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Benzothiazoles from Condensation of o-Aminothiophenoles with Carboxylic Acids and Their Derivatives: A Review. Molecules 2021; 26:molecules26216518. [PMID: 34770926 PMCID: PMC8587170 DOI: 10.3390/molecules26216518] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2021] [Revised: 10/14/2021] [Accepted: 10/21/2021] [Indexed: 01/27/2023] Open
Abstract
Nowadays, organic chemists are interested in the field of heterocyclic chemistry due to its use in the synthesis of a great variety of biologically active compounds. Heterocyclic compounds are widely found in nature and are essential for life. Among these, some natural nitrogen containing heterocyclic compounds have been used as chemotherapeutic agents. Their attachment to sugar molecules either as thioglycosides or as nucleosides analogues plays an important role in vital biological processes as well as in synthetic organic chemistry. Molecules containing benzothiazole (BT) nuclei are of this interesting class of compounds because some of them have been found to have a wide variety of biological activities. In this sense, we selected this topic to review and to then summarize the procedures related to the condensation reactions of o-aminothiophenoles (ATPs) as well as their disulfides with carboxylic acids, esters, orthoesters, acyl chlorides, amides, and nitriles. The condensation reactions with carbon dioxide (CO2) are included. Conventional methods with the use of acid and metal catalysts as well as recent green techniques, such as microwave irradiation, the use of ionic liquids, and ultrasound (US) chemistry, which have proven to have many advantages, were found in the review.
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Chand S, Al-Omary FAM, El-Emam AA, Shukla VK, Prasad O, Sinha L. Study on molecular structure, spectroscopic behavior, NBO, and NLO analysis of 3-methylbezothiazole-2-thione. SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2015; 146:129-41. [PMID: 25813170 DOI: 10.1016/j.saa.2015.03.068] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/09/2014] [Revised: 01/26/2015] [Accepted: 03/05/2015] [Indexed: 10/23/2022]
Abstract
Experimentally observed spectral data (FT-TR and FT-Raman) of 3-methylbezothiazole-2-thione (3MBT2T) were compared with the spectral data obtained by DFT/B3LYP method using 6-311++G(d,p) basis set. UV-Vis spectrum of the title compound was recorded and the electronic properties, such as frontier molecular orbitals and band gap energies were calculated by TD-DFT approach. The molecular properties like dipole moment, polarizability, first static hyperpolarizability, molecular electrostatic potential surface (MEPs), and contour map were calculated to get a better comprehension of the properties of the title molecule. Natural bond orbital (NBO) analysis was applied to investigate the stability of the molecule arising from charge delocalization. Global and local reactivity descriptors were also computed to predict reactivity and reactive sites on the molecule.
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Affiliation(s)
- Satish Chand
- Department of Physics, University of Lucknow, 226007 Lucknow, India
| | - Fatmah A M Al-Omary
- Department of Pharmaceutical Chemistry, College of Pharmacy, King Saud University, Riyadh 11451, Saudi Arabia
| | - Ali A El-Emam
- Department of Pharmaceutical Chemistry, College of Pharmacy, King Saud University, Riyadh 11451, Saudi Arabia
| | - Vikas K Shukla
- Department of Physics, University of Lucknow, 226007 Lucknow, India
| | - Onkar Prasad
- Department of Physics, University of Lucknow, 226007 Lucknow, India
| | - Leena Sinha
- Department of Physics, University of Lucknow, 226007 Lucknow, India.
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Prajapati NP, Vekariya RH, Borad MA, Patel HD. Recent advances in the synthesis of 2-substituted benzothiazoles: a review. RSC Adv 2014. [DOI: 10.1039/c4ra07437h] [Citation(s) in RCA: 107] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
Recent advances in various synthetic protocols of 2-substituted benzothiazole derivatives.
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Affiliation(s)
| | - Rajesh H. Vekariya
- Department of Chemistry
- School of Sciences
- Gujarat University
- Ahmedabad, India
| | - Mayuri A. Borad
- Department of Chemistry
- School of Sciences
- Gujarat University
- Ahmedabad, India
| | - Hitesh D. Patel
- Department of Chemistry
- School of Sciences
- Gujarat University
- Ahmedabad, India
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Arjunan V, Raj A, Santhanam R, Marchewka MK, Mohan S. Structural, vibrational, electronic investigations and quantum chemical studies of 2-amino-4-methoxybenzothiazole. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2013; 102:327-340. [PMID: 23220675 DOI: 10.1016/j.saa.2012.09.076] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/18/2012] [Revised: 09/18/2012] [Accepted: 09/22/2012] [Indexed: 06/01/2023]
Abstract
Extensive vibrational investigations of 2-amino-4-methoxybenzothiazole have been carried out with FTIR and FT-Raman spectral techniques. The electronic structure of the molecule has been analysed by UV-Visible and NMR spectroscopies. The DFT studies were carried out with B3LYP and HF methods utilising 6-31G(d,p), 6-311++G(d,p) and cc-pVDZ basis sets to determine the structural, thermodynamical, vibrational, electronic characteristics of the compound and also to understand the electronic and steric influence of the methoxy amino groups on the skeletal frequencies. The mixing of the fundamental modes was determined with the help of total energy distribution (TED). The energies of the frontier molecular orbitals have also been determined. The kinetic and thermodynamic stability and chemical hardness of the molecule have been determined. Complete NBO analysis was also carried out to find out the intramolecular electronic interactions and their stabilisation energy. (1)H and (13)C NMR chemical shifts and the electronic transitions of the molecule are also discussed.
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Affiliation(s)
- V Arjunan
- Department of Chemistry, Kanchi Mamunivar Centre for Post-Graduate Studies, Puducherry 605 008, India.
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Kumar P, Meenakshi, Kumar S, Kumar A, Hussain K, Kumar S. Solvent-Free One Pot Synthesis of 2-aryl/Heteroarylbenzothiazoles Using Hypervalent Iodine (III) Reagents. J Heterocycl Chem 2012. [DOI: 10.1002/jhet.962] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Parvin Kumar
- Department of Chemistry; Kurukshetra University; Kurukshetra; Haryana-136119; India
| | - Meenakshi
- Department of Chemistry; Guru Jambheshwar University of Science & Technology; Hissar; Haryana-125001; India
| | - Sunil Kumar
- Chemistry Department; Government P. G. College; Hissar; Haryana-125001; India
| | - Ashwani Kumar
- Drug Discovery and Research Laboratory, Department of Pharmaceutical Sciences; Guru Jambheshwar University of Science & Technology; Hissar; Haryana-125001; India
| | - Khalid Hussain
- Chemistry Department; Guru Nanak Khalsa College; Yamuna Nagar; Haryana-135001; India
| | - Suresh Kumar
- Department of Chemistry; Kurukshetra University; Kurukshetra; Haryana-136119; India
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Arjunan V, Sakiladevi S, Rani T, Mythili CV, Mohan S. FTIR, FT-Raman, FT-NMR, UV-visible and quantum chemical investigations of 2-amino-4-methylbenzothiazole. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2012; 88:220-231. [PMID: 22226897 DOI: 10.1016/j.saa.2011.12.037] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/22/2011] [Revised: 11/19/2011] [Accepted: 12/15/2011] [Indexed: 05/31/2023]
Abstract
The FT-IR (4000-400 cm(-1)) and FT-Raman (4000-100 cm(-1)) spectral measurements and complete assignments of the observed spectra of 2-amino-4-methylbenzothiazole (2A4MBT) have been proposed. Ab initio and DFT calculations have been performed and the structural parameters of the compound were determined from the optimised geometry with 6-31G(d,p), 6-311++G(d,p) and cc-pVDZ basis sets and giving energies, harmonic vibrational frequencies, depolarisation ratios, IR intensities and Raman activities. (1)H and (13)C NMR spectra were recorded and (1)H and (13)C nuclear magnetic resonance chemical shifts of the molecule were calculated using the gauge independent atomic orbital (GIAO) method. UV-visible spectrum of the compound was also recorded and the electronic properties, such as HOMO, LUMO and band gap energies were measured by time-dependent DFT (TD-DFT) approach. The geometric parameters, energies, harmonic vibrational frequencies, IR intensities, Raman activities chemical shifts and absorption wavelengths were compared with the available experimental data of the molecule. The influences of methyl and amino groups on the skeletal modes and on the proton chemical shifts have been investigated.
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Affiliation(s)
- V Arjunan
- Department of Chemistry, Kanchi Mamunivar Centre for Post-Graduate Studies, Puducherry, India.
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Khosravi K, Kazemi S. Synthesis of 2-arylbenzimidazoles and 2-arylbenzothiazoles in both room temperature and microwave condition catalyzed by hexamethylenetetramine–bromine complex. CHINESE CHEM LETT 2012. [DOI: 10.1016/j.cclet.2011.09.028] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Vibrational, nuclear magnetic resonance and electronic spectra, quantum chemical investigations of 2-amino-6-fluorobenzothiazole. J Mol Struct 2011. [DOI: 10.1016/j.molstruc.2011.09.015] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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An efficient copper(II)-catalyzed synthesis of benzothiazoles through intramolecular coupling-cyclization of N-(2-chlorophenyl)benzothioamides. Tetrahedron Lett 2010. [DOI: 10.1016/j.tetlet.2010.07.079] [Citation(s) in RCA: 63] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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PTSA catalyzed simple and green synthesis of benzothiazole derivatives in water. MONATSHEFTE FUR CHEMIE 2009. [DOI: 10.1007/s00706-009-0209-4] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Panicker CY, Varghese HT, Raj A, Raju K, Ertan-Bolelli T, Yildiz I, Temiz-Arpaci O, Granadeiro CM, Nogueira HIS. IR, Raman and SERS spectra of 2-phenoxymethylbenzothiazole. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2009; 74:132-139. [PMID: 19524483 DOI: 10.1016/j.saa.2009.05.022] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/22/2008] [Revised: 05/08/2009] [Accepted: 05/18/2009] [Indexed: 05/27/2023]
Abstract
The FT-IR and FT-Raman spectra of 2-phenoxymethylbenzothiazole were recorded and analyzed. The surface enhanced Raman scattering (SERS) spectrum was recorded in a silver colloid. The vibrational wavenumbers of the compound have been computed using the Hartree-Fock/6-31G* basis and compared with the experimental values. The appearance of the Ag-O stretching mode at 237cm(-1) in the SERS spectrum along with theoretically calculated atomic charge density, leads us to suggest that the molecule is adsorbed through the oxygen atom with the molecular plane tilted on the colloidal silver surface. The direction of charge transfer contribution to SERS has been discussed from the frontier orbital theory.
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Affiliation(s)
- C Yohannan Panicker
- Department of Physics, TKM College of Arts and Science, Kollam, Kerala, India.
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Rybaczyk LA, Bashaw MJ, Pathak DR, Huang K. An indicator of cancer: downregulation of monoamine oxidase-A in multiple organs and species. BMC Genomics 2008; 9:134. [PMID: 18366702 PMCID: PMC2311292 DOI: 10.1186/1471-2164-9-134] [Citation(s) in RCA: 55] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2007] [Accepted: 03/20/2008] [Indexed: 11/10/2022] Open
Abstract
Background Identifying consistent changes in cellular function that occur in multiple types of cancer could revolutionize the way cancer is treated. Previous work has produced promising results such as the identification of p53. Recently drugs that affect serotonin reuptake were shown to reduce the risk of colon cancer in man. Here, we analyze an ensemble of cancer datasets focusing on genes involved in the serotonergic pathway. Genechip datasets consisting of cancerous tissue from human, mouse, rat, or zebrafish were extracted from the GEO database. We first compared gene expression between cancerous tissues and normal tissues for each type of cancer and then identified changes that were common to a variety of cancer types. Results Our analysis found that significant downregulation of MAO-A, the enzyme that metabolizes serotonin, occurred in multiple tissues from humans, rodents, and fish. MAO-A expression was decreased in 95.4% of human cancer patients and 94.2% of animal cancer cases compared to the non-cancerous controls. Conclusion These are the first findings that identify a single reliable change in so many different cancers. Future studies should investigate links between MAO-A suppression and the development of cancer to determine the extent that MAO-A suppression contributes to increased cancer risk.
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Affiliation(s)
- Leszek A Rybaczyk
- Department of Biomedical Informatics, The Ohio State University, Columbus, OH, USA.
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Sato G, Asakura S, Hakura A, Tsutsui-Hiyoshi Y, Kobayashi N, Tsukidate K. Assessment of potential mutagenic activities of a novel benzothiazole MAO-A inhibitor E2011 using Salmonella typhimurium YG1029. Mutat Res 2000; 472:163-9. [PMID: 11113709 DOI: 10.1016/s1383-5718(00)00139-x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
The potential initiation activities of a novel monoamine oxidase type-A (MAO-A) inhibitor E2011, which induced preneoplastic foci in the rat liver, were investigated by comparing the mutagenic activity of E2011, 6-aminobenzothiazole (6-ABT, a structural scaffold of E2011) and its derivatives, which are suggested primary reactive metabolites for E2011-induced hepatotoxicity in the rats in vivo, in the Ames assay system employing two Salmonella tester strains, TA100 and YG1029, a bacterial O-acetyltransferase-overproducing strain of TA100. E2011, a tertiary amine, showed no mutagenic activity both in the Salmonella typhimurium TA100 and YG1029 with and without S9 mix. On the other hand, a secondary aromatic amine ER-174238-00, a typical decarbonated metabolite of E2011, showed weak but significant mutagenicity in YG1029 in the presence of S9 mix, and a primary aromatic amine ER-174237-00, an N-dealkylated derivative of ER-174238-00, exhibited S9-dependent potent mutagenicity in YG1029. Thus, it appears that primary and secondary amino moieties of benzothiazole derivatives at C(6)-position are the specific structures contributing to their mutagenic activity. In addition, the alkyl group at C(2)-position of E2011, ER-174237-00 and ER-174238-00 is suggested to intensify the mutagenic activity, since the mutagenicity of ER-174237-00 is approximately two-fold higher than that of 6-ABT, which has hydrogen at C(2)-position in the place of the alkyl group. These results strongly suggest that E2011 has potential initiation activities in the rat liver in vivo after undergoing decarbonation, one of the metabolic pathways, at the carbonyl moiety of oxazolidinone ring to form mutagenic amine(s).
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Affiliation(s)
- G Sato
- Exploratory Safety Assessment Research, Eisai Co. Ltd., 300-2635, Ibaraki, Japan.
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