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Dalal DS, Patil DR, Tayade YA. β‐Cyclodextrin: A Green and Efficient Supramolecular Catalyst for Organic Transformations. CHEM REC 2018; 18:1560-1582. [DOI: 10.1002/tcr.201800016] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2018] [Accepted: 05/07/2018] [Indexed: 12/16/2022]
Affiliation(s)
- Dipak S. Dalal
- Department of Organic Chemistry, School of Chemical SciencesNorth Maharashtra University Jalgaon – 425 001 (M. S.) India
| | - Dipak R. Patil
- Department of Organic Chemistry, School of Chemical SciencesNorth Maharashtra University Jalgaon – 425 001 (M. S.) India
| | - Yogesh A. Tayade
- Department of Organic Chemistry, School of Chemical SciencesNorth Maharashtra University Jalgaon – 425 001 (M. S.) India
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Poulhès F, Rizzato E, Bernasconi P, Rosas R, Viel S, Jicsinszky L, Rockenbauer A, Bardelang D, Siri D, Gaudel-Siri A, Karoui H, Hardy M, Ouari O. Synthesis and properties of a series of β-cyclodextrin/nitrone spin traps for improved superoxide detection. Org Biomol Chem 2018; 15:6358-6366. [PMID: 28715016 DOI: 10.1039/c7ob00961e] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
Three new DEPMPO-based spin traps have been designed and synthesized for improved superoxide detection, each carrying a cyclodextrin (CD) moiety but with a different alkyl chain on the phosphorus atom or with a long spacer arm. EPR spectroscopy allowed us to estimate the half-life of the superoxide spin adducts which is close to the value previously reported for CD-DEPMPO (t1/2 ≈ 50-55 min under the conditions investigated). The spectra are typical of superoxide adducts (almost no features of the HO˙ adduct that usually forms with time for other nitrone spin traps such as DMPO) and we show that at 250 μM, the new spin trap enables the reliable detection of superoxide by 1 scan at the position opposite to the corresponding spin trap without the CD moiety. The resistance of the spin adducts to a reduction process has been evaluated, and the superoxide spin adducts are sensitive to ascorbate and glutathione (GSH), but not to glutathione peroxidase/GSH, reflecting the exposed nature of the nitroxide moiety to the bulk solvent. To understand these results, 2D-ROESY NMR studies and molecular dynamics pointed to a shallow or surface self-inclusion of the nitrone spin traps and of nitroxide spin adducts presumably due to the high flexibility of the permethyl-β-CD rim.
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Affiliation(s)
- Florent Poulhès
- Aix Marseille Univ, CNRS, ICR, UMR 7273, SREP, 13013 Marseille, France
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Floresta G, Talotta C, Gaeta C, De Rosa M, Chiacchio U, Neri P, Rescifina A. γ-Cyclodextrin as a Catalyst for the Synthesis of 2-Methyl-3,5-diarylisoxazolidines in Water. J Org Chem 2017; 82:4631-4639. [PMID: 28406307 DOI: 10.1021/acs.joc.7b00227] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A green and efficient 1,3-dipolar cycloaddition of nitrones with different styrenes and cinnamates using a catalytic amount of γ-cyclodextrin (γ-CD) in water has been developed to give substituted isoxazolidines. γ-CD was found to be highly efficacious in carrying out this reaction under an eco-friendly environment, affording moderate to excellent yields and, in some cases, excellent diastereomeric excess (up to >95%) at 100 °C in 8-12 h. The catalyst can be easily recuperated and recycled for several times without loss of activity. Water, an eco-friendly reaction medium, has been utilized for the first time, to the best of our knowledge, in this reaction. The credit of the presented protocol includes high yields and catalyst reusability, and precludes the use of organic solvents. The use of in silico calculations allowed us to rationalize the obtained results and to improve the stereoselectivity.
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Affiliation(s)
- Giuseppe Floresta
- Dipartimento di Scienze del Farmaco, Università di Catania , Viale Andrea Doria 6, 95125 - Catania, Italy.,Dipartimento di Scienze Chimiche, Università di Catania , Viale Andrea Doria 6, 95125 - Catania, Italy
| | - Carmen Talotta
- Dipartimento di Chimica e Biologia "A. Zambelli", Università di Salerno , Via Giovanni Paolo II 132, 84084 - Fisciano (SA), Italy
| | - Carmine Gaeta
- Dipartimento di Chimica e Biologia "A. Zambelli", Università di Salerno , Via Giovanni Paolo II 132, 84084 - Fisciano (SA), Italy
| | - Margherita De Rosa
- Dipartimento di Chimica e Biologia "A. Zambelli", Università di Salerno , Via Giovanni Paolo II 132, 84084 - Fisciano (SA), Italy
| | - Ugo Chiacchio
- Dipartimento di Scienze del Farmaco, Università di Catania , Viale Andrea Doria 6, 95125 - Catania, Italy
| | - Placido Neri
- Dipartimento di Chimica e Biologia "A. Zambelli", Università di Salerno , Via Giovanni Paolo II 132, 84084 - Fisciano (SA), Italy
| | - Antonio Rescifina
- Dipartimento di Scienze del Farmaco, Università di Catania , Viale Andrea Doria 6, 95125 - Catania, Italy
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Krishnaswamy S, Shashidhar MS, Bhadbhade MM. Intermolecular benzoyl group transfer reactivity in crystals of racemic 2,6-di-O-benzoyl-myo-inositol 1,3,5-orthobenzoate: Controlling reactivity by solvate (pseudopolymorph) formation. CrystEngComm 2011. [DOI: 10.1039/c1ce05054k] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Bardelang D, Clément JL, Finet JP, Karoui H, Tordo P. NMR Investigations of the β-Cyclodextrin Inclusion of (α-Phenyl-N-tert-butylnitrone) Analogues. J Phys Chem B 2004. [DOI: 10.1021/jp049726y] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- David Bardelang
- Laboratoire SREP, UMR 6517 CNRS et Universités d'Aix-Marseille 1 et 3, Case 521, 13397 Marseille Cedex 20, France
| | - Jean-Louis Clément
- Laboratoire SREP, UMR 6517 CNRS et Universités d'Aix-Marseille 1 et 3, Case 521, 13397 Marseille Cedex 20, France
| | - Jean-Pierre Finet
- Laboratoire SREP, UMR 6517 CNRS et Universités d'Aix-Marseille 1 et 3, Case 521, 13397 Marseille Cedex 20, France
| | - Hakim Karoui
- Laboratoire SREP, UMR 6517 CNRS et Universités d'Aix-Marseille 1 et 3, Case 521, 13397 Marseille Cedex 20, France
| | - Paul Tordo
- Laboratoire SREP, UMR 6517 CNRS et Universités d'Aix-Marseille 1 et 3, Case 521, 13397 Marseille Cedex 20, France
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