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Tang Y, Wu N, Xu J, Zhang X, Li Y, Wang X. Metal-Free Cascade Formation of C-C and C-N Bond for the Construction of 3-Cyano-2-Pyridones with Insecticidal Properties. Molecules 2024; 29:2792. [PMID: 38930857 PMCID: PMC11206961 DOI: 10.3390/molecules29122792] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2024] [Revised: 06/07/2024] [Accepted: 06/09/2024] [Indexed: 06/28/2024] Open
Abstract
A straightforward and efficient methodology has been developed for the synthesis of 3-cyano-2-pyridones via the C-C and C-N bond formation processes. A total of 51 diverse 3-cyano-2-pyridone derivatives were obtained in moderate to excellent yields. This reaction featured advantages such as a metal-free process, wide functional group tolerance, simple operation, and mild conditions. A plausible mechanism for the reaction was proposed. 3-cyano-2-pyridones as ricinine analogues for insecticidal properties were evaluated, and the compound 3ci (LC50 = 2.206 mg/mL) showed the best insecticidal property.
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Affiliation(s)
| | | | | | - Xiaopo Zhang
- Engineering Research Center of Tropical Medicine Innovation and Transformation of Ministry of Education, International Joint Research Center of Human-Machine Intelligent Collaborative for Tumor Precision Diagnosis and Treatment of Hainan Province, Hainan Key Laboratory for Research and Development of Tropical Herbs, Haikou Key Laboratory of Li Nationality Medicine, School of Pharmacy, Academy of Medical Sciences, Hainan Medical University, Haikou 571199, China; (Y.T.); (N.W.); (J.X.)
| | - Youbin Li
- Engineering Research Center of Tropical Medicine Innovation and Transformation of Ministry of Education, International Joint Research Center of Human-Machine Intelligent Collaborative for Tumor Precision Diagnosis and Treatment of Hainan Province, Hainan Key Laboratory for Research and Development of Tropical Herbs, Haikou Key Laboratory of Li Nationality Medicine, School of Pharmacy, Academy of Medical Sciences, Hainan Medical University, Haikou 571199, China; (Y.T.); (N.W.); (J.X.)
| | - Xuesong Wang
- Engineering Research Center of Tropical Medicine Innovation and Transformation of Ministry of Education, International Joint Research Center of Human-Machine Intelligent Collaborative for Tumor Precision Diagnosis and Treatment of Hainan Province, Hainan Key Laboratory for Research and Development of Tropical Herbs, Haikou Key Laboratory of Li Nationality Medicine, School of Pharmacy, Academy of Medical Sciences, Hainan Medical University, Haikou 571199, China; (Y.T.); (N.W.); (J.X.)
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2
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Lystsova EA, Novikov AS, Dmitriev MV, Maslivets AN, Khramtsova EE. Approach to Pyrido[2,1- b][1,3]benzothiazol-1-ones via In Situ Generation of Acyl(1,3-benzothiazol-2-yl)ketenes by Thermolysis of Pyrrolo[2,1- c][1,4]benzothiazine-1,2,4-triones. Molecules 2023; 28:5495. [PMID: 37513367 PMCID: PMC10385387 DOI: 10.3390/molecules28145495] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2023] [Revised: 07/13/2023] [Accepted: 07/17/2023] [Indexed: 07/30/2023] Open
Abstract
Acyl(imidoyl)ketenes are highly reactive heterocumulenes that enable diversity-oriented synthesis of various drug-like heterocycles. Such ketenes, bearing heterocyclic substituents, afford angularly fused pyridin-2(1H)-ones in their [4+2]-cyclodimerization reactions. We have utilized this property for the development of a new synthetic approach to pharmaceutically interesting pyrido[2,1-b][1,3]benzothiazol-1-ones via the [4+2]-cyclodimerization of acyl(1,3-benzothiazol-2-yl)ketenes generated in situ. The thermal behaviors of 3-aroylpyrrolo[2,1-c][1,4]benzothiazine-1,2,4-triones and 3-benzoylpyrrolo[2,1-b][1,3]benzothiazole-1,2-dione (two new types of [e]-fused 1H-pyrrole-2,3-diones reported by us recently) have been studied by thermal analysis and HPLC to elucidate their capability to be a source of acyl(1,3-benzothiazol-2-yl)ketenes. As a result, we have found that only 3-aroylpyrrolo[2,1-c][1,4]benzothiazine-1,2,4-triones are suitable for this. The experimental results are supplemented with computational studies that demonstrate that thermolysis of 3-aroylpyrrolo[2,1-c][1,4]benzothiazine-1,2,4-triones proceeds through an unprecedented cascade of two thermal decarbonylations. Based on these studies, we discovered a novel mode of thermal transformation of [e]-fused 1H-pyrrole-2,3-diones and developed a new pot, atom, and step economic synthetic approach to pyrido[2,1-b][1,3]benzothiazol-1-ones. The synthesized drug-like pyrido[2,1-b][1,3]benzothiazol-1-ones are of interest to pharmaceutics, since their close analogs show significant antiviral activity.
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Affiliation(s)
- Ekaterina A Lystsova
- Department of Organic Chemistry, Perm State University, ul. Bukireva, 15, 614990 Perm, Russia
| | - Alexander S Novikov
- Institute of Chemistry, Saint Petersburg State University, Universitetskaya nab. 7/9, 199034 St. Petersburg, Russia
- Research Institute of Chemistry, Рeoples' Friendship University of Russia (RUDN University), Miklukho-Maklaya Street, 6, 117198 Moscow, Russia
| | - Maksim V Dmitriev
- Department of Organic Chemistry, Perm State University, ul. Bukireva, 15, 614990 Perm, Russia
| | - Andrey N Maslivets
- Department of Organic Chemistry, Perm State University, ul. Bukireva, 15, 614990 Perm, Russia
| | - Ekaterina E Khramtsova
- Department of Organic Chemistry, Perm State University, ul. Bukireva, 15, 614990 Perm, Russia
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3
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Qadir T, Amin A, Salhotra A, Sharma PK, Jeelani I, Abe H. Recent advances in the synthesis of benzothiazole and its derivatives. CURR ORG CHEM 2021. [DOI: 10.2174/1385272826666211229144446] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
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 provides different reaction methods that are involved in the synthesis of a variety of benzothiazole derivatives.
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Affiliation(s)
- Tanzeela Qadir
- Department of Chemistry, School of Chemical Engineering and Physical Sciences, Lovely Professional University, Phagwara, Punjab, India
| | - Andleeb Amin
- Department of Chemistry, School of Chemical Engineering and Physical Sciences, Lovely Professional University, Phagwara, Punjab, India
| | - Alka Salhotra
- Department of Chemistry, School of Chemical Engineering and Physical Sciences, Lovely Professional University, Phagwara, Punjab, India
| | - Praveen Kumar Sharma
- Department of Chemistry, School of Chemical Engineering and Physical Sciences, Lovely Professional University, Phagwara, Punjab, India
| | - Ishtiaq Jeelani
- Graduate School of Innovative Life Science, University of Toyama, 3190 Gofuku 930-8555, Japan
| | - Hitoshi Abe
- Faculty of Engineering, University of Toyama, 3190 Gofuku 930-8555, Japan
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4
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Benzothiazoles from Condensation of o-Aminothiophenoles with Carboxylic Acids and Their Derivatives: A Review. Molecules 2021; 26:molecules26216518. [PMID: 34770926 PMCID: PMC8587170 DOI: 10.3390/molecules26216518] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2021] [Revised: 10/14/2021] [Accepted: 10/21/2021] [Indexed: 01/27/2023] Open
Abstract
Nowadays, organic chemists are interested in the field of heterocyclic chemistry due to its use in the synthesis of a great variety of biologically active compounds. Heterocyclic compounds are widely found in nature and are essential for life. Among these, some natural nitrogen containing heterocyclic compounds have been used as chemotherapeutic agents. Their attachment to sugar molecules either as thioglycosides or as nucleosides analogues plays an important role in vital biological processes as well as in synthetic organic chemistry. Molecules containing benzothiazole (BT) nuclei are of this interesting class of compounds because some of them have been found to have a wide variety of biological activities. In this sense, we selected this topic to review and to then summarize the procedures related to the condensation reactions of o-aminothiophenoles (ATPs) as well as their disulfides with carboxylic acids, esters, orthoesters, acyl chlorides, amides, and nitriles. The condensation reactions with carbon dioxide (CO2) are included. Conventional methods with the use of acid and metal catalysts as well as recent green techniques, such as microwave irradiation, the use of ionic liquids, and ultrasound (US) chemistry, which have proven to have many advantages, were found in the review.
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5
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Potapov VA, Ishigeev RS, Belovezhets LA, Amosova SV. A Novel Family of [1,4]Thiazino[2,3,4- ij]quinolin-4-ium Derivatives: Regioselective Synthesis Based on Unsaturated Heteroatom and Heterocyclic Compounds and Antibacterial Activity. Molecules 2021; 26:5579. [PMID: 34577049 PMCID: PMC8472155 DOI: 10.3390/molecules26185579] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2021] [Revised: 09/08/2021] [Accepted: 09/09/2021] [Indexed: 11/16/2022] Open
Abstract
A novel family of [1,4]thiazino[2,3,4-ij]quinolin-4-ium derivatives was synthesized by annulation reactions of 8-quinolinesulfenyl chloride with unsaturated heteroatom and heterocyclic compounds. It was found that the reactions with 4-pentenoic and 5-hexenoic acids, allyl chloride and bromide, allyl cyanate and vinyl heterocyclic compounds (N-vinyl pyrrolidin-2-one and 1-vinylimidazole) proceeded in a regioselective mode but with the opposite regiochemistry. The reactions with vinyl heterocyclic compounds included electrophilic addition of the sulfur atom of 8-quinolinesulfenyl chloride to the β-carbon atom of the vinyl group. In the case of other substrates, the annulation proceeded with the attachment of the sulfur atom to the α-carbon atom of the vinyl group. The antibacterial activity of novel water-soluble compounds against Enterococcus durans, Bacillus subtilis and Escherichia coli was evaluated. Compounds with high antibacterial activity were found.
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Affiliation(s)
- Vladimir A. Potapov
- A. E. Favorsky Irkutsk Institute of Chemistry, Siberian Division of the Russian Academy of Sciences, 1 Favorsky Str., 664033 Irkutsk, Russia; (R.S.I.); (L.A.B.); (S.V.A.)
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6
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Kittikool T, Phakdeeyothin K, Chantarojsiri T, Yotphan S. Manganese‐Promoted Regioselective Direct
C3
‐Phosphinoylation of 2‐Pyridones. European J Org Chem 2021. [DOI: 10.1002/ejoc.202100336] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Tanakorn Kittikool
- Department of Chemistry and Center of Excellence for Innovation in Chemistry Faculty of Science Mahidol University Rama VI Road 10400 Bangkok Thailand
| | - Kunita Phakdeeyothin
- Department of Chemistry and Center of Excellence for Innovation in Chemistry Faculty of Science Mahidol University Rama VI Road 10400 Bangkok Thailand
| | - Teera Chantarojsiri
- Department of Chemistry and Center of Excellence for Innovation in Chemistry Faculty of Science Mahidol University Rama VI Road 10400 Bangkok Thailand
| | - Sirilata Yotphan
- Department of Chemistry and Center of Excellence for Innovation in Chemistry Faculty of Science Mahidol University Rama VI Road 10400 Bangkok Thailand
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7
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Amer MM, Aziz MA, Shehab WS, Abdellattif MH, Mouneir SM. Recent advances in chemistry and pharmacological aspects of 2-pyridone scaffolds. JOURNAL OF SAUDI CHEMICAL SOCIETY 2021. [DOI: 10.1016/j.jscs.2021.101259] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
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8
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Maddipati VC, Mittal L, Mantipally M, Asthana S, Bhattacharyya S, Gundla R. A Review on the Progress and Prospects of Dengue Drug Discovery Targeting NS5 RNA- Dependent RNA Polymerase. Curr Pharm Des 2021; 26:4386-4409. [PMID: 32445444 DOI: 10.2174/1381612826666200523174753] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2020] [Accepted: 04/15/2020] [Indexed: 02/08/2023]
Abstract
Dengue virus (DENV) infection threatens the health and wellbeing of almost 100 million people in the world. Vectored by mosquitoes, DENV may cause a severe disease in human hosts called Dengue hemorrhagic fever (DHF)/Dengue shock syndrome (DSS), which is not preventable by any known drug. In the absence of a universally-accepted vaccine, a drug capable of inhibiting DENV multiplication is an urgent and unmet clinical need. Here we summarize inhibitory strategies by targeting either host biochemical pathways or virus-encoded proteins. A variety of approaches have been generated to design Directly-acting anti-virals or DAAs targeting different DENV proteins, with diverse success. Among them, DAAs targeting genome replicating viral enzymes have proven effective against many viruses including, Human Immuno-deficiency Virus and Hepatitis C Virus. DAAs may be derived either from existing compound libraries of novel molecules and plant secondary metabolites or devised through Computer-aided Drug design (CADD) methods. Here, we focus on compounds with reported DAA-activity against the DENV RNA-dependent RNA polymerase (RdRp), which replicate the viral RNA genome. The structure-activity relationship (SAR) and toxicity of the natural compounds, including secondary plant metabolites, have been discussed in detail. We have also tabulated novel compounds with known anti-RdRp activity. We concluded with a list of DAAs for which a co-crystal structure with RdRp is reported. Promising hit compounds are often discarded due to poor selectivity or unsuitable pharmacokinetics. We hope this review will provide a useful reference for further studies on the development of an anti-DENV drug.
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Affiliation(s)
- Venkatanarayana C Maddipati
- Department of Chemistry, School of Science, GITAM (Deemed to be University), Hyderabad 502329, Telangana, India
| | - Lovika Mittal
- Translational Health Science and Technology Institute (THSTI), NCR Biotech Science Cluster, 3rdMilestone, Faridabad-Gurugram Expressway, Faridabad - 121001, Haryana, India
| | - Manohar Mantipally
- Department of Chemistry, School of Science, GITAM (Deemed to be University), Hyderabad 502329, Telangana, India
| | - Shailendra Asthana
- Translational Health Science and Technology Institute (THSTI), NCR Biotech Science Cluster, 3rdMilestone, Faridabad-Gurugram Expressway, Faridabad - 121001, Haryana, India
| | - Sankar Bhattacharyya
- Translational Health Science and Technology Institute (THSTI), NCR Biotech Science Cluster, 3rdMilestone, Faridabad-Gurugram Expressway, Faridabad - 121001, Haryana, India
| | - Rambabu Gundla
- Department of Chemistry, School of Science, GITAM (Deemed to be University), Hyderabad 502329, Telangana, India
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9
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Potapov VA, Ishigeev RS, Amosova SV. Efficient Regioselective Synthesis of Novel Water-Soluble 2 H,3 H-[1,4]thiazino[2,3,4- ij]quinolin-4-ium Derivatives by Annulation Reactions of 8-quinolinesulfenyl Halides. Molecules 2021; 26:1116. [PMID: 33672444 PMCID: PMC7923262 DOI: 10.3390/molecules26041116] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2021] [Revised: 02/15/2021] [Accepted: 02/16/2021] [Indexed: 11/24/2022] Open
Abstract
Regioselective synthesis of novel 2H,3H-[1,4]thiazino[2,3,4-ij]quinolin-4-ium derivatives has been developed by annulation reactions of 8-quinolinesulfenyl halides with vinyl chalcogenides (vinyl ethers, divinyl sulfide, divinyl selenide and phenyl vinyl sulfide) and tetravinyl silane. The novel reagent 8-quinolinesulfenyl bromide was used in the annulation reactions. The influence of the substrate structure and the nature of heteroatoms on the direction of the reactions and on product yields has been studied. The opposite regiochemistry was observed in the reactions with vinyl chalcogenides and tetravinyl silane. The obtained condensed heterocycles are novel water-soluble functionalized compounds with promising biological activity.
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Affiliation(s)
- Vladimir A. Potapov
- A. E. Favorsky Irkutsk Institute of Chemistry, Siberian Division of The Russian Academy of Sciences, 1 Favorsky Str., 664033 Irkutsk, Russia; (R.S.I.); (S.V.A.)
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10
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Kumar R, Ginoya V, Semwal R, Adimurthy S. BF 3·Et 2O catalyzed transannulation of pyridotriazoles with isothiocyanates: synthesis of thiazolo[3,4- a]pyridin-3-imines. NEW J CHEM 2021. [DOI: 10.1039/d1nj04033b] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The synthesis of thiazolo[3,4-a]pyridin-3-imines, through denitrogenative transannulation of pyridotriazoles, under transition metal-free conditions is described.
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Affiliation(s)
- Rahul Kumar
- Academy of Scientific & Innovative Research Ghaziabad, CSIR–Central Salt & Marine Chemicals Research Institute, G. B. Marg, Bhavnagar-364 002, Gujarat, India
| | - Vaibhavkumar Ginoya
- Academy of Scientific & Innovative Research Ghaziabad, CSIR–Central Salt & Marine Chemicals Research Institute, G. B. Marg, Bhavnagar-364 002, Gujarat, India
| | - Rashmi Semwal
- Academy of Scientific & Innovative Research Ghaziabad, CSIR–Central Salt & Marine Chemicals Research Institute, G. B. Marg, Bhavnagar-364 002, Gujarat, India
| | - Subbarayappa Adimurthy
- Academy of Scientific & Innovative Research Ghaziabad, CSIR–Central Salt & Marine Chemicals Research Institute, G. B. Marg, Bhavnagar-364 002, Gujarat, India
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Felicetti T, Burali MS, Gwee CP, Ki Chan KW, Alonso S, Massari S, Sabatini S, Tabarrini O, Barreca ML, Cecchetti V, Vasudevan SG, Manfroni G. Sustainable, three-component, one-pot procedure to obtain active anti-flavivirus agents. Eur J Med Chem 2020; 210:112992. [PMID: 33208235 DOI: 10.1016/j.ejmech.2020.112992] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2020] [Revised: 10/30/2020] [Accepted: 11/02/2020] [Indexed: 10/23/2022]
Abstract
The mosquito-borne viruses belonging to the genus Flavivirus such as Dengue virus (DENV) and Zika virus (ZIKV) cause human infections ranging from mild flu-like symptoms to hemorrhagic fevers, hepatitis, and neuropathies. To date, there are vaccines only for few flaviviruses while no effective treatments are available. Pyridobenzothiazole (PBTZ) derivatives are a class of compounds endowed with a promising broad-spectrum anti-flavivirus activity and most of them have been reported as potent inhibitors of the flaviviral NS5 polymerase. However, synthesis of PBTZ analogues entails a high number of purification steps, the use of hazardous reagents and environmentally unsustainable generation of waste. Considering the promising antiviral activity of PBTZ analogues which require further exploration, in this work, we report the development of a new and sustainable three-component reaction (3CR) that can be combined with a basic hydrolysis in a one-pot procedure to obtain the PBTZ scaffold, thus reducing the number of synthetic steps, improving yields and saving time. 3CR was significantly explored in order to demonstrate its wide scope by using different starting materials. In addition, taking advantage of these procedures, we next designed and synthesized a new set of PBTZ analogues that were tested as anti-DENV-2 and anti-ZIKV agents. Compound 22 inhibited DENV-2 NS5 polymerase with an IC50 of 10.4 μM and represented the best anti-flavivirus compound of the new series by inhibiting DENV-2- and ZIKV-infected cells with EC50 values of 1.2 and 5.0 μM, respectively, that translates into attractive selectivity indexes (SI - 83 and 20, respectively). These results strongly reaffirm PBTZ derivatives as promising anti-flavivirus agents that now can be synthesized through a convenient and sustainable 3CR in order to obtain more potent compounds for further pre-clinical development studies.
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Affiliation(s)
- Tommaso Felicetti
- Dipartimento di Scienze Farmaceutiche, Università degli Studi di Perugia, Via Del Liceo, 1-06123, Perugia, Italy
| | - Maria Sole Burali
- Dipartimento di Scienze Farmaceutiche, Università degli Studi di Perugia, Via Del Liceo, 1-06123, Perugia, Italy
| | - Chin Piaw Gwee
- Program in Emerging Infectious Diseases, Duke-NUS Medical School, 169857, Singapore; Infectious Diseases Translational Research Programme, Department of Microbiology & Immunology, Yong Loo Lin School of Medicine, Singapore
| | - Kitti Wing Ki Chan
- Program in Emerging Infectious Diseases, Duke-NUS Medical School, 169857, Singapore
| | - Sylvie Alonso
- Infectious Diseases Translational Research Programme, Department of Microbiology & Immunology, Yong Loo Lin School of Medicine, Singapore; Immunology Programme, Life Sciences Institute, National University of Singapore, 117545, Singapore
| | - Serena Massari
- Dipartimento di Scienze Farmaceutiche, Università degli Studi di Perugia, Via Del Liceo, 1-06123, Perugia, Italy
| | - Stefano Sabatini
- Dipartimento di Scienze Farmaceutiche, Università degli Studi di Perugia, Via Del Liceo, 1-06123, Perugia, Italy
| | - Oriana Tabarrini
- Dipartimento di Scienze Farmaceutiche, Università degli Studi di Perugia, Via Del Liceo, 1-06123, Perugia, Italy
| | - Maria Letizia Barreca
- Dipartimento di Scienze Farmaceutiche, Università degli Studi di Perugia, Via Del Liceo, 1-06123, Perugia, Italy
| | - Violetta Cecchetti
- Dipartimento di Scienze Farmaceutiche, Università degli Studi di Perugia, Via Del Liceo, 1-06123, Perugia, Italy
| | - Subhash G Vasudevan
- Program in Emerging Infectious Diseases, Duke-NUS Medical School, 169857, Singapore; Infectious Diseases Translational Research Programme, Department of Microbiology & Immunology, Yong Loo Lin School of Medicine, Singapore; Institute for Glycomics, Griffith University, Queensland, 4222, Australia
| | - Giuseppe Manfroni
- Dipartimento di Scienze Farmaceutiche, Università degli Studi di Perugia, Via Del Liceo, 1-06123, Perugia, Italy.
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Asiri YI, Alsayari A, Muhsinah AB, Mabkhot YN, Hassan MZ. Benzothiazoles as potential antiviral agents. J Pharm Pharmacol 2020; 72:1459-1480. [PMID: 32705690 PMCID: PMC7405065 DOI: 10.1111/jphp.13331] [Citation(s) in RCA: 42] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2020] [Revised: 06/03/2020] [Accepted: 06/13/2020] [Indexed: 12/11/2022]
Abstract
OBJECTIVES The recent viral pandemic poses a unique challenge for healthcare providers. Despite the remarkable progress, the number of novel antiviral agents in the pipeline is woefully inadequate against the evolving virulence and drug resistance of current viruses. This highlights the urgent need for new and improved vaccines, diagnostics and therapeutic agents to obviate the viral pandemic. KEY FINDINGS Benzothiazole plays a pivotal role in the design and development of antiviral drugs. This is evident from the fact that it comprises many clinically useful agents. The current review is aimed to provide an insight into the recent development of benzothiazole-based antiviral agents, with a special focus on their structure-activity relationships and lead optimisation. One hundred and five articles were initially identified, and from these studies, 64 potential novel lead molecules and main findings were highlighted in this review. SUMMARY We hope this review will provide a logical perspective on the importance of improving the future designs of novel broad-spectrum benzothiazole-based antiviral agents to be used against emerging viral diseases.
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Affiliation(s)
- Yahya I Asiri
- Department of Pharmacology, College of Pharmacy, King Khalid University, Abha, Saudi Arabia
| | - Abdulrhman Alsayari
- Department of Pharmacognosy, College of Pharmacy, King Khalid University, Abha, Saudi Arabia
| | - Abdullatif B Muhsinah
- Department of Pharmacognosy, College of Pharmacy, King Khalid University, Abha, Saudi Arabia
| | - Yahia N Mabkhot
- Department of Pharmaceutical Chemistry, College of Pharmacy, King Khalid University, Abha, Saudi Arabia
| | - Mohd Z Hassan
- Department of Pharmaceutical Chemistry, College of Pharmacy, King Khalid University, Abha, Saudi Arabia
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Shaaban MR, Farghaly TA, Alsaedi AMR. Synthesis, Antimicrobial and Anticancer Evaluations of Novel Thiazoles Incorporated Diphenyl Sulfone Moiety. Polycycl Aromat Compd 2020. [DOI: 10.1080/10406638.2020.1837887] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Mohamed R. Shaaban
- Department of Chemistry, Faculty of Science, Cairo University, Giza, Egypt
- Department of Chemistry, Faculty of Applied Science, Umm Al-Qura University, Makkah al-Mukarramah, Saudi Arabia
| | - Thoraya A. Farghaly
- Department of Chemistry, Faculty of Science, Cairo University, Giza, Egypt
- Department of Chemistry, Faculty of Applied Science, Umm Al-Qura University, Makkah al-Mukarramah, Saudi Arabia
| | - Amani M. R. Alsaedi
- Department of Chemistry, Faculty of Applied Science, Umm Al-Qura University, Makkah al-Mukarramah, Saudi Arabia
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14
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Cannalire R, Ki Chan KW, Burali MS, Gwee CP, Wang S, Astolfi A, Massari S, Sabatini S, Tabarrini O, Mastrangelo E, Barreca ML, Cecchetti V, Vasudevan SG, Manfroni G. Pyridobenzothiazolones Exert Potent Anti-Dengue Activity by Hampering Multiple Functions of NS5 Polymerase. ACS Med Chem Lett 2020; 11:773-782. [PMID: 32435384 DOI: 10.1021/acsmedchemlett.9b00619] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2019] [Accepted: 03/19/2020] [Indexed: 01/23/2023] Open
Abstract
Treatment of dengue virus (DENV) and other flavivirus infections is an unmet medical need. The highly conserved flaviviral NS5 RNA-dependent RNA polymerase (RdRp) is an attractive antiviral target that interacts with NS3 and viral RNA within the replication complex assembly. Biochemical and cell-based evidence indicate that targeting cavity B may lead to dual RdRp and NS5-NS3 interaction inhibitors. By ligand-based design around 1H-pyrido[2,1-b][1,3]benzothiazol-1-one (PBTZ) 1, we identified new potent and selective DENV inhibitors that exert dual inhibition of NS5 RdRp and NS3-NS5 interaction, likely through binding cavity B. Resistance studies with compound 4 generated sequence variants in the 3'-untranslated region of RNA while further biochemical experiments demonstrated its ability to block also RNA-NS5 interaction, required for correct RNA synthesis in cells. These findings shed light on the potential mechanism of action for this class of compounds, underlying how PBTZs are very promising lead candidates for further evaluation.
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Affiliation(s)
- Rolando Cannalire
- Dipartimento di Scienze Farmaceutiche, Università degli Studi di Perugia, Via del Liceo, 1-06123 Perugia, Italy
| | - Kitti Wing Ki Chan
- Program in Emerging Infectious Diseases, Duke-NUS Medical School, 8 College Road, Singapore 169857
| | - Maria Sole Burali
- Dipartimento di Scienze Farmaceutiche, Università degli Studi di Perugia, Via del Liceo, 1-06123 Perugia, Italy
| | - Chin Piaw Gwee
- Program in Emerging Infectious Diseases, Duke-NUS Medical School, 8 College Road, Singapore 169857
| | - Sai Wang
- Program in Emerging Infectious Diseases, Duke-NUS Medical School, 8 College Road, Singapore 169857
| | - Andrea Astolfi
- Dipartimento di Scienze Farmaceutiche, Università degli Studi di Perugia, Via del Liceo, 1-06123 Perugia, Italy
| | - Serena Massari
- Dipartimento di Scienze Farmaceutiche, Università degli Studi di Perugia, Via del Liceo, 1-06123 Perugia, Italy
| | - Stefano Sabatini
- Dipartimento di Scienze Farmaceutiche, Università degli Studi di Perugia, Via del Liceo, 1-06123 Perugia, Italy
| | - Oriana Tabarrini
- Dipartimento di Scienze Farmaceutiche, Università degli Studi di Perugia, Via del Liceo, 1-06123 Perugia, Italy
| | - Eloise Mastrangelo
- Dipartimento di Bioscienze, Università di Milano, Via Celoria 26, I-20133 Milano, Italy
- CNR-IBF, Consiglio Nazionale delle Ricerche, Istituto di Biofisica, Via Celoria 26, I-20133 Milano, Italy
| | - Maria Letizia Barreca
- Dipartimento di Scienze Farmaceutiche, Università degli Studi di Perugia, Via del Liceo, 1-06123 Perugia, Italy
| | - Violetta Cecchetti
- Dipartimento di Scienze Farmaceutiche, Università degli Studi di Perugia, Via del Liceo, 1-06123 Perugia, Italy
| | - Subhash G. Vasudevan
- Program in Emerging Infectious Diseases, Duke-NUS Medical School, 8 College Road, Singapore 169857
- Department of Microbiology and Immunology, National University of Singapore, 5 Science Drive 2, Singapore 117545
- Institute for Glycomics, Griffith University, Gold Coast Campus, Queensland 4022, Australia
| | - Giuseppe Manfroni
- Dipartimento di Scienze Farmaceutiche, Università degli Studi di Perugia, Via del Liceo, 1-06123 Perugia, Italy
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Potapov VA, Ishigeev RS, Shkurchenko IV, Zinchenko SV, Amosova SV. Natural Compounds and Their Structural Analogs in Regio- and Stereoselective Synthesis of New Families of Water-Soluble 2 H,3 H-[1,3]thia- and -Selenazolo[3,2- a]pyridin-4-ium Heterocycles by Annulation Reactions. Molecules 2020; 25:E376. [PMID: 31963275 PMCID: PMC7024257 DOI: 10.3390/molecules25020376] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2019] [Revised: 01/05/2020] [Accepted: 01/13/2020] [Indexed: 01/22/2023] Open
Abstract
It has been found that both eugenol and isoeugenol derivatives reacted with 2-pyridinesulfenyl and 2-pyridineselenenyl halides in a regioselective mode affording products with opposite regiochemistry. Synthesis of new families of 2H,3H-[1,3]thia- and -selenazolo[3,2-a]pyridin-4-ium heterocycles has been developed by annulation reactions of 2-pyridinechalcogenyl halides with natural compounds (eugenol, isoeugenol, methyl eugenol, methyl isoeugenol, acetyl eugenol, trans-anethole) and their structural analogs. The influence of the substrate structure and the nature of halogen on the product yields are studied. The 2-pyridinesulfenyl and 2-pyridineselenenyl chlorides are more efficient reagents compared to corresponding bromides. The obtained condensed heterocycles are novel water-soluble functionalized compounds with promising biological activity.
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Affiliation(s)
- Vladimir A. Potapov
- A. E. Favorsky Irkutsk Institute of Chemistry, Siberian Division of The Russian Academy of Sciences, 1 Favorsky Str., Irkutsk 664033, Russian; (R.S.I.); (I.V.S.); (S.V.Z.); (S.V.A.)
| | - Roman S. Ishigeev
- A. E. Favorsky Irkutsk Institute of Chemistry, Siberian Division of The Russian Academy of Sciences, 1 Favorsky Str., Irkutsk 664033, Russian; (R.S.I.); (I.V.S.); (S.V.Z.); (S.V.A.)
| | - Irina V. Shkurchenko
- A. E. Favorsky Irkutsk Institute of Chemistry, Siberian Division of The Russian Academy of Sciences, 1 Favorsky Str., Irkutsk 664033, Russian; (R.S.I.); (I.V.S.); (S.V.Z.); (S.V.A.)
- Pedagogical Institute, Irkutsk State University, 6 Nizhniaja Naberezhnaya Str., Irkutsk 664003, Russia
| | - Sergey V. Zinchenko
- A. E. Favorsky Irkutsk Institute of Chemistry, Siberian Division of The Russian Academy of Sciences, 1 Favorsky Str., Irkutsk 664033, Russian; (R.S.I.); (I.V.S.); (S.V.Z.); (S.V.A.)
| | - Svetlana V. Amosova
- A. E. Favorsky Irkutsk Institute of Chemistry, Siberian Division of The Russian Academy of Sciences, 1 Favorsky Str., Irkutsk 664033, Russian; (R.S.I.); (I.V.S.); (S.V.Z.); (S.V.A.)
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16
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Phakdeeyothin K, Yotphan S. Metal-free regioselective direct thiolation of 2-pyridones. Org Biomol Chem 2019; 17:6432-6440. [PMID: 31218319 DOI: 10.1039/c9ob01061k] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
A highly regioselective metal-free direct C-H thiolation of 2-pyridones with disulfides or thiols has been developed. A combination of persulfate and a commercially available halide source such as LiCl, NCS or I2 enables the successful direct incorporation of a sulfide moiety into the 5-position of pyridone under mild conditions, providing a useful and convenient approach for the preparation of a diverse array of 5-thio-substituted pyridones in moderate to excellent yields.
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Affiliation(s)
- Kunita Phakdeeyothin
- Department of Chemistry and Center of Excellence for Innovation in Chemistry, Faculty of Science, Mahidol University, Bangkok 10400, Thailand.
| | - Sirilata Yotphan
- Department of Chemistry and Center of Excellence for Innovation in Chemistry, Faculty of Science, Mahidol University, Bangkok 10400, Thailand.
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17
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Broad spectrum anti-flavivirus pyridobenzothiazolones leading to less infective virions. Antiviral Res 2019; 167:6-12. [DOI: 10.1016/j.antiviral.2019.03.004] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2018] [Revised: 02/27/2019] [Accepted: 03/04/2019] [Indexed: 11/22/2022]
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18
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Synthesis of a novel family of water-soluble 2H,3H-[1,3]thia- and -selenazolo[3,2-a]pyridin-4-ium heterocycles by annulation reactions. Tetrahedron Lett 2019. [DOI: 10.1016/j.tetlet.2019.01.001] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
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19
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Synthesis of 5-imino- and 5-oxothiazolo[3,2-a]pyridines (microreview). Chem Heterocycl Compd (N Y) 2018. [DOI: 10.1007/s10593-018-2192-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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20
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Gao F, Han X, Li C, Liu L, Cong Z, Liu H. Cobalt(iii)-catalyzed site-selective C–H amidation of pyridones and isoquinolones. RSC Adv 2018; 8:32659-32663. [PMID: 35547693 PMCID: PMC9086233 DOI: 10.1039/c8ra06716c] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2018] [Accepted: 09/12/2018] [Indexed: 01/22/2023] Open
Abstract
In this study, Cp*Co(iii)-catalyzed site-selective amidation of pyridones and isoquinolones using oxazolones as the amidation reagent is reported.
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Affiliation(s)
- Feng Gao
- State Key Laboratory of Drug Research
- Shanghai Institute of Materia Medica
- Chinese Academy of Sciences
- Shanghai
- China
| | - Xu Han
- State Key Laboratory of Drug Research
- Shanghai Institute of Materia Medica
- Chinese Academy of Sciences
- Shanghai
- China
| | - Chunpu Li
- State Key Laboratory of Drug Research
- Shanghai Institute of Materia Medica
- Chinese Academy of Sciences
- Shanghai
- China
| | - Lingjun Liu
- State Key Laboratory of Drug Research
- Shanghai Institute of Materia Medica
- Chinese Academy of Sciences
- Shanghai
- China
| | - Zhanqing Cong
- State Key Laboratory of Drug Research
- Shanghai Institute of Materia Medica
- Chinese Academy of Sciences
- Shanghai
- China
| | - Hong Liu
- State Key Laboratory of Drug Research
- Shanghai Institute of Materia Medica
- Chinese Academy of Sciences
- Shanghai
- China
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Cannalire R, Tarantino D, Astolfi A, Barreca ML, Sabatini S, Massari S, Tabarrini O, Milani M, Querat G, Mastrangelo E, Manfroni G, Cecchetti V. Functionalized 2,1-benzothiazine 2,2-dioxides as new inhibitors of Dengue NS5 RNA-dependent RNA polymerase. Eur J Med Chem 2017; 143:1667-1676. [PMID: 29137867 DOI: 10.1016/j.ejmech.2017.10.064] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2017] [Revised: 10/05/2017] [Accepted: 10/23/2017] [Indexed: 12/11/2022]
Abstract
Over recent years, many RNA viruses have been "re-discovered", including life-threatening flaviviruses, such as Dengue, Zika, and several encephalitis viruses. Since no specific inhibitors are currently available to treat these infections, there is a pressing need for new therapeutics. Among the flaviviral proteins, NS5 RNA-dependent RNA polymerase (RdRp) represents a validated target being essential for viral replication and it has no human analog. To date, few NS5 RdRp inhibitor chemotypes have been reported and no inhibitors are currently in clinical development. In this context, after an in vitro screening against Dengue 3 NS5 RdRp of our in-house HCV NS5B inhibitors focused library, we found that 2,1-benzothiazine 2,2-dioxides are promising non-nucleoside inhibitors of flaviviral RdRp with compounds 8 and 10 showing IC50 of 0.6 and 0.9 μM, respectively. Preliminary structure-activity relationships indicated a key role for the C-4 benzoyl group and the importance of a properly functionalized C-6 phenoxy moiety to modulate potency. Compound 8 acts as non-competitive inhibitor and its proposed pose in the so-called N pocket of the RdRp thumb domain allowed to explain the key contribution of the benzoyl and the phenoxy moieties for the ligand binding.
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Affiliation(s)
- Rolando Cannalire
- Dipartimento di Scienze Farmaceutiche, Università degli Studi di Perugia, Via del Liceo, 1-06123 Perugia, Italy
| | - Delia Tarantino
- Dipartimento di Bioscienze, Università di Milano, Via Celoria 26, I-20133 Milano, Italy; CNR-IBF, Consiglio Nazionale delle Ricerche, Istituto di Biofisica, Via Celoria 26, I-20133 Milano, Italy
| | - Andrea Astolfi
- Dipartimento di Scienze Farmaceutiche, Università degli Studi di Perugia, Via del Liceo, 1-06123 Perugia, Italy
| | - Maria Letizia Barreca
- Dipartimento di Scienze Farmaceutiche, Università degli Studi di Perugia, Via del Liceo, 1-06123 Perugia, Italy
| | - Stefano Sabatini
- Dipartimento di Scienze Farmaceutiche, Università degli Studi di Perugia, Via del Liceo, 1-06123 Perugia, Italy
| | - Serena Massari
- Dipartimento di Scienze Farmaceutiche, Università degli Studi di Perugia, Via del Liceo, 1-06123 Perugia, Italy
| | - Oriana Tabarrini
- Dipartimento di Scienze Farmaceutiche, Università degli Studi di Perugia, Via del Liceo, 1-06123 Perugia, Italy
| | - Mario Milani
- Dipartimento di Bioscienze, Università di Milano, Via Celoria 26, I-20133 Milano, Italy; CNR-IBF, Consiglio Nazionale delle Ricerche, Istituto di Biofisica, Via Celoria 26, I-20133 Milano, Italy
| | - Gilles Querat
- UMR "Emergence des Pathologies Virales" (Aix-Marseille University - IRD 190 - Inserm 1207 - EHESP) & Fondation IHU Méditerranée Infection, APHM Public Hospitals of Marseille, Faculté de Médecine, 27 bd Jean Moulin, 13005 Marseille France
| | - Eloise Mastrangelo
- Dipartimento di Bioscienze, Università di Milano, Via Celoria 26, I-20133 Milano, Italy; CNR-IBF, Consiglio Nazionale delle Ricerche, Istituto di Biofisica, Via Celoria 26, I-20133 Milano, Italy.
| | - Giuseppe Manfroni
- Dipartimento di Scienze Farmaceutiche, Università degli Studi di Perugia, Via del Liceo, 1-06123 Perugia, Italy.
| | - Violetta Cecchetti
- Dipartimento di Scienze Farmaceutiche, Università degli Studi di Perugia, Via del Liceo, 1-06123 Perugia, Italy
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22
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Mallikarjuna Reddy L, Lavanya G, Lakshmi Teja G, Padmaja A, Padmavathi V. Synthesis and Antibacterial Activity of Sulfur-linked Bis and Tris Heterocycles. J Heterocycl Chem 2017. [DOI: 10.1002/jhet.2878] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- L. Mallikarjuna Reddy
- Department of Chemistry; Sri Venkateswara University; Tirupati 517 502 Andhra Pradesh India
| | - G. Lavanya
- Department of Chemistry; Sri Venkateswara University; Tirupati 517 502 Andhra Pradesh India
| | - G. Lakshmi Teja
- Department of Chemistry; Sri Venkateswara University; Tirupati 517 502 Andhra Pradesh India
| | - A. Padmaja
- Department of Chemistry; Sri Venkateswara University; Tirupati 517 502 Andhra Pradesh India
| | - V. Padmavathi
- Department of Chemistry; Sri Venkateswara University; Tirupati 517 502 Andhra Pradesh India
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23
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Peng P, Wang J, Jiang H, Liu H. Rhodium(III)-Catalyzed Site-Selective C-H Alkylation and Arylation of Pyridones Using Organoboron Reagents. Org Lett 2016; 18:5376-5379. [PMID: 27736078 DOI: 10.1021/acs.orglett.6b02755] [Citation(s) in RCA: 58] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
In this study we developed a method for the pyridine-directed, rhodium-catalyzed, site-selective C-H alkylation and arylation of pyridones using commercially available trifluoroborate reagents. This simple and versatile transformation proceeded smoothly under relatively mild conditions with perfect site selectivity. The coupling groups in the boron reagents can be extended to primary alkyl, benzyl, and cycloalkyl. Moreover, direct C-H arylation products could also be obtained under similar conditions.
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Affiliation(s)
- Panfeng Peng
- CAS Key Laboratory of Receptor Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences , 555 Zu Chong Zhi Road, Shanghai 201203, P. R. China.,School of Pharmaceutical Engineering, Shenyang Pharmaceutical University , 103 Wen Hua Road, Liaoning, Shenyang 110016, China
| | - Jiang Wang
- CAS Key Laboratory of Receptor Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences , 555 Zu Chong Zhi Road, Shanghai 201203, P. R. China
| | - Hualiang Jiang
- CAS Key Laboratory of Receptor Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences , 555 Zu Chong Zhi Road, Shanghai 201203, P. R. China.,School of Pharmaceutical Engineering, Shenyang Pharmaceutical University , 103 Wen Hua Road, Liaoning, Shenyang 110016, China
| | - Hong Liu
- CAS Key Laboratory of Receptor Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences , 555 Zu Chong Zhi Road, Shanghai 201203, P. R. China
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24
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Tarantino D, Cannalire R, Mastrangelo E, Croci R, Querat G, Barreca ML, Bolognesi M, Manfroni G, Cecchetti V, Milani M. Targeting flavivirus RNA dependent RNA polymerase through a pyridobenzothiazole inhibitor. Antiviral Res 2016; 134:226-235. [PMID: 27649989 DOI: 10.1016/j.antiviral.2016.09.007] [Citation(s) in RCA: 44] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2016] [Revised: 09/12/2016] [Accepted: 09/16/2016] [Indexed: 12/31/2022]
Abstract
RNA dependent RNA polymerases (RdRp) are essential enzymes for flavivirus replication. Starting from an in silico docking analysis we identified a pyridobenzothiazole compound, HeE1-2Tyr, able to inhibit West Nile and Dengue RdRps activity in vitro, which proved effective against different flaviviruses in cell culture. Crystallographic data show that HeE1-2Tyr binds between the fingers domain and the priming loop of Dengue virus RdRp (Site 1). Conversely, enzyme kinetics, binding studies and mutational analyses suggest that, during the catalytic cycle and assembly of the RdRp-RNA complex, HeE1-2Tyr might be hosted in a distinct binding site (Site 2). RdRp mutational studies, driven by in silico docking analysis, allowed us to locate the inhibition Site 2 in the thumb domain. Taken together, our results provide innovative concepts for optimization of a new class of anti-flavivirus compounds.
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Affiliation(s)
- Delia Tarantino
- Dipartimento di Bioscienze, Università di Milano, Via Celoria 26, I-20133, Milano, Italy; CNR-IBF, Istituto di Biofisica, Via Celoria 26, I-20133, Milano, Italy
| | - Rolando Cannalire
- Dipartimento di Scienze Farmaceutiche, Università degli Studi di Perugia, Perugia, Italy
| | - Eloise Mastrangelo
- Dipartimento di Bioscienze, Università di Milano, Via Celoria 26, I-20133, Milano, Italy; CNR-IBF, Istituto di Biofisica, Via Celoria 26, I-20133, Milano, Italy
| | - Romina Croci
- Dipartimento di Bioscienze, Università di Milano, Via Celoria 26, I-20133, Milano, Italy
| | - Gilles Querat
- UMR "Emergence des Pathologies Virales" (EPV: Aix-Marseille university - IRD 190 - Inserm 1207 - EHESP), & Fondation IHU Méditerranée Infection, APHM Public Hospitals of Marseille, Marseille, France
| | - Maria Letizia Barreca
- Dipartimento di Scienze Farmaceutiche, Università degli Studi di Perugia, Perugia, Italy
| | - Martino Bolognesi
- Dipartimento di Bioscienze, Università di Milano, Via Celoria 26, I-20133, Milano, Italy; CNR-IBF, Istituto di Biofisica, Via Celoria 26, I-20133, Milano, Italy
| | - Giuseppe Manfroni
- Dipartimento di Scienze Farmaceutiche, Università degli Studi di Perugia, Perugia, Italy.
| | - Violetta Cecchetti
- Dipartimento di Scienze Farmaceutiche, Università degli Studi di Perugia, Perugia, Italy
| | - Mario Milani
- Dipartimento di Bioscienze, Università di Milano, Via Celoria 26, I-20133, Milano, Italy; CNR-IBF, Istituto di Biofisica, Via Celoria 26, I-20133, Milano, Italy.
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Peng P, Wang J, Li C, Zhu W, Jiang H, Liu H. Cu(ii)-catalyzed C6-selective C–H thiolation of 2-pyridones using air as the oxidant. RSC Adv 2016. [DOI: 10.1039/c6ra04388g] [Citation(s) in RCA: 44] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Cu(II)-catalyzed C6-selective C–H thiolation of 2-pyridones with aryl and alkyl disulfides to provide functional thioethers has been achieved.
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Affiliation(s)
- Panfeng Peng
- School of Pharmaceutical Engineering
- Shenyang Pharmaceutical University
- Liaoning
- China
- CAS Key Laboratory of Receptor Research
| | - Jiang Wang
- CAS Key Laboratory of Receptor Research
- Shanghai Institute of Materia Medica
- Chinese Academy of Sciences
- Shanghai 201203
- People's Republic of China
| | - Chunpu Li
- CAS Key Laboratory of Receptor Research
- Shanghai Institute of Materia Medica
- Chinese Academy of Sciences
- Shanghai 201203
- People's Republic of China
| | - Wei Zhu
- CAS Key Laboratory of Receptor Research
- Shanghai Institute of Materia Medica
- Chinese Academy of Sciences
- Shanghai 201203
- People's Republic of China
| | - Hualiang Jiang
- School of Pharmaceutical Engineering
- Shenyang Pharmaceutical University
- Liaoning
- China
- CAS Key Laboratory of Receptor Research
| | - Hong Liu
- CAS Key Laboratory of Receptor Research
- Shanghai Institute of Materia Medica
- Chinese Academy of Sciences
- Shanghai 201203
- People's Republic of China
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Design, synthesis, structure information and biochemical activity of new floro substituted organotin(IV) carboxylates. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY 2015; 154:99-107. [PMID: 26708070 DOI: 10.1016/j.jphotobiol.2015.10.011] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/05/2015] [Revised: 10/11/2015] [Accepted: 10/15/2015] [Indexed: 12/24/2022]
Abstract
Four new triorganotin(IV) complexes with general formula R3SnL (R=C4H9, C6H5, and L=3-[(fluorophenylamido)]propenoic acid, 3-[(fluorophenylamido)]propanoic acid) were synthesized and characterized by elemental analyses, FT-IR, NMR ((1)H, (13)C and (119)Sn), mass spectrometry and single crystal X-ray structural analysis. The disappearance of the OH peak of the carboxylic acid in the FT-IR and NMR spectra of the compounds conform the formation of the compound and suggests that the complexation occurs via oxygen atoms of the carboxylate moiety. FT-IR date shows the bidentate nature of the carboxylate moiety of the ligand as the Δν value in all complexes is less than 250. Crystallographic data for compound 2 showed that tin has distorted tetrahedral geometry with 433.42° angle around the central tin atom. The compounds (1-4) bind to DNA, resulting hypochromism shifts in UV-visible spectroscopy suggesting an intercalative mode of interactions. The compound-DNA interaction results (UV-visible and Viscometery) encourage using the compounds against HCV. The compounds (1-4) were screened for anti-HCV activity using Huh7.5 cell (human hepatoma cell) by the Gaussia Luciferase Assay and found to be biologically active. Based on Gaussia Luciferase Assay, compound 3 (Tributylstannic [3-(2-fluorophenylamido)propionate]) was taken for quantitative analysis by "QRT-PCR" using the serum of HCV patients and was found to have substantial anti-HCV activity. This work, demonstrated that compound 3 may be used as a potential anti-HCV agent in the future.
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Manfroni G, Manvar D, Barreca ML, Kaushik-Basu N, Leyssen P, Paeshuyse J, Cannalire R, Iraci N, Basu A, Chudaev M, Zamperini C, Dreassi E, Sabatini S, Tabarrini O, Neyts J, Cecchetti V. New pyrazolobenzothiazine derivatives as hepatitis C virus NS5B polymerase palm site I inhibitors. J Med Chem 2014; 57:3247-62. [PMID: 24654886 PMCID: PMC4203399 DOI: 10.1021/jm401688h] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
We have previously identified the pyrazolobenzothiazine scaffold as a promising chemotype against hepatitis C virus (HCV) NS5B polymerase, a validated and promising anti-HCV target. Herein we describe the design, synthesis, enzymatic, and cellular characterization of new pyrazolobenzothiazines as anti-HCV inhibitors. The binding site for a representative derivative was mapped to NS5B palm site I employing a mutant counterscreen assay, thus validating our previous in silico predictions. Derivative 2b proved to be the best selective anti-HCV derivative within the new series, exhibiting a IC50 of 7.9 μM against NS5B polymerase and antiviral effect (EC50 = 8.1 μM; EC90 = 23.3 μM) coupled with the absence of any antimetabolic effect (CC50 > 224 μM; SI > 28) in a cell based HCV replicon system assay. Significantly, microscopic analysis showed that, unlike the parent compounds, derivative 2b did not show any significant cell morphological alterations. Furthermore, since most of the pyrazolobenzothiazines tested altered cell morphology, this undesired aspect was further investigated by exploring possible perturbation of lipid metabolism during compound treatment.
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Affiliation(s)
- Giuseppe Manfroni
- Dipartimento di Scienze Farmaceutiche, Università degli Studi di Perugia , Via A. Fabretti 48, 06123 Perugia, Italy
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Prajapati NP, Vekariya RH, Borad MA, Patel HD. Recent advances in the synthesis of 2-substituted benzothiazoles: a review. RSC Adv 2014. [DOI: 10.1039/c4ra07437h] [Citation(s) in RCA: 107] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
Recent advances in various synthetic protocols of 2-substituted benzothiazole derivatives.
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Affiliation(s)
| | - Rajesh H. Vekariya
- Department of Chemistry
- School of Sciences
- Gujarat University
- Ahmedabad, India
| | - Mayuri A. Borad
- Department of Chemistry
- School of Sciences
- Gujarat University
- Ahmedabad, India
| | - Hitesh D. Patel
- Department of Chemistry
- School of Sciences
- Gujarat University
- Ahmedabad, India
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30
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Tributyltin(IV)[3-(3′,5′-dimethylphenylamido)propanoate] as a potent HCV inhibitor, its delivery study, controlled release and binding sites using CTAB as a standard cell membrane. Appl Organomet Chem 2013. [DOI: 10.1002/aoc.3079] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
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31
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Manfroni G, Cannalire R, Barreca ML, Kaushik-Basu N, Leyssen P, Winquist J, Iraci N, Manvar D, Paeshuyse J, Guhamazumder R, Basu A, Sabatini S, Tabarrini O, Danielson UH, Neyts J, Cecchetti V. The versatile nature of the 6-aminoquinolone scaffold: identification of submicromolar hepatitis C virus NS5B inhibitors. J Med Chem 2013; 57:1952-63. [PMID: 24131104 DOI: 10.1021/jm401362f] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
We have previously reported that the 6-aminoquinolone chemotype is a privileged scaffold to obtain antibacterial and antiviral agents. Herein we describe the design, synthesis, and enzymatic and cellular characterization of new 6-aminoquinolone derivatives as potent inhibitors of NS5B polymerase, an attractive and viable therapeutic target to develop safe anti-HCV agents. The 6-amino-7-[4-(2-pyridinyl)-1-piperazinyl]quinolone derivative 8 proved to be the best compound of this series, exhibiting an IC50 value of 0.069 μM against NS5B polymerase and selective antiviral effect (EC50 = 3.03 μM) coupled with the absence of any cytostatic effect (CC50 > 163 μM; SI > 54) in Huh 9-13 cells carrying a HCV genotype 1b, as measured by MTS assay. These results indicate that the 6-aminoquinolone scaffold is worthy of further investigation in the context of NS5B-targeted HCV drug discovery programs.
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Affiliation(s)
- Giuseppe Manfroni
- Dipartimento di Chimica e Tecnologia del Farmaco, Università degli Studi di Perugia , Via del Liceo 1, 06123 Perugia, Italy
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32
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Accounting for Target Flexibility and Water Molecules by Docking to Ensembles of Target Structures: The HCV NS5B Palm Site I Inhibitors Case Study. J Chem Inf Model 2013; 54:481-97. [DOI: 10.1021/ci400367m] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
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33
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Structure modeling and docking study of HCV NS5B-3a RNA polymerase for the identification of potent inhibitors. Med Chem Res 2013. [DOI: 10.1007/s00044-013-0666-5] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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34
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Racané L, Pavelić SK, Nhili R, Depauw S, Paul-Constant C, Ratkaj I, David-Cordonnier MH, Pavelić K, Tralić-Kulenović V, Karminski-Zamola G. New anticancer active and selective phenylene-bisbenzothiazoles: synthesis, antiproliferative evaluation and DNA binding. Eur J Med Chem 2013; 63:882-91. [PMID: 23603616 DOI: 10.1016/j.ejmech.2013.02.026] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2013] [Revised: 02/21/2013] [Accepted: 02/22/2013] [Indexed: 11/25/2022]
Abstract
Novel amidino-derivatives of phenylene-bisbenzothiazoles were synthesized and tested for their antiproliferative activity against several human cancer cell lines, as well as DNA-binding properties. The synthetic approach used for preparation of isomeric amidino substituted-phenylene-bis-benzothyazoles 3a-3f was achieved by condensation reaction of isophthaloyl dichloride 1a and terephthaloyl dichloride 1b or with phthalic acid 1c with 5-amidinium-2-aminobenzothiolate 2a and 5-(imidazolinium-2-yl)-2-aminobenzothiolate 2b in good yields. 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. All tested compounds (3a-3f) showed antiproliferative effects on tumour cells in a concentration-dependant manner. The strongest activity and cytotoxicity was observed for diimidazolinyl substituted phenylene-bisbenzothiazole compound 3b. These effects were shown to be related to DNA-binding properties, topoisomerase I and II poisoning effects and apoptosis induction. The highest tested selectivity towards tumour cells was observed for the imidazolyl substituted phenylene-benzothiazole 3d that showed no cytotoxic effects on normal fibroblasts making it an excellent candidate for further chemical optimization and preclinical evaluation.
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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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Barreca ML, Manfroni G, Leyssen P, Winquist J, Kaushik-Basu N, Paeshuyse J, Krishnan R, Iraci N, Sabatini S, Tabarrini O, Basu A, Danielson UH, Neyts J, Cecchetti V. Structure-based discovery of pyrazolobenzothiazine derivatives as inhibitors of hepatitis C virus replication. J Med Chem 2013; 56:2270-82. [PMID: 23409936 DOI: 10.1021/jm301643a] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
The NS5B RNA-dependent RNA polymerase is an attractive target for the development of novel and selective inhibitors of hepatitis C virus replication. To identify novel structural hits as anti-HCV agents, we performed structure-based virtual screening of our in-house library followed by rational drug design, organic synthesis, and biological testing. These studies led to the identification of pyrazolobenzothiazine scaffold as a suitable template for obtaining novel anti-HCV agents targeting the NS5B polymerase. The best compound of this series was the meta-fluoro-N-1-phenyl pyrazolobenzothiazine derivative 4a, which exhibited an EC50 = 3.6 μM, EC90 = 25.6 μM, and CC50 > 180 μM in the Huh 9-13 replicon system, thus providing a good starting point for further hit evolution.
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Affiliation(s)
- Maria Letizia Barreca
- Dipartimento di Chimica e Tecnologia del Farmaco, Sezione di Chimica Farmaceutica II, Università degli Studi di Perugia, Via del Liceo 1, 06123 Perugia, Italy.
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