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Pharmacological profile of natural and synthetic compounds with rigid adamantane-based scaffolds as potential agents for the treatment of neurodegenerative diseases. Biochem Biophys Res Commun 2020; 529:1225-1241. [PMID: 32819589 DOI: 10.1016/j.bbrc.2020.06.123] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2020] [Accepted: 06/24/2020] [Indexed: 12/22/2022]
Abstract
This review is dedicated to the comparative analysis of structure-activity relationships for more than 75 natural and synthetic derivatives of adamantane. Some of these compounds, such as amantadine and memantine, are currently used to treat dementia, Alzheimer's and Parkinson's diseases and other neurodegenerative diseases. The data presented show that the pharmacological potential of 1-fluoro- and 1-phosphonic acid adamantane derivatives against Alzheimer's and Parkinson's diseases and other neurodegenerative diseases exceeds those of well-known amantadine and memantine. The information presented in this review highlights the promising directions of studies for biochemists, pharmacologists, medicinal chemists, physiologists, and neurologists, as well as to the pharmaceutical industry.
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Zinc and aluminum complexes of chiral ligands: Synthesis, characterization and application to rac-lactide polymerization. J Organomet Chem 2017. [DOI: 10.1016/j.jorganchem.2016.12.031] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Doinikov DA, Kollhammerova I, Löbl J, Necas M, Timoshkin AY, Pinkas J. Alumazene adducts with acetonitrile: Structure and thermal stability. J Organomet Chem 2016. [DOI: 10.1016/j.jorganchem.2016.02.039] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Chyba J, Moravec Z, Necas M, Mathur S, Pinkas J. Construction of Larger Molecular Aluminophosphate Cages from the Cyclic Four-Ring Building Unit. Inorg Chem 2014; 53:3753-62. [DOI: 10.1021/ic500083a] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Jan Chyba
- Department
of Chemistry, Faculty of Science, Masaryk University, Kotlarska
2, CZ-61137 Brno, Czech Republic
- Central
European Institute of Technology (CEITEC), Masaryk University, CZ-62500 Brno, Czech Republic
| | - Zdenek Moravec
- Department
of Chemistry, Faculty of Science, Masaryk University, Kotlarska
2, CZ-61137 Brno, Czech Republic
- Central
European Institute of Technology (CEITEC), Masaryk University, CZ-62500 Brno, Czech Republic
| | - Marek Necas
- Department
of Chemistry, Faculty of Science, Masaryk University, Kotlarska
2, CZ-61137 Brno, Czech Republic
- Central
European Institute of Technology (CEITEC), Masaryk University, CZ-62500 Brno, Czech Republic
| | - Sanjay Mathur
- Institute
of Inorganic Chemistry, University of Cologne, Greinstrasse 6, D-50939, Cologne, Germany
| | - Jiri Pinkas
- Department
of Chemistry, Faculty of Science, Masaryk University, Kotlarska
2, CZ-61137 Brno, Czech Republic
- Central
European Institute of Technology (CEITEC), Masaryk University, CZ-62500 Brno, Czech Republic
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Affiliation(s)
| | - Jiri Löbl
- a Masaryk University , Brno, Czech Republic
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Maheswari K, Rajendran NM, Meyer J, Reddy ND. Reactions of an Aluminum Amide with Aromatic Nitriles: Formation of Al−N−C Frameworks. Organometallics 2010. [DOI: 10.1021/om100406y] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- K. Maheswari
- Department of Chemistry, Pondicherry University, Pondicherry 605014, India
| | - N. M. Rajendran
- Department of Chemistry, Pondicherry University, Pondicherry 605014, India
| | - Jens Meyer
- Institut für Anorganische Chemie, Karlsruhe Institute of Technology (KIT), 76313 Karlsruhe, Germany
| | - N. Dastagiri Reddy
- Department of Chemistry, Pondicherry University, Pondicherry 605014, India
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Murugavel R, Gogoi N. Rings, chains and cages in metal phosphate chemistry: The interdependence and possible interconversion between various structural forms. J Organomet Chem 2010. [DOI: 10.1016/j.jorganchem.2009.10.046] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Jin C, Wang ZX. Synthesis and characterization of lithium, aluminium and zinc complexes supported by pyrazolyl-based N,N′-chelate ligands. NEW J CHEM 2009. [DOI: 10.1039/b811094h] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
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Murugavel R, Kuppuswamy S. Water in Organoaluminum Chemistry! Three-in-One Aluminophosphate Clusters That Incorporate Boehmite Repeating Units. Chemistry 2008; 14:3869-73. [DOI: 10.1002/chem.200800320] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Löbl J, Timoshkin AY, Cong T, Necas M, Roesky HW, Pinkas J. Alumazene Adducts with Pyridines: Synthesis, Structure, and Stability Studies. Inorg Chem 2007; 46:5678-85. [PMID: 17567003 DOI: 10.1021/ic700488p] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Lewis acid-base adducts of the alumazene [2,6-(i-Pr)2C6H3NAlMe]3 (1) with pyridine (py) and 4-dimethylaminopyridine (dmap) were synthesized and structurally characterized: 1(py)2 (2), 1(py)3 (3), 1(dmap)2 (4), and 1(py)(dmap) (5). The bisadducts 2, 4, and 5 form the trans isomers. The trisadduct 3 exhibits an unexpected cis-cis isomer and can be prepared only in the presence of excess py. The planarity of the alumazene ring is lost upon coordination of the Lewis base molecules. A comparison of the Al-N(base) bond distances and pyramidality at Al suggests the higher basicity of dmap. NMR spectroscopy confirms stability to dissociation of the bisadducts in solution while the trisadduct 3 is labile and converts to 2. The thermodynamics of the adduct formation has been investigated experimentally and theoretically. Thermodynamic characteristics of the 1(py)n (n=2, 3) dissociation reactions in the temperature range 25-200 degrees C have been derived from the vapor pressure-temperature dependence measurements by the static tensimetric method. In all experiments, excess py was employed. Quantum chemical computations at the B3LYP/6-31G* level of theory have been performed for the 1(py)n and model complexes [HAlNH]3(py)n (n=1-3). Obtained results indicate that for the gas phase adducts upon increasing the number of py ligands the donor-acceptor Al-N(py) distance increases in accord with decreasing donor-acceptor bond dissociation energies.
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Affiliation(s)
- Jiri Löbl
- Department of Chemistry, Masaryk University, Kotlarska 2, CZ-61137 Brno, Czech Republic
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Mitra A, DePue LJ, Struss JE, Patel BP, Parkin S, Atwood DA. Mononuclear Schiff Base Boron Halides: Synthesis, Characterization, and Dealkylation of Trimethyl Phosphate. Inorg Chem 2006; 45:9213-24. [PMID: 17083219 DOI: 10.1021/ic0607890] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A series of mononuclear boron halides of the type LBX(2) [LH = N-phenyl-3,5-di-tert-butylsalicylaldimine, X = Cl (2), Br (3)] and LBX [LH2 = N-(2-hydroxyphenyl)-3,5-di-tert-butylsalicylaldimine, X = Cl (7), Br (8); LH2 = N-(2-hydroxyethyl)-3,5-di-tert-butylsalicylaldimine, X = Cl (9), Br (10); and LH2 = N-(3-hydroxypropyl)-3,5-di-tert-butylsalicylaldimine, X = Cl (11), Br (12)] were synthesized from their borate precursors LB(OMe)2 (1) (LH = N-phenyl-3,5-di-tert-butylsalicylaldimine) and LB(OMe) [LH2 = N-(2-hydroxyphenyl)-3,5-di-tert-butylsalicylaldimine (4), N-(2-hydroxyethyl)-3,5-di-tert-butylsalicylaldimine (5), N-(3-hydroxypropyl)-3,5-di-tert-butylsalicylaldimine (6)]. The boron halide compounds were air and moisture sensitive, and upon hydrolysis, compound 7 resulted in the oxo-bridged compound 13 that contained two seven-membered boron heterocycles. The boron halide compounds dealkylated trimethyl phosphate in stoichiometric reactions to produce methyl halide and unidentified phosphate materials. Compounds 8 and 12 were found to be the most effective dealkylating agents. On reaction with tert-butyl diphenyl phosphinate, compound 8 produced a unique boron phosphinate compound LB(O)OPPh2 (14) containing a terminal phosphinate group. Compounds 1-14 were characterized by 1H, 13C, 11B, 31P NMR, IR, MS, EA, and MP. Compounds 5, 6, and 11-14 also were characterized by single-crystal X-ray diffraction.
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Affiliation(s)
- Amitabha Mitra
- Department of Chemistry, University of Kentucky, Lexington, Kentucky 40506-0055, USA
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Löbl J, Pinkas J, Roesky HW, Plass W, Görls H. A Supramolecular Hexameric Ring from Alumazene and Methylsulfonate. Inorg Chem 2006; 45:6571-3. [PMID: 16903703 DOI: 10.1021/ic060490h] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A dealkylsilylation reaction of alumazene [2,6-(i-Pr)2C6H3NAlMe]3 (1) with trimethylsilyl methylsulfonate in a 1:2 molar ratio in toluene afforded a supramolecular cyclic hexamer {Me[2,6-(i-Pr)2C6H3NAl]3(O3SMe)2}6 (2) composed of six intact alumazene rings and possessing two types of bridging sulfonate groups. Changing the reagent molar ratio to 1:3 caused the third sulfonate to partially substitute the last alumazene methyl group in an eta2 fashion and introduced a disorder in the crystal lattice.
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Affiliation(s)
- Jiri Löbl
- Department of Inorganic Chemistry, Masaryk University, Kotlarska 2, CZ-61137 Brno, Czech Republic
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Löbl J, Necas M, Pinkas J. Alumazene adducts with triphenylphosphine oxide. MAIN GROUP CHEMISTRY 2006. [DOI: 10.1080/10241220600923850] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Mitra A, Depue LJ, Parkin S, Atwood DA. Five-Coordinate Aluminum Bromides: Synthesis, Structure, Cation Formation, and Cleavage of Phosphate Ester Bonds. J Am Chem Soc 2006; 128:1147-53. [PMID: 16433530 DOI: 10.1021/ja054684s] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The alkane elimination reaction between Salen((t)Bu)H(2) ligands and diethylaluminum bromide was used to prepare three Salen aluminum bromide compounds salen((t)Bu)AlBr (1) (salen = N,N'-ethylenebis(3,5-di-tert-butylsalicylideneimine)), salpen((t)Bu)AlBr (2) (salpen = N,N'-propylenebis(3,5-di-tert-butylsalicylideneimine)), and salophen((t)Bu)AlBr (3) (salophen = N,N'-o-phenylenenebis(3,5-di-tert-butylsalicylideneimine)). The compounds contain five-coordinate aluminum either in a distorted square pyramidal or a trigonal bipyramidal environment. The bromide group in these compounds could be displaced by triphenylphosphine oxide or triphenyl phosphate to produce the six-coordinate cationic aluminum compounds [salen((t)Bu)Al(Ph(3)PO)(2)]Br (4), [salpen((t)Bu)Al(Ph(3)PO)(2)]Br (5), [salophen((t)Bu)Al(Ph(3)PO)(2)]Br (6), and [salophen((t)Bu)Al[(PhO)(3)PO)](2)]Br (7). All the compounds were characterized by (1)H, (13)C, (27)Al, and (31)P NMR, IR, mass spectrometry, and melting point. Furthermore, compounds 1-3 and 5-7 were structurally characterized by single-crystal X-ray diffraction. Compounds 1-3 dealkylated a series of organophosphates in stoichiometric reactions by breaking the ester C-O bond. Also, they were catalytic in the dealkylation reaction between trimethyl phosphate and added boron tribromide.
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Affiliation(s)
- Amitabha Mitra
- Department of Chemistry, University of Kentucky, Lexington, 40506-0055, USA
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Timoshkin AY. Group 13 imido metallanes and their heavier analogs [RMYR′]n (M=Al, Ga, In; Y=N, P, As, Sb). Coord Chem Rev 2005. [DOI: 10.1016/j.ccr.2005.03.016] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Bauer T, Schulz S. Studien zur Reaktivit�t des viergliedrigen basenstabilisierten Iminoalans [(Me3N)HAlNDipp]2 mit elementarem Iod. Z Anorg Allg Chem 2004. [DOI: 10.1002/zaac.200400105] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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