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Natarajan P, Priya, Chuskit D. Persulfate-nitrogen doped graphene mixture as an oxidant for the synthesis of 3-nitro-4-aryl-2 H-chromen-2-ones from aryl alkynoate esters and nitrite. Org Biomol Chem 2022; 20:4616-4624. [PMID: 35608321 DOI: 10.1039/d2ob00827k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A series of 3-nitro-4-aryl-2H-chromen-2-ones in good yields have directly been obtained from aryl alkynoate esters and nitrite by employing a mixture of K2S2O8-nitrogen doped graphene as an oxidant in a watery medium at room temperature. A plausible mechanism for the reaction is also reported. It reveals that the product is formed through a cascade of nitro radical addition, spirocyclization, and ester migration. When compared to known methods for the synthesis of 3-nitro-4-aryl-2H-chromen-2-ones from aryl alkynoate esters, this protocol is environmentally friendly, sustainable, practical and energy efficient and does not use a harmful nitro source. Furthermore, nitrogen doped graphene used in this approach can be easily recovered and reused at least four times without losing its activity.
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Affiliation(s)
- Palani Natarajan
- Department of Chemistry & Centre for Advanced Studies in Chemistry, Panjab University, Chandigarh - 160 014, India.
| | - Priya
- Department of Chemistry & Centre for Advanced Studies in Chemistry, Panjab University, Chandigarh - 160 014, India.
| | - Deachen Chuskit
- Department of Chemistry & Centre for Advanced Studies in Chemistry, Panjab University, Chandigarh - 160 014, India.
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2
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Kapale SS, Chaudhari HK, Mali SN, Takale BS, Pawar H. A sustainable approach towards the three-component synthesis of unsubstituted 1 H-imidazoles in the water at ambient conditions. JOURNAL OF ASIAN NATURAL PRODUCTS RESEARCH 2021; 23:712-716. [PMID: 32400182 DOI: 10.1080/10286020.2020.1760852] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/15/2020] [Revised: 04/21/2020] [Accepted: 04/22/2020] [Indexed: 06/11/2023]
Abstract
A green protocol for the synthesis of unsubstituted imidazoles has been demonstrated herein. The reaction is realized using commercially available lipase enzyme, porcine pancreas lipase (PPL) in water. The reaction conditions are selective and mild which helped to tolerate a wide variety of functional groups to give the desired products in good chemical yields.[Formula: see text].
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Affiliation(s)
- Suraj S Kapale
- Department of Pharmaceutical Sciences and Technology, Institute of Chemical Technology, Nathalal Parekh Marg, Matunga (E), Mumbai 400019, India
| | - Hemchandra K Chaudhari
- Department of Pharmaceutical Sciences and Technology, Institute of Chemical Technology, Nathalal Parekh Marg, Matunga (E), Mumbai 400019, India
| | - Suraj N Mali
- Department of Pharmaceutical Sciences and Technology, Institute of Chemical Technology, Nathalal Parekh Marg, Matunga (E), Mumbai 400019, India
| | - Balaram S Takale
- Department of Chemistry and Biochemistry, University of California, Santa Barbara, CA 93106, USA
| | - Hitesh Pawar
- Centre of Biosciences, Institute of Chemical Technology, Matunga (E), Mumbai 400019, India
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Mustafa YF, Kasim SM, Al-Dabbagh BM, Al-Shakarchi W. Synthesis, characterization and biological evaluation of new azo-coumarinic derivatives. APPLIED NANOSCIENCE 2021. [DOI: 10.1007/s13204-021-01873-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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4
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Synthesis, characterization, and biomedical assessment of novel bisimidazole–coumarin conjugates. APPLIED NANOSCIENCE 2021. [DOI: 10.1007/s13204-021-01872-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Hu L, Zheng T, Song Y, Fan J, Li H, Zhang R, Sun Y. Ultrasensitive and selective fluorescent sensor for cysteine and application to drug analysis and bioimaging. Anal Biochem 2021; 620:114138. [PMID: 33639112 DOI: 10.1016/j.ab.2021.114138] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2020] [Revised: 01/29/2021] [Accepted: 02/12/2021] [Indexed: 01/26/2023]
Abstract
A fluorescent sensor based on coumarin-maleimide conjugate was developed for efficient discrimination of Cys from Hcy and GSH in both organic and aqueous solution. Addition of Cys to the non-fluorescent sensor solution in DMF induced bright blue fluorescence and enhanced the fluorescence intensity by 320-fold while other amino acids and biothiols (Gly, Hcy, GSH, Glu, Val, Tyr, Arg, Trp, Lys, His, Leu, Phe, Asp and Met) did not bring about remarked change. The sensor responds to Cys extremely rapidly. If Cys was added to the sensor solution, the fluorescence intensity increased by 170-fold immediately and attained the maximum value in 5 min. A linear relationship was observed between Cys concentration within 2-20 μM and the fluorescence intensity of the sensor solution. The detection limit of the sensor toward Cys is as low as 4.7 nM. The sensor is also effective for specific detection of Cys in aqueous (DMF/H2O = 9:1, v/v) solution. Practical application of the sensor to drug analysis and bioimaging of living Hela cells has been verified. Possible sensing mechanism of the sensor toward Cys has been proposed.
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Affiliation(s)
- Luping Hu
- Key Laboratory of Science and Technology of Eco-Textiles, Ministry of Education, College of Chemistry, Chemical Engineering & Biotechnology, Donghua University, 2999 North Renmin Road, Shanghai, 201620, PR China
| | - Tao Zheng
- Department of Health Technology, Technical University of Denmark, Kgs, Lyngby, 2800, Denmark
| | - Yanxi Song
- College of Environmental Science and Engineering, Donghua University, 2999 North Renmin Road, Shanghai, 201620, PR China
| | - Ji Fan
- Key Laboratory of Science and Technology of Eco-Textiles, Ministry of Education, College of Chemistry, Chemical Engineering & Biotechnology, Donghua University, 2999 North Renmin Road, Shanghai, 201620, PR China
| | - Hongqi Li
- Key Laboratory of Science and Technology of Eco-Textiles, Ministry of Education, College of Chemistry, Chemical Engineering & Biotechnology, Donghua University, 2999 North Renmin Road, Shanghai, 201620, PR China.
| | - Ruiqing Zhang
- Key Laboratory of Science and Technology of Eco-Textiles, Ministry of Education, College of Chemistry, Chemical Engineering & Biotechnology, Donghua University, 2999 North Renmin Road, Shanghai, 201620, PR China
| | - Yi Sun
- Department of Health Technology, Technical University of Denmark, Kgs, Lyngby, 2800, Denmark
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Overview on developed synthesis procedures of coumarin heterocycles. JOURNAL OF THE IRANIAN CHEMICAL SOCIETY 2020. [DOI: 10.1007/s13738-020-01984-1] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
AbstractConsidering highly valuable biological and pharmaceutical properties of coumarins, the synthesis of these heterocycles has been considered for many organic and pharmaceutical chemists. This review includes the recent research in synthesis methods of coumarin systems, investigating their biological properties and describing the literature reports for the period of 2016 to the middle of 2020. In this review, we have classified the contents based on co-groups of coumarin ring. These reported methods are carried out in the classical and non-classical conditions particularly under green condition such as using green solvent, catalyst and other procedures.
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Gadkari YU, Hatvate NT, Takale BS, Telvekar VN. Concentrated solar radiation as a renewable heat source for a preparative-scale and solvent-free Biginelli reaction. NEW J CHEM 2020. [DOI: 10.1039/d0nj01351j] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Highly sustainable, economical, and faster Biginelli reaction has been established using concentrated solar radiation.
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Affiliation(s)
- Yatin U. Gadkari
- Department of Pharmaceutical Sciences and Technology
- Institute of Chemical Technology
- Mumbai
- India
| | - Navnath T. Hatvate
- Department of Pharmaceutical Sciences and Technology
- Institute of Chemical Technology
- Mumbai
- India
| | - Balaram S. Takale
- Department of Chemistry and Biochemistry
- University of California
- Santa Barbara
- USA
| | - Vikas N. Telvekar
- Department of Pharmaceutical Sciences and Technology
- Institute of Chemical Technology
- Mumbai
- India
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Wani RR, Chaudhari HK, Takale BS. Solvent Free Synthesis of N‐Substituted Pyrroles Catalyzed by Calcium Nitrate. J Heterocycl Chem 2019. [DOI: 10.1002/jhet.3507] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Rucha R. Wani
- Department of Pharmaceutical Sciences and Technology Institute of Chemical Technology Matunga (E) Mumbai Maharashtra 400 019 India
| | - Hemchandra K. Chaudhari
- Department of Pharmaceutical Sciences and Technology Institute of Chemical Technology Matunga (E) Mumbai Maharashtra 400 019 India
| | - Balaram S. Takale
- Department of Chemistry and Biochemistry University of California Santa Barbara California 93106 USA
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Novel 4-Methylumbelliferone Amide Derivatives: Synthesis, Characterization and Pesticidal Activities. Molecules 2018; 23:molecules23010122. [PMID: 29316710 PMCID: PMC6017845 DOI: 10.3390/molecules23010122] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2017] [Revised: 01/03/2018] [Accepted: 01/06/2018] [Indexed: 12/02/2022] Open
Abstract
A series of novel 4-methylumbelliferone amide derivatives were designed, synthesized and characterized by 1H NMR, 13C NMR and HR-ESI-MS. The structures of compounds 4bd and 4be (compounds named by authors) were further confirmed by X-ray single crystal diffraction. The acaricidal, herbicidal and antifungal activities of the synthesized compounds were assayed for their potential use as pesticide. The results indicated that compounds 4bi, 4ac and 4bd were strong acaricidals against Tetranychus cinnabarinus, with 72h corrected mortalities of greater than 80% at 1000 mg/L. Meanwhile, compounds 4bh and 4bf exhibit the strongest inhibition against the taproot development of Digitaria sanguinalis and Chenopodium glaucum, and were even more potent than the commercial herbicide Acetochlor against D. sanguinalis. In addition, compounds 4bk, 4bh and 4bp showed the highest antifungal activity against the mycelium growth of Valsa mali, which makes them more effective than commercial fungicide Carbendazim.
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