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Garia A, Kumar S, Jain N. SelectfluorTM Mediated Tandem Fluorination and 1,3‐Carbonyl Migration in ortho‐Carbonyl Anilines: Charge Transfer Enabled ortho‐Selectivity. ASIAN J ORG CHEM 2022. [DOI: 10.1002/ajoc.202200164] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Alankrita Garia
- Indian Institute of Technology Delhi Chemistry Hauz Khas Delhi INDIA
| | - Sharvan Kumar
- Indian Institute of Technology Delhi Chemistry Hauz Khas Delhi INDIA
| | - Nidhi Jain
- Indian Institute of Technology Chemistry Hauz Khas 110016 Delhi INDIA
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2
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Sun XT, Hu ZG, Huang Z, Zhou LL, Weng JQ. A Novel PIFA/KOH Promoted Approach to Synthesize C2-arylacylated Benzothiazoles as Potential Drug Scaffolds. Molecules 2022; 27:726. [PMID: 35163992 PMCID: PMC8838045 DOI: 10.3390/molecules27030726] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2021] [Revised: 01/20/2022] [Accepted: 01/21/2022] [Indexed: 02/01/2023] Open
Abstract
To discover an efficient and convenient method to synthesize C2-arylacylated benzothiazoles as potential drug scaffolds, a novel [bis(trifluoroacetoxy)iodo]benzene(PIFA)/KOH synergistically promoted direct ring-opening C2-arylacylation reaction of 2H-benzothiazoles with aryl methyl ketones has been developed. Various substrates were tolerated under optimized conditions affording the C2-arylacylation products in 70-95% yields for 38 examples. A plausible mechanism was also proposed based on a series of controlled experiments.
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Affiliation(s)
| | | | | | | | - Jian-Quan Weng
- College of Chemical Engineering, Zhejiang University of Technology, Hangzhou 310014, China; (X.-T.S.); (Z.-G.H.); (Z.H.); (L.-L.Z.)
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Yarlagadda B, Devunuri N, Mandava VBR. Facile Synthesis ofN-(Benzyl-1H-1,2,3-Triazol-5-yl) Methyl)-4-(6-Methoxybenzo [d] Thiazol-2-yl)-2-Nitrobenzamides via Click Chemistry. J Heterocycl Chem 2016. [DOI: 10.1002/jhet.2647] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Affiliation(s)
- Bharath Yarlagadda
- Chemistry Division, Department Science and Humanities; Vignan's Foundation for Science Technology and Research University (VFSTR) University; Vadlamudi Guntur Andhra Pradesh 522 213 India
| | - Nagaraj Devunuri
- Chemistry Division, Department Science and Humanities; Vignan's Foundation for Science Technology and Research University (VFSTR) University; Vadlamudi Guntur Andhra Pradesh 522 213 India
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Ahmed K, Yellamelli Valli Venkata S, Mohammed NAK, Sultana F, Methuku KR. Recent advances on structural modifications of benzothiazoles and their conjugate systems as potential chemotherapeutics. Expert Opin Investig Drugs 2012; 21:619-35. [PMID: 22493977 DOI: 10.1517/13543784.2012.676043] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
INTRODUCTION Benzothiazole scaffold comprises a bicyclic ring system and is known to exhibit a wide range of biological properties including antimicrobial and anticancer activities. Benzothiazole derivatives have long been therapeutically used for the treatment of various diseases. However, in recent years, 2-arylbenzothiazoles have emerged as an important pharmacophore in the development of antitumor agents. The promising biological profile and synthetic accessibility have been attractive in the design and development of new benzothiazoles and their conjugate systems as potential chemotherapeutics. AREAS COVERED This review mainly focuses on the structural modifications of benzothiazole scaffold, development of various series of benzothiazoles and their conjugates as new antitumor agents. Furthermore, heterocyclic derivatives bearing benzothiazole moiety and their in vitro as well as in vivo screening, structure-activity relationships (SAR), mechanism, pharmacokinetics, clinical use and their future therapeutic applications are discussed here. EXPERT OPINION A large number of benzothiazole derivatives discussed here possess potent anticancer activity and can be further developed as drug candidates. Benzothiazole conjugates could also display synergistic effect and still there is a need to use the drug combinations permitting lower dose and development of new generation of drugs. Despite encouraging results that have been observed for their response to tumor in clinical studies, full characterization of their toxicity is further required for their clinical usage as safe drugs for the treatment of cancer. We believe that this review gives a better understanding and scope for future drug design and development of benzothiazole-based compounds to implicate their use in cancer chemotherapy.
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Affiliation(s)
- Kamal Ahmed
- Indian Institute of Chemical Technology, Division of Organic Chemistry, Tarnaka, Hyderabad, India.
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5
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Noolvi MN, Patel HM, Kaur M. Benzothiazoles: search for anticancer agents. Eur J Med Chem 2012; 54:447-62. [PMID: 22703845 DOI: 10.1016/j.ejmech.2012.05.028] [Citation(s) in RCA: 93] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2012] [Revised: 05/16/2012] [Accepted: 05/22/2012] [Indexed: 11/25/2022]
Abstract
Novel derivatives of 2-amino benzothiazoles 4(a-j) have been synthesized and tested for their antitumor activity using National Cancer Institute (NCI) disease oriented antitumor screen protocol against nine panel of cancer cell lines. Among the synthesized compounds, two compounds were granted NSC code and screened at National Cancer Institute (NCI)-USA for anticancer activity at a single high dose (10(-5) M) and five dose in full NCI 60 cell panel. Among the selected compounds, 7-chloro-N-(2,6-dichlorophenyl)benzo[d]thiazol-2-amine (4i) with GI(50) values of 7.18 × 10(-8) M against Non-Small Cell HOP-92 Lung Cancer cell line proved to be the most active members in this study. Virtual screening was carried out through docking the designed compounds into the ATP binding site of epidermal growth factor receptor (EGFR) to predict if these compounds have analogous binding mode to the EGFR inhibitors.
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Affiliation(s)
- Malleshappa N Noolvi
- Department of Pharmaceutical Chemistry, Shree Dhanvantary Pharmacy College, Kim (Surat)-3941110, Gujrat, India.
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Mosslemin MH, Fazlinia A. An Efficient Procedure for the Synthesis of Benzoxazole and Benzothiazole Derivatives Using a H2O2/SiO2-FeCl3 System. PHOSPHORUS SULFUR 2010. [DOI: 10.1080/10426501003598630] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
| | - Abbas Fazlinia
- a Department of Chemistry , Islamic Azad University–Yazd Branch , Yazd, Iran
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7
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Bhuva HA, Kini SG. Synthesis, anticancer activity and docking of some substituted benzothiazoles as tyrosine kinase inhibitors. J Mol Graph Model 2010; 29:32-7. [DOI: 10.1016/j.jmgm.2010.04.003] [Citation(s) in RCA: 50] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2009] [Revised: 02/03/2010] [Accepted: 04/17/2010] [Indexed: 11/16/2022]
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Fan J, Wan C, Sun G, Wang Z. Cascade Synthesis of 3-Quinolinecarboxylic Ester via Benzylation/ Propargylation−Cyclization. J Org Chem 2008; 73:8608-11. [DOI: 10.1021/jo8017654] [Citation(s) in RCA: 55] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Jinmin Fan
- Hefei National Laboratory for Physical Science at Microscale, Joint laboratory of Green Synthetic Chemistry and Department of Chemistry, University of Science and Technology of China, Hefei, Anhui 230026, P. R. China
| | - Changfeng Wan
- Hefei National Laboratory for Physical Science at Microscale, Joint laboratory of Green Synthetic Chemistry and Department of Chemistry, University of Science and Technology of China, Hefei, Anhui 230026, P. R. China
| | - Gaojun Sun
- Hefei National Laboratory for Physical Science at Microscale, Joint laboratory of Green Synthetic Chemistry and Department of Chemistry, University of Science and Technology of China, Hefei, Anhui 230026, P. R. China
| | - Zhiyong Wang
- Hefei National Laboratory for Physical Science at Microscale, Joint laboratory of Green Synthetic Chemistry and Department of Chemistry, University of Science and Technology of China, Hefei, Anhui 230026, P. R. China
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Shestakov AS, Gusakova NV, Shikhaliev KS, Timoshkina AG. Cyanamides in the synthesis of 1,3-thiazole and 1,3-thiazine derivatives. RUSSIAN JOURNAL OF ORGANIC CHEMISTRY 2007. [DOI: 10.1134/s1070428007120159] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Koval’ IV. Heterocyclization reactions involving thiols. RUSSIAN JOURNAL OF ORGANIC CHEMISTRY 2006. [DOI: 10.1134/s1070428006050010] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Yokum TS, Alsina J, Barany G. Solid-phase syntheses of heterocycles containing the 2-aminothiophenol moiety. JOURNAL OF COMBINATORIAL CHEMISTRY 2000; 2:282-92. [PMID: 10827937 DOI: 10.1021/cc9900854] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Efficient and general procedures have been developed for the solid-phase preparation of substituted benzothiazoles (1), 3, 4-dihydro-1,4-benzothiazines (2), 3,4-dihydro-1,4-benzothiazine-1, 1-dioxides (3), 3,4-dihydro-3-oxo-1,4-benzothiazines (4), and 3, 4-dihydro-3-oxo-1,4-benzothiazine-1,1-dioxides (5). All five classes of compounds were prepared from a common intermediate, resin-bound 2-amino-4-carboxythiophenol, in a minimal number of steps. This intermediate was generated by (i) coupling 4-fluoro-3-nitrobenzoic acid onto Wang resin, or onto an amino acid bound to the resin, (ii) substitution of the aryl fluoride with a protected thiol, (iii) reduction of the nitro group, and (iv) removal of sulfur protection. Reaction with the appropriate substrates and reagents to effect cyclization gave the substituted core structures, which were modified further to introduce additional point(s) of diversity. Following cleavages from the solid support, the compounds were obtained in high initial purities and good isolated yields after purification.
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Affiliation(s)
- T S Yokum
- Department of Chemistry, University of Minnesota, Minneapolis, Minnesota 55455, USA
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Baba A, Kawamura N, Makino H, Ohta Y, Taketomi S, Sohda T. Studies on disease-modifying antirheumatic drugs: synthesis of novel quinoline and quinazoline derivatives and their anti-inflammatory effect. J Med Chem 1996; 39:5176-82. [PMID: 8978845 DOI: 10.1021/jm9509408] [Citation(s) in RCA: 112] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
In the course of our study aimed at developing new types of DMARDs (disease-modifying antirheumatic drugs), we found that quinoline derivative 1a had a potent anti-inflammatory effect in an adjuvant arthritis (AA) rat model, starting from the potent bone resorption inhibitors justicidins as the lead compounds. Further modification of 1a was performed, and various quinoline and quinazoline derivatives having a heteroaryl moiety on the alkyl side chain at the 2-position of the skeleton were prepared. These compounds were evaluated for anti-inflammatory effects using the AA rat model. Most of these compounds, especially those having an imidazole or a triazole moiety on the 2-alkyl chain, exhibited a potent effect. Among the compounds synthesized, ethyl 4-(3,4-dimethoxyphenyl)-6,7-dimethoxy-2-(1,2, 4-triazol-1-yl-methyl)quinoline-3-carboxylate (12d), having an ED50 value of 2.6 mg/kg/day (anti-inflammatory effect in an AA rat model, po), was selected as a candidate for further investigation. In vitro, 12d inhibited mitogen-induced proliferation at 10(-7)-10(-5) M but not prostaglandin E2 production at 10(-5) M. Moreover, 12d preferentially inhibited the IFN-gamma production by Th1-type clones over the IL-4 production by Th2-type clones. This preferential suppression of Th1 cytokine production is considered the essential immunomodulating action of 12d for the present. Synthesis and structure-activity relationships for this novel series of quinoline and quinazoline derivatives are detailed.
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Affiliation(s)
- A Baba
- Pharmaceutical Research Division, Takeda Chemical Industries, Ltd., Osaka, Japan
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Miyairi S, Shimada H, Awata N, Goto J, Nambara T. Novel immunoaffinity extraction for liquid chromatographic determination of major metabolites of 4-acetoxy-2-(4-methylphenyl)benzothiazole in plasma. J Pharm Biomed Anal 1994; 12:389-95. [PMID: 8031940 DOI: 10.1016/0731-7085(94)90016-7] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
Group extraction of the metabolites of 4-acetoxy-2-(4-methylphenyl)benzothiazole has been achieved through the use of an immunoaffinity adsorbent. The antisera elicited from an immunogen, 4-hydroxy-2-(4-formylphenyl)benzothiazole O-carboxymethyloxime-bovine serum albumin conjugate, were characterized to have a broad affinity spectrum for major metabolites oxidized at the 4-methyl group of the benzene moiety. One millilitre of the immunoaffinity adsorbent prepared by immobilization of antibodies (12.5 mg ml-1) was capable of retaining up to 4 micrograms of benzothiazoles. The adsorbates were recovered quantitatively by elution with 90% (v/v) methanol without any interfering peaks on the high-performance liquid chromatogram. The peak-height ratio of each metabolite to an internal standard was plotted against the concentration of the former substance; good linearity was observed in the range of 10-500 ng ml-1.
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Affiliation(s)
- S Miyairi
- Pharmaceutical Institute, Tohoku University, Sendai, Japan
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Miyairi S, Shimada H, Morita H, Awata N, Goto J, Nambara T. Enzyme immunoassay for 4-hydroxy-2-(4-methylphenyl)benzothiazole. J Pharm Biomed Anal 1993; 11:469-76. [PMID: 8399517 DOI: 10.1016/0731-7085(93)80159-x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
A specific enzyme immunoassay (EIA) has been developed for 4-hydroxy-2-(4-methylphenyl)benzothiazole (KB-2714) (1), an active metabolite of 4-acetoxy-2-(4-methylphenyl)benzothiazole (KB-2683) (2) which is a promising anti-rheumatic agent. The EIA was based upon antiserum elicited against 5-(2-carboxyphenylazo)-4-hydroxy-2-(4-methylphenyl)benzothiazole (3)-bovine serum albumin conjugate and beta-galactosidase-labelled 5-amino-4-hydroxy-2-(4-methylphenyl)benzothiazole (5). The sensitivity of the EIA was significantly improved by the utilization of a bridge heterologous combination system. An appropriate dose-response curve of EIA for 4-hydroxy-2-(4-methylphenyl)benzothiazole was obtained in the range of 10 pg tube-1-20 ng tube-1. The specificity of EIA proved to be satisfactory in terms of cross-reactivities to 14 benzothiazole-related compounds including glucuronic acid and sulphuric acid conjugates. The proposed method was evaluated to be useful for the determination of 1 in urine and plasma with acceptable recovery and inter- and intra-assay precision.
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Affiliation(s)
- S Miyairi
- Pharmaceutical Institute, Tohoku University, Sendai, Japan
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