department of Chemistry, Simon Fraser University, 8888 University Dr., Burnaby, BC, V5A 1S6, Canada.
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4
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Ueda M, Kokubun M, Mazaki Y. Synthesis, structures, and properties of triskelion-shaped fluorophores bearing coumarins with nitrogen-containing donor groups. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2021. [DOI: 10.1246/bcsj.20210310] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Masafumi Ueda
- Department of Chemistry, Graduate School of Science, Kitasato University, 1-15-1, Kitasato, Minami-ku, Sagamihara, Kanagawa, 252-0373
| | - Mirai Kokubun
- Department of Chemistry, Graduate School of Science, Kitasato University, 1-15-1, Kitasato, Minami-ku, Sagamihara, Kanagawa, 252-0373
| | - Yasuhiro Mazaki
- Department of Chemistry, Graduate School of Science, Kitasato University, 1-15-1, Kitasato, Minami-ku, Sagamihara, Kanagawa, 252-0373
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5
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Shishkina SV, Konovalova IS, Kovalenko SM, Trostianko PV, Geleverya AO, Bunyatyan ND. Hydrogen bonding vs. stacking interaction in the crystals of the simplest coumarin derivatives: a study from the energetic viewpoint. CrystEngComm 2019. [DOI: 10.1039/c9ce01344j] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Hydrogen bonded and stacked dimers have very close interaction energies in the crystals of the simplest coumarin derivatives according to the data of the crystal structure analysis based on the comparison of pairwise interaction energies.
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Affiliation(s)
- Svitlana V. Shishkina
- SSI “Institute for Single Crystals” National Academy of Science of Ukraine
- Kharkiv
- Ukraine
- V. N. Karazin Kharkiv National University
- Kharkiv 61077
| | - Irina S. Konovalova
- SSI “Institute for Single Crystals” National Academy of Science of Ukraine
- Kharkiv
- Ukraine
| | - Sergiy M. Kovalenko
- V. N. Karazin Kharkiv National University
- Kharkiv 61077
- Ukraine
- Federal State Autonomous Educational Institution of Higher Education I.M. Sechenov First Moscow State Medical University of the Ministry of Healthcare of the Russian Federation (Sechenovskiy University)
- Moscow
| | | | | | - Natalya D. Bunyatyan
- Federal State Autonomous Educational Institution of Higher Education I.M. Sechenov First Moscow State Medical University of the Ministry of Healthcare of the Russian Federation (Sechenovskiy University)
- Moscow
- Russia
- Federal State Budgetary Institution “Scientific Centre for Expert Evaluation of Medicinal Products” of the Ministry of Health of the Russian Federation
- Moscow
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6
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Shtukenberg AG, Zhu Q, Carter DJ, Vogt L, Hoja J, Schneider E, Song H, Pokroy B, Polishchuk I, Tkatchenko A, Oganov AR, Rohl AL, Tuckerman ME, Kahr B. Powder diffraction and crystal structure prediction identify four new coumarin polymorphs. Chem Sci 2017; 8:4926-4940. [PMID: 28959416 PMCID: PMC5607859 DOI: 10.1039/c7sc00168a] [Citation(s) in RCA: 64] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2017] [Accepted: 04/30/2017] [Indexed: 11/21/2022] Open
Abstract
Coumarin, a simple, commodity chemical isolated from beans in 1820, has, to date, only yielded one solid state structure. Here, we report a rich polymorphism of coumarin grown from the melt. Four new metastable forms were identified and their crystal structures were solved using a combination of computational crystal structure prediction algorithms and X-ray powder diffraction. With five crystal structures, coumarin has become one of the few rigid molecules showing extensive polymorphism at ambient conditions. We demonstrate the crucial role of advanced electronic structure calculations including many-body dispersion effects for accurate ranking of the stability of coumarin polymorphs and the need to account for anharmonic vibrational contributions to their free energy. As such, coumarin is a model system for studying weak intermolecular interactions, crystallization mechanisms, and kinetic effects.
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Affiliation(s)
- Alexander G Shtukenberg
- Department of Chemistry , Molecular Design Institute , New York University , New York City , NY 10003 , USA .
| | - Qiang Zhu
- Department of Physics and Astronomy , High Pressure Science and Engineering Center , University of Nevada Las Vegas , Nevada 89154 , USA .
- Department of Geosciences , Stony Brook University , Stony Brook , NY 11794 , USA
| | - Damien J Carter
- Curtin Institute for Computation and Department of Chemistry , Curtin University , P.O. Box U1987 , Perth , 6845 , Western Australia , Australia
| | - Leslie Vogt
- Department of Chemistry , New York University , New York City , NY 10003 , USA
| | - Johannes Hoja
- Fritz-Haber-Institut der Max-Planck-Gesellschaft , Faradayweg 4-6 , Berlin , 14195 , Germany
- Physics and Materials Science Research Unit , University of Luxembourg , 1511 Luxembourg , Luxembourg
| | - Elia Schneider
- Department of Chemistry , New York University , New York City , NY 10003 , USA
| | - Hongxing Song
- Department of Chemistry , New York University , New York City , NY 10003 , USA
| | - Boaz Pokroy
- Department of Materials Science and Engineering , Russell Berrie Nanotechnology Institute , Technion Israel Institute of Technology , Haifa 32000 , Israel
| | - Iryna Polishchuk
- Department of Materials Science and Engineering , Russell Berrie Nanotechnology Institute , Technion Israel Institute of Technology , Haifa 32000 , Israel
| | - Alexandre Tkatchenko
- Fritz-Haber-Institut der Max-Planck-Gesellschaft , Faradayweg 4-6 , Berlin , 14195 , Germany
- Physics and Materials Science Research Unit , University of Luxembourg , 1511 Luxembourg , Luxembourg
| | - Artem R Oganov
- Skolkovo Institute of Science and Technology , Skolkovo Innovation Center , 3 Nobel St. , Moscow 143026 , Russia
- Department of Geosciences , Stony Brook University , Stony Brook , NY 11794 , USA
| | - Andrew L Rohl
- Curtin Institute for Computation and Department of Chemistry , Curtin University , P.O. Box U1987 , Perth , 6845 , Western Australia , Australia
| | - Mark E Tuckerman
- Department of Chemistry , New York University , New York City , NY 10003 , USA
- Courant Institute of Mathematical Sciences , New York University , New York City , NY 10003 , USA
- New York University-East China Normal University Center for Computational Chemistry at NYU Shanghai , 3663 Zhongshan Road North , Shanghai 200062 , China
| | - Bart Kahr
- Department of Chemistry , Molecular Design Institute , New York University , New York City , NY 10003 , USA .
- Department of Advanced Science and Engineering (TWIns) , Waseda University , Wakamatsucho, 3-2 , Shinjuku , 162-0056 Tokyo , Japan
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7
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Sebastian S, Sylvestre S, Jayarajan D, Amalanathan M, Oudayakumar K, Gnanapoongothai T, Jayavarthanan T. Molecular structure, Normal Coordinate Analysis, harmonic vibrational frequencies, Natural Bond Orbital, TD-DFT calculations and biological activity analysis of antioxidant drug 7-hydroxycoumarin. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2013; 101:370-381. [PMID: 23123244 DOI: 10.1016/j.saa.2012.09.041] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/23/2012] [Revised: 09/16/2012] [Accepted: 09/20/2012] [Indexed: 06/01/2023]
Abstract
In this work, we report harmonic vibrational frequencies, molecular structure, NBO and HOMO, LUMO analysis of Umbelliferone also known as 7-hydroxycoumarin (7HC). The optimized geometric bond lengths and bond angles obtained by computation (monomer and dimmer) shows good agreement with experimental XRD data. Harmonic frequencies of 7HC were determined and analyzed by DFT utilizing 6-311+G(d,p) as basis set. The assignments of the vibrational spectra have been carried out with the help of Normal Coordinate Analysis (NCA) following the Scaled Quantum Mechanical Force Field Methodology (SQMFF). The change in electron density (ED) in the σ* and π* antibonding orbitals and stabilization energies E(2) have been calculated by Natural Bond Orbital (NBO) analysis to give clear evidence of stabilization originating in the hyperconjugation of hydrogen-bonded interaction. The energy and oscillator strength calculated by Time-Dependent Density Functional Theory (TD-DFT) complements with the experimental findings. The simulated spectra satisfactorily coincides with the experimental spectra. Microbial activity of studied compounds was tested against Staphylococcus aureus, Streptococcus pyogenes, Bacillus subtilis, Escherichia coli, Psuedomonas aeruginosa, Klebsiella pneumoniae, Proteus mirabilis, Shigella flexneri, Salmonella typhi and Enterococcus faecalis.
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Affiliation(s)
- S Sebastian
- Department of Physics (Science and Humanities), Sri Manakula Vinayagar Engg. College, Madagadipet, Puducherry 605 107, India.
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8
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Park KM, Kang Y. 10-(1,3-Benzothia-zol-2-yl)-1,1,7,7-tetra-methyl-2,3,6,7-tetra-hydro-1H,5H,11H-pyrano[3,2-g]pyrido[3,2,1-hi]quinoline. Acta Crystallogr Sect E Struct Rep Online 2010; 66:o963. [PMID: 21580765 PMCID: PMC2983933 DOI: 10.1107/s1600536810011086] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2010] [Accepted: 03/24/2010] [Indexed: 11/26/2022]
Abstract
In the title compound, C(26)H(26)N(2)O(2)S, the dihedral angle between the benzothia-zole and coumarin rings is 8.34 (7)°, indicating that the overall benzothia-zole substituent is almost coplanar with the coumarin rings. An intra-molecular S⋯O [2.813 (1) Å] contact may help to stabilize the mol-ecular conformation. In the crystal structure, π-π stacking inter-actions [centroid-centroid distances = 3.480 (2) Å] link pairs of mol-ecules.
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Affiliation(s)
- Ki-Min Park
- Department of Chemistry & Research Institute of Natural Science, Gyeongsang National University, Jinju 660-701, Republic of Korea
| | - Youngjin Kang
- Division of Science Education, Kangwon National University, Chuncheon 200-701, Republic of Korea
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9
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Takechi H, Kubo K, Takahashi H, Matsumoto T. Crystal structure, mesomorphic and emission properties of liquid crystals having a 7-(diethylamino)-3-phenylcoumarin core. J Oleo Sci 2007; 56:195-200. [PMID: 17898482 DOI: 10.5650/jos.56.195] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023] Open
Abstract
Cholesteryl 4-(7-diethylamino-2-oxo-2H-1-benzopyran-3-yl)benzoate (1) had an enantiotropic cholesteric phase. The crystal structure of 1 has been determined by X-ray crystallographic analysis. The crystals of 1 had intermolecular CH...pi and CH...O interactions. 7-(Diethylamino)-3-phenylcoumarin derivatives (1) gave a strong emission band at 500 nm in the solid state when excited at 440 nm.
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Affiliation(s)
- Haruko Takechi
- Faculty of Pharmaceutical Sciences, Health Sciences University of Hokkaido, Hokkaido, Japan
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10
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Abraham RJ, Mobli M, Ratti J, Sancassan F, Smith TAD. Conformational analysis, Part 41. A modelling and LIS/NMR investigation of the conformations ofα,β-unsaturated carbonyl compounds. J PHYS ORG CHEM 2006. [DOI: 10.1002/poc.1092] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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11
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Molecular aspects of furocoumarin reactions: Photophysics, photochemistry, photobiology, and structural analysis. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY C-PHOTOCHEMISTRY REVIEWS 2005. [DOI: 10.1016/j.jphotochemrev.2005.08.002] [Citation(s) in RCA: 102] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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12
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Gavezzotti A. A Molecular Dynamics Test of the Different Stability of Crystal Polymorphs under Thermal Strain. J Am Chem Soc 2000. [DOI: 10.1021/ja000588+] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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13
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Nesterov VN, Struchkov YT, Kovalenko SN, Sharanin YA, Zhuravel IA. Structure of 3-(2-aminothiazol-4-yl)coumarin. Russ Chem Bull 1995. [DOI: 10.1007/bf00702391] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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14
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Lewis DF, Lake BG, Ioannides C, Parke DV. Inhibition of rat hepatic aryl hydrocarbon hydroxylase activity by a series of 7-hydroxy coumarins: QSAR studies. Xenobiotica 1994; 24:829-38. [PMID: 7810165 DOI: 10.3109/00498259409043282] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
1. Molecular orbital calculations, by the Modified Intermediate Neglect of Differential Overlap (MINDO/3) method, of a series of twenty-five 8-acyl-7-hydroxy coumarins show that the inhibition of aryl hydrocarbon hydroxylase (AHH) activities (cytochrome P4501, CYP1 activity, primarily CYP1A1) for 23 of these compounds is related to their structural parameters. The two remaining compounds are the only chlorinated derivatives; these are inactive towards the AHH system and were excluded from the quantitative structure-activity relationship (QSAR) analysis. 2. The results of multiple regression analyses show that AHH activity is dependent on the energy of the highest occupied molecular orbital, E(HOMO), in a single variable expression for the 23 compounds. However, a three-variable expression involving superdelocalizabilities provides a more significant correlation with biological activity. 3. The inactivity of the two chlorinated derivatives can be rationalized in terms of their low degree of molecular planarity, as estimated by the area/depth2 parameter, which presumably precludes them from interaction with CYP1.
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Affiliation(s)
- D F Lewis
- School of Biological Sciences, University of Surrey, Guildford, UK
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15
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Licandro E, Maiorana S, Papagni A, Zanotti Gerosa A, Cariati F, Bruni S, Moret M, Chiesi Villa A. A study of the reactivity and structure of cyclic α,β-unsaturated Fischer-type carbene complexes. Inorganica Chim Acta 1994. [DOI: 10.1016/0020-1693(94)03875-9] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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16
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17
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The adsorption of some benzopyrans at the mercury electrode-aqueous electrolyte interface. J Electroanal Chem (Lausanne) 1993. [DOI: 10.1016/0022-0728(93)80165-e] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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18
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Bakulev VM, Gridunova GV, Kirpichenok MA, Karandashova LA, Struchkov YT, Grandberg II. Synthesis of 4,7-diamino-3-formylcoumarins and azomethines derived from them. Chem Heterocycl Compd (N Y) 1993. [DOI: 10.1007/bf00531503] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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19
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Voznyi YV, Dekaprilevich MO, Yufit DS, Struchkov YT. Synthesis of 4-trifluoromethyl-7-hydroxycoumarin derivatives. Structure of 3-cyano-4-trifluoromethyl-7-acetoxycoumarin. Russ Chem Bull 1992. [DOI: 10.1007/bf00866588] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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20
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Shil'nikov VI, Shnulin AN. Some formal aspects of using the atom-atom potential model in energy calculations. J STRUCT CHEM+ 1992. [DOI: 10.1007/bf00781366] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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21
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Yufit DS, Kirpichenok MA, Struchkov YT, Karandashova LA, Grandberg II. X-ray structural and13C NMR spectroscopic investigation of 4,7-diaminocoumarins. ACTA ACUST UNITED AC 1991. [DOI: 10.1007/bf00958558] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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22
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Venugopalan P, Rao TB, Venkatesan K. Studies in crystal engineering. Photochemical and crystallographic investigations of bromocoumarins and (±)-7-(p-bromobenzylidene)piperitone. ACTA ACUST UNITED AC 1991. [DOI: 10.1039/p29910000981] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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23
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X-ray and nmr spectroscopic study of substituted 2-alkylidene-7-diethylaminobenzopyrans. Chem Heterocycl Compd (N Y) 1988. [DOI: 10.1007/bf00479333] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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24
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Lewis DF, Ioannides C, Parke DV. Structural requirements for substrates of cytochromes P-450 and P-448. Chem Biol Interact 1987; 64:39-60. [PMID: 3690723 DOI: 10.1016/0009-2797(87)90059-7] [Citation(s) in RCA: 58] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
Distinct and different molecular structural features are manifested by substrates, inhibitors and inducers of the two families of liver microsomal enzymes, the phenobarbital-induced cytochromes P-450 and the 3-methylcholanthrene-induced cytochromes P-448. In a theoretical study based on molecular orbital calculations and molecular graphics, it is established that cytochrome P-448 substrates contain fused aromatic or heteroaromatic rings giving rise to overall molecular planarity with relatively small molecular depth. In contrast, substrates of the cytochromes P-450 have greater conformational freedom and an ability to bind at more than one point of attachment, as a result of possession of certain characteristic functions, namely, a carbonyl and/or amine moiety coupled with an iso-propyl group, or similar function of equivalent shape and hydrophobicity. The implications are that the binding sites of cytochromes P-448 contain a number of hydrophobic aromatic amino acid residues orientated so as to allow occupation by similar substrates containing co-planar aromatic rings, whereas those of the phenobarbital-induced cytochromes P-450 contain hydrophilic amino acid residues capable of hydrogen bonding to greater than C = O moieties and at least one leucine or valine residue, as these contain the complementary isopropyl function. The corollary of these findings is the possibility of prediction of the toxicity of new chemicals on the basis of their molecular dimensions.
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Affiliation(s)
- D F Lewis
- Department of Biochemistry, University of Surrey, Guildford, U.K
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25
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Thomas F, Buess-Herman C, Gierst L. Phase transition processes displayed by coumarin monolayers at the water-mercury interphase. ACTA ACUST UNITED AC 1986. [DOI: 10.1016/0022-0728(86)80127-9] [Citation(s) in RCA: 33] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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26
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27
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Potential energy calculations on the 2∶1 inclusion compound between deoxycholic acid and (+)-camphor. J INCL PHENOM MACRO 1985. [DOI: 10.1007/bf00658862] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Ernst L. 13C NMR spectroscopy of polycyclic aromatics. VI. Coumarin and the methylcoumarins. ACTA ACUST UNITED AC 1976. [DOI: 10.1016/0022-2364(76)90071-8] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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