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Journal articles on the topic 'Benzothiazolo'

Author: Grafiati

Published: 4 June 2021

Last updated: 27 July 2025

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1

Arafat, Mahmoud, Ehab Abdel-Latif, Fathy M. El-Taweel, Seif-Eldin N. Ayyad, and Khaled S. Mohamed. "Synthesis and biological assessment of new benzothiazolopyridine and benzothiazolyl- triazole derivatives as antioxidant and antibacterial agents." Bulletin of the Chemical Society of Ethiopia 36, no. 2 (2022): 451–63. http://dx.doi.org/10.4314/bcse.v36i2.17.

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ABSTRACT. A novel series of benzothiazolopyridine derivatives was synthesized via interaction of -2-(benzothiazol-2-yl)-3-(4-chlorophenyl)acrylonitrile (2) with a diverse of commercially available reagents (indandione, thiobarbituric acid, and malononitrile). Moreover, a novel group of benzothiazole linked substituted 1,2,3-triazole derivatives were synthesized by exploring the chemical behavior of 5-benzothiazolyl-2-(4-chlorophenyl)-triazol-4-amine through refluxing in glacial acetic acid, condensation with phthalic anhydride, and cyanoacetylation reactions. All newly synthetized compounds ha

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2

Sridevi, CH, K. Balaji, A. Naidu, and R. Sudhakaran. "Antimicrobial Evaluation and Synthesis of Some Phenylpyrazolo benzothiazolo quinoxaline Derivatives." E-Journal of Chemistry 6, no. 3 (2009): 866–70. http://dx.doi.org/10.1155/2009/324358.

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2,3-Diphenyl quinoxaline(SI)was fused with 2-amino benzothiazoles(SII)by a methylene bridge, which was then allowed for acetylation. The acetylated product (SIV) was made to react with different aromatic aldehydes to give chalcones(SV1-SV5). Chalcones refluxed with substituted acid hydrazides to afford different phenyl pyrazolo benzothiazolo quinoxaline derivatives(SVI1-SVI15). The structure of chalcones and phenyl pyrazolo benzothiazolo quinoxaline derivatives were confirmed by M.P, TLC and spectral data. All the synthesized compounds were screened for their antimicrobial activities.

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3

Refat, Hala M., and Khaled S. Mohamed. "Efficient and convenient synthesis of pyrido [2,1-b]benzothiazole, pyrimidopyrido[2,1-b]benzothiazole and benzothiazolo[3,2-a][1,8]naphthyridine derivatives." Heterocyclic Communications 21, no. 4 (2015): 219–24. http://dx.doi.org/10.1515/hc-2015-0018.

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AbstractNew 3-aryl-pyrido[2,1-b][1,3]benzothiazole derivatives 2a–e were synthesized in excellent yields via the reaction of benzothiazoleacetonitrile (1) with different aromatic aldehydes. The treatment of 2-(benzo[d]thiazol-2-yl)-3-(pyridin-4-yl)acrylonitrile (6) with malononitrile afforded 1-amino-3-(pyridin-4-yl)-3H-pyrido[2,1-b][1,3]benzothiazole-2,4-dicarbonitrile (7), which was allowed to react with a variety of reagents to provide pyrimido[5′,4′:5,6]pyrido[2,1-b][1,3]benzothiazole 8, 9 and [1,3]benzothiazolo[3,2-a][1,8]naphthyridine 10, 15 derivatives. All synthesized products were con

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4

Sathe, B. S., E. Jaychandran, G. M. Sreenivasa, and V. A. Jagtap. "Antimycobacterial Activity of Some Synthesized Fluorinated Benzothiazolo Imidazole Compounds." E-Journal of Chemistry 8, no. 2 (2011): 830–34. http://dx.doi.org/10.1155/2011/581429.

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4-Fluoro-3-chloroanilline treated with potassium thiocyanate in presence of glacial acetic acid and bromine was converted into 2-amino-6-fluoro-7-chlorobenzothiazole, resulting into 2-amino benzothiazole. The synthesized compound in presence of 2-phenyl-4-benzylidine-5-oxazolinone refluxed in pyridine to obtain 2-(2-phenyl-4-benzylidenyl-5-oxo-imidazolin-1-yl amino)-6-fluoro-7-substituted(1,3)benzothiazoles. The above said compound was treated withortho, metaandpara nitroanillines, ortho, meta, parachloroanillines, morpholino, piperazine, diphenylamine in the presence of DMF to obtain differen

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5

K., S. Panpaliya* D. T. Tayade R. S. Shaikh. "SYNTHESIS OF 1-O-TOLYL-3-SUBSTITUTED-2,6-DITHIO-4-AMINO -[(2-O-TOLYLTHIOCARBAMIDO)-1,3-BENZOTHIAZOLO] -1,3,5-TRIAZINE." Indo American Journal of Pharmaceutical Sciences 04, no. 12 (2018): 4822–25. https://doi.org/10.5281/zenodo.1134392.

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We reported synthesis of 1-o-tolyl-3-substituted-2,6-dithio-4-amino-[(2-o-tolylthiocarbamido)-1,3-benzothiazolo] -1,3,5-triazines by isomerisation of 2-substituted-imino-6-o-tolylimino-4-[(2-o-tolylthiocarbamido)-1,3 -benzothiazolo]-1,3,5-dithiazines in 10 % aqueous ethanolic sodium bicarbonate mixture in ethanol solvent. The structure determination and justification of the synthesized compounds were done on the basis of elemental analysis, chemical characteristics and spectral studies. Keywords:2-substituted-imino-6-o-tolylimino-4-[(2-o-tolylthiocarbamido)-1,3-benzothiazolo]-1,3,5-dithiazines

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6

Ushakova, A. A., V. V. Fedotov, I. I. Butorin, E. N. Ulomsky, and V. L. Rusinov. "Benzothiazolo[3,2-a]pyrimidines and benzothiazolo[3,2-a]purines: synthesis and bioactivity prediction." Russian Chemical Bulletin 73, no. 8 (2024): 2316–25. http://dx.doi.org/10.1007/s11172-024-4355-y.

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7

Abdullah, Ahmad H., Jalal A. Zahra, Salim S. Sabri, et al. "Thiophene Ring-opening Reactions III: One-Pot Synthesis and Antitumor Activity of 1,3,4-Thiadiazoline–Benzothiazolo[3,2-b]pyridazine Hybrids†." Current Organic Synthesis 19, no. 2 (2022): 279–90. http://dx.doi.org/10.2174/1570179418666211109112148.

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Introduction: The preparation of model 6-chloro-5-nitrothieno[2,3-c]pyridazines incorporating (2'-halo-5'-nitrophenyl) entity is described. Interaction of these substrates with N'-(aryl)benzothiohydrazides, in the presence of triethylamine, followed a formal [4+1] annulation, furnishing the respective 1,3,4-thiadiazoline–benzothiazolo [3,2-b]pyridazine hybrids directly. This one-pot synthesis implies thiophene ring-opening and two consecutive intramolecular cyclizations. The structures of the synthesized new hybrids are supported by MS, NMR, and IR spectral data and further confirmed by single

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8

Kriplani, Prashant, Pawan Swarnkar, Rinku Maheshwari, and K. G. Ojha. "Microwave Assisted Synthesis of Some Biologically Active Benzothiazolotriazine Derivatives." E-Journal of Chemistry 3, no. 4 (2006): 307–12. http://dx.doi.org/10.1155/2006/486723.

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Synthesis of some biologically active benzothiazolotriazine derivatives by microwave irradiation is reported. 2-Amino-6-substituted benzothiazoles1on treatment with benzaldehyde in anhydrous ethanol afforded 2-benzylidenoimino-6-substitutedbenzothiazoles2which underwent cyclisation with ammoniumthiocyanate in dioxane to give 2-phenyl benzothiazolo [3,2-α]-s-triazine-4-[3H] thiones3.These both steps were carried out in microwave. Compound3with benzoyl chloride in anhydrous pyridine gave 2-phenyl-3-(benzoyl) benzothiazolo [3,2-α]-s-triazine-4-thiones4in good yields. The structure of all these co

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9

Liu, Kang-Chien, and Ling-Yih Hsu. "Zur Darstellung eines 12H-Benzothiazolo[2,3-b]chinazolin-Derivats. Synthesis of a 12H-Benzothiazolo[2,3-b]quinazoline Derivative." Archiv der Pharmazie 320, no. 6 (1987): 569–71. http://dx.doi.org/10.1002/ardp.19873200617.

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10

Khoobi, M., A. Ramazani, A. R. Foroumadi, H. Hamadi, Z. Hojjati, and A. Shafiee. "Efficient microwave-assisted synthesis of 3-benzothiazolo and 3-benzothiazolino coumarin derivatives catalyzed by heteropoly acids." Journal of the Iranian Chemical Society 8, no. 4 (2011): 1036–42. http://dx.doi.org/10.1007/bf03246560.

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11

Zonjić, Iva, Lidija-Marija Tumir, Ivo Crnolatac, et al. "Recognition of ATT Triplex and DNA:RNA Hybrid Structures by Benzothiazole Ligands." Biomolecules 12, no. 3 (2022): 374. http://dx.doi.org/10.3390/biom12030374.

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Interactions of an array of nucleic acid structures with a small series of benzothiazole ligands (bis-benzothiazolyl-pyridines—group 1, 2-thienyl/2-benzothienyl-substituted 6-(2-imidazolinyl)benzothiazoles—group 2, and three 2-aryl/heteroaryl-substituted 6-(2-imidazolinyl)benzothiazoles—group 3) were screened by competition dialysis. Due to the involvement of DNA:RNA hybrids and triplex helices in many essential functions in cells, this study’s main aim is to detect benzothiazole-based moieties with selective binding or spectroscopic response to these nucleic structures compared to regular (no

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12

K. Jassim, Ibtisam, Sawsan S. Harth, Rua M. Dhedan, and Ali Obais Abd. "Synthesis and study the biological activity of some six, five and fused ring heteroatome systems derived from 2-mercapto benzothiazole." Tikrit Journal of Pharmaceutical Sciences 8, no. 1 (2023): 96–105. http://dx.doi.org/10.25130/tjphs.2012.8.1.12.96.105.

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In this paper ,new series of 2-hydrazino benzothiazole [1], 2-N-benzothiazole-N`-phenyl hydrazine carboxamide [2], 2-N-[(3)-N`-phenyl-5-(p-bromophenyl)-2`-hydroxy-1,3-oxazolin-2`-yl] benzothiazol hydrazine [3] , 2-N-benzothiazole-N`-1-naphthyl hydrazine carboxamide [4], 2-N-[(3`)-N`-(1-naphthyl)-5`-(p-bromo phenyl)-2`-hydroxy-1,3-oxazolin-2`-yl)] benzothiazol hydrazine [5], of 2-thiaacetic acid benzothiazole [6] ,2-thiaacetyl chloride benzothiazole [7], 5-amino-2-mercapto-1,3,4-thiadiazole [8], of 2-mercapto-[5-acetamid thiamethyl benzothiazol]-1,3,4-thiadiazole [9], 2-phenyl-5-chloromethyl-1,

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13

Narayanan, Ponmudisettu, Subramani Karthikeyan, Panayancheri Coleppa Srinivasan, and Krishnan Sethusankar. "7H-[1,2]Benzothiazolo[3,2-b]quinazoline 5,5-dioxide." Acta Crystallographica Section E Structure Reports Online 68, no. 11 (2012): o3082. http://dx.doi.org/10.1107/s1600536812040871.

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14

Kumar, Bharat, Vishal Pathak, Sushma Rani, Ravi Kant, and Tiwari IC. "Synthesis and spectral characterization of some bromo-benzothiazolo pyrazolines." International Journal of Chemical Research 2, no. 1 (2010): 25–27. http://dx.doi.org/10.9735/0975-3699.2.1.25-27.

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15

IC, Tewari, Bharat Kumar, Vishal Pathak, Sushma Rani, and Ravi Kant. "Synthesis and antimicrobial activity of some bromo-benzothiazolo pyrazolines." International Journal of Microbiology Research 1, no. 2 (2009): 20–22. http://dx.doi.org/10.9735/0975-5276.1.2.20-22.

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16

Višņevska, J., E. Jaščenko, I. Šestakova, A. Gulbe, and E. Ābele. "Unusual Synthesis and Cytotoxicity of N-[2-(Benzothiazol-2-Sulfonyl)-1-Ethoxyethoxy]- 5-(Benzothiazol-2-Ylsulfanyl)Pentanamidine." Latvian Journal of Chemistry 51, no. 1-2 (2012): 149–53. http://dx.doi.org/10.2478/v10161-012-0003-1.

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Unusual Synthesis and Cytotoxicity of N-[2-(Benzothiazol-2-Sulfonyl)-1-Ethoxyethoxy]- 5-(Benzothiazol-2-Ylsulfanyl)PentanamidineAddition of N-hydroxy-5-(benzothiazolylthio)pentanamidine toE-2-(2-chlorovinylsulfonyl)benzothiazole in the presence of NaH was studied. The main product of reaction - N-[2-(benzothiazol-2-sulfonyl)-1-ethoxyethoxy]-5-(benzothiazol-2-ylsulfanyl)pentanamidine exhibits high cytotoxicity.

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17

Sankar, T., S. Naveen, N. K. Lokanath, and K. Gunasekaran. "Crystal structure of (2-methyl-4-phenyl-4H-benzo[4,5]thiazolo[3,2-a]pyrimidin-3-yl)(phenyl)methanone." Acta Crystallographica Section E Crystallographic Communications 71, no. 5 (2015): o276—o277. http://dx.doi.org/10.1107/s2056989015006428.

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In the title compound, C24H18N2OS, the pyrimidine ring has a flat envelope conformation with the methine C atom as the flap. The attached phenyl and benzoyl rings are inclined to the mean plane of the pyrimidine ring by 84.87 (8) and 75.33 (9)°, respectively. The benzothiazolo group is planar (r.m.s. deviation = 0.009 Å) and inclined to the mean plane of the pyrimidine ring by 3.27 (6)°. In the crystal, molecules are linked by pairs of C—H...N hydrogen bonds, forming inversion dimers.

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18

Lácová, Margita, Nguyen Thi Nga, and Ján Halgaš. "Vilsmeier-Haack reaction of 2-amino-X-benzothiazoles with N-phenylformamide in the presence of benzenesulfonyl chloride." Collection of Czechoslovak Chemical Communications 53, no. 2 (1988): 311–18. http://dx.doi.org/10.1135/cccc19880311.

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2-Amino-X-benzothiazoles (X = H, 4-Cl, 6-Cl, 6-NO2, 6-CH3, 6-OCH3, 6-Br) react with N-phenylformamide and two equivalents of benzenesulfonyl chloride in pyridine, affording different products in dependence on the substituent X: N-(X-2-benzothiazolyl)formamidines, N-phenyl-N’-(X-2-benzothiazolyl)formamidines, N-phenyl-N’,N’’-bis(X-2-benzothiazolyl)triaminomethanes, N-(X-2-benzothiazolyl)benzenesulfonamides and N-2-((X-3-phenyliminomethyl)-benzothiazolylidene)benzenesulfonamides. In the presence of one equivalent of benzenesulfonyl chloride, benzothiazoles I either do not react or are partially

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19

Mourtas, Spyridon, Vasileios Athanasopoulos, Dimitrios Gatos, and Kleomenis Barlos. "Solid-Phase Synthesis of 2-Benzothiazolyl and 2-(Aminophenyl)benzothiazolyl Amino Acids and Peptides." Molecules 28, no. 14 (2023): 5412. http://dx.doi.org/10.3390/molecules28145412.

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2-benzothiazoles and 2-(aminophenyl)benzothiazoles represent biologically interesting heterocycles with high pharmacological activity. The combination of these heterocycles with amino acids and peptides is of special interest, as such structures combine the advantages of amino acids and peptides with the advantages of the 2-benzothiazolyl and 2-(aminophenyl)benzothiazolyl pharmacophore group. In this work, we developed an easy and efficient method for the solid-phase synthesis of 2-benzothiazolyl (BTH) and 2-(aminophenyl)benzothiazolyl (AP-BTH) C-terminal modified amino acids and peptides with

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20

Dhakoniya, Pallavi. "Synthesis and Characterization of Benzylidene Derivatives of Benzothiazole." International Journal for Research in Applied Science and Engineering Technology 9, no. VIII (2021): 506–11. http://dx.doi.org/10.22214/ijraset.2021.37370.

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A series of some novel benzothiazole derivatives were synthesized from the 2-(4-aminophenyl) benzothiazol-5-ol, which was synthesized by the Jacobson method using Lawesson’s reagent. Benzylidene derivatives (P201-P205) were synthesized by catalyzed condensation and acylation method,named as 2-(4-((4 hydroxybenzylidene)amino) phenyl) benzothiazole-5-ol (P201), 2-(4-((4- methoxybenzylidene) amino)phenyl)benzothiazole-5ol(P202),2-(4-((4-chlorobenzylidene) amino)phenyl)benzothiazole-5-ol(P203), (4-((furan-2-ylmethylene) amino)phenyl)benzothiazole-5-ol(P204), Dimethyl(4(5hydroxy benzothiazol2yl)phe

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21

Zou, Yue, Yong Zhang, Xing Liu, et al. "Research Progress of Benzothiazole and Benzoxazole Derivatives in the Discovery of Agricultural Chemicals." International Journal of Molecular Sciences 24, no. 13 (2023): 10807. http://dx.doi.org/10.3390/ijms241310807.

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Benzoxazole and benzothiazole have a broad spectrum of agricultural biological activities, such as antibacterial, antiviral, and herbicidal activities, which are important fused heterocyclic scaffold structures in agrochemical discovery. In recent years, great progress has been made in the research of benzoxazoles and benzothiazoles, especially in the development of herbicides and insecticides. With the widespread use of benzoxazoles and benzothiazoles, there may be more new products containing benzoxazoles and benzothiazoles in the future. We systematically reviewed the application of benzoxa

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22

Kloepfer, A., R. Gnirss, M. Jekel, and T. Reemtsma. "Occurrence of benzothiazoles in municipal wastewater and their fate in biological treatment." Water Science and Technology 50, no. 5 (2004): 203–8. http://dx.doi.org/10.2166/wst.2004.0329.

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A number of 2-substituted benzothiazoles that are known to be used as fungicides, corrosion inhibitors and vulcanization accelerators in industry have been analyzed in municipal wastewater and the effluents of activated sludge and membrane bioreactor (MBR) treatment over a three month period. All six analytes were regularly detected in the municipal wastewater by liquid chromatography-mass spectrometry and amount to a total concentration of 3.4 μg/L. Of these compounds benzothiazole-2-sulfonic acid (1,700 ng/L), benzothiazole (850 ng/L) and 2-hydroxybenzothiazole (500 ng/L) were most prominent

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23

El-Sherbeny, Magda A. "ChemInform Abstract: Synthesis of Certain Pyrimido[2,1-b]benzothiazole and Benzothiazolo[2,3-b]quinazoline Derivatives for in vitro Antitumor and Antiviral Activities." ChemInform 32, no. 2 (2001): no. http://dx.doi.org/10.1002/chin.200102149.

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24

Le Bozec, Lucille, and Christopher J. Moody. "Naturally Occurring Nitrogen–Sulfur Compounds. The Benzothiazole Alkaloids." Australian Journal of Chemistry 62, no. 7 (2009): 639. http://dx.doi.org/10.1071/ch09126.

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Several alkaloids contain both nitrogen and sulfur, and a subset of these interesting terrestrial and marine natural products – the benzothiazoles – forms the subject of the present short review. Benzothiazole alkaloids are relatively rare in Nature, but they range in structural complexity from benzothiazole itself and simple derivatives thereof, through the well-known firefly luciferin, to more complex molecules such as the thiazo-rifamycins and the dercitin-kuanoniamine family. Although the biosynthesis of benzothiazoles has not been studied in many cases, the evidence suggests that they are

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25

Low, John Nicolson, Justo Cobo, Manuel Nogueras, Adolfo Sánchez, Jairo Quiroga, and Pedro Hernández. "11-Chloro-5,7-dihydro-6H-benzothiazolo[2,3-b]benzo[h]quinazoline." Acta Crystallographica Section E Structure Reports Online 57, no. 10 (2001): o937—o938. http://dx.doi.org/10.1107/s1600536801014787.

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26

Chu, Daniel T. W., Prabhavathi B. Fernandes, and Andre G. Pernet. "Synthesis and biological activity of benzothiazolo[3,2-a]quinolone antibacterial agents." Journal of Medicinal Chemistry 29, no. 8 (1986): 1531–34. http://dx.doi.org/10.1021/jm00158a037.

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27

Chumakov, Yu M., A. Yu Paholnitcaia, P. A. Petrenko, V. I. Tsapkov, D. Poirier, and A. P. Gulea. "Crystal structures of nitrato-{2-[2-(1-pyridine-2-ylethylidene)hydrazine]-1,3-benzothiazolo}aquacopper and chloro-{2-[2-phenyl(pyridine-2-ylethylidene)hydrazine]-1,3-benzothiazolo}copper." Crystallography Reports 60, no. 1 (2015): 75–82. http://dx.doi.org/10.1134/s1063774515010071.

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28

Satish, Kittur* Venkatesh Hanumanthachar Joshi. "A REVIEW ON FLURO-SUBSTITUED BENZOTHIOZOLES: A NEW PROFILE OF BIOLOGICAL ACTIVITIES." Indo American Journal of Pharmaceutical Sciences 05, no. 01 (2018): 130–34. https://doi.org/10.5281/zenodo.1136528.

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Benzothiazoles are an important class of bioactive & industrially important organic compounds recently; heterocyclic compounds analogues and their derivatives have attracted strong interest in medicinal chemistry due to their biological and pharmacological properties. Heterocyclic compounds analogues and their derivatives have attracted strong interest due to their biological and Pharmacological properties. Benzothiazoles are bicyclic ring system. A number of 2‐Aminobenzothiazoles have been studied as central muscle relaxants and found to interfere with glutamate neurotransmission in bioch

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29

P., ANITHA, SRIDEVI G., and KONDAL REDDY K. "Synthesis of 1-Benzothiazol-2-yl-2-arylimino-striazolo [ 5, 1-b ]benzothiazoles." Journal of Indian Chemical Society Vol. 72, Apr 1995 (1995): 257–59. https://doi.org/10.5281/zenodo.5902215.

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Department of Chemistry, Osmania University, Hyderabad-500 007 <em>Manuscript received 19 October 1993, accepted 20 December 1993</em> <em>N</em>-Aryl-<em>N',N"</em>-bis(benzothiazol-2-yl)guanidines have been obtained by the reaction of <em>N</em>-aryl-<em>N'</em>-benzothiazol-2-ylthioureas (1) with lead oxide. Oxidative cyclisation of N-aryl-<em>N'</em> ,<em>N"</em>-bis(benzothiazol-2-yl)guanidines (2) by lead tetraacetate led to the formation of 1-benzothiazol-2-yl-2-arylimino-s-triazolo[5,1-b]benzothiazoles (5).

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30

Ni, Qijian, Xiaoxiao Song, Jiawen Xiong, Gerhard Raabe, and Dieter Enders. "Regio- and stereoselective synthesis of benzothiazolo-pyrimidinones via an NHC-catalyzed Mannich/lactamization domino reaction." Chemical Communications 51, no. 7 (2015): 1263–66. http://dx.doi.org/10.1039/c4cc08594a.

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31

Amosova, Svetlana V., Vladimir A. Shagun, Nataliya A. Makhaeva, Irina A. Novokshonova, and Vladimir A. Potapov. "Quantum Chemical and Experimental Studies of an Unprecedented Reaction Pathway of Nucleophilic Substitution of 2-Bromomethyl-1,3-thiaselenole with 1,3-Benzothiazole-2-thiol Proceeding Stepwise at Three Different Centers of Seleniranium Intermediates." Molecules 26, no. 21 (2021): 6685. http://dx.doi.org/10.3390/molecules26216685.

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The results of quantum chemical and experimental studies of the reaction of 2-bromomethyl-1,3-thiaselenole with 1,3-benzothiazole-2-thiol made it possible to discover the unprecedented pathway of this reaction, which proceeds stepwise at three different centers of seleniranium intermediates. The first stage includes an attack of thiolate anion at the selenium atom of the seleniranium cation accompanied by ring opening with the formation of (Z)-2-[(1,3-benzothiazol-2-ylsulfanyl)selanyl]ethenyl vinyl sulfide, which is converted to six-membered heterocycle, 2-(2,3-dihydro-1,4-thiaselenin-2-ylsulf

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32

Pihlaja, Kalevi, Reijo Sillanpää, Géza Stájer, et al. "X-Ray Study of a Pentacyclic Partially Saturated Benzothiazolo[2,3-a]isoindolone." Acta Chemica Scandinavica 46 (1992): 1021–23. http://dx.doi.org/10.3891/acta.chem.scand.46-1021.

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33

Muthusamy, S., and V. T. Ramakrishnan. "A Facile Photochemical Synthesis of 12H-Benzothiazolo [2,3-b]Quinazolin-12-Ones." Synthetic Communications 22, no. 4 (1992): 519–33. http://dx.doi.org/10.1080/00397919208019251.

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34

Anuba, C., and T. F. Abbs Fen Reji. "Synthesis, Characterization and Biological Activities of Substituted 1-[Benzothiazol-(1H)-2-yl]-3-phenyl-prop-2-en-1-ones." Asian Journal of Organic & Medicinal Chemistry 4, no. 3 (2019): 144–46. http://dx.doi.org/10.14233/ajomc.2019.ajomc-p181.

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A series of ortho and para substituted 1-[benzothiazol-(1H)-2-yl]-3-phenyl-prop-2-en-1-one derivatives were synthesized from 2-acetyl benzothiazole and ortho and para-substituted benzaldehye using ethanol as solvent. The synthesized compounds were characterized by UV-visible, FT-IR, 1H NMR and mass spectrometry. Antioxidant activities of synthesized compounds have been evaluated by DPPH free radical scavenging activity using ascorbic acid as standard. The standard solution and 1-[benzothiazol- (1H)-2-yl]-3-phenylprop-2-en-1-ones compounds were prepared with different concentrations. Anticancer

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Quiroga, Jairo, Pedro Hernández, Braulio Insuasty, et al. "Control of the reaction between 2-aminobenzothiazoles and Mannich bases. Synthesis of pyrido[2,1-b][1,3]benzothiazoles versus [1,3]benzothiazolo[2,3-b]quinazolines." Journal of the Chemical Society, Perkin Transactions 1, no. 4 (January 23, 2002): 555–59. http://dx.doi.org/10.1039/b109676a.

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36

Yavari, Issa, Kiyana Ghafouri, Maryam Naeimabadi, and Mohammad Halvagar. "A Synthesis of Functionalized 2-Indolizin-3-yl-1,3-benzothiazoles from 1-(1,3-Benzothiazol-2-ylmethyl)pyridinium Iodide and Acetylenic Esters." Synlett 29, no. 02 (2017): 243–45. http://dx.doi.org/10.1055/s-0036-1590910.

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Functionalized 2-indolizin-3-yl-1,3-benzothiazoles were obtained in moderate yields from the reaction between 1-(1,3-benzothiazol-2-ylmethyl)pyridinium iodide and acetylenic esters in acetonitrile. When isoquinoline was used under similar conditions, dialkyl 3-(1,3-benzothiazol-2-yl)pyrrolo[2,1-a]isoquinoline-1,2-dicarboxylates were obtained. The structures of these products have been confirmed by X-ray diffractometry.

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37

Schroeder, Zachary W., L. K. Hiscock, and Louise Nicole Dawe. "Copper(II)- and gold(III)-mediated cyclization of a thiourea to a substituted 2-aminobenzothiazole." Acta Crystallographica Section C Structural Chemistry 73, no. 11 (2017): 905–10. http://dx.doi.org/10.1107/s205322961701381x.

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Benzothiazole derivatives are a class of privileged molecules due to their biological activity and pharmaceutical applications. One route to these molecules is via intramolecular cyclization of thioureas to form substituted 2-aminobenzothiazoles, but this often requires harsh conditions or employs expensive metal catalysts. Herein, the copper(II)- and gold(III)-mediated cyclizations of thioureas to substituted 2-aminobenzothiazoles are reported. The single-crystal X-ray structures of the thiourea N-(3-methoxyphenyl)-N′-(pyridin-2-yl)thiourea, C13H13N3OS, and the intermediate metal complexes aq

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Zhang, Chao, Juan Xu, Xinyu Zhao, and Congmin Kang. "Synthesis of Novel 3-(Benzothiazol-2-Ylmethylene)Indolin-2-Ones." Journal of Chemical Research 41, no. 9 (2017): 537–40. http://dx.doi.org/10.3184/174751917x15040891974776.

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A mild method for the synthesis of 3-(benzothiazol-2-ylmethylene)indolin-2-ones via the aldol condensation of substituted indolin-2-ones and benzothiazole-2-carbaldehyde is described. This new procedure has significant advantages, such as mild conditions, high yields and simple work-up.

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M., B. Deshmukh, S. Jagtap S., A. Deshmukh S., D. Jadhav S., V. Anbhule P., and W. Suryawanshi A. "Synthesis and biological activity of some benzothiazolyl thiazolidinones." Journal of Indian Chemical Society Vol. 84, May 2007 (2007): 498–500. https://doi.org/10.5281/zenodo.5820289.

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Department of Chemistry, Shivaji University, Kolhapur-416 004, Maharashtra, India <em>E-mail</em> : m_deshmukhl@rediffmail.com <em>Manuscript received 1 June 2006, accepted 22 March 2007</em> A facile route for the synthesis of some thiazolidinone derivatives incorporating a benzothiazole moiety has been reported. <em>S</em>-(2-Propanoyl)-1,3-benzothiazole (2) was synthesized by reacting 2-mercapto benzothiazole with chloroacetone in dry acetone, which was subsequently reacted with substituted aryl hydrazides to give the corresponding hydrazones (3}. These on cyclocondensation with mercaptoace

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Bunev, Alexander S., Elena V. Sukhonosova, Vladimir E. Statsyuk, Gennady I. Ostapenko, and Victor N. Khrustalev. "3-Bromo-2-[4-(methylsulfanyl)phenyl]-5,6,7,8-tetrahydro-1,3-benzothiazolo[3,2-a]imidazole." Acta Crystallographica Section E Structure Reports Online 70, no. 5 (2014): o596—o597. http://dx.doi.org/10.1107/s1600536814008976.

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In the title molecule, C16H15BrN2S2, the central imidazo[2,1-b]thiazole fragment is almost planar (r.m.s. deviation = 0.012 Å), and the fused 5,6,7,8-tetrahydrobenzene ring adopts an unsymmetrical half-chair conformation. The dihedral angle between the imidazo[2,1-b]thiazole and benzene planes is 18.25 (4)°. The terminal methylsulfanyl substituent lies practically within the benzene plane [the dihedral angle between the corresponding planes is 7.20 (10)°] and is turned toward the C—Br bond. In the crystal, molecules form infinite chains along [100]viasecondary Br...N interactions [3.1861 (16)

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Shaabani, Ahmad, Abbas Rahmati, and Jafar Moghimi Rad. "Ionic liquid promoted synthesis of 3-(2′-benzothiazolo)-2,3-dihydroquinazolin-4(1H)-ones." Comptes Rendus Chimie 11, no. 6-7 (2008): 759–64. http://dx.doi.org/10.1016/j.crci.2007.11.007.

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Janani, Marzieh, Masumeh Abdoli Senejani, and Tahereh Momeni Isfahani. "An Efficient Synthesis of Benzimidazole and Benzothiazole Derivatives Using a Nickel(II) Metal-Organic Framework." Current Organic Synthesis 17, no. 2 (2020): 109–16. http://dx.doi.org/10.2174/1570179417666200117110758.

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Background: The benzimidazoles and benzothiazoles have shown relatively high pharmaceutical and biological activities. In recent years, numerous methods have been developed for synthesis of benzimidazole and benzothiazole derivatives using different catalysts. However, only some of the reported procedures are quite satisfactory and most of them have drawbacks. Herein, we report a convenient method for synthesis of benzimidazole and benzothiazole derivatives using a nickel (II) metal-organic framework (Ni- MOF) as a novel and reusable catalyst. The presence of unsaturated metal centers makes me

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Lamkane, Rachana B., Priyanka M. Khadasare, Pooja M. Shinde, et al. "Synthesis and Biological Screening of Novel Derivatives of Benzothiazol as Anticonvulsant Agents." SAR Journal of Medical Biochemistry 4, no. 01 (2023): 6–15. http://dx.doi.org/10.36346/sarjmb.2023.v04i01.002.

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The Benzothiazole ring system belongs to a much studied class of compound. In the last few decades, the chemistry of benzothiazole and their fused heterocyclic derivatives have received considerable attention owing to their significant and effective biological activity. The present study aimed to design and synthesize novel derivatives of bezothiazole obtained from 3-chloro-4-flouro aniline treated with potassium thiocynide with chloro acetyl chloride gives (7-chloro-6-fluro-1,3-benzothiazol-2-yl) acetyl chloride which is converted into hydrazide and yields the resultant compound derivatives o

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Matamoros, Víctor, Eric Jover, and Josep M. Bayona. "Occurrence and fate of benzothiazoles and benzotriazoles in constructed wetlands." Water Science and Technology 61, no. 1 (2010): 191–98. http://dx.doi.org/10.2166/wst.2010.797.

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A suite of benzothiazoles and benzotriazoles was analysed by comprehensive multi-dimensional gas chromatography coupled to time-of-flight mass spectrometry in four different wastewater treatment systems. The selected wastewater treatment systems include one conventional wastewater treatment plant (WWTP) and for the first time, two constructed wetlands. Although benzothiazole (BT), 2-(methylthio)benzothiazole (MTBT), 2-hydroxybenzothiazole (OHBT) and benzotriazole (BTri) occurred in all the raw wastewater samples, 4- and 5-methylbenzotriazoles (4- and 5-TTri) were only detected in the industria

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Lácová, Margita, and Nguyen Thi Nga. "The synthesis and reactions of trisubstituted N-(X-2-benzothiazolyl)formamidines." Collection of Czechoslovak Chemical Communications 52, no. 4 (1987): 1006–14. http://dx.doi.org/10.1135/cccc19871006.

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The modified Vilsmeier-Haack reagent ANC(O)H-ClSO2C6H5 (A = (CH3)2, (C2H5)2, (CH2)5, CH2CH2OCH2CH2) reacts with 2-amino-X-benzothiazole in pyridine and ether to give three types of products in high yields depending on the character of substituents A and X. Isolated were: N,N-dialkyl-N'-(X-2-benzothiazolyl)formamidines, N,N'-bis(X-2-benzothiazolyl)formamidines, and N,N-dialkyl-N',N´´-bis(X-2-benzothiazolyl)triaminomethanes. Investigated were the conditions and reaction products of N,N-dialkyl-N',N´´-bis(X-2-benzothiazolyl)triaminomethanes with phenylethanoyl, phenoxyethanoyl, 4-chlorophenoxyeth

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46

Dai, Yanling, Chen Xie, Lingmin Wu, et al. "Asymmetric synthesis of amino-benzothiazol derivatives by additions of 2-lithiated benzothiazoles to (S)-N-t-butylsulfinyl-ketimines." RSC Advances 5, no. 5 (2015): 3491–97. http://dx.doi.org/10.1039/c4ra15405c.

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We reported the asymmetric Mannich reactions between lithium-benzothiazoles and (S)-N-tert-butanesulfinylketimines, which gave unknown type of amino-benzothiazol derivatives of high pharmaceutical potential with up to 96% yields and 99 : 1 diastereoselectivities.

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Rosales Hernández, Martha Cecilia, Marycruz Olvera-Valdez, Jazziel Velazquez Toledano, Jessica Elena Mendieta Wejebe, Leticia Guadalupe Fragoso Morales та Alejandro Cruz. "Exploring the Benzazoles Derivatives as Pharmacophores for AChE, BACE1, and as Anti-Aβ Aggregation to Find Multitarget Compounds against Alzheimer’s Disease". Molecules 29, № 19 (2024): 4780. http://dx.doi.org/10.3390/molecules29194780.

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Despite the great effort that has gone into developing new molecules as multitarget compounds to treat Alzheimer’s disease (AD), none of these have been approved to treat this disease. Therefore, it will be interesting to determine whether benzazoles such as benzimidazole, benzoxazole, and benzothiazole, employed as pharmacophores, could act as multitarget drugs. AD is a multifactorial disease in which several pharmacological targets have been identified—some are involved with amyloid beta (Aβ) production, such as beta secretase (BACE1) and beta amyloid aggregation, while others are involved w

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Quiroga, Jairo, Pedro Hernandez, Braulio Insuasty, et al. "ChemInform Abstract: Control of the Reaction Between 2-Aminobenzothiazoles and Mannich Bases. Synthesis of Pyrido[2,1-b][1,3]benzothiazoles versus [1,3]Benzothiazolo[2,3-b]quinazolines." ChemInform 33, no. 25 (2010): no. http://dx.doi.org/10.1002/chin.200225032.

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Qadir, Tanzeela, Andleeb Amin, Alka Salhotra, Praveen Kumar Sharma, Ishtiaq Jeelani, and Hitoshi Abe. "Recent Advances in the Synthesis of Benzothiazole and its Derivatives." Current Organic Chemistry 26, no. 2 (2022): 189–214. http://dx.doi.org/10.2174/1385272826666211229144446.

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Abstract: Benzothiazoles have recognized pharmacophores in the field of research, predominantly in synthetic and medicinal chemistry, on account of their significant pharmaceutical properties. This important class of derivatives endows an extensive range of biological activities like anti-inflammatory, antidiabetic, anticancer, anticonvulsant, antibacterial, antiviral, antioxidant, antituberculosis, enzyme inhibitors, etc. Hence, various methodologies have been accomplished to synthesize benzothiazole compounds considering the purity, yield, and selectivity of the products. This review provide

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Kalyankar, Balasaheb D., Prashant N. Ubale, and Sambhaji P. Vartale. "A convenient route for synthesis and antimicrobial evaluation of bis (diimino benzothiazolo pyrimido pyrimidines)." Oriental Journal of Chemistry 30, no. 4 (2014): 1877–82. http://dx.doi.org/10.13005/ojc/300448.

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