1
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Anjali, Kamboj P, Alam O, Patel H, Ahmad I, Ahmad SS, Amir M. Design, synthesis, biological evaluation, and in silico studies of quinoxaline derivatives as potent p38α MAPK inhibitors. Arch Pharm (Weinheim) 2024; 357:e2300301. [PMID: 37847883 DOI: 10.1002/ardp.202300301] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2023] [Revised: 09/19/2023] [Accepted: 09/28/2023] [Indexed: 10/19/2023]
Abstract
A new series of quinoxaline derivatives possessing the hydrazone moiety were designed, synthesized, and screened for in-vitro anti-inflammatory activity by the bovine serum albumin (BSA) denaturation technique, and for antioxidant activity, by the (2,2'-diphenyl-1-picrylhydrazyl (DPPH) radical scavenging assay. The synthesized compounds were also tested for p38α mitogen-activated protein (MAP) kinase inhibition. The in-vivo anti-inflammatory activity was assessed by the carrageenan-induced rat paw edema inhibition method. All the compounds (4a-n) exhibited moderate to high in-vitro anti-inflammatory activity. Compound 4a displayed the highest inhibitory activity in the BSA assay (83.42%) in comparison to the standard drug diclofenac sodium (82.90%), while 4d exhibited comparable activity (81.87%). The DPPH assay revealed that compounds 4a and 4d have free radical scavenging potential (74.70% and 74.34%, respectively) comparable to the standard butylated hydroxyanisole (74.09%). Furthermore, the p38α MAP kinase inhibition assay demonstrated that compound 4a is highly selective against p38α MAP kinase (IC50 = 0.042) in comparison to the standard SB203580 (IC50 = 0.044). The five most active compounds (4a-4d and 4f) with good in-vitro profiles were selected for in-vivo anti-inflammatory studies. Compounds 4a and 4d were found to display the highest activity (83.61% and 82.92% inhibition, respectively) in comparison to the standard drug diclofenac sodium (82.65% inhibition). These compounds (4a and 4d) also exhibited better ulcerogenic and lipid peroxidation profiles than diclofenac sodium. The molecular docking and molecular dynamics simulation studies were also performed and found to be in agreement with the p38α MAP kinase inhibitory activity.
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Affiliation(s)
- Anjali
- Department of Pharmaceutical Chemistry, School of Pharmaceutical Education and Research, Jamia Hamdard, New Delhi, India
| | - Payal Kamboj
- Department of Pharmaceutical Chemistry, School of Pharmaceutical Education and Research, Jamia Hamdard, New Delhi, India
| | - Ozair Alam
- Department of Pharmaceutical Chemistry, School of Pharmaceutical Education and Research, Jamia Hamdard, New Delhi, India
| | - Harun Patel
- Department of Pharmaceutical Chemistry, Division of Computer Aided Drug Design, R. C. Patel Institute of Pharmaceutical Education and Research, Shirpur, Maharashtra, India
| | - Iqrar Ahmad
- Department of Pharmaceutical Chemistry, Prof. Ravindra Nikam College of Pharmacy, Gondur, Dhule, Maharashtra, India
| | - Syed Sufian Ahmad
- Department of Pharmacology, School of Pharmaceutical Education and Research, Jamia Hamdard, New Delhi, India
| | - Mohd Amir
- Department of Pharmaceutical Chemistry, School of Pharmaceutical Education and Research, Jamia Hamdard, New Delhi, India
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2
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Karimi B, Mobaraki A, Mirzaei HM, Vali H. Control of selectivity in the preparation of 2-substituted benzoazoles by adjusting the surface hydrophobicity in two solid-based sulfonic acid catalysts. Org Biomol Chem 2023; 21:1692-1703. [PMID: 36734617 DOI: 10.1039/d2ob02274e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
A series of metal-free tandem reactions for the synthesis of pharmaceutically important 2-substituted benzoazoles from isothiocyanates and 2-aminothiophenol under catalyst-free conditions in the presence of Et-PMO-Me-PrSO3H (1a) and SBA-15-PrSO3H (1b) as solid acids were carried out in a highly selective way under solvent free conditions. A significant selectivity changeover toward either 2-mercaptobenzoxazole or 2-aminobenzoazole derivatives could be achieved by changing the employed catalyst from the relatively hydrophobic material 1a to the more hydrophilic catalyst 1b. This simple experimental procedure with a novel selective approach toward benzoazoles accompanied by green and reusable catalysts could be considered as an alternative to the existing methods for the synthesis of 2-substituted benzoazole derivatives.
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Affiliation(s)
- Babak Karimi
- Department of Chemistry, Institute for Advanced Studies in Basic Sciences (IASBS), Prof. Sobouti Boulevard, Zanjan 45137-6731, Iran. .,Research Center for Basic Sciences & Modern Technologies (RBST), Institute for Advanced Studies in Basic Sciences (IASBS), Prof. Sobouti Boulevard, Zanjan 45137-66731, Iran
| | - Akbar Mobaraki
- Department of Chemistry, Institute for Advanced Studies in Basic Sciences (IASBS), Prof. Sobouti Boulevard, Zanjan 45137-6731, Iran. .,Department of Chemistry, Kharazmi University, South Mofatteh Ave., Tehran 15719-14911, Iran
| | - Hamid M Mirzaei
- Department of Chemistry, Institute for Advanced Studies in Basic Sciences (IASBS), Prof. Sobouti Boulevard, Zanjan 45137-6731, Iran.
| | - Hojatollah Vali
- Anatomy and Cell Biology and Facility for Electron Microscopy Research, McGill University, 3450 University St, Montreal, Quebec, H3A 2A7, Canada
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3
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Ali EMH, Abdel-Maksoud MS, Hassan RM, Mersal KI, Ammar UM, Se-In C, He-Soo H, Kim HK, Lee A, Lee KT, Oh CH. Design, synthesis and anti-inflammatory activity of imidazol-5-yl pyridine derivatives as p38α/MAPK14 inhibitor. Bioorg Med Chem 2021; 31:115969. [PMID: 33422910 DOI: 10.1016/j.bmc.2020.115969] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2020] [Revised: 12/20/2020] [Accepted: 12/21/2020] [Indexed: 01/12/2023]
Abstract
P38α/MAPK14 is intracellular signalling regulator involved in biosynthesis of inflammatory mediator cytokines (TNF-α, IL-1, IL-6, and IL-1b), which induce the production of inflammatory proteins (iNOS, NF-kB, and COX-2). In this study, drug repurposing strategies were followed to repositioning of a series of B-RAF V600E imidazol-5-yl pyridine inhibitors to inhibit P38α kinase. A group 25 reported P38α kinase inhibitors were used to build a pharmacophore model for mapping the target compounds and proving their affinity for binding in P38α active site. Target compounds were evaluated for their potency against P38α kinase, compounds 11a and 11d were the most potent inhibitors (IC50 = 47 nM and 45 nM, respectively). In addition, compound 11d effectively inhibited the production of proinflammatory cytokinesTNF-α, 1L-6, and 1L-1β in LPS-induced RAW 264.7 macrophages with IC50 values of 78.03 nM, 17.6 µM and 82.15 nM, respectively. The target compounds were tested for their anti-inflammatory activity by detecting the reduction of Nitric oxide (NO) and prostaglandin (PGE2) production in LPS-stimulated RAW 264.7 macrophages. Compound 11d exhibited satisfied inhibitory activity of the production of PGE2 and NO with IC50 values of 0.29 µM and 0.61 µM, respectively. Molecular dynamics simulations of the most potent inhibitor 11d were carried out to illustrate its conformational stability in the binding site of P38α kinase.
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Affiliation(s)
- Eslam M H Ali
- Center for Biomaterials, Korea Institute of Science & Technology (KIST School), Seoul, Seongbuk-gu, 02792, Republic of Korea; University of Science & Technology (UST), Daejeon, Yuseong-gu, 34113, Republic of Korea; Pharmaceutical Chemistry Department, Faculty of Pharmacy, Modern University for Technology and Information (MTI), Cairo 12055, Egypt
| | - Mohammed S Abdel-Maksoud
- Medicinal & Pharmaceutical Chemistry Department, Pharmaceutical and Drug Industries Research Division, National Research Centre (NRC), (ID: 60014618), P.O. 12622, Dokki, Giza, Egypt
| | - Rasha Mohamed Hassan
- Medicinal & Pharmaceutical Chemistry Department, Pharmaceutical and Drug Industries Research Division, National Research Centre (NRC), (ID: 60014618), P.O. 12622, Dokki, Giza, Egypt
| | - Karim I Mersal
- Center for Biomaterials, Korea Institute of Science & Technology (KIST School), Seoul, Seongbuk-gu, 02792, Republic of Korea; University of Science & Technology (UST), Daejeon, Yuseong-gu, 34113, Republic of Korea
| | - Usama M Ammar
- Strathclyde Institute of Pharmacy and Biomedical Sciences, University of Strathclyde, 161 Cathedral Street, Glasgow G4 0NR, Scotland, United Kingdom
| | - Choi Se-In
- Department of Pharmaceutical Biochemistry, College of Pharmacy, Kyung Hee University, 1 Hoegi-dong, Dongdaemun-gu, Seoul 130-701, Republic of Korea
| | - Han He-Soo
- Department of Pharmaceutical Biochemistry, College of Pharmacy, Kyung Hee University, 1 Hoegi-dong, Dongdaemun-gu, Seoul 130-701, Republic of Korea
| | - Hee-Kwon Kim
- Department of Nuclear Medicine, Molecular Imaging & Therapeutic Medicine Research Center, Jeonbuk National University Medical School and Hospital, 20 Geonji-ro, Deokjin-gu, Jeonju 54907, Republic of Korea; Research Institute of Clinical Medicine of Jeonbuk National University-Biomedical Research Institute of Jeonbuk National University Hospital, 20 Geonji-ro, Deokjin-gu, Jeonju 54907, Republic of Korea
| | - Anna Lee
- Department of Chemistry, Hanseo University, Seosan 31962, Republic of Korea
| | - Kyung-Tae Lee
- Department of Pharmaceutical Biochemistry, College of Pharmacy, Kyung Hee University, 1 Hoegi-dong, Dongdaemun-gu, Seoul 130-701, Republic of Korea.
| | - Chang-Hyun Oh
- Center for Biomaterials, Korea Institute of Science & Technology (KIST School), Seoul, Seongbuk-gu, 02792, Republic of Korea; University of Science & Technology (UST), Daejeon, Yuseong-gu, 34113, Republic of Korea.
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4
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Mubeen M, Kini SG, Kumar A, Pai KSR. Design, Synthesis, Biological Evaluation and In Silico Studies of Few Novel 2-Substituted Benzothiazole Derivatives as Potential EGFR Inhibitors. LETT DRUG DES DISCOV 2019. [DOI: 10.2174/1570180816666181108112228] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Background:
There is a great unmet medical need for new anticancer small molecule
therapeutics. Exhaustive literature review suggests that benzothiazole derivatives have good potential
to exhibit anticancer activity. Compounds that inhibit the kinase activity of EGFR are of potential
interest as new antitumor agent.
Objective:
To design, synthesize and carry out in silico along with biological evaluation of 2-
substituted benzothiazole compounds with EGFR inhibitory activity.
Methods:
Benzothiazole derivatives designed from molecular docking method for potential EGFR
tyrosine kinase inhibition have been synthesized based on the docking results and characterized. Insilico
studies were carried out to understand the mode of EGFR enzyme inhibition by our molecules.
As a preliminary study, these compounds were first screened for antioxidant activity and then for
anticancer activity against MCF-7 cell lines and A549 cell line.
Results:
Compound B5 showed potent anticancer activity on MCF-7 cell line with IC50 value of
9.7µM and compound B8 showed significant anticancer activity on A549 cell line with IC50 value of
49.7μM in comparison with the standard drug Doxorubicin (IC50 = 1.4µM on MCF-7 and 1.0µM on
A549 cell lines). In EGFR inhibitory activity B8 showed maximum activity on A549 cell line by
inactivating 69.10% of EGFR phosphorylation and B7 showed maximum activity on MCF-7 cell line
by inactivating 41.90% of EGFR phosphorylation in comparison with the reference drug Gefitinib.
Molecular dynamics simulation studies suggest that benzothiazole derivative could also bind to
allosteric site and inhibit the EGFR enzyme activity.
Conclusion:
Reported compounds have shown potent anticancer activity through EGFR inhibition
by possibly binding at allosteric site.
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Affiliation(s)
- Muhammad Mubeen
- Department of Pharmaceutical Chemistry, Manipal College of Pharmaceutical Sciences, MAHE, Manipal, Karnataka, India
| | - Suvarna Ganesh Kini
- Department of Pharmaceutical Chemistry, Manipal College of Pharmaceutical Sciences, MAHE, Manipal, Karnataka, India
| | - Avinash Kumar
- Department of Pharmaceutical Chemistry, Manipal College of Pharmaceutical Sciences, MAHE, Manipal, Karnataka, India
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5
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Atatreh N, Youssef AM, Ghattas MA, Al Sorkhy M, Alrawashdeh S, Al-Harbi KB, El-Ashmawy IM, Almundarij TI, Abdelghani AA, Abd-El-Aziz AS. Anti-inflammatory drug approach: Synthesis and biological evaluation of novel pyrazolo[3,4-d]pyrimidine compounds. Bioorg Chem 2019; 86:393-400. [DOI: 10.1016/j.bioorg.2019.02.014] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2018] [Revised: 02/03/2019] [Accepted: 02/04/2019] [Indexed: 11/29/2022]
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6
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Hudwekar AD, Verma PK, Kour J, Balgotra S, Sawant SD. Transition Metal-Free Oxidative Coupling of Primary Amines in Polyethylene Glycol at Room Temperature: Synthesis of Imines, Azobenzenes, Benzothiazoles, and Disulfides. European J Org Chem 2019. [DOI: 10.1002/ejoc.201801610] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Affiliation(s)
- Abhinandan D. Hudwekar
- Medicinal Chemistry Division; CSIR-Indian Institute of Integrative Medicine; Canal Road -180001 Jammu India
- Anusandhan Bhawan; Academy of Scientific and Innovative Research (AcSIR); 2 Rafi Marg 110001 New Delhi India
| | - Praveen K. Verma
- Medicinal Chemistry Division; CSIR-Indian Institute of Integrative Medicine; Canal Road -180001 Jammu India
| | - Jaspreet Kour
- Medicinal Chemistry Division; CSIR-Indian Institute of Integrative Medicine; Canal Road -180001 Jammu India
- Anusandhan Bhawan; Academy of Scientific and Innovative Research (AcSIR); 2 Rafi Marg 110001 New Delhi India
| | - Shilpi Balgotra
- Medicinal Chemistry Division; CSIR-Indian Institute of Integrative Medicine; Canal Road -180001 Jammu India
- Anusandhan Bhawan; Academy of Scientific and Innovative Research (AcSIR); 2 Rafi Marg 110001 New Delhi India
| | - Sanghapal D. Sawant
- Medicinal Chemistry Division; CSIR-Indian Institute of Integrative Medicine; Canal Road -180001 Jammu India
- Anusandhan Bhawan; Academy of Scientific and Innovative Research (AcSIR); 2 Rafi Marg 110001 New Delhi India
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7
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Tariq S, Kamboj P, Alam O, Amir M. 1,2,4-Triazole-based benzothiazole/benzoxazole derivatives: Design, synthesis, p38α MAP kinase inhibition, anti-inflammatory activity and molecular docking studies. Bioorg Chem 2018; 81:630-641. [DOI: 10.1016/j.bioorg.2018.09.015] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2018] [Revised: 08/31/2018] [Accepted: 09/07/2018] [Indexed: 01/14/2023]
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8
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Tariq S, Alam O, Amir M. Synthesis, p38α MAP kinase inhibition, anti-inflammatory activity, and molecular docking studies of 1,2,4-triazole-based benzothiazole-2-amines. Arch Pharm (Weinheim) 2018; 351:e1700304. [PMID: 29611883 DOI: 10.1002/ardp.201700304] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2017] [Revised: 01/31/2018] [Accepted: 02/06/2018] [Indexed: 12/30/2022]
Abstract
Recent studies have demonstrated that inhibition of p38α MAP kinase could effectively inhibit pro-inflammatory cytokines including TNF-α and interleukins. Thus, inhibition of this enzyme can prove greatly beneficial in the therapy of chronic inflammatory diseases. A new series of N-[3-(substituted-4H-1,2,4-triazol-4-yl)]-benzo[d]thiazol-2-amines (4a-n) were synthesized and subjected to in vitro evaluation for anti-inflammatory activity (BSA anti-denaturation assay) and p38α MAPK inhibition. Among the compounds selected for in vivo screening of anti-inflammatory activity (4b, 4c, 4f, 4g, 4j, 4m, and 4n), compound 4f was found to be the most active with an in vivo anti-inflammatory efficacy of 85.31% when compared to diclofenac sodium (83.68%). It was also found to have a low ulcerogenic risk and a protective effect on lipid peroxidation. The p38α MAP kinase inhibition of this compound (IC50 = 0.036 ± 0.12 μM) was also found to be superior to the standard SB203580 (IC50 = 0.043 ± 0.27 μM). Furthermore, the in silico binding mode of the compound on docking against p38α MAP kinase exemplified stronger interactions than those of SB203580.
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Affiliation(s)
- Sana Tariq
- Department of Pharmaceutical Chemistry, School of Pharmaceutical Education and Research, Hamdard University, New Delhi, India
| | - Ozair Alam
- Department of Pharmaceutical Chemistry, School of Pharmaceutical Education and Research, Hamdard University, New Delhi, India
| | - Mohammad Amir
- Department of Pharmaceutical Chemistry, School of Pharmaceutical Education and Research, Hamdard University, New Delhi, India
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9
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Synthesis, anti-inflammatory, p38α MAP kinase inhibitory activities and molecular docking studies of quinoxaline derivatives containing triazole moiety. Bioorg Chem 2018; 76:343-358. [DOI: 10.1016/j.bioorg.2017.12.003] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2017] [Revised: 11/17/2017] [Accepted: 12/01/2017] [Indexed: 01/25/2023]
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10
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He Y, Li J, Luo S, Huang J, Zhu Q. A metal-free synthesis of 2-aminobenzothiazoles through aminyl radical addition to aryl isothiocyanates. Chem Commun (Camb) 2018; 52:8444-7. [PMID: 27306915 DOI: 10.1039/c6cc04394a] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A convenient synthesis of 2-aminobenzothiazoles, starting from aryl isothiocyanates and formamides under metal-free conditions, is described. Various secondary and tertiary amine- and even α-amino acid-derived formamides can be used as amino sources in this process. Mechanistic studies suggest that the reaction is initiated by decarbonylative aminyl radical formation in the presence of n-Bu4NI and TBHP, followed by aminyl radical addition to isothiocyanates and cyclization via sulfur centred radical intermediates.
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Affiliation(s)
- Yimiao He
- Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, 190 Kaiyuan Avenue, Guangzhou 510530, China.
| | - Jing Li
- Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, 190 Kaiyuan Avenue, Guangzhou 510530, China.
| | - Shuang Luo
- Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, 190 Kaiyuan Avenue, Guangzhou 510530, China.
| | - Jinbo Huang
- Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, 190 Kaiyuan Avenue, Guangzhou 510530, China.
| | - Qiang Zhu
- Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, 190 Kaiyuan Avenue, Guangzhou 510530, China.
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11
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Dadmal TL, Katre SD, Mandewale MC, Kumbhare RM. Contemporary progress in the synthesis and reactions of 2-aminobenzothiazole: a review. NEW J CHEM 2018. [DOI: 10.1039/c7nj03776g] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Various protocols for the synthesis and reactions of 2-aminobenzothiazole.
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Affiliation(s)
- Tulshiram L. Dadmal
- Department of Chemistry
- Government of Maharashtra's
- Ismail Yusuf College
- Mumbai 400060
- India
| | - Sangita D. Katre
- Department of Chemistry
- Chhotabhai Javerbhai Patel College
- Gondia 441911
- India
| | - Mustapha C. Mandewale
- Department of Chemistry
- Government of Maharashtra's
- Ismail Yusuf College
- Mumbai 400060
- India
| | - Ravindra M. Kumbhare
- Fluoroorganics Division
- Indian Institute of Chemical Technology
- Hyderabad 500607
- India
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12
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Eshkil F, Eshghi H, Saljooghi AS, Bakavoli M, Rahimizadeh M. Benzothiazole thiourea derivatives as anticancer agents: Design, synthesis, and biological screening. RUSSIAN JOURNAL OF BIOORGANIC CHEMISTRY 2017. [DOI: 10.1134/s1068162017050065] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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13
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Paul P, Bhanja P, Salam N, Mandi U, Bhaumik A, Alam SM, Islam SM. Silver nanoparticles supported over mesoporous alumina as an efficient nanocatalyst for N-alkylation of hetero (aromatic) amines and aromatic amines using alcohols as alkylating agent. J Colloid Interface Sci 2017; 493:206-217. [DOI: 10.1016/j.jcis.2016.12.072] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2016] [Revised: 12/28/2016] [Accepted: 12/30/2016] [Indexed: 11/29/2022]
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14
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S. Mohamed K, M. Refat H, A. H. Mohamed N. Synthesis, Characterization and Cytotoxicity Evaluation of Some Novel Pyrazole, Pyrimidine and Isoxazoloe Drivatives Containing Benzothiazole Moiety. HETEROCYCLES 2016. [DOI: 10.3987/com-16-13483] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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15
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Dhopte KB, Zambare RS, Patwardhan AV, Nemade PR. Role of graphene oxide as a heterogeneous acid catalyst and benign oxidant for synthesis of benzimidazoles and benzothiazoles. RSC Adv 2016. [DOI: 10.1039/c5ra19066e] [Citation(s) in RCA: 52] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Graphene oxide plays a dual role as active metal-free acid catalyst and as non-toxic oxidant for benzothiazole and benzimidazole synthesis. Isolated partially reduced graphene oxide was re-oxidized to regenerate the catalyst and restore its activity.
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Affiliation(s)
- Kiran B. Dhopte
- Department of Chemical Engineering
- Institute of Chemical Technology
- Mumbai
- India
| | - Rahul S. Zambare
- Department of Chemical Engineering
- Institute of Chemical Technology
- Mumbai
- India
| | - Anand V. Patwardhan
- Department of Chemical Engineering
- Institute of Chemical Technology
- Mumbai
- India
| | - Parag R. Nemade
- Department of Chemical Engineering
- Institute of Chemical Technology
- Mumbai
- India
- Department of Oils
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16
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KATARI NARESHKUMAR, VENKATANARAYANA M, SRINIVAS KUMMARI. Dithiocarbamate promoted practical synthesis of N-Aryl-2-aminobenzazoles: Synthesis of novel Aurora-A kinase inhibitor. J CHEM SCI 2015. [DOI: 10.1007/s12039-015-0803-4] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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17
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Astolfi A, Iraci N, Manfroni G, Barreca ML, Cecchetti V. A Comprehensive Structural Overview of p38α MAPK in Complex with Type I Inhibitors. ChemMedChem 2015; 10:957-69. [PMID: 26012502 DOI: 10.1002/cmdc.201500030] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2015] [Revised: 03/05/2015] [Indexed: 12/12/2022]
Abstract
p38α mitogen-activated protein kinase (MAPK) is a well-recognized therapeutic target for the treatment of autoimmune and inflammatory diseases. Over the past two decades, tremendous efforts have been focused on the discovery and development of small-molecule p38α MAPK inhibitors, although currently no drugs targeting this protein are clinically available. Therefore, the identification of novel chemotypes that are able to inhibit p38α MAPK function is still of great therapeutic significance. With the objective to support drug discovery programs aimed at identifying new immunomodulators acting on p38α MAPK, herein we present a complete overview of the available crystal structures of this protein in complex with ATP-site type I inhibitors. The 85 available complexes are classified by chemotype and experimental binding mode, and the ligand-protein interactions are discussed using the most representative inhibitors. The type and frequency of key inhibitor features are analyzed to give a final summary of the chemical requirements of promising p38α MAPK inhibitors. The proposed pharmacophore can be exploited to enhance the opportunities to identify novel type I inhibitors of p38α MAPK.
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Affiliation(s)
- Andrea Astolfi
- Department of Pharmaceutical Sciences, University of Perugia, Via A. Fabretti 48, 06123 Perugia (Italy)
| | - Nunzio Iraci
- Department of Pharmaceutical Sciences, University of Perugia, Via A. Fabretti 48, 06123 Perugia (Italy)
| | - Giuseppe Manfroni
- Department of Pharmaceutical Sciences, University of Perugia, Via A. Fabretti 48, 06123 Perugia (Italy)
| | - Maria Letizia Barreca
- Department of Pharmaceutical Sciences, University of Perugia, Via A. Fabretti 48, 06123 Perugia (Italy).
| | - Violetta Cecchetti
- Department of Pharmaceutical Sciences, University of Perugia, Via A. Fabretti 48, 06123 Perugia (Italy)
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18
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Morofuji T, Shimizu A, Yoshida J. Electrochemical Intramolecular CH Amination: Synthesis of Benzoxazoles and Benzothiazoles. Chemistry 2015; 21:3211-4. [DOI: 10.1002/chem.201406398] [Citation(s) in RCA: 67] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2014] [Indexed: 01/23/2023]
Affiliation(s)
- Tatsuya Morofuji
- Department of Synthetic Chemistry and Biological Chemistry, Graduate School of Engineering, Kyoto University, Nishikyo‐ku, Kyoto 615‐8510 (Japan)
| | - Akihiro Shimizu
- Department of Synthetic Chemistry and Biological Chemistry, Graduate School of Engineering, Kyoto University, Nishikyo‐ku, Kyoto 615‐8510 (Japan)
| | - Jun‐ichi Yoshida
- Department of Synthetic Chemistry and Biological Chemistry, Graduate School of Engineering, Kyoto University, Nishikyo‐ku, Kyoto 615‐8510 (Japan)
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19
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Palladium-catalyzed N-arylation of 2-aminobenzothiazole-4-carboxylates/carboxamides: facile synthesis of PARP14 inhibitors. Tetrahedron 2014. [DOI: 10.1016/j.tet.2014.06.064] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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20
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Jetti V, Chidurala P, Pagadala R, Meshram JS, Ramakrishna C. Ultrasound-Assisted One-pot Synthesis of Bis-azetidinones in the Presence of Zeolite. J Heterocycl Chem 2014. [DOI: 10.1002/jhet.1922] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Venkateshwarlu Jetti
- Department of Chemistry; Rashtrasant Tukadoji Maharaj Nagpur University; Nagpur 440033 Maharashtra India
| | - Praveen Chidurala
- Department of Chemistry; Rashtrasant Tukadoji Maharaj Nagpur University; Nagpur 440033 Maharashtra India
| | - Ramakanth Pagadala
- Department of Chemistry; Rashtrasant Tukadoji Maharaj Nagpur University; Nagpur 440033 Maharashtra India
| | - Jyotsna S. Meshram
- Department of Chemistry; Rashtrasant Tukadoji Maharaj Nagpur University; Nagpur 440033 Maharashtra India
| | - Chowdam Ramakrishna
- Synthetic and Analytical Laboratory; Defence R&D Establishment; Nagpur 440001 Maharashtra India
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21
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Naresh G, Kant R, Narender T. Molecular Iodine Promoted Divergent Synthesis of Benzimidazoles, Benzothiazoles, and 2-Benzyl-3-phenyl-3,4-dihydro-2H-benzo[e][1,2,4]thiadiazines. J Org Chem 2014; 79:3821-9. [DOI: 10.1021/jo5000797] [Citation(s) in RCA: 57] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Gunaganti Naresh
- Medicinal
and Process Chemistry Division, CSIR-Central Drug Research Institute, Lucknow, India 226001
| | - Ruchir Kant
- Molecular
and Structural Biology Division, CSIR-Central Drug Research Institute, Lucknow, India 226001
| | - Tadigoppula Narender
- Medicinal
and Process Chemistry Division, CSIR-Central Drug Research Institute, Lucknow, India 226001
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22
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Ramachandran R, Prakash G, Selvamurugan S, Viswanathamurthi P, Malecki JG, Ramkumar V. Efficient and versatile catalysis of N-alkylation of heterocyclic amines with alcohols and one-pot synthesis of 2-aryl substituted benzazoles with newly designed ruthenium(ii) complexes of PNS thiosemicarbazones. Dalton Trans 2014; 43:7889-902. [DOI: 10.1039/c4dt00006d] [Citation(s) in RCA: 84] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
Efficient catalytic N-alkylation of amines using Ru(ii) catalysts with good yields and high selectivity.
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23
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Zhao J, Huang H, Wu W, Chen H, Jiang H. Metal-free synthesis of 2-aminobenzothiazoles via aerobic oxidative cyclization/dehydrogenation of cyclohexanones and thioureas. Org Lett 2013; 15:2604-7. [PMID: 23662734 DOI: 10.1021/ol400773k] [Citation(s) in RCA: 91] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
A metal-free process for the synthesis of 2-aminobenzothiazoles from cyclohexanones and thioureas has been developed using catalytic iodine and molecular oxygen as the oxidant under mild conditions. Various 2-aminobenzothiazoles, 2-aminonaphtho[2,1-d]thiazoles, and 2-aminonaphtho[1,2-d]thiazoles were prepared via this method in satisfactory yields.
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Affiliation(s)
- Jinwu Zhao
- School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510640, PR China
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24
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Echevarria L, Moreno I, Camacho J, Salazar MC, Hernández A. A fluorescent benzothiazole probe with efficient two-photon absorption. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2012; 97:274-276. [PMID: 22771561 DOI: 10.1016/j.saa.2012.06.022] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/26/2012] [Revised: 05/28/2012] [Accepted: 06/10/2012] [Indexed: 06/01/2023]
Abstract
In this work, we report the two-photon absorption of 2-[4-(dimethylamino)phenyl]-1,3-benzothiazole-6-carbonitrile (DBC) in DMSO solution pumping at 779 nm with a 10 ns pulse laser-Nd:YAG system. The obtained two-photon absorption cross-section in DBC (407 ± 18 GM) is considerably high. Because DBC is a novel compound and have high values of fluorescence quantum yield, this result is expected to have an impact in biomolecules detection, diagnosis and treatment of cancer. Similar structures have previously been reported to show remarkable antitumour effects.
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Affiliation(s)
- Lorenzo Echevarria
- Departamento de Química, Universidad Simón Bolívar, Apartado 89000, Caracas 1080(a), Venezuela.
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25
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Racané L, Kraljević Pavelić S, Ratkaj I, Stepanić V, Pavelić K, Tralić-Kulenović V, Karminski-Zamola G. Synthesis and antiproliferative evaluation of some new amidino-substituted bis-benzothiazolyl-pyridines and pyrazine. Eur J Med Chem 2012; 55:108-16. [PMID: 22841279 DOI: 10.1016/j.ejmech.2012.07.005] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/29/2012] [Revised: 07/02/2012] [Accepted: 07/04/2012] [Indexed: 01/26/2023]
Abstract
Novel diamidino substituted conformationally restricted derivatives of bis-benzothiazolyl-pyridines and pyrazine were synthesized and their antiproliferative activity against several human cancer cell lines were determinated. The synthetic approach used for preparation of isomeric amidinobenzotiazolyl disubstituted pyridines 3a-3k and pyrazine 3l was achieved by condenzation reaction of commercially available pyridine and pyrazine dicarboxylic acids with amidino- 2a and 2-imidazolinyl-substituted 2-aminothiophenol 2b in polyphosphoric acid in moderate to good yield. The condenzation reaction was greatly optimized. The targeted compounds were converted in the desired water soluble dihydrochloride salts by reaction of appropriate free base with concd HCl in ethanol or acetic acid. Antiproliferative assays revealed significant differences in antiproliferative activities of diamidino- and diimidazolinyl-derivatives, the latter exerting stronger concentration-dependent antiproliferative effects on tested tumor cell lines and thus being a prominent compound class for further chemical optimization and biological studies. Biological studies on SW620 cell line and BJ fibroblasts performed for the diimidazolinyl-derivative 3b revealed oxidative stress as a possible mechanism of antiproliferative action and predicted antineoplastic properties for this class of compounds.
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Affiliation(s)
- Livio Racané
- Department of Applied Chemistry, Faculty of Textile Technology, University of Zagreb, baruna Filipovića 28a 10000 Zagreb, Croatia
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26
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Basant N, Durante C, Cocchi M, Menziani MC. Modeling the Binding Affinity of p38α MAP Kinase Inhibitors by Partial Least Squares Regression. Chem Biol Drug Des 2012; 80:455-70. [DOI: 10.1111/j.1747-0285.2012.01419.x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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27
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Sahoo SK, Banerjee A, Chakraborty S, Patel BK. Regioselective Intramolecular Arylthiolations by Ligand Free Cu and Pd Catalyzed Reaction. ACS Catal 2012. [DOI: 10.1021/cs200590p] [Citation(s) in RCA: 65] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Affiliation(s)
- Santosh K. Sahoo
- Department of Chemistry, Indian Institute of Technology, Guwahati, 781 039, Assam, India
| | - Arghya Banerjee
- Department of Chemistry, Indian Institute of Technology, Guwahati, 781 039, Assam, India
| | - Supratim Chakraborty
- Department of Chemistry, Indian Institute of Technology, Guwahati, 781 039, Assam, India
| | - Bhisma K. Patel
- Department of Chemistry, Indian Institute of Technology, Guwahati, 781 039, Assam, India
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28
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Khatun N, Jamir L, Ganesh M, Patel BK. A one-pot strategy for the synthesis of 2-aminobenzothiazole in water by copper catalysis. RSC Adv 2012. [DOI: 10.1039/c2ra21826g] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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29
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Fischer S, Koeberle SC, Laufer SA. p38α mitogen-activated protein kinase inhibitors, a patent review (2005 – 2011). Expert Opin Ther Pat 2011; 21:1843-66. [DOI: 10.1517/13543776.2011.636737] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
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30
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Kumbhare RM, Dadmal T, Kosurkar U, Sridhar V, Rao JV. Synthesis and cytotoxic evaluation of thiourea and N-bis-benzothiazole derivatives: a novel class of cytotoxic agents. Bioorg Med Chem Lett 2011; 22:453-5. [PMID: 22115593 DOI: 10.1016/j.bmcl.2011.10.106] [Citation(s) in RCA: 56] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2011] [Revised: 10/04/2011] [Accepted: 10/29/2011] [Indexed: 11/27/2022]
Abstract
Benzothiazolyl thiocarbamides has been achieved using a catalytic amount of 4-dimethylaminopyridine (DMAP) followed by its chemoselective oxidative cyclization with 1,3-di-n-butylimidazolium tribromide[bbim][Br(3)] to afford the N-bis-benzothiazole derivatives. All the synthesized compounds were evaluated for cytotoxic activity against two human monocytic cell lines (U 937, THP-1) and a mouse melanoma cell line (B16-F10). Based on their IC(50) values, the majority of the benzothiazolyl thiocarbamides and N-bis-benzothiazoles had significant antiproliferative activity on U 937 and B16-F10 cells, the compounds 3b, 3e, 3f, 3k, 6c and 6h were found to be the most active. The present findings indicate clearly that the compound 3e exhibited more antiproliferative activity on U 937 cells than the standard molecule, etoposide. Nevertheless, these compounds have shown comparatively less cytotoxicity towards THP-1 cells.
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Affiliation(s)
- Ravindra M Kumbhare
- Fluoroorganic Division, Indian Institute of Chemical Technology, Tarnaka, Hyderabad 500607, India.
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31
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Reynolds RC, Ananthan S, Faaleolea E, Hobrath JV, Kwong CD, Maddox C, Rasmussen L, Sosa MI, Thammasuvimol E, White EL, Zhang W, Secrist JA. High throughput screening of a library based on kinase inhibitor scaffolds against Mycobacterium tuberculosis H37Rv. Tuberculosis (Edinb) 2011; 92:72-83. [PMID: 21708485 DOI: 10.1016/j.tube.2011.05.005] [Citation(s) in RCA: 82] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2010] [Revised: 05/09/2011] [Accepted: 05/12/2011] [Indexed: 01/10/2023]
Abstract
Kinase targets are being pursued in a variety of diseases beyond cancer, including immune and metabolic as well as viral, parasitic, fungal and bacterial. In particular, there is a relatively recent interest in kinase and ATP-binding targets in Mycobacterium tuberculosis in order to identify inhibitors and potential drugs for essential proteins that are not targeted by current drug regimens. Herein, we report the high throughput screening results for a targeted library of approximately 26,000 compounds that was designed based on current kinase inhibitor scaffolds and known kinase binding sites. The phenotypic data presented herein may form the basis for selecting scaffolds/compounds for further enzymatic screens against specific kinase or other ATP-binding targets in Mycobacterium tuberculosis based on the apparent activity against the whole bacteria in vitro.
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Affiliation(s)
- Robert C Reynolds
- Southern Research Institute, 2000 Ninth Avenue South, Birmingham, AL 35205, USA.
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32
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Wang Z, Tang R, Xiao Q. Na2S2O4-Mediated Cyclocondensations of 2,2′-Disulfanediyldi- anilines with Aldehydes: A Facile and Inexpensive Method for the Synthesis of 2-Substituted Benzothiazoles. CHINESE J CHEM 2011. [DOI: 10.1002/cjoc.201190084] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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33
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Patel RY, Doerksen RJ. Protein kinase-inhibitor database: structural variability of and inhibitor interactions with the protein kinase P-loop. J Proteome Res 2011; 9:4433-42. [PMID: 20681595 DOI: 10.1021/pr100662s] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Structure-based drug design of protein-kinase inhibitors has been facilitated by availability of an enormous number of structures in the Protein Databank (PDB), systematic analyses of which can provide insight into the factors that govern ligand-protein kinase interactions and into the conformational variability of the protein kinases. In this study, a nonredundant database containing 755 unique, curated, and annotated PDB protein kinase-inhibitor complexes (each consisting of a single protein kinase chain, a ligand, and water molecules around the ligand) was created. With this dataset, analyses were performed of protein conformational variability and interactions of ligands with 11 P-loop residues. Analysis of ligand-protein interactions included ligand atom preference, ligand-protein hydrogen bonds, and the number and position of crystallographic water molecules around important P-loop residues. Analysis of variability in the conformation of the P-loop considered backbone and side-chain dihedral angles, and solvent accessible surface area (SASA). A distorted conformation of the P-loop was observed for some of the protein kinase structures. Lower SASA was observed for the hydrophobic residue in beta1 of several members of the AGC family of protein kinases. Our systematic studies were performed amino acid-by-amino acid, which is unusual for analyses of protein kinase-inhibitor complexes.
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Affiliation(s)
- Ronak Y Patel
- Department of Medicinal Chemistry, School of Pharmacy, University of Mississippi, University, Mississippi 38677-1848, USA
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34
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Youssef AM, Neeland EG, Villanueva EB, White MS, El-Ashmawy IM, Patrick B, Klegeris A, Abd-El-Aziz AS. Synthesis and biological evaluation of novel pyrazole compounds. Bioorg Med Chem 2010; 18:5685-96. [DOI: 10.1016/j.bmc.2010.06.018] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2010] [Revised: 06/04/2010] [Accepted: 06/05/2010] [Indexed: 11/24/2022]
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35
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Misra NC, Ila H. 4-Bis(methylthio)methylene-2-phenyloxazol-5-one: Versatile Template for Synthesis of 2-Phenyl-4,5-functionalized Oxazoles. J Org Chem 2010; 75:5195-202. [DOI: 10.1021/jo100941f] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Nimesh C. Misra
- Department of Chemistry, Indian Institute of Technology, Kanpur-208 016, India
- New Chemistry Unit, Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur, Bangalore-560 064, India
| | - H. Ila
- New Chemistry Unit, Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur, Bangalore-560 064, India
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36
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Racané L, Tralić-Kulenović V, Kraljević Pavelić S, Ratkaj I, Peixoto P, Nhili R, Depauw S, Hildebrand MP, David-Cordonnier MH, Pavelić K, Karminski-Zamola G. Novel diamidino-substituted derivatives of phenyl benzothiazolyl and dibenzothiazolyl furans and thiophenes: synthesis, antiproliferative and DNA binding properties. J Med Chem 2010; 53:2418-32. [PMID: 20170096 DOI: 10.1021/jm901441b] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
A series of new diamidino-, diisopropylamidino-, and diimidazolinyl-substituted derivatives of phenyl benzothiazolyl and dibenzothiazolyl furans and thiophenes were successfully prepared and evaluated for their antiproliferative activity on tumor cell lines in vitro, DNA binding propensity, and sequence selectivity as well as cellular distribution. A strong antiproliferative effect of the tested compounds was observed on all tested cell lines in a concentration-dependent response pattern. In general, imidazolinyl-substituted derivatives and/or the thiophene core were in correlation with increased antiproliferative activity. Two compounds (2b and 3b) were chosen for biological studies due to their differential antiproliferative properties. The DNA binding properties of this new series of compounds were assessed and evidenced their efficient minor groove binding properties with preferential interaction at AT-rich sites. Both compounds also present nuclear subcellular localization, suggesting that their cellular mode of action implies localization in the DNA compartment and direct inhibition of DNA replication and induction of apoptosis.
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Affiliation(s)
- Livio Racané
- Department of Applied Chemistry, Faculty of Textile Technology, University of Zagreb, Baruna Filipovića 28a 10000 Zagreb, Croatia
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37
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38
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Racané L, Kralj M, Suman L, Stojković R, Tralić-Kulenović V, Karminski-Zamola G. Novel amidino substituted 2-phenylbenzothiazoles: synthesis, antitumor evaluation in vitro and acute toxicity testing in vivo. Bioorg Med Chem 2009; 18:1038-44. [PMID: 20060306 DOI: 10.1016/j.bmc.2009.12.054] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2009] [Revised: 12/17/2009] [Accepted: 12/21/2009] [Indexed: 12/11/2022]
Abstract
The efficient synthesis of new bis-substituted nitro-amidino, amino-amidino (10a, 10b-13a, 13b) and previously prepared diamidino 2-phenyl-benzothiazoles (9a, 9b) is described. The compounds 11a and 11b were prepared by recently developed methodology of the key precursors in zwitterionic form 8a and 8b with 4-nitrobenzoylchloride in a very good yield (70%). All compounds except diamidino-substituted 2-phenylbenzothiazole 9a show exceptionally prominent tumor cell-growth inhibitory activity and cytotoxicity, whereby the special selectivity of amino-amidine 2-phenylbenzothiazole 12a towards MCF-7 and H 460 cells makes this compound a prospective lead compound that should be further evaluated in animal models. All in vivo tested compounds (12a, 12b, 13a and 13b) are absorbed from mice gastrointestinal system. LD(50) are between 67.33 and 696.2mg/kg body weight (OECD/EPA toxicity categories 2-3).
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Affiliation(s)
- Livio Racané
- Department of Applied Chemistry, Faculty of Textile Technology, University of Zagreb, baruna Filipovića 10000 Zagreb, Croatia
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39
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Shen G, Lv X, Bao W. Synthesis ofN-Substituted-2-Aminobenzothiazoles by Ligand-Free Copper(I)-Catalyzed Cross-Coupling Reaction of 2-Haloanilines with Isothiocyanates. European J Org Chem 2009. [DOI: 10.1002/ejoc.200900953] [Citation(s) in RCA: 72] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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40
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Abstract
The p38 kinases have long been recognized as potentially valuable targets in the development of novel anti-inflammatory therapies. An application claiming a single crystalline form of N-(5-(cyclopropylcarbamoyl)-2-methylphenyl)-5-methyl-1-(3-(trifluoromethyl)pyridin-2-yl)-1H-pyrazole-4-carboxamide and its therapeutic use for the treatment of inflammatory diseases including rheumatoid arthritis, psoriasis and atherosclerosis points to the claimed compound being a development compound. The available evidence suggests that the compound could be BMS-582949, a compound in Phase II studies for the treatment of rheumatoid arthritis, psoriasis and atherosclerosis.
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Affiliation(s)
- Peter Norman
- Norman Consulting, Burnham, Buckinghamshire, SL1 8JW, UK.
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41
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Caleta I, Kralj M, Marjanović M, Bertosa B, Tomić S, Pavlović G, Pavelić K, Karminski-Zamola G. Novel cyano- and amidinobenzothiazole derivatives: synthesis, antitumor evaluation, and X-ray and quantitative structure-activity relationship (QSAR) analysis. J Med Chem 2009; 52:1744-56. [PMID: 19265399 DOI: 10.1021/jm801566q] [Citation(s) in RCA: 114] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Synthesis of a series of novel cyano- and amidinobenzothiazole derivatives 3-31 is described. All studied amidino derivatives showed noticeable antiproliferative effect on several tumor cell lines. Cyano derivatives 11-17 showed considerably less pronounced activity because of their poor solubility in aqueous cell culture medium, which was confirmed by the principal components (PC) analysis. Compounds 21, 22, 28, and 29 were tested for their effects on the cell cycle and apoptosis, whereby 22 and 29, having methyl group at the C-6 position in pyridine ring, showed drastic cell cycle perturbations that were both concentration- and time-dependent and induced apoptosis. The QSAR modeling, based on the physicochemical descriptors and on the measured biological activities, indicated the relevance of molecular polarizability and particular distribution of pharmacophores on the molecular surface for activity. In conclusion, benzothiazoles containing either isopropylamidino or imidazolyl groups will be considered as starting compounds for further investigation on lead identification.
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Affiliation(s)
- Irena Caleta
- Department of Organic Chemistry, Faculty of Chemical Engineering and Technology, University of Zagreb, Marulićev trg 20, P.O. Box 177, HR-10000 Zagreb, Croatia
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42
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Inamoto K, Hasegawa C, Hiroya K, Doi T. Palladium-Catalyzed Synthesis of 2-Substituted Benzothiazoles via a C−H Functionalization/Intramolecular C−S Bond Formation Process. Org Lett 2008; 10:5147-50. [DOI: 10.1021/ol802033p] [Citation(s) in RCA: 248] [Impact Index Per Article: 15.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Kiyofumi Inamoto
- Graduate School of Pharmaceutical Sciences, Tohoku University, 6-3, Aoba, Aramaki, Aoba-ku, Sendai 980-8578, Japan
| | - Chisa Hasegawa
- Graduate School of Pharmaceutical Sciences, Tohoku University, 6-3, Aoba, Aramaki, Aoba-ku, Sendai 980-8578, Japan
| | - Kou Hiroya
- Graduate School of Pharmaceutical Sciences, Tohoku University, 6-3, Aoba, Aramaki, Aoba-ku, Sendai 980-8578, Japan
| | - Takayuki Doi
- Graduate School of Pharmaceutical Sciences, Tohoku University, 6-3, Aoba, Aramaki, Aoba-ku, Sendai 980-8578, Japan
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