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Maikhuri VK, Verma V, Mathur D, Prasad AK, Khatri V. Synthesis of substituted 2H-Chromenes via Pd-catalyzed C-H activation and thermal cyclization. Carbohydr Res 2024; 536:109018. [PMID: 38185030 DOI: 10.1016/j.carres.2023.109018] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2023] [Revised: 12/18/2023] [Accepted: 12/19/2023] [Indexed: 01/09/2024]
Abstract
A proficient approach has been developed for the synthesis of substituted 2H-chromenes from C1-substituted glucal. The key step of our synthetic methodology was C-H activation in propylene carbonate solvent followed by 6π-electrocyclization aromatization in ethylene glycol as greener substitutes to toxic aprotic solvents, to obtain 2H-chromenes in a stepwise manner. The application of the developed methodology was further explored with the synthesis of a small library of substituted 2H-chromenes in good yields.
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Affiliation(s)
- Vipin K Maikhuri
- Bioorganic Laboratory, Department of Chemistry, University of Delhi, Delhi, 110007, India.
| | - Vineet Verma
- Bioorganic Laboratory, Department of Chemistry, University of Delhi, Delhi, 110007, India
| | - Divya Mathur
- Department of Chemistry, Daulat Ram College, University of Delhi, Delhi, 110007, India
| | - Ashok K Prasad
- Bioorganic Laboratory, Department of Chemistry, University of Delhi, Delhi, 110007, India
| | - Vinod Khatri
- Department of Chemistry, T. D. L. Govt. College for Women, Murthal, 131027, Haryana, India.
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Kumar S, Sahu RK, Kumari P, Maity J, Kumar B, Chhatwal RJ, Singh BK, Prasad AK. Efficient and stereoselective synthesis of sugar fused pyrano[3,2- c]pyranones as anticancer agents. RSC Adv 2023; 13:24604-24616. [PMID: 37601594 PMCID: PMC10436030 DOI: 10.1039/d3ra02371k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2023] [Accepted: 07/19/2023] [Indexed: 08/22/2023] Open
Abstract
A highly stereoselective, efficient and facile route was achieved for the synthesis of novel and biochemically potent sugar fused pyrano[3,2-c]pyranone derivatives starting from inexpensive, naturally occurring d-galactose and d-glucose. First, β-C-glycopyranosyl aldehydes were synthesized from these d-hexose sugars in six steps, with overall yields 41-55%. Next, two different 1-C-formyl glycals were synthesized from these β-C-glycopyranosyl aldehydes by treatment in basic conditions. The optimization of reaction conditions was carried out following reactions between 1-C-formyl galactal and 4-hydroxycoumarin. Next, 1-C-formyl galactal and 1-C-formyl glucal were treated with nine substituted 4-hydroxy coumarins at room temperature (25 °C) in ethyl acetate for ∼1-2 h in the presence of l-proline to obtain exclusively single diastereomers of pyrano[3,2-c]pyranone derivatives in excellent yields. Four compounds were found to be active for the MCF-7 cancer cell line. The MTT assay, apoptosis assay and migration analysis showed significant death of the cancer cells induced by the synthesized compounds.
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Affiliation(s)
- Sandeep Kumar
- Bioorganic Laboratory, Department of Chemistry, University of Delhi Delhi-110007 India
- Department of Chemistry, Ramjas College, University of Delhi Delhi-110007 India
| | - Ram Krishna Sahu
- National Institute of Cancer Prevention & Research Noida Uttar Pradesh India
| | - Priti Kumari
- Bioorganic Laboratory, Department of Chemistry, University of Delhi Delhi-110007 India
| | - Jyotirmoy Maity
- Department of Chemistry, St. Stephen College, University of Delhi Delhi-110007 India
| | - Binayak Kumar
- National Institute of Cancer Prevention & Research Noida Uttar Pradesh India
| | | | - Brajendra K Singh
- Bioorganic Laboratory, Department of Chemistry, University of Delhi Delhi-110007 India
| | - Ashok K Prasad
- Bioorganic Laboratory, Department of Chemistry, University of Delhi Delhi-110007 India
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Kumar S, Khatri V, Mangla P, Chhatwal RJ, Parmar VS, Prasad AK. C-Glycopyranosyl aldehydes: emerging chiral synthons in organic synthesis. RSC Adv 2023; 13:19898-19954. [PMID: 37404320 PMCID: PMC10316784 DOI: 10.1039/d3ra02122j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2023] [Accepted: 05/16/2023] [Indexed: 07/06/2023] Open
Abstract
Herein, we have summarized the vast array of synthetic processes that have been developed for the synthesis of C-glycopyranosyl aldehydes and diverse C-glycoconjugates derived from them by covering the literature reported from 1979 to 2023. Notwithstanding its challenging chemistry, C-glycosides are considered stable pharmacophores and are used as important bioactive molecules. The discussed synthetic methodologies to access C-glycopyranosyl aldehydes take advantage of seven key intermediates, viz. allene, thiazole, dithiane, cyanide, alkene, and nitromethane. Furthermore, the integration of complex C-glycoconjugates derived from varied C-glycopyranosyl aldehydes involves nucleophilic addition/substitution, reduction, condensation, oxidation, cyclo condensation, coupling, and Wittig reactions. In this review, we have categorized the synthesis of C-glycopyranosyl aldehydes and C-glycoconjugates on the basis of the methodology used for their synthesis and on types of C-glycoconjugates, respectively.
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Affiliation(s)
- Sandeep Kumar
- Bioorganic Laboratory, Department of Chemistry, University of Delhi Delhi India
| | - Vinod Khatri
- Bioorganic Laboratory, Department of Chemistry, University of Delhi Delhi India
- T. D. L. Govt College for Women Murthal-131027 Haryana India
| | - Priyanka Mangla
- Bioorganic Laboratory, Department of Chemistry, University of Delhi Delhi India
| | | | - Virinder S Parmar
- Bioorganic Laboratory, Department of Chemistry, University of Delhi Delhi India
- The City University of New York-Medgar Evers College, Department of Chemistry and Environmental Science USA
- Nanoscience Program, CUNY-Graduate Center and City College, Departments of Chemistry and Biochemistry USA
- Institute of Click Chemistry Research and Studies, Amity University Noida 201303 India
| | - Ashok K Prasad
- Bioorganic Laboratory, Department of Chemistry, University of Delhi Delhi India
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Kavita, Maikhuri VK, Singla H, Maity J, Prasad AK. A highly efficient and facile one pot synthesis of novel 1-glycopyranosyl-4-biaryl butenone derivatives. SYNTHETIC COMMUN 2023. [DOI: 10.1080/00397911.2023.2190461] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/05/2023]
Affiliation(s)
- Kavita
- Bioorganic Laboratory, Department of Chemistry, University of Delhi, Delhi, India
| | - Vipin K. Maikhuri
- Bioorganic Laboratory, Department of Chemistry, University of Delhi, Delhi, India
| | - Harbansh Singla
- Bioorganic Laboratory, Department of Chemistry, University of Delhi, Delhi, India
| | - Jyotirmoy Maity
- Department of Chemistry, St. Stephen’s College, University of Delhi, Delhi, India
| | - Ashok K. Prasad
- Bioorganic Laboratory, Department of Chemistry, University of Delhi, Delhi, India
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K Sharma V, Mangla P, K Singh S, K Prasad A. Triazole-linked nucleic acids: Synthesis, therapeutics and synthetic biology applications. Curr Org Synth 2023:COS-EPUB-131388. [PMID: 37138439 DOI: 10.2174/1570179420666230502123950] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2022] [Revised: 02/27/2023] [Accepted: 03/10/2023] [Indexed: 05/05/2023]
Abstract
This article covers the triazole-linked nucleic acids where the triazole linkage (TL) replaces the natural phosphate backbone. The replacement is done at either a few selected linkages or all the phosphate linkages. Two triazole linkages, the four-atom TL1 and the six-atom TL2, have been discussed in detail. These triazole-modified oligonucleotides have found a wide range of applications, from therapeutics to synthetic biology. For example, the triazole-linked oligonucleotides have been used in the antisense oligonucleotide (ASO), small interfering RNA (siRNA) and clustered regularly interspaced short palindromic repeats (CRISPR)-Cas9 technology as therapeutic agents. Due to the ease of the synthesis and a wide range of biocompatibility, the triazole linkage TL2 has been used to assemble a functional 300-mer DNA from alkyne- and azide-functionalized 100-mer oligonucleotides as well as an epigenetically modified variant of a 335 base-pair gene from ten short oligonucleotides. These outcomes highlight the potential of triazole-linked nucleic acids and open the doors for other TL designs and artificial backbones to fully exploit the vast potential of artificial nucleic acids in therapeutics, synthetic biology and biotechnology.
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Affiliation(s)
- Vivek K Sharma
- Department of Medicine, University of Massachusetts Chan Medical School, Mattapan, MA 02126, USA
- MassBiologics of the University of Massachusetts Chan Medical School, Mattapan, MA 02126, USA
| | - Priyanka Mangla
- Oligonucleotide Discovery, Discovery Sciences, BioPharmaceuticals R&D, AstraZeneca, Gothenburg, Sweden
| | - Sunil K Singh
- Department of Chemistry, Kirori Mal College, University of Delhi, Delhi 110 007, India
| | - Ashok K Prasad
- Bioorganic Laboratory, Department of Chemistry, University of Delhi, Delhi 110 007, India
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Singla H, Kumar S, Maity J, Prasad AK. Chemoenzymatic synthesis of bridged homolyxofuranosyl pyrimidine nucleosides: Bicyclic AZT analogues. Carbohydr Res 2023; 527:108813. [PMID: 37062106 DOI: 10.1016/j.carres.2023.108813] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2023] [Revised: 03/29/2023] [Accepted: 04/11/2023] [Indexed: 04/18/2023]
Abstract
A greener chemo-enzymatic methodology has been developed for the synthesis of conformationally restricted diastereomeric homolyxofuranosyl pyrimidines (AZT analogue), i.e., (5'R)-3'-azido-3'-deoxy-2'-O,5'-C-bridged-β-d-homolyxofuranosyl-uracil and thymine starting from inexpensive diacetone-d-glucofuranose in 18% and 21% overall yields, respectively. In one of the key steps in multistep synthesis of bicyclic AZT analogues, the primary hydroxyl group of 3'-azido-3'-deoxy-β-d-glucofuranosyl pyrimidines has been acetylated using Novozyme® 435 in THF in 92% and 97% yields, respectively. The monoacetylated nucleoside was converted to desired bicyclic AZT analogue in two steps in an overall yield of 82% and 83%, respectively.
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Affiliation(s)
- Harbansh Singla
- Bioorganic Laboratory, Department of Chemistry, University of Delhi, Delhi, 110 007, India
| | - Sandeep Kumar
- Bioorganic Laboratory, Department of Chemistry, University of Delhi, Delhi, 110 007, India
| | - Jyotirmoy Maity
- Department of Chemistry, St. Stephen's College, University of Delhi, Delhi, 110 007, India
| | - Ashok K Prasad
- Bioorganic Laboratory, Department of Chemistry, University of Delhi, Delhi, 110 007, India.
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Verma V, Singh A, Tyagi P, Kumar V, Prasad AK. Synthesis of 1,2,3‐Triazole‐Linked Hexopyranosylpyrimidine Nucleosides and Their Application as Hepatitis B Viral DNA, HBsAg and HBeAg Suppressants. ChemistrySelect 2023. [DOI: 10.1002/slct.202204982] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/30/2023]
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Maikhuri VK, Verma V, Mathur D, Prasad AK, Chaudhary A, Kumar R. Sugars in Multicomponent Reactions: A Toolbox for Diversity-Oriented Synthesis. SYNTHESIS-STUTTGART 2023. [DOI: 10.1055/s-0042-1751418] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/06/2023]
Abstract
AbstractMulticomponent reactions (MCRs) cover strategically employed chemical transformations that incorporate three or more reactants in one pot leading to a functionalized final product. Thus, it is an ideal tool to achieve high levels of complexity, diversity, yields of desired products, atom economy, and reduced reaction times. Sugars belong to the class of naturally occurring compounds with fascinating applications in the field of drug discovery due to the presence of various hydroxy groups and well-defined stereochemistry. However, their potential in MCRs has been realized only recently. This account describes recent advances in the synthesis of sugar-derived heterocycles synthesized by MCRs. We hope to encourage the synthetic and medicinal chemistry community to apply this powerful MCR chemistry to generate novel glycoconjugate challenges.1 Introduction2 Synthesis of Various Functionalized Sugar Compounds2.1 Passerini and Ugi Multicomponent Reactions2.2 Petasis Reaction2.3 Hantzsch Reaction2.4 Domino Ferrier–Povarov Reaction2.5 Marckwald Reaction2.6 Groebke–Blackburn–Bienaymé (GBB) Reaction2.7 Prins–Ritter Reaction2.8 Debus–Radziszewski Imidazole Synthesis Reaction2.9 Mannich Reaction2.10 A3-Coupling Reaction2.11 [3+2]-Cycloaddition Reactions2.12 Miscellaneous Reactions3 Conclusion
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Affiliation(s)
| | - Vineet Verma
- Bioorganic Laboratory, Department of Chemistry, University of Delhi
- Department of Chemistry, Starex University
| | - Divya Mathur
- Bioorganic Laboratory, Department of Chemistry, University of Delhi
- Daulat Ram College, Department of Chemistry, University of Delhi
| | - Ashok K. Prasad
- Bioorganic Laboratory, Department of Chemistry, University of Delhi
| | | | - Rajesh Kumar
- Department of Chemistry, R.D.S. College, B.R.A. Bihar University
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Kumar S, Chhatwal RJ, Maity J, Senapati NN, Prasad AK. Fujiwara‐Moritani Assisted Synthesis of Conjugated 2,3‐Dihydrofuran Trienes and Corresponding 2,3‐Dihydrobenzofuran Derivative. ChemistrySelect 2023. [DOI: 10.1002/slct.202204064] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Affiliation(s)
- Sandeep Kumar
- Department of Chemistry University of Delhi Delhi 110007 India
| | | | - Jyotirmoy Maity
- Department of Chemistry St. Stephen's College University of Delhi – 110007 India
| | | | - Ashok K. Prasad
- Department of Chemistry University of Delhi Delhi 110007 India
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Singla H, Kumar S, Maikhuri VK, Kavita K, Prasad AK. Synthesis and Photophysical Studies on
N
1
‐(Coumarin‐4′′′‐yl)‐
C
4
‐(2′,3′‐dideoxyuridin‐3′‐yl/3′‐deoxythymidin‐3′‐yl)‐oxymethyl‐1,2,3‐triazoles. ChemistrySelect 2023. [DOI: 10.1002/slct.202203412] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Affiliation(s)
- Harbansh Singla
- Department of Chemistry University of Delhi Delhi 110007 India
| | - Sandeep Kumar
- Department of Chemistry University of Delhi Delhi 110007 India
| | | | - Kavita Kavita
- Department of Chemistry University of Delhi Delhi 110007 India
| | - Ashok K. Prasad
- Department of Chemistry University of Delhi Delhi 110007 India
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Khatri V, Parshad B, Prasad AK, Bhatia S. Designs, synthesis, and biomedical applications of glycotripods for targeting trimeric lectins. European J Org Chem 2023. [DOI: 10.1002/ejoc.202201360] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Affiliation(s)
- Vinod Khatri
- Freie Universität Berlin: Freie Universitat Berlin Department of Chemistry INDIA
| | - Badri Parshad
- Wellman Center for Photomedicine Harvard Medical school UNITED STATES
| | - Ashok K. Prasad
- University of Delhi Faculty of Science Department of Chemistry INDIA
| | - Sumati Bhatia
- Freie Universität Berlin Instititute of Chemistry and Biochemistry, Department of Biochemistry, Chemistry 14195 Berlin GERMANY
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Maikhuri VK, Maity J, Srivastava S, Prasad AK. Transition metal-catalyzed double C vinyl-H bond activation: synthesis of conjugated dienes. Org Biomol Chem 2022; 20:9522-9588. [PMID: 36412483 DOI: 10.1039/d2ob01646j] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Conjugated dienes have occupied a pivotal position in the field of synthetic organic chemistry and medicinal chemistry. They act as important synthons for the synthesis of various biologically important molecules and therefore, gain tremendous attention worldwide. A wide range of synthetic routes to access these versatile molecules have been developed in the past decades. Transition metal-catalyzed cross-dehydrogenative coupling (CDC) has emerged as one of the utmost front-line research areas in current synthetic organic chemistry due to its high atom economy, efficiency, and viability. In this review, an up-to-date summary including scope, limitations, mechanistic studies, stereoselectivities, and synthetic applications of transition metal-catalyzed double Cvinyl-H bond activation for the synthesis of conjugated dienes has been reported since 2013. The literature reports mentioned in this review have been classified into three different categories, i.e. (a) Cvinyl-Cvinyl bond formation via oxidative homo-coupling of terminal alkenes; (b) Cvinyl-Cvinyl bond formation via non-directed oxidative cross-coupling of linear/cyclic alkenes and terminal/internal alkenes, and (c) Cvinyl-Cvinyl bond formation via oxidative cross-coupling of directing group bearing alkenes and terminal/internal alkenes. Overall, this review aims to provide a concise overview of the current status of the considerable development in this field and is expected to stimulate further innovation and research in the future.
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Affiliation(s)
- Vipin K Maikhuri
- Bioorganic Laboratory, Department of Chemistry, University of Delhi, Delhi-110007, India.
| | - Jyotirmoy Maity
- Department of Chemistry, St. Stephen's College, University of Delhi, Delhi-110007, India
| | - Smriti Srivastava
- Department of Chemistry, Acadia University, Wolfville, NS, B4P 2R6, Canada
| | - Ashok K Prasad
- Bioorganic Laboratory, Department of Chemistry, University of Delhi, Delhi-110007, India.
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Kumar S, Kumar S, Arora A, Prasad AK, Maity J. 5‐Formyluridine and Its Synthetic Applications. ChemistrySelect 2022. [DOI: 10.1002/slct.202203432] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/04/2022]
Affiliation(s)
- Sandeep Kumar
- Bioorganic Laboratory Department of Chemistry University of Delhi Delhi India
| | - Sumit Kumar
- Bioorganic Laboratory Department of Chemistry University of Delhi Delhi India
| | - Aditi Arora
- Bioorganic Laboratory Department of Chemistry University of Delhi Delhi India
| | - Ashok K. Prasad
- Bioorganic Laboratory Department of Chemistry University of Delhi Delhi India
| | - Jyotirmoy Maity
- Department of Chemistry St. Stephen's College University of Delhi Delhi India
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Venkateswaran K, Shrivastava A, Agrawala PK, Prasad AK, Manda K, Parmar VS, Dwarakanath BS. Immune-modulation by 7, 8-diacetoxy-4-methylthiocoumarin in total body-irradiated mice: Implications for the mitigation of radiation-induced hematopoietic injury. Life Sci 2022; 311:121140. [DOI: 10.1016/j.lfs.2022.121140] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2022] [Revised: 10/19/2022] [Accepted: 10/27/2022] [Indexed: 11/06/2022]
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Goswami A, Prasad AK, Maity J, Khaneja N. Synthesis and applications of bicyclic sugar modified locked nucleic acids: A review. Nucleosides Nucleotides Nucleic Acids 2022; 41:503-529. [PMID: 35319343 DOI: 10.1080/15257770.2022.2052316] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/25/2021] [Revised: 03/01/2022] [Accepted: 03/08/2022] [Indexed: 06/14/2023]
Abstract
A large number of Locked Nucleic Acids (LNAs) with variety of modifications and restricted conformations have been developed in the last few decades. These modifications have significantly improved the biological properties of oligonucleotides, when LNAs moieties were incorporated into them. Herein, the synthesis and applications of these modified locked nucleic acids as antisense oligonucleotides are discussed.Supplemental data for this article is available online at https://doi.org/10.1080/15257770.2022.2052316 .
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Affiliation(s)
- Arkaja Goswami
- Department of Chemistry, Shyam Lal College, University of Delhi, Delhi, India
| | - Ashok K Prasad
- Bioorganic Laboratory, Department of Chemistry, University of Delhi, Delhi, India
| | - Jyotirmoy Maity
- Department of Chemistry, St. Stephen's College, University of Delhi, Delhi, India
| | - Neerja Khaneja
- Department of Chemistry, Shyam Lal College, University of Delhi, Delhi, India
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Kumar R, Maity J, Mathur D, Verma A, Rana N, Kumar M, Kumar S, Prasad AK. Green synthesis of triazolo-nucleoside conjugates via azide–alkyne C–N bond formation. Physical Sciences Reviews 2022. [DOI: 10.1515/psr-2021-0090] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
Modified nucleosides are the core precursors for the synthesis of artificial nucleic acids, and are important in the field of synthetic and medicinal chemistry. In order to synthesize various triazolo-compounds, copper and ruthenium catalysed azide–alkyne 1,3-dipolar cycloaddition reactions also known as click reaction have emerged as a facile and efficient tool due to its simplicity and convenient conditions. Introduction of a triazole ring in nucleosides enhances their therapeutic value and various photophysical properties. This review primarily focuses on the plethora of synthetic methodologies being employed to synthesize sugar modified triazolyl nucleosides, their therapeutic importance and various other applications.
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Affiliation(s)
- Rajesh Kumar
- Department of Chemistry , R.D.S. College, B.R.A. Bihar University , Muzaffarpur , India
| | - Jyotirmoy Maity
- Department of Chemistry , St. Stephen’s College, University of Delhi , Delhi , India
| | - Divya Mathur
- Department of Chemistry , Daulat Ram College, University of Delhi , Delhi , India
| | - Abhishek Verma
- Department of Chemistry , Bioorganic Laboratory, University of Delhi , Delhi , India
| | - Neha Rana
- Department of Chemistry , Bioorganic Laboratory, University of Delhi , Delhi , India
| | - Manish Kumar
- Department of Chemistry , Bioorganic Laboratory, University of Delhi , Delhi , India
| | - Sandeep Kumar
- Department of Chemistry , Bioorganic Laboratory, University of Delhi , Delhi , India
| | - Ashok K. Prasad
- Department of Chemistry , Bioorganic Laboratory, University of Delhi , Delhi , India
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Kumar S, Maity J, Kumar B, Kumar S, Prasad AK. Chemical and chemoenzymatic routes to bridged homoarabinofuranosylpyrimidines: Bicyclic AZT analogues. Beilstein J Org Chem 2022; 18:95-101. [PMID: 35096178 PMCID: PMC8767562 DOI: 10.3762/bjoc.18.10] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2021] [Accepted: 12/28/2021] [Indexed: 11/23/2022] Open
Abstract
Conformationally restricted diastereomeric homoarabinofuranosylpyrimidines (AZT analogue), i.e., (5′R)-3′-azido-3′-deoxy-2′-O,5′-C-bridged-β-ᴅ-homoarabinofuranosylthymine and -uracil had been synthesized starting from diacetone ᴅ-glucofuranose following chemoenzymatic and chemical routes in 34–35% and 24–25% overall yields, respectively. The quantitative and diastereoselective acetylation of primary hydroxy over two secondary hydroxy groups present in the key nucleoside precursor was mediated with Lipozyme® TL IM in 2-methyltetrahydrofuran following a chemoenzymatic pathway. Whereas, the protection of the primary hydroxy over the lone secondary hydroxy group in the key azido sugar precursor was achieved using bulky tert-butyldiphenylsilyl chloride (TBDPS-Cl) in pyridine in 92% yield following a chemical synthetic pathway. The chemoenzymatic method was found to be superior over the chemical method in respect of the number of synthetic steps and overall yield of the final product.
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Affiliation(s)
- Sandeep Kumar
- Bioorganic Laboratory, Department of Chemistry, University of Delhi, Delhi- 110 007, India
| | - Jyotirmoy Maity
- Department of Chemistry, St. Stephen’s College, University of Delhi, Delhi- 110 007, India
| | - Banty Kumar
- Bioorganic Laboratory, Department of Chemistry, University of Delhi, Delhi- 110 007, India
- Department of Chemistry, Rajdhani College, University of Delhi, Delhi- 110 015, India
| | - Sumit Kumar
- Bioorganic Laboratory, Department of Chemistry, University of Delhi, Delhi- 110 007, India
| | - Ashok K Prasad
- Bioorganic Laboratory, Department of Chemistry, University of Delhi, Delhi- 110 007, India
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Abstract
Trifluoromethylated nucleosides, such as trifluridine, have widespread applications in pharmaceuticals as anticancer and antiviral agents. However, site-selective addition of a trifluoromethyl group onto a nucleobase typically requires either inconvenient multi-step synthesis or expensive trifluoromethylation reagents, or results in low yield. This article describes a simple, scalable, and high-yielding protocol for late-stage direct trifluoromethylation of pyrimidine nucleosides via a microwave-irradiated pathway. First, 5-iodo pyrimidine nucleosides undergo complete benzoylation to obtain N3 -benzoyl-3',5'-di-O-benzoyl-5-iodo-pyrimidine nucleosides as key precursors. Next, trifluoromethylation is carried out under both conventional and microwave heating using an inexpensive and commercially accessible Chen's reagent, i.e., methyl fluorosulfonyldifluoroacetate, to produce N3 -benzoyl-3',5'-di-Obenzoyl-5-trifluoromethyl-pyrimidine nucleosides. The microwave-assisted transformation accentuates its simplicity, mild reaction conditions, and dominance, providing a facile route to access trifluoromethylation. Finally, the envisioned 5-trifluoromethyl pyrimidine nucleosides are obtained by a routine debenzoylation procedure. This concludes a convenient three-step synthesis to obtain trifluridine and its 2'-modified analogs on a gram scale with consistently high yields, starting from their respective iodo-precursors, and requires only one chromatographic purification at the trifluoromethylation step. Furthermore, this operationally simple protocol can be utilized as a definitive methodology to produce various other trifluoromethylated therapeutics. © 2021 Wiley Periodicals LLC. Basic Protocol: Synthesis of 5-trifluoromethyl pyrimidine nucleosides 4a-c Alternate Protocol: Conventional trifluoromethylation: Synthesis of N3-benzoyl-3',5'-di-O-benzoyl-5-trifluoromethyl pyrimidine nucleosides (3a-c).
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Affiliation(s)
- Priyanka Mangla
- Bioorganic Laboratory, Department of Chemistry, University of Delhi, Delhi, India
| | | | - Ashok K Prasad
- Bioorganic Laboratory, Department of Chemistry, University of Delhi, Delhi, India
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Verma A, Gahlyan P, Bawa R, Dash SR, Prasad AK, Kumar R. Glycerol‐Triazole Conjugated Rhodamine as Colorimetric and Fluorimetric Sensor for Cu
2+. ChemistrySelect 2021. [DOI: 10.1002/slct.202102145] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Abhishek Verma
- Bioorganic Laboratory Department of Chemistry University of Delhi Delhi 110007 India
| | - Parveen Gahlyan
- Bioorganic Laboratory Department of Chemistry University of Delhi Delhi 110007 India
| | - Rashim Bawa
- Bioorganic Laboratory Department of Chemistry University of Delhi Delhi 110007 India
| | - Soumya Ranjan Dash
- Physical and Material Chemistry Division CSIR-NCL Pune Dr. Homi Bhaba Road Pune 411008 India
| | - Ashok K. Prasad
- Bioorganic Laboratory Department of Chemistry University of Delhi Delhi 110007 India
| | - Rakesh Kumar
- Bioorganic Laboratory Department of Chemistry University of Delhi Delhi 110007 India
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21
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Verma A, Arora A, Bhatt AN, Arya MB, Prasad AK, Parmar VS, Dwarakanath BS. Radiosensitization of calreticulin-overexpressing human glioma cell line by the polyphenolic acetate 7, 8-diacetoxy-4-methylcoumarin. Cancer Rep (Hoboken) 2021; 5:e1326. [PMID: 34472223 PMCID: PMC9780425 DOI: 10.1002/cnr2.1326] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2020] [Revised: 10/17/2020] [Accepted: 11/16/2020] [Indexed: 01/25/2023] Open
Abstract
BACKGROUND Calreticulin (CRT), an endoplasmic reticulum-resident protein generally overexpressed in cancer cells, is associated with radiation resistance. CRT shows higher transacetylase activity, as shown by us earlier, in the presence of the polyphenolic acetates (like 7, 8-diacetoxy-4-methylcoumarin, DAMC) and modifies the activity of a number of proteins, thereby influencing cell signaling. AIM To investigate the relationship between CRT expression and radiation response in a human glioma cell line and to evaluate the radiomodifying effects of DAMC. METHODS AND RESULTS Studies were carried out in an established human glioma cell line (BMG-1) and its isogenic clone overexpressing CRT (CROE, CRT-overexpressing cells) by analyzing clonogenic survival, cell proliferation, micronuclei analysis, and protein levels by Western blotting as parameters of responses. CRT overexpression conferred resistance against radiation-induced cell death in CROE cells (D37 = 7.35 Gy, D10 = 12.6 Gy and D0 = 7.25 Gy) as compared to BMG-1 cells (D37 = 5.70 Gy, D10 = 9.2 Gy and D0 = 5.6 Gy). A lower level of radiation-induced micronuclei formation observed in CROE cells suggested that reduced induction and/or enhanced DNA repair partly contributed to the enhanced radioresistance. Consistent with this suggestion, we noted that CRT-mediated radioresistance was coupled with enhanced grp78 level and reduced P53 activation-mediated prodeath signaling, while no changes were noted in acetylation of histone H4. DAMC-enhanced radiation-induced delayed (secondary) apoptosis, which was higher in CROE cells. CONCLUSION CRT overexpression confers resistance against radiation-induced death of human glioma cells, which can be overcome by the polyphenolic acetate DAMC.
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Affiliation(s)
- Amit Verma
- Institute of Nuclear Medicine and Allied Sciences, Brig. S. K. Majumdar MargDelhiIndia,Present address:
PACT & Health LLC, BranfordConnecticut, 06405‐2546USA
| | - Aastha Arora
- Institute of Nuclear Medicine and Allied Sciences, Brig. S. K. Majumdar MargDelhiIndia
| | - Anant N Bhatt
- Institute of Nuclear Medicine and Allied Sciences, Brig. S. K. Majumdar MargDelhiIndia
| | | | - Ashok K Prasad
- Bioorganic Laboratory, Department of ChemistryUniversity of DelhiDelhiIndia
| | - Virinder S Parmar
- Bioorganic Laboratory, Department of ChemistryUniversity of DelhiDelhiIndia,Department of Chemistry and Environmental ScienceMedgar Evers College, The City University of New YorkBrooklynNew York
| | - Bilikere S Dwarakanath
- Institute of Nuclear Medicine and Allied Sciences, Brig. S. K. Majumdar MargDelhiIndia,Central Research FacilitySri Ramachandra Institute of Higher Education and ResearchChennaiIndia
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22
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Kumar A, Kaushik P, Incerpi S, Pedersen JZ, Goel S, Prasad AK, Rohil V, Parmar VS, Saso L, Len C. Evaluation of the Free Radical Scavenging Activities of Ellagic Acid and Ellagic Acid Peracetate by EPR Spectrometry. Molecules 2021; 26:molecules26164800. [PMID: 34443388 PMCID: PMC8399592 DOI: 10.3390/molecules26164800] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2021] [Revised: 07/25/2021] [Accepted: 08/04/2021] [Indexed: 11/16/2022] Open
Abstract
The purpose of this study was to examine the free radical scavenging and antioxidant activities of ellagic acid (EA) and ellagic acid peracetate (EAPA) by measuring their reactions with the radicals, 2,2-diphenyl-1-picrylhydrazyl and galvinoxyl using EPR spectroscopy. We have also evaluated the influence of EA and EAPA on the ROS production in L-6 myoblasts and rat liver microsomal lipid peroxidation catalyzed by NADPH. The results obtained clearly indicated that EA has tremendous ability to scavenge free radicals, even at concentration of 1 µM. Interestingly even in the absence of esterase, EAPA, the acetylated product of EA, was also found to be a good scavenger but at a relatively slower rate. Kinetic studies revealed that both EA and EAPA have ability to scavenge free radicals at the concentrations of 1 µM over extended periods of time. In cellular systems, EA and EAPA were found to have similar potentials for the inhibition of ROS production in L-6 myoblasts and NADPH-dependent catalyzed microsomal lipid peroxidation.
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Affiliation(s)
- Ajit Kumar
- Department of Chemistry, SRM University, Delhi-NCR, Haryana, 39, RGEC, Sonepat 131 029, India; (A.K.); (P.K.)
- Department of Biochemistry, V. P. Chest Institute, University of Delhi, Delhi 110 007, India; (S.G.); (V.R.)
| | - Preeti Kaushik
- Department of Chemistry, SRM University, Delhi-NCR, Haryana, 39, RGEC, Sonepat 131 029, India; (A.K.); (P.K.)
| | - Sandra Incerpi
- Department of Sciences, University of Rome “Roma Tre”, 00146 Rome, Italy;
| | - Jens Z. Pedersen
- Department of Biology, University of Rome “Tor Vergata”, Via della Ricerca, Scientifica 1, 00133 Rome, Italy;
| | - Sanjay Goel
- Department of Biochemistry, V. P. Chest Institute, University of Delhi, Delhi 110 007, India; (S.G.); (V.R.)
| | - Ashok K. Prasad
- Bioorganic Laboratory, Department of Chemistry, University of Delhi, Delhi 110 007, India; (A.K.P.); (V.S.P.)
| | - Vishwajeet Rohil
- Department of Biochemistry, V. P. Chest Institute, University of Delhi, Delhi 110 007, India; (S.G.); (V.R.)
| | - Virinder S. Parmar
- Bioorganic Laboratory, Department of Chemistry, University of Delhi, Delhi 110 007, India; (A.K.P.); (V.S.P.)
- Department of Chemistry and Environmental Science, Medgar Evers College, The City University of New York, 1638 Bedford Avenue, Brooklyn, NY 11225, USA
| | - Luciano Saso
- Department of Physiology and Pharmacology “Vittorio Erspamer”, Sapienza University, P. le. Aldo Moro 5, 00185 Rome, Italy;
| | - Christophe Len
- Institute of Chemistry for Life and Health Sciences, Chimie ParisTech, PSL Research University, CNRS, UMR8060, 11 rue Pierre et Marie Curie, F-75005 Paris, France
- Correspondence:
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23
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Verma V, Maity J, Maikhuri VK, Sharma R, Ganguly HK, Prasad AK. Double-headed nucleosides: Synthesis and applications. Beilstein J Org Chem 2021; 17:1392-1439. [PMID: 34194579 PMCID: PMC8204177 DOI: 10.3762/bjoc.17.98] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2021] [Accepted: 05/27/2021] [Indexed: 12/19/2022] Open
Abstract
Double-headed nucleoside monomers have immense applications for studying secondary nucleic acid structures. They are also well-known as antimicrobial agents. This review article accounts for the synthetic methodologies and the biological applications of double-headed nucleosides.
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Affiliation(s)
- Vineet Verma
- Bioorganic Laboratory, Department of Chemistry, University of Delhi, Delhi-110 007, India
| | - Jyotirmoy Maity
- Department of Chemistry, St. Stephen’s College, University of Delhi, Delhi-110 007, India
| | - Vipin K Maikhuri
- Bioorganic Laboratory, Department of Chemistry, University of Delhi, Delhi-110 007, India
| | - Ritika Sharma
- Bioorganic Laboratory, Department of Chemistry, University of Delhi, Delhi-110 007, India
| | - Himal K Ganguly
- Department of Biophysics, Bose Institute, P1/12 CIT Scheme VIIM, Kolkata-700 054, India
| | - Ashok K Prasad
- Bioorganic Laboratory, Department of Chemistry, University of Delhi, Delhi-110 007, India
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24
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Shankar B, Khatri V, Kumar B, Maikhuri VK, Kumar A, Tomar R, Prasad AK. Synthesis and Structural Characterization of 1-( E-1-Arylpropenon-3-yl)-3,4,6-tri- O-benzyl-d-glucals and Their Transformation into Pentasubstituted (2 R,3 S,4 R)-Chromanes via Pd-Catalyzed Cross Dehydrogenative Coupling Reaction. ACS Omega 2021; 6:11248-11259. [PMID: 34056280 PMCID: PMC8153922 DOI: 10.1021/acsomega.1c00103] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/07/2021] [Accepted: 04/06/2021] [Indexed: 06/12/2023]
Abstract
We have developed an efficient methodology for the synthesis of (2R,3S,4R)-2-hydroxymethyl-3,4-dihydroxy-6-aryl-7-aroylchromanes in which the chirality at the C-2, C-3, and C-4 positions is being drawn from C-glucopyranosyl aldehyde, which in turn can be efficiently synthesized from d-glucose. Thus, the synthesis starts with the transformation of sugar aldehyde into 1-(E-1-arylpropenon-3-yl)-3,4,6-tri-O-benzyl-d-glucals using Claisen-Schmidt type condensation reaction with different acetophenones and then to 1,2-disubstituted glucals via Pd(II)-catalyzed cross dehydrogenative coupling reaction, which in turn has been efficiently converted into (2R,3S,4R)-chromanes via 6π-electrocyclization and in situ dehydrogenative aromatization.
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Affiliation(s)
- Bhawani Shankar
- Bioorganic
Laboratory, Department of Chemistry, University
of Delhi, Delhi 110007, India
- Department
of Chemistry, Deshbandhu College, University
of Delhi, Delhi 110019, India
| | - Vinod Khatri
- Bioorganic
Laboratory, Department of Chemistry, University
of Delhi, Delhi 110007, India
| | - Banty Kumar
- Bioorganic
Laboratory, Department of Chemistry, University
of Delhi, Delhi 110007, India
| | - Vipin K. Maikhuri
- Bioorganic
Laboratory, Department of Chemistry, University
of Delhi, Delhi 110007, India
| | - Amit Kumar
- Bioorganic
Laboratory, Department of Chemistry, University
of Delhi, Delhi 110007, India
| | - Rashmi Tomar
- Bioorganic
Laboratory, Department of Chemistry, University
of Delhi, Delhi 110007, India
| | - Ashok K. Prasad
- Bioorganic
Laboratory, Department of Chemistry, University
of Delhi, Delhi 110007, India
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25
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Joshi R, Singh P, Sharma NK, Ponnan P, Saluja D, Gambhir JK, Rawat DS, Parmar VS, Dwarakanath BS, Prasad AK, Raj HG. Site-directed mutagenesis in the P-domain of calreticulin transacylase identifies Lys-207 as the active site residue. 3 Biotech 2021; 11:113. [PMID: 33585151 DOI: 10.1007/s13205-021-02659-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2020] [Accepted: 01/13/2021] [Indexed: 10/22/2022] Open
Abstract
In silico-docking studies from previous work have suggested that Lys-206 and lys-207 of calreticulin (CR) play a pivotal key role in its well-established transacetylation activity. To experimentally validate this prediction, we introduced three mutations at lysine residues of P-domain of CR: K → A, P mut-1 (K -206, -209), P mut-2 (K -206, -207) and P mut-3 (K -207, -209) and analyzed their immunoreactivity and acetylation potential. The clones of wild-type P-domain (P wt ) and three mutated P-domain (P mut-1, P mut-2 and P mut-3) were expressed in pTrcHis C vector and the recombinant P wt , P mut-1 , P mut-2 and P mut-3 proteins were purified by Ni-NTA affinity chromatography. Screening of the transacylase activity (TAase) by the Glutathione S Transferase (GST) assay revealed that the TAase activity was associated with the P wt and P mut-1 while P mut-2 and P mut-3 did not show any activity. The immune-reactivity to anti-lysine antibody was also retained only by the P mut-1 in which the Lys-207 was intact. Retention of the TAase activity and immunoreactivity of P mut-1 with mutations introduced at Lys-206, Lys-209, while its loss with a mutation at Lys-207 residue indicated that lysine-207 of P-domain constitutes the active site residue controlling TAase activity. SUPPLEMENTARY INFORMATION The online version contains supplementary material available at 10.1007/s13205-021-02659-1.
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26
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Singh A, Malhotra S, Bimal D, Bouchet LM, Wedepohl S, Calderón M, Prasad AK. Synthesis, Self-Assembly, and Biological Activities of Pyrimidine-Based Cationic Amphiphiles. ACS Omega 2021; 6:103-112. [PMID: 33458463 PMCID: PMC7807463 DOI: 10.1021/acsomega.0c03623] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/29/2020] [Accepted: 10/12/2020] [Indexed: 05/08/2023]
Abstract
Pyrimidine-based cationic amphiphiles (PCAms), i.e., di-trifluoroacetic acid salts of N1-[1'-(1″,3″-diglycinatoxy-propane-2″-yl)-1',2',3'-triazole-4'-yl]methyl-N3-alkylpyrimidines have been synthesized utilizing naturally occurring biocompatible precursors, like glycerol, glycine, and uracil/ thymine in good yields. Synthesized PCAms consist of a hydrophilic head group comprising TFA salt of glyceryl 1,3-diglycinate and hydrophobic tail comprising of C-7 and C-12 N3-alkylated uracil or thymine conjugated via a 4-methylene-1,2,3-triazolyl linker. The physicochemical properties of all PCAms, such as critical aggregation concentration, hydrodynamic diameter, shape, and zeta potential (surface charge) were analyzed. These PCAms were also evaluated for their anti-proliferative and anti-tubercular activities. One of the synthesized PCAm exhibited 4- to 75-fold more activity than first-line anti-tubercular drugs streptomycin and isoniazid, respectively, against the multidrug resistant clinical isolate 591 of Mycobacterium tuberculosis.
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Affiliation(s)
- Ankita Singh
- Bioorganic
Laboratory, Department of Chemistry, University
of Delhi, Delhi 110007, India
| | - Shashwat Malhotra
- Bioorganic
Laboratory, Department of Chemistry, University
of Delhi, Delhi 110007, India
- Kirori
Mal College, Department of Chemistry, University
of Delhi, Delhi 110007, India
| | - Devla Bimal
- Bioorganic
Laboratory, Department of Chemistry, University
of Delhi, Delhi 110007, India
| | - Lydia M. Bouchet
- Freie
Universität Berlin, Institute of
Chemistry and Biochemistry, Berlin 14195, Germany
| | - Stefanie Wedepohl
- Freie
Universität Berlin, Institute of
Chemistry and Biochemistry, Berlin 14195, Germany
| | - Marcelo Calderón
- POLYMAT
and Applied Chemistry Department, Faculty of Chemistry, University of the Basque Country UPV/EHU, Paseo Manuel de Lardizabal 3, Donostia-San Sebastián 20018, Spain
- IKERBASQUE,
Basque Foundation for Science, Bilbao 48013, Spain
| | - Ashok K Prasad
- Bioorganic
Laboratory, Department of Chemistry, University
of Delhi, Delhi 110007, India
- . Tel. +91-11-27662486
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Kumar B, Maity J, Shankar B, Kumar S, Kavita, Prasad AK. Synthesis of d-glycopyranosyl depsipeptides using Passerini reaction. Carbohydr Res 2021; 500:108236. [PMID: 33516073 DOI: 10.1016/j.carres.2021.108236] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2020] [Revised: 12/31/2020] [Accepted: 01/04/2021] [Indexed: 11/16/2022]
Abstract
A protocol based on Passerini multi-component reaction has been developed for facile, efficient and atom economical synthesis of a small library of twenty potential bioactive (2R)-2-(d-glycopyranosyl)-2-acyloxyacetamides using perbenzylated d-glycopyranosyl aldehydes, substituted isocyanides and different aliphatic/aromatic carboxylic acids. All twenty synthesized d-glycopyranosyl α-acyloxy amides, commonly known as depsipeptides were unambiguously identified on the basis of their spectral (IR, 1H, 13C NMR, COSY, HSQC, NOESY and HRMS) data analysis.
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Affiliation(s)
- Banty Kumar
- Bioorganic Laboratory, Department of Chemistry, University of Delhi, Delhi, 110007, India; Department of Chemistry, Rajdhani College, University of Delhi, Delhi, 110015, India
| | - Jyotirmoy Maity
- Department of Chemistry, St. Stephen's College, University of Delhi, Delhi, 110007, India
| | - Bhawani Shankar
- Bioorganic Laboratory, Department of Chemistry, University of Delhi, Delhi, 110007, India; Department of Chemistry, Deshbandhu College, University of Delhi, Delhi, 110019, India
| | - Sandeep Kumar
- Bioorganic Laboratory, Department of Chemistry, University of Delhi, Delhi, 110007, India
| | - Kavita
- Bioorganic Laboratory, Department of Chemistry, University of Delhi, Delhi, 110007, India
| | - Ashok K Prasad
- Bioorganic Laboratory, Department of Chemistry, University of Delhi, Delhi, 110007, India.
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Abstract
This review summarizes the recent developments in the synthesis of a variety of substituted quinoxalines using transition metal catalysts.
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Affiliation(s)
- Vipin K. Maikhuri
- Bioorganic Laboratory
- Department of Chemistry
- University of Delhi
- Delhi 110007
- India
| | - Ashok K. Prasad
- Bioorganic Laboratory
- Department of Chemistry
- University of Delhi
- Delhi 110007
- India
| | - Amitabh Jha
- Department of Chemistry
- Acadia University
- Wolfville
- Canada
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Kumar S, Kumar S, Maity J, Kumar B, Bali Mehta S, Prasad AK. Synthesis and photophysical properties of 5-(3′′-alkyl/aryl-amino-1′′-azaindolizin-2′′-yl)-2′-deoxyuridines. NEW J CHEM 2021. [DOI: 10.1039/d1nj02423j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The Groebke–Blackburn–Bienayame (GBB) reaction has been used for the efficient synthesis of novel fluorescent 5-azaindolizino-2′-deoxyuridines starting from commercially available thymidine following two strategies.
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Affiliation(s)
- Sandeep Kumar
- Department of Chemistry, Bioorganic Laboratory, University of Delhi, Delhi 110007, India
| | - Sumit Kumar
- Department of Chemistry, Bioorganic Laboratory, University of Delhi, Delhi 110007, India
| | - Jyotirmoy Maity
- Department of Chemistry, St. Stephen's College, University of Delhi, Delhi, India
| | - Banty Kumar
- Department of Chemistry, Rajdhani College, University of Delhi, Delhi, India
| | | | - Ashok K. Prasad
- Department of Chemistry, Bioorganic Laboratory, University of Delhi, Delhi 110007, India
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Abstract
The biocatalytic synthesis of C-4′-hydroxyl-tetrahydrofurano-spironucleosides where the tetrahydrofuranospirocyclic ring at C-4′ position locks the furanose ring of nucleosides in the NE-conformation (C4′-exo).
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Affiliation(s)
- Pallavi Rungta
- Bioorganic Laboratory
- Department of Chemistry
- University of Delhi
- Delhi
- India
| | - Manish Kumar
- Bioorganic Laboratory
- Department of Chemistry
- University of Delhi
- Delhi
- India
| | - Priyanka Mangla
- Bioorganic Laboratory
- Department of Chemistry
- University of Delhi
- Delhi
- India
| | - Sandeep Kumar
- Bioorganic Laboratory
- Department of Chemistry
- University of Delhi
- Delhi
- India
| | - Ashok K. Prasad
- Bioorganic Laboratory
- Department of Chemistry
- University of Delhi
- Delhi
- India
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31
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Kumar A, Mahiya K, Prasad AK, Singh SK. Multicomponent Synthesis of 4-Aryl-1,4-Dihydro-Oxochromeno[3,2-b] Oxoindeno[6,5-e]Pyridine. Polycycl Aromat Compd 2020. [DOI: 10.1080/10406638.2020.1852269] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Affiliation(s)
- Amit Kumar
- Bioorganic Laboratory, Department of Chemistry, University of Delhi, Delhi, India
| | - Kuldeep Mahiya
- Department of Chemistry, Chaudhary Devi Lal University, Sirsa, Haryana, India
| | - Ashok K. Prasad
- Bioorganic Laboratory, Department of Chemistry, University of Delhi, Delhi, India
| | - Sunil K. Singh
- Department of Chemistry, Kirori Mal College, University of Delhi, Delhi, India
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Kumar B, Vashisht H, Goyal M, Kumar A, Benhiba F, Prasad AK, Kumar S, Bahadur I, Zarrouk A. Study of adsorption mechanism of chalcone derivatives on mild steel-sulfuric acid interface. J Mol Liq 2020. [DOI: 10.1016/j.molliq.2020.113890] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Verma V, Maikhuri VK, Khatri V, Singh A, Prasad AK. Synthesis of hexopyranosyl pyrimidine homonucleosides. SYNTHETIC COMMUN 2020. [DOI: 10.1080/00397911.2020.1836224] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- Vineet Verma
- Bioorganic Laboratory, Department of Chemistry, University of Delhi, Delhi, India
| | - Vipin K. Maikhuri
- Bioorganic Laboratory, Department of Chemistry, University of Delhi, Delhi, India
| | - Vinod Khatri
- Bioorganic Laboratory, Department of Chemistry, University of Delhi, Delhi, India
- Department of Chemistry, Pt. Neki Ram Sharma Govt. College, Rohtak, India
| | - Ankita Singh
- Bioorganic Laboratory, Department of Chemistry, University of Delhi, Delhi, India
| | - Ashok K. Prasad
- Bioorganic Laboratory, Department of Chemistry, University of Delhi, Delhi, India
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Kumar B, Shankar B, Kumar S, Maity J, Prasad AK. Multicomponent one pot synthesis of C-glucosides of 1-azaindolizines. SYNTHETIC COMMUN 2020. [DOI: 10.1080/00397911.2020.1786586] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- Banty Kumar
- Department of Chemistry, University of Delhi, Delhi, India
- Department of Chemistry, Rajdhani College, University of Delhi, Delhi, India
| | | | - Sandeep Kumar
- Department of Chemistry, University of Delhi, Delhi, India
| | - Jyotirmoy Maity
- Department of Chemistry, St. Stephen’s College, University of Delhi, Delhi, India
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35
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Singh A, Maikhuri VK, Verma V, Chhatwal RJ, Sharma D, Prasad AK. Synthesis and carboxylate anion binding studies on cyclic sugar-amino acid hybrids. SYNTHETIC COMMUN 2020. [DOI: 10.1080/00397911.2020.1785502] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- Ankita Singh
- Bioorganic Laboratory, Department of Chemistry, University of Delhi, Delhi, India
| | - Vipin K. Maikhuri
- Bioorganic Laboratory, Department of Chemistry, University of Delhi, Delhi, India
| | - Vineet Verma
- Bioorganic Laboratory, Department of Chemistry, University of Delhi, Delhi, India
| | | | - Deepti Sharma
- Sri Venkateswara College, University of Delhi, Delhi, India
| | - Ashok K. Prasad
- Bioorganic Laboratory, Department of Chemistry, University of Delhi, Delhi, India
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Kumar R, Kumar M, Kumar V, Kumar A, Haque N, Kumar R, Prasad AK. Recent progress in the synthesis of C-4′-spironucleosides and its future perspectives. SYNTHETIC COMMUN 2020. [DOI: 10.1080/00397911.2020.1803914] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- Rajesh Kumar
- Department of Chemistry, R.D.S. College, B. R. A. Bihar University, Muzaffarpur, India
| | - Manish Kumar
- Department of Chemistry, Motilal Nehru College, University of Delhi, Delhi, India
| | - Vijay Kumar
- Department of Chemistry, L. S. College, B. R. A. Bihar University, Muzaffarpur, India
| | - Arbind Kumar
- Department of Chemistry, L. S. College, B. R. A. Bihar University, Muzaffarpur, India
| | - Navedul Haque
- University Department of Chemistry, B. R. A. Bihar University, Muzaffarpur, India
| | - Ram Kumar
- Department of Chemistry, R.D.S. College, B. R. A. Bihar University, Muzaffarpur, India
| | - Ashok K. Prasad
- Bioorganic Laboratory, Department of Chemistry, University of Delhi, Delhi, India
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Kumar R, Bimal D, Kavita, Kumar M, Mathur D, Maity J, Singh SK, Thirumal M, Prasad AK. Synthesis and Antitubercular Activity of 4,5‐Disubstituted
N
1
‐(5′‐deoxythymidin‐5′‐yl)‐1,2,3‐triazoles. ChemistrySelect 2020. [DOI: 10.1002/slct.202001854] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Rajesh Kumar
- Bioorganic LaboratoryDepartment of ChemistryUniversity of Delhi Delhi 110007 India
- Department of ChemistryR.D.S. CollegeB.R.A. Bihar University Muzaffarpur 842002 India
| | - Devla Bimal
- Bioorganic LaboratoryDepartment of ChemistryUniversity of Delhi Delhi 110007 India
| | - Kavita
- Bioorganic LaboratoryDepartment of ChemistryUniversity of Delhi Delhi 110007 India
| | - Manish Kumar
- Bioorganic LaboratoryDepartment of ChemistryUniversity of Delhi Delhi 110007 India
| | - Divya Mathur
- Bioorganic LaboratoryDepartment of ChemistryUniversity of Delhi Delhi 110007 India
| | - Jyotirmoy Maity
- Department of ChemistrySt. Stephen's CollegeUniversity of Delhi Delhi 110007 India
| | - Sunil K. Singh
- Department of ChemistryKirori Mal CollegeUniversity of Delhi Delhi 110007 India
| | - M. Thirumal
- Bioorganic LaboratoryDepartment of ChemistryUniversity of Delhi Delhi 110007 India
| | - Ashok K. Prasad
- Bioorganic LaboratoryDepartment of ChemistryUniversity of Delhi Delhi 110007 India
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Abstract
A route to synthesize 1,2-disubstituted glucals has been developed, which were further converted to substituted chromanes by thermal 6π-electrocyclization in HMPA followed by in situ aromatization. One of the key steps in the synthesis of chromane is metal-free generation of C1-substituted glucal from d-mannose, which was further converted to 1,2-disubstituted glucals by Pd-catalyzed Fujiwara-Moritani reaction with styrenes, acrylates, acrylamide, acrylonitrile, and ethyl vinyl ketone in good yields.
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Affiliation(s)
- Vipin K Maikhuri
- Bioorganic Laboratory, Department of Chemistry, University of Delhi, Delhi 110007, India
| | - Vinod Khatri
- Bioorganic Laboratory, Department of Chemistry, University of Delhi, Delhi 110007, India.,Department of Chemistry, Pt. Neki Ram Sharma Govt. College, Rohtak 124001, India
| | - Amit Kumar
- Bioorganic Laboratory, Department of Chemistry, University of Delhi, Delhi 110007, India
| | - Balram Singh
- Bioorganic Laboratory, Department of Chemistry, University of Delhi, Delhi 110007, India
| | - Ashok K Prasad
- Bioorganic Laboratory, Department of Chemistry, University of Delhi, Delhi 110007, India
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39
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Kumar S, Singla H, Maity J, Mangla P, Prasad AK. Chemo-enzymatic route to bridged homolyxofuranosyl-pyrimidines. Carbohydr Res 2020; 492:108013. [DOI: 10.1016/j.carres.2020.108013] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2020] [Revised: 04/06/2020] [Accepted: 04/08/2020] [Indexed: 01/06/2023]
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40
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Abstract
Conformationally locked 3'-azido-C-4'-spirooxetano-xylonucleosides T, U, C and A have
been synthesized by following chemo-enzymatic convergent route. One of the 3'-azido-C-4'-
spirooxetano-xylonucleosides, i.e. T was converted into 3'-amino-C-4'-spirooxetano-xylothymidine by
reduction of azide to amine with H2/Pd-C in ethyl acetate in quantitative yield. The crucial step in the
synthesis of spirooxetano-xylonucleosides is the Lipozyme® TL IM-mediated exclusive diastereoselective
acetylation of 4-C-hydroxymethyl group in dihydroxysugar derivative, 3-azido-3-deoxy-4-Chydroxymethyl-
1,2-O-isopropylidene-α-D-xylofuranose in quantitative yield. The diastereoselective
monoacetylation of 4-C-hydroxymethyl in dihydroxysugar derivative was unambiguously confirmed
by X-ray crystal study on the tosylated compound obtained by the tosylation of Lipozyme® TL IM -
mediated monoacetylated sugar derivative. The broader substrate specificity and exclusive selective
nature of Lipozyme® TL IM can be utilised for the development of environmentally friendly methodologies
for the synthesis of different sugar-modified nucleosides of importance.
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Affiliation(s)
- Manish Kumar
- Bioorganic Laboratory, Department of Chemistry, University of Delhi, Delhi-110 007, India
| | - Rajesh Kumar
- Bioorganic Laboratory, Department of Chemistry, University of Delhi, Delhi-110 007, India
| | - Neha Rana
- Bioorganic Laboratory, Department of Chemistry, University of Delhi, Delhi-110 007, India
| | - Ashok K. Prasad
- Bioorganic Laboratory, Department of Chemistry, University of Delhi, Delhi-110 007, India
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41
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Bhatt AN, Rai Y, Verma A, Pandey S, Kaushik K, Parmar VS, Arya A, Prasad AK, Dwarakanath BS. Non-Enzymatic Protein Acetylation by 7-Acetoxy-4-Methylcoumarin: Implications in Protein Biochemistry. Protein Pept Lett 2020; 27:736-743. [PMID: 32133945 DOI: 10.2174/0929866527666200305143016] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2019] [Revised: 12/23/2019] [Accepted: 12/29/2019] [Indexed: 02/02/2023]
Abstract
BACKGROUND The semi-synthetic acetoxycoumarins are known to acetylate proteins using novel enzymatic Calreticulin Transacetylase (CRTAase) system in cells. However, the nonenzymatic protein acetylation by polyphenolic acetates is not known. OBJECTIVE To investigate the ability of 7-acetoxy-4-methyl coumarin (7-AMC) to acetylate proteins non-enzymatically in the test tube. METHODS We incubated 7-AMC with BSA and analyzed the protein acetylation using Western blot technique. Further, BSA induced biophysical changes in the spectroscopic properties of 7-AMC was analyzed using Fluorescence spectroscopy. RESULTS Using pan anti-acetyl lysine antibody, herein we demonstrate that 7-AMC acetylates Bovine Serum Albumin (BSA) in time and concentration dependent manner in the absence of any enzyme. 7-AMC is a relatively less fluorescent molecule compared to the parental compound, 7- hydroxy-4-methylcoumarin (7-HMC), however the fluorescence of 7-AMC increased by two fold on incubation with BSA, depending on the time of incubation and concentration of BSA. Analysis of the reaction mixture of 7-AMC and BSA after filtration revealed that the increased fluorescence is associated with the compound of lower molecular weight in the filtrate and not residual BSA, suggesting that the less fluorescent 7-AMC undergoes self-hydrolysis in the presence of protein to give highly fluorescent parental molecule 7-HMC and acetate ion in polar solvent (phosphate buffered saline, PBS). The protein augmented conversion of 7-AMC to 7-HMC was found to be linearly related to the protein concentration. CONCLUSION Thus protein acetylation induced by 7-AMC could also be non-enzymatic in nature and this molecule can be exploited for quantification of proteins.
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Affiliation(s)
- Anant Narayan Bhatt
- Institute of Nuclear Medicine and Allied Sciences, Brig. S.K. Majumdar Marg, Timarpur, Delhi, India
| | - Yogesh Rai
- Institute of Nuclear Medicine and Allied Sciences, Brig. S.K. Majumdar Marg, Timarpur, Delhi, India
| | - Amit Verma
- Institute of Nuclear Medicine and Allied Sciences, Brig. S.K. Majumdar Marg, Timarpur, Delhi, India
| | - Sanjay Pandey
- Institute of Nuclear Medicine and Allied Sciences, Brig. S.K. Majumdar Marg, Timarpur, Delhi, India
| | - Kumar Kaushik
- Department of Chemistry and Environmental Science, Medgar Evers College, The City University of New York, New York City, NY, United States
| | - Virinder S Parmar
- Department of Chemistry and Environmental Science, Medgar Evers College, The City University of New York, New York City, NY, United States
| | - Anu Arya
- V.P. Chest Institute, Delhi, India
| | - Ashok K Prasad
- Deparment of Chemistry, University of Delhi, Delhi, India
| | - Bilikere S Dwarakanath
- Institute of Nuclear Medicine and Allied Sciences, Brig. S.K. Majumdar Marg, Timarpur, Delhi, India
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42
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Venkateswaran K, Shrivastava A, Prasad AK, Parmar VS, Dwarakanath BS. Developing polyphenolic acetates as radiation countermeasure agents: current status and future perspectives. Drug Discov Today 2020; 25:781-786. [PMID: 32062010 DOI: 10.1016/j.drudis.2020.02.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2019] [Revised: 01/22/2020] [Accepted: 02/07/2020] [Indexed: 10/25/2022]
Abstract
Total-body exposure to ionizing radiation (TBI) results in life-threatening acute radiation syndrome (ARS), which encompasses hematopoietic and gastrointestinal (GI) injuries and results in dose-dependent morbidity and mortality. Management of ARS warrants the deployment of effective medical countermeasure agents (MCM) that protect against and/or mitigate lethal radiation injury. The polyphenolic acetate (PA) 7,8-diacetoxy-4-methylthiocoumarin (DAMTC) has been identified as a potential MCM against ARS by virtue of it mitigating the lethal effects of TBI in C57BL/6 mice. Herein, we describe current evidence, including mechanistic aspects, for the use of PAs as MCMs against ARS and provide perspectives for their further development as approved drugs for the mitigation of ARS.
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Affiliation(s)
| | | | - Ashok K Prasad
- Bioorganic Laboratory, Department of Chemistry, University of Delhi, Delhi 110007, India
| | - Virinder S Parmar
- Bioorganic Laboratory, Department of Chemistry, University of Delhi, Delhi 110007, India; Department of Chemistry and Environmental Science, Medgar Evers College, The City University of New York, New York NY, USA
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43
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Matta A, Sharma AK, Tomar S, Cao P, Kumar S, Balwani S, Ghosh B, Prasad AK, Van der Eycken EV, DePass AL, Wengel J, Parmar VS, Len C, Singh BK. Synthesis and anti-inflammatory activity evaluation of novel chroman derivatives. NEW J CHEM 2020. [DOI: 10.1039/d0nj02125c] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
In an effort to develop potent anti-inflammatory agents, a series of novel chroman derivatives including acyclic amidochromans, chromanyl esters and chromanyl acrylates have been designed, synthesized and fully characterized.
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Singhal D, Althagafi I, Kumar A, Yadav S, Prasad AK, Pratap R. Thieno[3,2-c]pyran: an ESIPT based fluorescence “turn-on” molecular chemosensor with AIE properties for the selective recognition of Zn2+ ion. NEW J CHEM 2020. [DOI: 10.1039/d0nj02236e] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Thieno[3,2-c]pyran was synthesized as a fluorescent turn-on chemosensor for the selective recognition of Zn2+ ions with a low detection limit (0.67 μM), and it also exhibited AIE properties.
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Affiliation(s)
- Divya Singhal
- Department of Chemistry
- University of Delhi, North Campus
- Delhi-110007
- India
| | | | - Ashish Kumar
- Department of Chemistry
- University of Delhi, North Campus
- Delhi-110007
- India
| | - Saroj Yadav
- Department of Chemistry
- University of Delhi, North Campus
- Delhi-110007
- India
| | - Ashok K. Prasad
- Department of Chemistry
- University of Delhi, North Campus
- Delhi-110007
- India
| | - Ramendra Pratap
- Department of Chemistry
- University of Delhi, North Campus
- Delhi-110007
- India
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45
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Khatri V, Bhatia S, Deep S, Kohli E, Haag R, Senapati NN, Prasad AK. Exploring hydrophobic diastereomeric 2,6-anhydro-glycoheptitols for their enzymatic polymerization with PEG: towards delivery applications. NEW J CHEM 2020. [DOI: 10.1039/d0nj02642e] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Two sugar PEG-based amphiphilic copolymers have been synthesized by Novozym®-435-catalyzed greener solvent free transesterification reaction of diastereomeric 2,6-anhydro-glucoheptitol and 2,6-anhydro-mannoheptitol with PEG-1000 diethyl ester.
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Affiliation(s)
- Vinod Khatri
- Bioorganic Laboratory, Department of Chemistry, University of Delhi
- Delhi 110 007
- India
- Department of Chemistry, Pt. Neki Ram Sharma Government College
- Rohtak-124001
| | - Sumati Bhatia
- Institute for Chemistry and Biochemistry, Free University Berlin
- 14195 Berlin
- Germany
| | - Satyanarayan Deep
- Bioorganic Laboratory, Department of Chemistry, University of Delhi
- Delhi 110 007
- India
- DRDO, DIPAS
- Timarpur
| | | | - Rainer Haag
- Institute for Chemistry and Biochemistry, Free University Berlin
- 14195 Berlin
- Germany
| | | | - Ashok K. Prasad
- Bioorganic Laboratory, Department of Chemistry, University of Delhi
- Delhi 110 007
- India
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46
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Yadav Y, Sharma D, Kaushik K, Kumar V, Jha A, Prasad AK, Len C, Malhotra SV, Wengel J, Parmar VS. Synthetic, Structural, and Anticancer Activity Evaluation Studies on Novel Pyrazolylnucleosides. Molecules 2019; 24:molecules24213922. [PMID: 31671703 PMCID: PMC6864788 DOI: 10.3390/molecules24213922] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2019] [Revised: 10/22/2019] [Accepted: 10/28/2019] [Indexed: 11/16/2022] Open
Abstract
The synthesis of novel pyrazolylnucleosides 3a–e, 4a–e, 5a–e, and 6a–e are described. The structures of the regioisomers were elucidated by using extensive NMR studies. The pyrazolylnucleosides 5a–e and 6a–e were screened for anticancer activities on sixty human tumor cell lines. The compound 6e showed good activity against 39 cancer cell lines. In particular, it showed significant inhibition against the lung cancer cell line Hop-92 (GI50 9.3 µM) and breast cancer cell line HS 578T (GI50 3.0 µM).
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Affiliation(s)
- Yogesh Yadav
- Bioorganic Laboratory, Department of Chemistry, University of Delhi, Delhi 110 007, India.
- Medicinal Chemistry Laboratory, Department of Chemistry, Acadia University, Wolfville, NS B4P 2R6, Canada.
- SUN Pharmaceuticals R&D, Gurgaon, Sarhaul, Sector-18, Haryana-122 015, India.
| | - Deepti Sharma
- Bioorganic Laboratory, Department of Chemistry, University of Delhi, Delhi 110 007, India.
- Sri Venkateswara College, Benito Juarez Road, Dhaula Kuan, University of Delhi, Delhi 110 021, India.
| | - Kumar Kaushik
- Department of Chemistry and Environmental Science, Medgar Evers College, The City University of New York, 1638 Bedford Avenue, Brooklyn, NY 11225, USA.
| | - Vineet Kumar
- Bioorganic Laboratory, Department of Chemistry, University of Delhi, Delhi 110 007, India.
- Laboratory of Synthetic Chemistry, Leidos Biomedical Research Inc., Frederick National Laboratory for Cancer Research, Frederick, MD 2170, USA.
- Department of Radiation Oncology, Stanford University, 1050A Arastradero Road, A252, Palo Alto, CA 94304, USA.
| | - Amitabh Jha
- Medicinal Chemistry Laboratory, Department of Chemistry, Acadia University, Wolfville, NS B4P 2R6, Canada.
| | - Ashok K Prasad
- Bioorganic Laboratory, Department of Chemistry, University of Delhi, Delhi 110 007, India.
| | - Christophe Len
- Chimie ParisTech, PSL University, CNRS Institute of Chemistry for Life and Health Sciences-i-CLeHS, 11 rue Pierre et Marie Curie, F-75005 Paris, France.
| | - Sanjay V Malhotra
- Laboratory of Synthetic Chemistry, Leidos Biomedical Research Inc., Frederick National Laboratory for Cancer Research, Frederick, MD 2170, USA.
- Department of Radiation Oncology, Stanford University, 1050A Arastradero Road, A252, Palo Alto, CA 94304, USA.
| | - Jesper Wengel
- Nucleic Acid Center, Department of Physics, Chemistry and Pharmacy, University of Southern Denmark, Campusvej 55, DK-5230 Odense, Denmark.
| | - Virinder S Parmar
- Bioorganic Laboratory, Department of Chemistry, University of Delhi, Delhi 110 007, India.
- Department of Chemistry and Environmental Science, Medgar Evers College, The City University of New York, 1638 Bedford Avenue, Brooklyn, NY 11225, USA.
- Nucleic Acid Center, Department of Physics, Chemistry and Pharmacy, University of Southern Denmark, Campusvej 55, DK-5230 Odense, Denmark.
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Affiliation(s)
- Vipin K. Maikhuri
- Bioorganic Laboratory, Department of Chemistry, University of Delhi, Delhi, India
| | - Kapil Bohra
- Department of Chemistry, DDU College, University of Delhi, Delhi, India
| | - Smriti Srivastava
- Bioorganic Laboratory, Department of Chemistry, University of Delhi, Delhi, India
| | - Kavita
- Bioorganic Laboratory, Department of Chemistry, University of Delhi, Delhi, India
| | - Ashok K. Prasad
- Bioorganic Laboratory, Department of Chemistry, University of Delhi, Delhi, India
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48
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Singh B, Kumar S, Maity J, Roy I, Prasad AK. Bamford-Stevens reaction assisted synthesis of styrene C-glycosides. SYNTHETIC COMMUN 2019. [DOI: 10.1080/00397911.2019.1606921] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Affiliation(s)
- Balram Singh
- Bioorganic Laboratory, Department of Chemistry, University of Delhi, Delhi, India
| | - Sandeep Kumar
- Bioorganic Laboratory, Department of Chemistry, University of Delhi, Delhi, India
| | - Jyotirmoy Maity
- Bioorganic Laboratory, Department of Chemistry, University of Delhi, Delhi, India
| | - Indrajit Roy
- Bioorganic Laboratory, Department of Chemistry, University of Delhi, Delhi, India
| | - Ashok K. Prasad
- Bioorganic Laboratory, Department of Chemistry, University of Delhi, Delhi, India
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Gahlyan P, Bawa R, Jain H, Dalela M, Joshi A, Ramachandran CN, Prasad AK, Kaur A, Kumar R. Isatin‐Triazole‐Functionalized Rhodamine: A Dual Sensor for Cu2+and Fe3+Ions and Its Application to Cell Imaging. ChemistrySelect 2019. [DOI: 10.1002/slct.201901374] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Affiliation(s)
- Parveen Gahlyan
- Bioorganic LaboratoryDepartment of ChemistryUniversity of Delhi Delhi-110007 India
| | - Rashim Bawa
- Bioorganic LaboratoryDepartment of ChemistryUniversity of Delhi Delhi-110007 India
| | - Harshita Jain
- Bioorganic LaboratoryDepartment of ChemistryUniversity of Delhi Delhi-110007 India
| | - Manu Dalela
- Stem Cell Facility (Centre for Excellence for Stem Cell Research)All India Institute of Medical Sciences New Delhi-110029 India
| | - Ankita Joshi
- Department of ChemistryIndian Institute of Technology Roorkee Uttarakhand-247667 India
| | - C. N. Ramachandran
- Department of ChemistryIndian Institute of Technology Roorkee Uttarakhand-247667 India
| | - Ashok K. Prasad
- Bioorganic LaboratoryDepartment of ChemistryUniversity of Delhi Delhi-110007 India
| | - Arunjit Kaur
- Department of ChemistryLyallpur Khalsa College, Jalandhar Punjab-144001 India
| | - Rakesh Kumar
- Bioorganic LaboratoryDepartment of ChemistryUniversity of Delhi Delhi-110007 India
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50
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Mangla P, Maity J, Rungta P, Verma V, Sanghvi YS, Prasad AK. Synthesis of 6′‐Methyl‐2′‐
O
,4′‐
C
‐methylene‐
α
‐L‐ ribofuranosyl‐pyrimidine Nucleosides. ChemistrySelect 2019. [DOI: 10.1002/slct.201900809] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Priyanka Mangla
- Bioorganic Laboratory, Department of ChemistryUniversity of Delhi Delhi- 110 007 India
| | - Jyotirmoy Maity
- Bioorganic Laboratory, Department of ChemistryUniversity of Delhi Delhi- 110 007 India
| | - Pallavi Rungta
- Bioorganic Laboratory, Department of ChemistryUniversity of Delhi Delhi- 110 007 India
| | - Vineet Verma
- Bioorganic Laboratory, Department of ChemistryUniversity of Delhi Delhi- 110 007 India
| | | | - Ashok K. Prasad
- Bioorganic Laboratory, Department of ChemistryUniversity of Delhi Delhi- 110 007 India
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