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Suzuki H, Sekino K, Kondo S, Minamikawa R, Matsuda T. Modular synthesis of 3,3-disubstituted oxindoles from nitrones and acrylic acids. Org Biomol Chem 2024; 22:6282-6287. [PMID: 39034769 DOI: 10.1039/d4ob00964a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/23/2024]
Abstract
We developed a modular synthesis for 3,3-disubstituted oxindoles, utilising readily accessible nitrones and acrylic acids. This approach facilitates the preparation of a diverse array of oxindoles through the variation of the starting materials. We demonstrated the applicability of this method through a gram-scale reaction and a synthesis of esermethole.
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Affiliation(s)
- Hirotsugu Suzuki
- Tenure-Track Program for Innovative Research, University of Fukui, 3-9-1 Bunkyo, Fukui-shi, Fukui 910-8507, Japan.
| | - Kaisei Sekino
- Department of Applied Chemistry, Tokyo University of Science, 1-3 Kagurazaka, Shinjuku-ku, Tokyo 162-8601, Japan.
| | - Sora Kondo
- Department of Applied Chemistry, Tokyo University of Science, 1-3 Kagurazaka, Shinjuku-ku, Tokyo 162-8601, Japan.
| | - Ryo Minamikawa
- Department of Applied Chemistry, Tokyo University of Science, 1-3 Kagurazaka, Shinjuku-ku, Tokyo 162-8601, Japan.
| | - Takanori Matsuda
- Department of Applied Chemistry, Tokyo University of Science, 1-3 Kagurazaka, Shinjuku-ku, Tokyo 162-8601, Japan.
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2
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Microwave-Assisted Synthesis of 3-Hydroxy-2-oxindoles and Pilot Evaluation of Their Antiglaucomic Activity. Int J Mol Sci 2023; 24:ijms24065101. [PMID: 36982181 PMCID: PMC10049166 DOI: 10.3390/ijms24065101] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2023] [Revised: 02/24/2023] [Accepted: 03/04/2023] [Indexed: 03/11/2023] Open
Abstract
Glaucoma is a widespread neurodegenerative disease for which increased intraocular pressure (IOP) is a primary modifiable risk factor. Recently, we have observed that compounds with oxindole scaffolds are involved in the regulation of intraocular pressure and therefore have potential antiglaucomic activity. In this article, we present an efficient method for obtaining novel 2-oxindole derivatives via microwave-assisted (MW) decarboxylative condensation of substituted isatins with malonic and cyanoacetic acids. Various 3-hydroxy-2-oxindoles were synthesized using MW activation for 5–10 min with high yields (up to 98%). The influence of novel compounds applied in instillations on IOP was studied in vivo on normotensive rabbits. The lead compound was found to reduce the IOP by 5.6 Torr (ΔIOP for the widely used antiglaucomatousic drug timolol 3.5 Torr and for melatonin 2.7 Torr).
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Seckler D, Dea CM, Rios EAM, de Godoi M, Rampon DDS, D’Oca MGM, D'Oca CDRM. Rice straw ash extract/glycerol: an efficient sustainable approach for Knoevenagel condensation. NEW J CHEM 2022. [DOI: 10.1039/d1nj05755c] [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
WERSA/glycerol is described as a powerful combination for the green approach of the Knoevenagel reaction, without any additional catalyst, base or promoter.
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Affiliation(s)
- Diego Seckler
- Laboratory of Polymers and Catalysis (LAPOCA), Department of Chemistry, Federal University of Paraná – UFPR, P. O. Box 19032, Curitiba, PR, 81531-990, Brazil
- Kolbe's Laboratory of Organic Synthesis, Department of Chemistry, Federal University of Paraná – UFPR, P. O. Box 19032, Curitiba, PR, 81531-990, Brazil
| | - Camila M. Dea
- Laboratory of Polymers and Catalysis (LAPOCA), Department of Chemistry, Federal University of Paraná – UFPR, P. O. Box 19032, Curitiba, PR, 81531-990, Brazil
| | - Elise Ane Maluf Rios
- Laboratory of Polymers and Catalysis (LAPOCA), Department of Chemistry, Federal University of Paraná – UFPR, P. O. Box 19032, Curitiba, PR, 81531-990, Brazil
| | - Marcelo de Godoi
- Food and Chemistry School, Federal University of Rio Grande – FURG, RS 95500-000, Brazil
| | - Daniel da Silveira Rampon
- Laboratory of Polymers and Catalysis (LAPOCA), Department of Chemistry, Federal University of Paraná – UFPR, P. O. Box 19032, Curitiba, PR, 81531-990, Brazil
| | - Marcelo Gonçalves Montes D’Oca
- Kolbe's Laboratory of Organic Synthesis, Department of Chemistry, Federal University of Paraná – UFPR, P. O. Box 19032, Curitiba, PR, 81531-990, Brazil
| | - Caroline Da Ros Montes D'Oca
- Laboratory of Polymers and Catalysis (LAPOCA), Department of Chemistry, Federal University of Paraná – UFPR, P. O. Box 19032, Curitiba, PR, 81531-990, Brazil
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Borah B, Dwivedi KD, Chowhan LR. Review on Synthesis and Medicinal Application of Dihydropyrano[3,2-b]Pyrans and Spiro-Pyrano[3,2-b]Pyrans by Employing the Reactivity of 5-Hydroxy-2-(Hydroxymethyl)-4H-Pyran-4-One. Polycycl Aromat Compd 2021. [DOI: 10.1080/10406638.2021.1962923] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Biplob Borah
- School of Applied Material Sciences, Central University of Gujarat, Gandhinagar, India
| | - Kartikey Dhar Dwivedi
- School of Applied Material Sciences, Central University of Gujarat, Gandhinagar, India
| | - L. Raju Chowhan
- School of Applied Material Sciences, Central University of Gujarat, Gandhinagar, India
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Naidu BR, Lakshmidevi J, Naik BSS, Venkateswarlu K. Water extract of pomegranate ash as waste-originated biorenewable catalyst for the novel synthesis of chiral tert‑butanesulfinyl aldimines in water. MOLECULAR CATALYSIS 2021. [DOI: 10.1016/j.mcat.2021.111719] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
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Acetyl oxime/azirine 1, 3-dipole and strategy for the regioselective synthesis of polysubstituted pyrroles via [3 + 2] cycloaddition with alkyne utilizing Fe2O3@cellulose catalyst. RESULTS IN CHEMISTRY 2021. [DOI: 10.1016/j.rechem.2021.100201] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
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Vasantha R., Lenin DV, Rao LC, Satish Kumar N. Water Extract of Lemon (WEL) as a Promoter: Green and Regioselective Synthesis of Alkyl‐4‐(1
H
‐indol‐3 yl)‐2‐alkyl‐4
H
‐chromene‐3‐carboxylates Using 4
H
‐chromenes and Indoles. ChemistrySelect 2020. [DOI: 10.1002/slct.202003542] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Vasantha R.
- School of Chemical Sciences Central University of Gujarat Sector 30 Gandhinagar, Gujarat India- 382030
| | - Dandamudi V Lenin
- School of Chemical Sciences Central University of Gujarat Sector 30 Gandhinagar, Gujarat India- 382030
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Dwivedi KD, Borah B, Chowhan LR. Ligand Free One-Pot Synthesis of Pyrano[2,3- c]pyrazoles in Water Extract of Banana Peel (WEB): A Green Chemistry Approach. Front Chem 2020; 7:944. [PMID: 32039156 PMCID: PMC6987396 DOI: 10.3389/fchem.2019.00944] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2019] [Accepted: 12/31/2019] [Indexed: 01/11/2023] Open
Abstract
Here, we have developed a novel, simple, efficient, and green protocol for one-pot synthesis of pyrano[2,3-c]pyrazole using arylidene malononitrile and pyrazolone in Water Extract of Banana Peels (WEB) as a reaction medium at room temperature (r.t.). This is a green and general synthetic protocol without utilization of any toxic organic solvent, ligand, base that could be applicable for the wide substrate scope in good to excellent yields. This protocol has various advantages such as fast reactions, eco-friendly reaction conditions, easy isolation of the product without using column chromatography. The green chemistry matrices calculation like atom economy reaction, environmental factor, as well as process mass intensity indicates the eco-friendly nature of the protocol.
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Affiliation(s)
| | | | - L. Raju Chowhan
- Centre for Applied Chemistry, Central University of Gujarat, Gandhinagar, India
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Lakshmi SR, Singh V, Chowhan LR. Highly efficient catalyst-free domino conjugate addition, decarboxylation and esterification/amidation of coumarin carboxylic acid/esters with pyrazolones: a green chemistry approach. RSC Adv 2020; 10:13866-13871. [PMID: 35492966 PMCID: PMC9051535 DOI: 10.1039/d0ra01906b] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2020] [Accepted: 03/13/2020] [Indexed: 01/29/2023] Open
Abstract
Tandem conjugate addition, decarboxylation and esterification/amidation of coumarin 3-carboxylic acid derivatives with pyrazolones have been developed.
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Affiliation(s)
- Shanta Raj Lakshmi
- Centre for Applied Chemistry
- Central University of Gujarat
- Gandhinagar
- India
| | - Vipin Singh
- Centre for Applied Chemistry
- Central University of Gujarat
- Gandhinagar
- India
| | - L. Raju Chowhan
- Centre for Applied Chemistry
- Central University of Gujarat
- Gandhinagar
- India
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