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Rao RN, Das S, Jacob K, Alam MM, Balamurali MM, Chanda K. Synthetic access to diverse thiazetidines via a one-pot microwave assisted telescopic approach and their interaction with biomolecules. Org Biomol Chem 2024; 22:3249-3261. [PMID: 38568016 DOI: 10.1039/d4ob00075g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/25/2024]
Abstract
A one-pot microwave assisted telescopic approach is reported for the chemo-selective synthesis of substituted 1,3-thiazetidines using readily available 2-aminopyridines/pyrazines/pyrimidine, substituted isothiocyanates and 1,2-dihalomethanes. The procedure involves thiourea formation from 2-aminopyridines/pyrazines/pyrimidine with the substituted isothiocyanates followed by a base catalysed nucleophilic attack of the CS bond on the 1,2-dihalomethane. Subsequently, a cyclization reaction occurs to yield substituted 1,3-thiazetidines. These four membered strained ring systems are reported to possess broad substrate scope with high functional group tolerance. The above synthetic sequence for the formation of four membered heterocycles is proven to be a modular and straightforward approach. Further the mechanistic pathway for the formation of 1,3-thiazetidines was supported by computational evaluations and X-ray crystallography analyses. The relevance of these thiazetidines in biological applications is evaluated by studying their ability to bind bio-macromolecules like proteins and nucleic acids.
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Affiliation(s)
- Ramdas Nishanth Rao
- Department of Chemistry, School of Advanced Sciences, Vellore Institute of Technology, Vellore 632014, India.
| | - Soumyadip Das
- Department of Chemistry, School of Advanced Sciences, Vellore Institute of Technology, Vellore 632014, India.
| | - Kezia Jacob
- Department of Chemistry, School of Advanced Sciences, Vellore Institute of Technology, Vellore 632014, India.
| | - Mohammed Mujahid Alam
- Department of Chemistry, College of Science, King Khalid University, P.O. Box 9004, Abha 61413, Saudi Arabia
| | - M M Balamurali
- Chemistry Division, School of Advanced Sciences, Vellore Institute of Technology, Chennai, Tamil Nadu, 600027, India.
| | - Kaushik Chanda
- Department of Chemistry, School of Advanced Sciences, Vellore Institute of Technology, Vellore 632014, India.
- Department of Chemistry, Rabindranath Tagore University, Hojai 782435, Assam, India
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Ghasemi‐Ghahsareh A, Safaei‐Ghomi J, Oboudatian HS. Ultrasound Probe‐assisted Telescopic One‐pot Synthesis of Spiro[indene‐2,2’‐naphthalene]‐4’‐carbonitrile Derivatives using Fe
3
O
4
@SCH
2
CO
2
H@Ni‐NH
2
as a Reusable Nanocatalyst. ChemistrySelect 2023. [DOI: 10.1002/slct.202201795] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Affiliation(s)
- Aref Ghasemi‐Ghahsareh
- Department of Organic Chemistry Faculty of Chemistry University of Kashan Kashan 51167 I. R. Iran
| | - Javad Safaei‐Ghomi
- Department of Organic Chemistry Faculty of Chemistry University of Kashan Kashan 51167 I. R. Iran
| | - Hourieh Sadat Oboudatian
- Department of Organic Chemistry Faculty of Chemistry University of Kashan Kashan 51167 I. R. Iran
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3
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Dasmahapatra U, Chanda K. Synthetic approaches to potent heterocyclic inhibitors of tuberculosis: A decade review. Front Pharmacol 2022; 13:1021216. [DOI: 10.3389/fphar.2022.1021216] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2022] [Accepted: 10/03/2022] [Indexed: 11/13/2022] Open
Abstract
Tuberculosis (TB) continues to be a significant global health concern with about 1.5 million deaths annually. Despite efforts to develop more efficient vaccines, reliable diagnostics, and chemotherapeutics, tuberculosis has become a concern to world health due to HIV, the rapid growth of bacteria that are resistant to treatment, and the recently introduced COVID-19 pandemic. As is well known, advances in synthetic organic chemistry have historically enabled the production of important life-saving medications that have had a tremendous impact on patients’ lives and health all over the world. Small-molecule research as a novel chemical entity for a specific disease target offers in-depth knowledge and potential therapeutic targets. In this viewpoint, we concentrated on the synthesis of a number of heterocycles reported in the previous decade and the screening of their inhibitory action against diverse strains of Mycobacterium tuberculosis. These findings offer specific details on the structure-based activity of several heterocyclic scaffolds backed by their in vitro tests as a promising class of antitubercular medicines, which will be further useful to build effective treatments to prevent this terrible illness.
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Abstract
2-Aminopyridine is a simple, low molecular weight and perfectly functionalised moiety known for the synthesis of diverse biological molecules. Many pharmaceutical companies across the globe aim to synthesise low-molecular weight molecules for use as pharmacophores against various biological targets. 2-Aminopyridine can serve as a perfect locomotive in the synthesis and pulling of such molecules towards respective pharmacological goals. The major advantage of this moiety is its simple design, which can be used to produce single products with minimum side reactions. Moreover, the exact weight of synthesised compounds is low, which enables facile identification of toxicity-causing metabolites in drug discovery programmes. This manuscript is a quick review of such pharmacophores derived from 2-aminopyridine.
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Affiliation(s)
- Ramdas Nishanth Rao
- Department of Chemistry, School of Advanced Science, Vellore Institute of Technology, Vellore 632014, India.
| | - Kaushik Chanda
- Department of Chemistry, School of Advanced Science, Vellore Institute of Technology, Vellore 632014, India.
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Das S, Chanda K. An overview of metal-free synthetic routes to isoxazoles: the privileged scaffold. RSC Adv 2021; 11:32680-32705. [PMID: 35493554 PMCID: PMC9042182 DOI: 10.1039/d1ra04624a] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2021] [Accepted: 09/11/2021] [Indexed: 12/19/2022] Open
Abstract
In the field of drug discovery, isoxazole is a five-membered heterocyclic moiety commonly found in many commercially available drugs. In view of their enormous significance, it is always imperative to unleash new eco-friendly synthetic strategies. Among various novel synthetic techniques in use for isoxazole synthesis, most synthetic methods employ Cu(i) or Ru(ii) as catalysts for (3 + 2) cycloaddition reaction. The particular disadvantages associated with metal-catalyzed reactions are high costs, low abundance, toxicity, a significant generation of waste, and difficulty to separate from the reaction mixtures. In view of these drawbacks, it is always imperative to develop alternate metal-free synthetic routes. This review article highlights a comprehensive overview on the potential application of metal-free synthetic routes for the synthesis of isoxazoles with significant biological interests.
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Affiliation(s)
- Soumyadip Das
- Department of Chemistry, School of Advanced Sciences, Vellore Institute of Technology Vellore-632014 India
| | - Kaushik Chanda
- Department of Chemistry, School of Advanced Sciences, Vellore Institute of Technology Vellore-632014 India
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Rao RN, Chanda K. An expeditious microwave assisted one-pot sequential route to pyrido fused imidazo[4,5- c] quinolines in green media. NEW J CHEM 2021. [DOI: 10.1039/d0nj05835a] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
A novel one-pot sequential route for the synthesis of pyrido[2′,1′:2,3]imidazo[4,5-c]quinolines via microwave-assisted sequential reaction of 2-aminopyridines, 2-bromophenacyl bromides, and aldehydes has been developed in green media.
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Affiliation(s)
- Ramdas Nishanth Rao
- Department of Chemistry
- School of Advanced Science
- Vellore Institute of Technology
- Vellore-632014
- India
| | - Kaushik Chanda
- Department of Chemistry
- School of Advanced Science
- Vellore Institute of Technology
- Vellore-632014
- India
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7
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Saikia AA, Rao RN, Maiti B, Balamurali MM, Chanda K. Diversity-Oriented Synthesis of Thiazolidine-2-imines via Microwave-Assisted One-Pot, Telescopic Approach and Its Interaction with Biomacromolecules. ACS COMBINATORIAL SCIENCE 2020; 22:630-640. [PMID: 32820896 DOI: 10.1021/acscombsci.0c00083] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
In this work, a one-pot, telescopic approach is described for the combinatorial library of thiazolidine-2-imines. The synthetic manipulation proceeds smoothly via the reaction of 2-aminopyridine/pyrazine/pyrimidine with substituted isothiocyanates followed by base catalyzed ring closure with 1,2-dibromoethane to obtain thiazolidine-2-imines with broad substrate scope and high functional group tolerance. The synthetic strategy merges well with the thiourea formation followed by base catalyzed ring closure reaction for the thiazolidine-2-imine synthesis in a more modular and straightforward approach. The synthetic procedure reported herein represents a cleaner route toward thiazolidine-2-imines as compared to traditional methodologies. Moreover, the biological significance of combinatorially synthesized thiazolidin-2-imines has been investigated for their use as possible inhibitors for acetyl cholinesterase through molecular docking studies.
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Affiliation(s)
- Ananya Anubhav Saikia
- Department of Chemistry, School of Advanced Sciences, Vellore Institute of Technology, Vellore-632014, India
| | - Ramdas Nishanth Rao
- Department of Chemistry, School of Advanced Sciences, Vellore Institute of Technology, Vellore-632014, India
| | - Barnali Maiti
- Department of Chemistry, School of Advanced Sciences, Vellore Institute of Technology, Vellore-632014, India
| | | | - Kaushik Chanda
- Department of Chemistry, School of Advanced Sciences, Vellore Institute of Technology, Vellore-632014, India
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Saikia AA, Nishanth Rao R, Das S, Jena S, Rej S, Maiti B, Chanda K. Sequencing [3+2]-cycloaddition and multicomponent reactions: A regioselective microwave-assisted synthesis of 1,4-disubstituted 1,2,3-triazoles using ionic liquid supported Cu(II) precatalysts in methanol. Tetrahedron Lett 2020. [DOI: 10.1016/j.tetlet.2020.152273] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
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Rao RN, Panchangam RL, Manickam V, Balamurali MM, Chanda K. Synthesis and Antitumor Activity Evaluation of Cyclometalated
2H‐
Indazole Ruthenium(II) and Iridium(III) Complexes. Chempluschem 2020; 85:1800-1812. [DOI: 10.1002/cplu.202000516] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2020] [Revised: 07/29/2020] [Indexed: 01/07/2023]
Affiliation(s)
- Ramdas Nishanth Rao
- Department of ChemistrySchool of Advanced ScienceVellore Institute of Technology Vellore 632014 India
| | - Rajeeva Lochana Panchangam
- Department of BiosciencesSchool of Biosciences and TechnologyVellore Institute of Technology Vellore 632014 India
| | - Venkatraman Manickam
- Department of BiosciencesSchool of Biosciences and TechnologyVellore Institute of Technology Vellore 632014 India
| | - Musuvathi Motilal Balamurali
- Chemistry DivisionSchool of Advanced SciencesVellore Institute of Technology Chennai Campus Chennai 600127 India
| | - Kaushik Chanda
- Department of ChemistrySchool of Advanced ScienceVellore Institute of Technology Vellore 632014 India
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10
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Kolade SO, Izunobi JU, Hosten EC, Olasupo IA, Ogunlaja AS, Familoni OB. Synthesis, crystal structure and docking studies of tetracyclic 10-iodo-1,2-dihydroisoquinolino[2,1-b][1,2,4]benzothiadiazine 12,12-dioxide and its precursors. Acta Crystallogr C Struct Chem 2020; 76:810-820. [PMID: 32756044 DOI: 10.1107/s2053229620009626] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2020] [Accepted: 07/15/2020] [Indexed: 11/10/2022] Open
Abstract
The title compound, 10-iodo-1,2-dihydroisoquinolino[2,1-b][1,2,4]benzothiadiazine 12,12-dioxide, C15H11IN2O2S (8), was synthesized via the metal-free intramolecular N-iodosuccinimide (NIS)-mediated radical oxidative sp3-C-H aminative cyclization of 2-(2'-aminobenzenesulfonyl)-1,3,4-trihydroisoquinoline, C15H16N2O2S (7). The amino adduct 7 was prepared via a two-step reaction, starting from the condensation of 2-nitrobenzenesulfonyl chloride (4) with 1,2,3,4-tetrahydroisoquinoline (5), to afford 2-(2'-nitrobenzenesulfonyl)-1,3,4-trihydroisoquinoline, C15H14N2O4S (6), in 82% yield. The catalytic hydrogenation of 6 with hydrogen gas, in the presence of 10% palladium-on-charcoal catalyst, furnished 7. Products 6-8 were characterized by their melting points, IR and NMR (1H and 13C) spectroscopy, and single-crystal X-ray diffraction. The three compounds crystallized in the monoclinic space group, with 7 exhibiting classical intramolecular hydrogen bonds of 2.16 and 2.26 Å. All three crystal structures exhibit centrosymmetric pairs of intermolecular C-H...π(ring) and/or π-π stacking interactions. The docking studies of molecules 6, 7 and 8 with deoxyribonucleic acid (PDB id: 1ZEW) revealed minor-groove binding behaviours without intercalation, with 7 presenting the most favourable global energy of the three molecules. Nonetheless, molecule 8 interacted strongly with the DNA macromolecule, with an attractive van der Waals energy of -15.53 kcal mol-1.
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Affiliation(s)
- Sherif O Kolade
- Chemistry, University of Lagos, Akoka-Yaba, Lagos 100001, Nigeria
| | | | - Eric C Hosten
- Chemistry, Nelson Mandela University, PO Box 77000, Port Elizabeth 6031, South Africa
| | - Idris A Olasupo
- Chemistry, University of Lagos, Akoka-Yaba, Lagos 100001, Nigeria
| | - Adeniyi S Ogunlaja
- Chemistry, Nelson Mandela University, PO Box 77000, Port Elizabeth 6031, South Africa
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Padmaja RD, Chanda K. A robust and recyclable ionic liquid-supported copper(II) catalyst for the synthesis of 5-substituted-1H-tetrazoles using microwave irradiation. RESEARCH ON CHEMICAL INTERMEDIATES 2019. [DOI: 10.1007/s11164-019-04035-4] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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