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Gupta S, Bera S, Mondal D. Nascent-HBr-Catalyzed Removal of Orthogonal Protecting Groups in Aqueous Surfactants. J Org Chem 2020; 85:2635-2645. [PMID: 31875403 DOI: 10.1021/acs.joc.9b02561] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Organic reactions in the aqueous environment have recently emerged as a promising research area. The generation of nascent-HBr from the slow hydrolysis of the dispersed catalyst, benzyl bromide, with the interior water present in the hydrophobic core of the confined micellar medium in aqueous surfactant is described for the first time. The sustained-release nascent-HBr enabled the chemoselective cleavages of acid-sensitive orthogonal functionalities present in carbohydrates, amino alcohols, and hydroxylated acyclic compounds in good to excellent yields.
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Affiliation(s)
- Shilpi Gupta
- School of Chemical Sciences , Central University of Gujarat , Gandhinagar - 382030 , India
| | - Smritilekha Bera
- School of Chemical Sciences , Central University of Gujarat , Gandhinagar - 382030 , India
| | - Dhananjoy Mondal
- School of Chemical Sciences , Central University of Gujarat , Gandhinagar - 382030 , India
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2
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Pino-Gonzalez MS, Romero-Carrasco A, Calvo-Losada S, Oña-Bernal N, Quirante JJ, Sarabia F. Synthesis of tetrazole fused azepanes and quantum chemical topology study on the mechanism of the intramolecular cycloaddition reaction. RSC Adv 2017. [DOI: 10.1039/c7ra10899k] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
Syntheses of novel tetrazolo azepanes by intramolecular 1,3-dipolar cycloaddition are described. Cyclization mechanistic topology study showed a pseudo concerted mechanism.
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Affiliation(s)
| | - A. Romero-Carrasco
- Department of Organic Chemistry
- Faculty of Sciences
- University of Málaga
- Spain
| | - S. Calvo-Losada
- Department of Physical Chemistry
- Faculty of Sciences
- University of Málaga
- Spain
| | - N. Oña-Bernal
- Department of Organic Chemistry
- Faculty of Sciences
- University of Málaga
- Spain
| | - J. J. Quirante
- Department of Physical Chemistry
- Faculty of Sciences
- University of Málaga
- Spain
| | - F. Sarabia
- Department of Organic Chemistry
- Faculty of Sciences
- University of Málaga
- Spain
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3
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Lumbroso A, Coeffard V, Gatineau D, Stecko S, Beaudet I, Quintard JP, Le Grognec E. Stereoselective Synthesis of Stannylated Dehydropiperidines and Dehydroazepanes. European J Org Chem 2016. [DOI: 10.1002/ejoc.201600903] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Affiliation(s)
- Alexandre Lumbroso
- Université de Nantes; CNRS; Chimie et Interdisciplinarité: Synthèse, Analyse, Modélisation (CEISAM); UMR CNRS 6230; UFR des Sciences et des Techniques; 2 rue de la Houssinière, BP 92208 44322 Nantes Cedex 3 France
| | - Vincent Coeffard
- Université de Nantes; CNRS; Chimie et Interdisciplinarité: Synthèse, Analyse, Modélisation (CEISAM); UMR CNRS 6230; UFR des Sciences et des Techniques; 2 rue de la Houssinière, BP 92208 44322 Nantes Cedex 3 France
| | - David Gatineau
- Université de Nantes; CNRS; Chimie et Interdisciplinarité: Synthèse, Analyse, Modélisation (CEISAM); UMR CNRS 6230; UFR des Sciences et des Techniques; 2 rue de la Houssinière, BP 92208 44322 Nantes Cedex 3 France
| | - Sebastian Stecko
- Institute of Organic Chemistry; Polish Academy of Sciences; Kasprzaka 44/52 01-224 Warsaw Poland
| | - Isabelle Beaudet
- Université de Nantes; CNRS; Chimie et Interdisciplinarité: Synthèse, Analyse, Modélisation (CEISAM); UMR CNRS 6230; UFR des Sciences et des Techniques; 2 rue de la Houssinière, BP 92208 44322 Nantes Cedex 3 France
| | - Jean-Paul Quintard
- Université de Nantes; CNRS; Chimie et Interdisciplinarité: Synthèse, Analyse, Modélisation (CEISAM); UMR CNRS 6230; UFR des Sciences et des Techniques; 2 rue de la Houssinière, BP 92208 44322 Nantes Cedex 3 France
| | - Erwan Le Grognec
- Université de Nantes; CNRS; Chimie et Interdisciplinarité: Synthèse, Analyse, Modélisation (CEISAM); UMR CNRS 6230; UFR des Sciences et des Techniques; 2 rue de la Houssinière, BP 92208 44322 Nantes Cedex 3 France
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4
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Jagadeesh Y, Tran AT, Luo B, Auberger N, Désiré J, Nakagawa S, Kato A, Zhang Y, Sollogoub M, Blériot Y. γ-Aminoalcohol rearrangement applied to pentahydroxylated azepanes provides pyrrolidines epimeric to homoDMDP. Org Biomol Chem 2015; 13:3446-56. [PMID: 25666467 DOI: 10.1039/c5ob00050e] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A series of pentahydroxylated pyrrolidines, displaying five contiguous stereogenic centres and epimeric to α-glucosidase inhibitor homoDMDP, have been synthesized. The key step involves a γ-aminoalcohol rearrangement applied to polyhydroxylated azepanes. These five-membered iminosugars demonstrate micromolar inhibition of glycosidases.
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Affiliation(s)
- Y Jagadeesh
- Glycochemistry Group of "Organic Synthesis" Team, Université de Poitiers, UMR-CNRS 7285 IC2MP, 4 rue Michel Brunet, 86073 Poitiers Cedex 9, France.
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A stereoselective transformation of (−)-shikimic acid into (3R,4S,5R,7R)-7-(hydroxymethyl)azepane-3,4,5-triol, a potential glycosidase inhibitor. ACTA ACUST UNITED AC 2015. [DOI: 10.1016/j.tetasy.2015.02.005] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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6
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Taghzouti H, Goumain S, Harakat D, Portella C, Behr JB, Plantier-Royon R. Synthesis of 2-carboxymethyl polyhydroxyazepanes and their evaluation as glycosidase inhibitors. Bioorg Chem 2014; 58:11-7. [PMID: 25462622 DOI: 10.1016/j.bioorg.2014.11.003] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2014] [Revised: 10/30/2014] [Accepted: 11/04/2014] [Indexed: 01/06/2023]
Abstract
A series of diastereomeric tetrahydroxylated azepanes featuring a carboxymethyl group at the pseudo-anomeric position have been synthesized from a common unsaturated intermediate. Syn- and anti-dihydroxylation reactions were achieved to yield the target compounds after efficient one-step deprotection of carbamate, ester and acetonide groups simultaneously. Screening of these polyhydroxylated azepanes toward a range of commercially available glycosidases was performed and one of the stereoisomers showed potent and selective inhibition toward β-galactosidase (IC50=21 μM).
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Affiliation(s)
- Hanaa Taghzouti
- Université de Reims Champagne-Ardenne, Institut de Chimie Moléculaire de Reims (ICMR), CNRS UMR 7312, UFR Sciences Exactes et Naturelles, BP 1039, F-51687 Reims Cedex 2, France
| | - Sophie Goumain
- Université de Reims Champagne-Ardenne, Institut de Chimie Moléculaire de Reims (ICMR), CNRS UMR 7312, UFR Sciences Exactes et Naturelles, BP 1039, F-51687 Reims Cedex 2, France
| | - Dominique Harakat
- Université de Reims Champagne-Ardenne, Institut de Chimie Moléculaire de Reims (ICMR), CNRS UMR 7312, UFR Sciences Exactes et Naturelles, BP 1039, F-51687 Reims Cedex 2, France
| | - Charles Portella
- Université de Reims Champagne-Ardenne, Institut de Chimie Moléculaire de Reims (ICMR), CNRS UMR 7312, UFR Sciences Exactes et Naturelles, BP 1039, F-51687 Reims Cedex 2, France
| | - Jean-Bernard Behr
- Université de Reims Champagne-Ardenne, Institut de Chimie Moléculaire de Reims (ICMR), CNRS UMR 7312, UFR Sciences Exactes et Naturelles, BP 1039, F-51687 Reims Cedex 2, France.
| | - Richard Plantier-Royon
- Université de Reims Champagne-Ardenne, Institut de Chimie Moléculaire de Reims (ICMR), CNRS UMR 7312, UFR Sciences Exactes et Naturelles, BP 1039, F-51687 Reims Cedex 2, France.
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7
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El-Nezhawy AOH, Biuomy AR, Hassan FS, Ismaiel AK, Omar HA. Design, synthesis and pharmacological evaluation of omeprazole-like agents with anti-inflammatory activity. Bioorg Med Chem 2013; 21:1661-70. [PMID: 23453216 DOI: 10.1016/j.bmc.2013.01.070] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2012] [Revised: 01/19/2013] [Accepted: 01/28/2013] [Indexed: 01/08/2023]
Abstract
A new series of novel benzimidazole derivatives containing substituted pyrid-2-yl moiety and polyhydroxy sugar conjugated to the N-benzimidazole moiety has been synthesized and evaluated as orally bioavailable anti-inflammatory agents with anti-ulcerogenic activity. The anti-inflammatory and anti-ulcerogenic activities of these compounds were compared to diclofenac and omeprazole, respectively. In carrageenan-induced paw oedema assay, 2-methyl-N-((3,4-dimethoxypyridin-2-yl)methyl)-1H-benzimidazol-5-amine (12d) and 1-(1,2,3,5-tetrahydroxy-α-D-mannofuranose)-5-(((3,4-dimethoxypyridin-2yl)methyl)amino)-2-methyl-1H-benzimidazole (15d) displayed dose-dependent anti-inflammatory activities by decreasing the inflammation by 62% and 72%, respectively which is comparable to that of diclofenac (73%). In contrast to diclofenac, the anti-inflammatory activity of these compounds was not only free from any side effects on the gastric mucosa but also showed significant anti-ulcerogenic activity in rat pyloric ligation and ethanol-induced gastric ulcer models similar to that of omeprazole. Together, these findings suggest that 12d and 15d are potent anti-inflammatory agents with concurrent anti-ulcerogenic activity and support its clinical promise as a component of therapeutic strategies for inflammation, for which the gastric side effects are always a major limitation.
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Affiliation(s)
- Ahmed O H El-Nezhawy
- Department of Pharmaceutical Chemistry, College of Pharmacy, Taif University, Saudi Arabia.
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8
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Oña N, Romero-Carrasco A, Pino-González MS. Regioselective epoxide opening of epoxyamides derived from d-glucose. Cyclization approaches to azepanes. ACTA ACUST UNITED AC 2013. [DOI: 10.1016/j.tetasy.2012.12.005] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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9
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Convenient strategy for the synthesis of highly functionalizable hydroxylated unsaturated azepanes. Tetrahedron Lett 2012. [DOI: 10.1016/j.tetlet.2012.06.053] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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10
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Kelebekli L, Balcı N, Şahin E. Oxazolidinone polycyclitols. Stereospecific synthesis of novel aminocarbasugars with oxazolidinone ring. Tetrahedron 2012. [DOI: 10.1016/j.tet.2011.12.078] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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11
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Jenkinson SF, Oña N, Romero A, Fleet GWJ, Thompson AL, Pino-González MS. 6-Azido-3-O-benzyl-6-de-oxy-N,N-diethyl-1,2-O-isopropyl-idene-d-glycero-α-d-gluco-heptofuran-uronamide. Acta Crystallogr Sect E Struct Rep Online 2010; 67:o38-9. [PMID: 21522748 PMCID: PMC3050294 DOI: 10.1107/s1600536810048944] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2010] [Accepted: 11/23/2010] [Indexed: 11/10/2022]
Abstract
Reaction of 3-O-benzyl-1,2-O-isopropyl-idene-α-xylo-pentodialdo-1,4-furan-ose with N,N-diethyl-2-(dimethyl-sulfuranil-idene)acetamide gave stereoselectively an ep-oxy-amide, which was regioselectively opened by NaN(3) in dimethyl formamide to give the title compound, C(21)H(30)N(4)O(6). X-ray crystallography confirmed the relative stereochemistry of the title compound and the absolute configuration was determined by the use of d-glucose as the starting material. There are two mol-ecules in the asymmetric unit (Z' = 2). The crystal structure consists of two types of chains of O-H⋯O hydrogen-bonded mol-ecules running parallel to the b axis, with each mol-ecule acting as a donor and acceptor of one hydrogen bond.
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Affiliation(s)
- S. F. Jenkinson
- Department of Organic Chemistry, Chemistry Research Laboratory, University of Oxford, Oxford OX1 3TA, England
| | - N. Oña
- Dpto. Química Orgánica, Facultad de Ciencias, Universidad de Málaga, 29071 Málaga, Spain
| | - A. Romero
- Dpto. Química Orgánica, Facultad de Ciencias, Universidad de Málaga, 29071 Málaga, Spain
| | - G. W. J. Fleet
- Department of Organic Chemistry, Chemistry Research Laboratory, University of Oxford, Oxford OX1 3TA, England
| | - A. L. Thompson
- Department of Chemical Crystallography, Chemistry Research, Laboratory, University of Oxford, Oxford OX1 3TA, England
| | - M. S. Pino-González
- Dpto. Química Orgánica, Facultad de Ciencias, Universidad de Málaga, 29071 Málaga, Spain
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