1
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Haraldsdottir H, Gudmundsson HG, Linderborg KM, Yang B, Haraldsson GG. Chemoenzymatic Synthesis of ABC-Type Enantiostructured Triacylglycerols by the Use of the p-Methoxybenzyl Protective Group. Molecules 2024; 29:1633. [PMID: 38611912 PMCID: PMC11013301 DOI: 10.3390/molecules29071633] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2024] [Revised: 03/30/2024] [Accepted: 04/03/2024] [Indexed: 04/14/2024] Open
Abstract
This report demonstrates the first asymmetric synthesis of enantiopure structured triacylglycerols (TAGs) of the ABC type presenting three non-identical fatty acids, two of which are unsaturated. The unsaturated fatty acids included monounsaturated oleic acid (C18:1 n-9) and polyunsaturated linoleic acid (C18:2 n-6). This was accomplished by a six-step chemoenzymatic approach starting from (R)- and (S)-solketals. The highly regioselective immobilized Candida antarctica lipase (CAL-B) played a crucial role in the regiocontrol of the synthesis. The synthesis also benefited from the use of the p-methoxybenzyl (PMB) ether protective group, which enabled the incorporation of two different unsaturated fatty acids into the glycerol skeleton. The total of six such TAGs were prepared, four constituting the unsaturated fatty acids in the sn-1 and sn-2 positions, with a saturated fatty acid in the remaining sn-3 position of the glycerol backbone. In the two remaining TAGs, the different unsaturated fatty acids accommodated the sn-1 and sn-3 end positions, with the saturated fatty acid present in the sn-2 position. Enantiopure TAGs are urgently demanded as standards for the enantiospecific analysis of intact TAGs in fats and oils.
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Affiliation(s)
- Hafdis Haraldsdottir
- Chemistry Department, Science Institute, University of Iceland, Dunhaga 3, 107 Reykjavik, Iceland; (H.H.); (H.G.G.)
| | - Haraldur G. Gudmundsson
- Chemistry Department, Science Institute, University of Iceland, Dunhaga 3, 107 Reykjavik, Iceland; (H.H.); (H.G.G.)
| | - Kaisa M. Linderborg
- Food Sciences, Department of Life Technologies, University of Turku, 20520 Turku, Finland; (K.M.L.); (B.Y.)
| | - Baoru Yang
- Food Sciences, Department of Life Technologies, University of Turku, 20520 Turku, Finland; (K.M.L.); (B.Y.)
| | - Gudmundur G. Haraldsson
- Chemistry Department, Science Institute, University of Iceland, Dunhaga 3, 107 Reykjavik, Iceland; (H.H.); (H.G.G.)
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2
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Gupta S, Sharma A, Mondal D, Bera S. Advancement of the Cleavage Methods of Carbohydrate-derived Isopropylidene and Cyclohexylidene Ketals. CURR ORG CHEM 2022. [DOI: 10.2174/1385272826666220426104217] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Abstract:
Carbohydrates, amino acids, and nucleosides, the fundamental building blocks of complex biomolecules in nature, are essential starting materials for the fabrication of natural and unnatural structural entities, which necessitate the masking and demasking of various functional groups with the utmost chemoselectivity, mildness, and efficiency to avoid unintended bond breaking and formation, as well as associated reactions. Ketals, benzylidene, methoxymethyl, p-methoxybenzyl, silyl ethers, trityl, tert-butyl carbamate, and other functional groups are widely used in modern organic synthesis. In carbohydrate chemistry, the commonly used protecting functionality of isopropylidene and cyclohexylidene ketals necessitates effective methods for selective cleavage. This review summarises different methods for deblocking isopropylidene and cyclohexylidene ketals using inorganic acids, Lewis acid, silica-supported inorganic acids, Amberlite-120 (H+) resin, phosphotungstic acid, Nafion-H, NaBArF4.2H2O, montmorillonite clay, Dowex 50W-X8, camphorsulphonic acid (CSA), ceric ammonium nitrate, molecular iodine, ionic liquids, zeolites and so on.
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Affiliation(s)
- Shilpi Gupta
- School of Chemical Sciences, Central University of Gujarat, Gandhinagar-382030, India
| | - Anjali Sharma
- School of Chemical Sciences, Central University of Gujarat, Gandhinagar-382030, India
| | - Dhananjoy Mondal
- School of Chemical Sciences, Central University of Gujarat, Gandhinagar-382030, India
| | - Smritilekha Bera
- School of Chemical Sciences, Central University of Gujarat, Gandhinagar-382030, India
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3
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Gerke C, Buchholz M, Müller H, Meusinger R, Grimmler M, Metzmann E. Direct glucosone-based synthesis and HILIC-ESI-MS/MS characterization of N-terminal fructosylated valine and valylhistidine for validation of enzymatic HbA 1c assays in the diagnosis of diabetes mellitus. Anal Bioanal Chem 2019; 411:7967-7979. [PMID: 31754770 PMCID: PMC6920237 DOI: 10.1007/s00216-019-02186-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2019] [Revised: 09/14/2019] [Accepted: 10/02/2019] [Indexed: 11/12/2022]
Abstract
Naturally occurring fructosamines are of high clinical significance due to their potential use in diabetes mellitus monitoring (quantification of fructosylated hemoglobin, HbA1c) or for the investigation of their reactivity in consecutive reactions and harmfulness towards the organism. Here we report the specific synthesis of the fructosylated dipeptide L-valyl-L-histidine (Fru-Val-His) and fructosylated L-valine (Fru-Val). Both are basic tools for the development and validation of enzymatic HbA1c assays. The two fructosamine derivatives were synthesized via a protected glucosone intermediate which was coupled to the primary amine of Val or Val-His, performing a reductive amination reaction. Overall yields starting from fructose were 36% and 34% for Fru-Val and Fru-Val-His, respectively. Both compounds were achieved in purities > 90%. A HILIC-ESI-MS/MS method was developed for routine analysis of the synthesized fructosamines, including starting materials and intermediates. The presented method provides a well-defined and efficient synthesis protocol with purification steps and characterization of the desired products. The functionality of the fructosylated dipeptide has been thoroughly tested in an enzymatic HbA1c assay, showing its concentration-dependent oxidative degradation by fructosyl-peptide oxidases (FPOX). Graphical abstract.
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Affiliation(s)
- Christoph Gerke
- Hochschule Fresenius, University of Applied Sciences, Limburger Straße 2, 65510, Idstein, Germany
- Department of Chemistry in Pharmaceutical Sciences, Faculty of Pharmacy, Complutense University of Madrid, Plaza de Ramón y Cajal s/n, 28040, Madrid, Spain
| | - Monika Buchholz
- Hochschule Fresenius, University of Applied Sciences, Limburger Straße 2, 65510, Idstein, Germany
| | - Holger Müller
- DiaSys Diagnostic Systems GmbH, Alte Straße 9, 65558, Holzheim, Germany
| | - Reinhard Meusinger
- Clemens-Schöpf Institute of Organic Chemistry and Biochemistry, University of Technology Darmstadt, Alarich-Weiss-Straße 4, 64287, Darmstadt, Germany
| | - Matthias Grimmler
- Hochschule Fresenius, University of Applied Sciences, Limburger Straße 2, 65510, Idstein, Germany
- DiaSys Diagnostic Systems GmbH, Alte Straße 9, 65558, Holzheim, Germany
| | - Erwin Metzmann
- Hochschule Fresenius, University of Applied Sciences, Limburger Straße 2, 65510, Idstein, Germany.
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4
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Glenister A, Simone MI, Hambley TW. A Warburg effect targeting vector designed to increase the uptake of compounds by cancer cells demonstrates glucose and hypoxia dependent uptake. PLoS One 2019; 14:e0217712. [PMID: 31306426 PMCID: PMC6629077 DOI: 10.1371/journal.pone.0217712] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2019] [Accepted: 05/16/2019] [Indexed: 11/24/2022] Open
Abstract
Glycoconjugation to target the Warburg effect provides the potential to enhance selective uptake of anticancer or imaging agents by cancer cells. A Warburg effect targeting group, rationally designed to facilitate uptake by glucose transporters and promote cellular accumulation due to phosphorylation by hexokinase (HK), has been synthesised. This targeting group, the C2 modified glucose analogue 2-(2-[2-(2-aminoethoxy)ethoxy]ethoxy)-D-glucose, has been conjugated to the fluorophore nitrobenzoxadiazole to evaluate its effect on uptake and accumulation in cancer cells. The targeting vector has demonstrated inhibition of glucose phosphorylation by HK, indicating its interaction with the enzyme and thereby confirming the potential to facilitate an intracellular trapping mechanism for compounds it is conjugated with. The cellular uptake of the fluorescent analogue is dependent on the glucose concentration and is so to a greater extent than is that of the widely used fluorescent glucose analogue, 2-NBDG. It also demonstrates selective uptake in the hypoxic regions of 3D spheroid tumour models whereas 2-NBDG is distributed primarily through the normoxic regions of the spheroid. The increased selectivity is consistent with the blocking of alternative uptake pathways.
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Affiliation(s)
- Alexandra Glenister
- School of Chemistry, University of Sydney, Camperdown, New South Wales, Australia
| | - Michela I. Simone
- Discipline of Chemistry, Priority Research Centre for Chemical Biology & Clinical Pharmacology, University of Newcastle, Callaghan, New South Wales, Australia
| | - Trevor W. Hambley
- School of Chemistry, University of Sydney, Camperdown, New South Wales, Australia
- * E-mail:
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5
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Zhang P, Ling CC. A mild acetolysis procedure for the regioselective removal of isopropylidene in di-O-isopropylidene-protected pyranoside systems. Carbohydr Res 2017; 445:7-13. [PMID: 28376356 DOI: 10.1016/j.carres.2017.03.021] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2017] [Revised: 03/27/2017] [Accepted: 03/28/2017] [Indexed: 11/19/2022]
Abstract
A mild acetolysis method for the regioselective removal of isopropylidene group from di-O-isopropylidene-protected hexopyranosides is reported. O-Isopropylidene-protected intermediates play an important role in carbohydrate chemistry, as they are often found in commercially available furanosyl and pyranosyl materials, and some of them contain more than one O-isopropylidene groups. Methods that permit regioselective removal of O-isopropylidene groups are extremely valuable, as the number of steps in the total synthesis of complex oligosaccharides could be significantly decreased. Here we report that trifluoroacetic acid (TFA)/acetic anhydride (Ac2O) can be used to regioselectively convert one of the two O-isopropylidene groups to vicinal di-O-acetates in the di-O-isopropylidene-protected galacto- and fructo-pyranosyl systems, and the reagent is compatible with some common functionalities such as sulfonate esters, bromide, azide etc.
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Affiliation(s)
- Pengfei Zhang
- Alberta Glycomics Centre, Department of Chemistry, University of Calgary, Calgary, Alberta, T2N 1N4, Canada
| | - Chang-Chun Ling
- Alberta Glycomics Centre, Department of Chemistry, University of Calgary, Calgary, Alberta, T2N 1N4, Canada.
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6
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Synthesis and glycosidase inhibition evaluation of (3S,4S)-3-((R)-1,2-dihydroxyethyl)pyrrolidine-3,4-diol. Carbohydr Res 2016; 434:33-36. [PMID: 27563841 DOI: 10.1016/j.carres.2016.08.003] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2016] [Revised: 07/26/2016] [Accepted: 08/02/2016] [Indexed: 11/22/2022]
Abstract
A new azasugar (3S,4S)-3-((R)-1,2-dihydroxyethyl)pyrrolidine-3,4-diol (1) was obtained from commercially available d-glucose using one-pot reductive cyclization as a key step. The target product, i.e., the iminosugar isomer, was obtained in 10 steps and 24.3% overall yield. Only three column chromatography purifications were needed in this synthesis. The biological activity of the target molecule as glycosidase inhibitor was studied, but the inhibitory activity against four glycosidases was not good (IC50 > 100 μM).
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7
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Froese J, Overbeeke C, Hudlicky T. Chemoenzymatic Synthesis of Pleiogenone A: An Antiproliferative Trihydroxyalkylcyclohexenone Isolated from Pleiogynium timorense. Chemistry 2016; 22:6180-4. [PMID: 26956129 DOI: 10.1002/chem.201601061] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2016] [Indexed: 02/01/2023]
Abstract
The first total synthesis of polyhydroxylated cyclohexenone 1, isolated from Pleiogynium timorense and named pleiogenone A, is reported that also serves as a proof of structure and absolute configuration. Enzymatic dihydroxylation of benzoic acid with R. eutrophus B9 provided enantiomerically pure diene diol 6. Elaboration of the carboxylate moiety to the alkyl side chain was followed by singlet oxygen cycloaddition to furnish an endoperoxide whose reduction with thiourea led to cyclitol 19. Several protective operations were required before oxidation and the final extension of the side chain by a Wittig reaction. After final deprotection of the acetonide functionality the desired pleiogenone A (1) was obtained in 14 operations from benzoic acid.
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Affiliation(s)
- Jordan Froese
- Chemistry Department and Centre for Biotechnology, Brock University, 500 Glenridge Avenue, St. Catharines, L2S 3A1, Ontario, Canada
| | - Cameron Overbeeke
- Chemistry Department and Centre for Biotechnology, Brock University, 500 Glenridge Avenue, St. Catharines, L2S 3A1, Ontario, Canada
| | - Tomas Hudlicky
- Chemistry Department and Centre for Biotechnology, Brock University, 500 Glenridge Avenue, St. Catharines, L2S 3A1, Ontario, Canada.
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8
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Salamone S, Guerreiro C, Cambon E, Hargreaves JM, Tarrat N, Remaud-Siméon M, André I, Mulard LA. Investigation on the Synthesis of Shigella flexneri Specific Oligosaccharides Using Disaccharides as Potential Transglucosylase Acceptor Substrates. J Org Chem 2015; 80:11237-57. [PMID: 26340432 DOI: 10.1021/acs.joc.5b01407] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
Chemo-enzymatic strategies hold great potential for the development of stereo- and regioselective syntheses of structurally defined bioactive oligosaccharides. Herein, we illustrate the potential of the appropriate combination of a planned chemo-enzymatic pathway and an engineered biocatalyst for the multistep synthesis of an important decasaccharide for vaccine development. We report the stepwise investigation, which led to an efficient chemical conversion of allyl α-d-glucopyranosyl-(1→4)-α-l-rhamnopyranosyl-(1→3)-2-deoxy-2-trichloroacetamido-β-d-glucopyranoside, the product of site-specific enzymatic α-d-glucosylation of a lightly protected non-natural disaccharide acceptor, into a pentasaccharide building block suitable for chain elongation at both ends. Successful differentiation between hydroxyl groups features the selective acylation of primary alcohols and acetalation of a cis-vicinal diol, followed by a controlled per-O-benzylation step. Moreover, we describe the successful use of the pentasaccharide intermediate in the [5 + 5] synthesis of an aminoethyl aglycon-equipped decasaccharide, corresponding to a dimer of the basic repeating unit from the O-specific polysaccharide of Shigella flexneri 2a, a major cause of bacillary dysentery. Four analogues of the disaccharide acceptor were synthesized and evaluated to reach a larger repertoire of O-glucosylation patterns encountered among S. flexneri type-specific polysaccharides. New insights on the potential and limitations of planned chemo-enzymatic pathways in oligosaccharide synthesis are provided.
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Affiliation(s)
- Stéphane Salamone
- Institut Pasteur , Unité de Chimie des Biomolécules, 28 rue du Dr Roux, 75724, Paris Cedex 15 France.,CNRS UMR 3523, Institut Pasteur , 75015 Paris, France
| | - Catherine Guerreiro
- Institut Pasteur , Unité de Chimie des Biomolécules, 28 rue du Dr Roux, 75724, Paris Cedex 15 France.,CNRS UMR 3523, Institut Pasteur , 75015 Paris, France
| | - Emmanuelle Cambon
- Université de Toulouse , INSA,UPS,INP; LISBP, 135 Avenue de Rangueil, 31077 Toulouse, France.,CNRS, UMR5504 , F-31400 Toulouse, France.,INRA, UMR792 Ingénierie des Systèmes Biologiques et des Procédés , F-31400 Toulouse, France
| | - Jason M Hargreaves
- Institut Pasteur , Unité de Chimie des Biomolécules, 28 rue du Dr Roux, 75724, Paris Cedex 15 France.,CNRS UMR 3523, Institut Pasteur , 75015 Paris, France
| | - Nathalie Tarrat
- Université de Toulouse , INSA,UPS,INP; LISBP, 135 Avenue de Rangueil, 31077 Toulouse, France.,CNRS, UMR5504 , F-31400 Toulouse, France.,INRA, UMR792 Ingénierie des Systèmes Biologiques et des Procédés , F-31400 Toulouse, France
| | - Magali Remaud-Siméon
- Université de Toulouse , INSA,UPS,INP; LISBP, 135 Avenue de Rangueil, 31077 Toulouse, France.,CNRS, UMR5504 , F-31400 Toulouse, France.,INRA, UMR792 Ingénierie des Systèmes Biologiques et des Procédés , F-31400 Toulouse, France
| | - Isabelle André
- Université de Toulouse , INSA,UPS,INP; LISBP, 135 Avenue de Rangueil, 31077 Toulouse, France.,CNRS, UMR5504 , F-31400 Toulouse, France.,INRA, UMR792 Ingénierie des Systèmes Biologiques et des Procédés , F-31400 Toulouse, France
| | - Laurence A Mulard
- Institut Pasteur , Unité de Chimie des Biomolécules, 28 rue du Dr Roux, 75724, Paris Cedex 15 France.,CNRS UMR 3523, Institut Pasteur , 75015 Paris, France
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9
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Fukuyama K, Ohrui H, Kuwahara S. Synthesis of EFdA via a Diastereoselective Aldol Reaction of a Protected 3-Keto Furanose. Org Lett 2015; 17:828-31. [DOI: 10.1021/ol5036535] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Kei Fukuyama
- Laboratory
of Applied Bioorganic Chemistry, Graduate School of Agricultural Science, Tohoku University, Tsutsumidori-Amamiyamachi, Aoba-ku, Sendai 981-8555, Japan
| | - Hiroshi Ohrui
- Yokohama University of Pharmacy, 601 Matano-cho, Totsuka-ku, Yokohama 245-0066, Japan
| | - Shigefumi Kuwahara
- Laboratory
of Applied Bioorganic Chemistry, Graduate School of Agricultural Science, Tohoku University, Tsutsumidori-Amamiyamachi, Aoba-ku, Sendai 981-8555, Japan
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10
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Reddy DS, Padhi B, Mohapatra DK. Highly Stereocontrolled Synthesis of trans-2,6-Disubstituted-5-methyl-3,6-dihydropyrans: Stereoselective Synthesis of the Bicyclic Core of Penostatin B. J Org Chem 2015; 80:1365-74. [DOI: 10.1021/jo502101u] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- D. Srinivas Reddy
- Natural Products Chemistry Division, CSIR−Indian Institute of Chemical Technology, Hyderabad 500 007, India
| | - Birakishore Padhi
- Natural Products Chemistry Division, CSIR−Indian Institute of Chemical Technology, Hyderabad 500 007, India
| | - Debendra K. Mohapatra
- Natural Products Chemistry Division, CSIR−Indian Institute of Chemical Technology, Hyderabad 500 007, India
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11
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Karamthulla S, Khan MN, Choudhury LH. Microwave-assisted synthesis of novel 2,3-disubstituted imidazo[1,2-a]pyridines via one-pot three component reactions. RSC Adv 2015. [DOI: 10.1039/c4ra16298f] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
An expeditious one-pot, metal-free, three-component reaction of arylglyoxals, cyclic 1,3-dicarbonyls and 2-aminopyridines in the presence of molecular iodine under microwave irradiation is reported.
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Affiliation(s)
- Shaik Karamthulla
- Department of Chemistry
- Indian Institute of Technology Patna
- Patna-800013
- India
| | - Md. Nasim Khan
- Department of Chemistry
- Indian Institute of Technology Patna
- Patna-800013
- India
| | - Lokman H. Choudhury
- Department of Chemistry
- Indian Institute of Technology Patna
- Patna-800013
- India
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12
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Iodine-catalyzed N-alkylation of tosylhydrazones with benzylic alcohols. JOURNAL OF THE IRANIAN CHEMICAL SOCIETY 2013. [DOI: 10.1007/s13738-012-0205-1] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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13
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Xiong J, Yan S, Ding N, Zhang W, Li Y. Ultrasound-Assisted Selective Deprotection of Terminal Acetonides Catalyzed by Silica-Supported Boron Trifluoride. J Carbohydr Chem 2013. [DOI: 10.1080/07328303.2012.762980] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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14
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Balbuena P, Gonçalves-Pereira R, Jiménez Blanco JL, García-Moreno MI, Lesur D, Ortiz Mellet C, García Fernández JM. o-Xylylene protecting group in carbohydrate chemistry: application to the regioselective protection of a single vic-diol segment in cyclodextrins. J Org Chem 2013; 78:1390-403. [PMID: 23336396 DOI: 10.1021/jo302178f] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A systematic study of the suitability of α,α'-dibromo-o-xylene as a reagent for cyclic o-xylylene protection of vic-diols in different monosaccharide substrates is reported. The installation of this protecting group, formally equivalent to a di-O-benzylation reaction, proceeds with good regioselectivity toward 1,2-trans-diequatorial diol systems in pyranose and furanose rings. Initially, the benzyl ether-type derivative of the more acidic hydroxyl is preferentially formed. Subsequent intramolecular etherification toward the equatorial-oriented vicinal OH is kinetically favored. The methodology has been implemented for the simultaneous protection of the secondary O-2 and O-3 positions of a single d-glucopyranosyl unit in cyclic oligosaccharides of the cyclodextrin (CD) family (cyclomaltohexa-, -hepta-, and -octaose; α, β, and γCD).
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Affiliation(s)
- Patricia Balbuena
- Instituto de Investigaciones Químicas, CSIC-Universidad de Sevilla, c/Américo Vespucio 49, Isla de la Cartuja, E-41092 Sevilla, Spain
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15
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Duan Y, Chen MW, Chen QA, Yu CB, Zhou YG. Pd-Catalyzed asymmetric hydrogenation of 3-(toluenesulfonamidoalkyl)indoles. Org Biomol Chem 2012; 10:1235-8. [DOI: 10.1039/c1ob06777j] [Citation(s) in RCA: 64] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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16
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Vanlaldinpuia K, Bez G. Useful methods for the synthesis of isopropylidenes and their chemoselective cleavage. Tetrahedron Lett 2011. [DOI: 10.1016/j.tetlet.2011.05.050] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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17
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Molecular iodine-catalyzed and air-mediated tandem synthesis of quinolines via three-component reaction of amines, aldehydes, and alkynes. Tetrahedron 2011. [DOI: 10.1016/j.tet.2011.03.087] [Citation(s) in RCA: 86] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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18
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Jereb M, Vražič D, Zupan M. Iodine-catalyzed transformation of molecules containing oxygen functional groups. Tetrahedron 2011. [DOI: 10.1016/j.tet.2010.11.086] [Citation(s) in RCA: 134] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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19
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Jiang R, Xu HY, Xu XP, Chu XQ, Ji SJ. Direct alkylation of indoles and amines by tert-enamides: facile access to pharmaceutically active 2-oxo-1-pyrrolidine analogues. Org Biomol Chem 2011; 9:5659-69. [DOI: 10.1039/c1ob05546a] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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20
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Pascariu MC, Mircea Rusnac L. Selective deprotection of tethered glycoderivatives with unsaturated spacer. HETEROCYCL COMMUN 2011. [DOI: 10.1515/hc.2011.022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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21
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Emer E, Sinisi R, Capdevila MG, Petruzziello D, De Vincentiis F, Cozzi PG. Direct Nucleophilic S
N
1‐Type Reactions of Alcohols. European J Org Chem 2010. [DOI: 10.1002/ejoc.201001474] [Citation(s) in RCA: 260] [Impact Index Per Article: 18.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Affiliation(s)
- Enrico Emer
- ALMA MATER STUDIORUM, Università di Bologna, Dipartimento di Chimica “G. Ciamician”, via Selmi 2, 40126, Bologna, Italy, Fax: +39‐051‐2099456
| | - Riccardo Sinisi
- ALMA MATER STUDIORUM, Università di Bologna, Dipartimento di Chimica “G. Ciamician”, via Selmi 2, 40126, Bologna, Italy, Fax: +39‐051‐2099456
| | - Montse Guiteras Capdevila
- ALMA MATER STUDIORUM, Università di Bologna, Dipartimento di Chimica “G. Ciamician”, via Selmi 2, 40126, Bologna, Italy, Fax: +39‐051‐2099456
| | - Diego Petruzziello
- ALMA MATER STUDIORUM, Università di Bologna, Dipartimento di Chimica “G. Ciamician”, via Selmi 2, 40126, Bologna, Italy, Fax: +39‐051‐2099456
| | - Francesco De Vincentiis
- ALMA MATER STUDIORUM, Università di Bologna, Dipartimento di Chimica “G. Ciamician”, via Selmi 2, 40126, Bologna, Italy, Fax: +39‐051‐2099456
| | - Pier Giorgio Cozzi
- ALMA MATER STUDIORUM, Università di Bologna, Dipartimento di Chimica “G. Ciamician”, via Selmi 2, 40126, Bologna, Italy, Fax: +39‐051‐2099456
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Gharpure SJ, Reddy SRB. Tandem SN2-Michael addition to vinylogous carbonates for the stereoselective construction of 2,3,3,5-tetrasubstituted tetrahydrofurans. Tetrahedron Lett 2010. [DOI: 10.1016/j.tetlet.2010.09.008] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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23
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Molecular iodine-catalyzed C3-alkylation of 4-hydroxycoumarins with secondary benzyl alcohols. Tetrahedron 2009. [DOI: 10.1016/j.tet.2009.09.007] [Citation(s) in RCA: 55] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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24
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Lin X, Wang J, Xu F, Wang Y. Molecular iodine-catalysed amidation reaction of secondary benzylic and allylic alcohols with carboxamides or sulfonamides. JOURNAL OF CHEMICAL RESEARCH 2009. [DOI: 10.3184/030823409x12526892025900] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
A highly efficient method for the C–N bond formation via 2 mol% of molecular iodine-catalysed amidation reaction of benzylic and allylic alcohols with carboxamides or sulfonamides in MeCN is described, giving the corresponding substituted amides and allylic amides in moderate to excellent yields. The significan features of the procedure include mild and metal-free reaction conditions, operational simplicity, inexpensive reagents, short reaction time, and good yields.
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Affiliation(s)
- Xufeng Lin
- Department of Chemistry, Zhejiang University, Hangzhou 310027, P. R. China
| | - Jun Wang
- Department of Chemistry, Zhejiang University, Hangzhou 310027, P. R. China
| | - Fangxi Xu
- Department of Chemistry, Zhejiang University, Hangzhou 310027, P. R. China
| | - Yanguang Wang
- Department of Chemistry, Zhejiang University, Hangzhou 310027, P. R. China
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25
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Wang J, Xu FX, Lin XF, Wang YG. Molecular iodine-catalyzed diastereoselective synthesis of cis-fused pyranobenzopyrans and furanobenzopyrans. Tetrahedron Lett 2008. [DOI: 10.1016/j.tetlet.2008.06.024] [Citation(s) in RCA: 47] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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26
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Zeolite catalyzed selective deprotection of di- and tri-O-isopropylidene sugar acetals. Carbohydr Res 2008; 343:1801-7. [DOI: 10.1016/j.carres.2008.05.006] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2008] [Revised: 04/25/2008] [Accepted: 05/04/2008] [Indexed: 11/24/2022]
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27
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Iodine as a mild and versatile reagent for the synthesis of 1,3-dioxane derivatives via the Prins reaction. Tetrahedron Lett 2008. [DOI: 10.1016/j.tetlet.2008.05.014] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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28
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Facile synthesis of α-iodo carbonyl compounds and α-iodo dimethyl ketals using molecular iodine and trimethylorthoformate. Tetrahedron Lett 2008. [DOI: 10.1016/j.tetlet.2008.03.151] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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29
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Selvam NP, Perumal PT. A simple and efficient method for the synthesis of amidophenols using iodine as catalyst under neat condition. Tetrahedron 2008. [DOI: 10.1016/j.tet.2008.01.075] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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31
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Zhang Z, Lin J. Efficient and Convenient Method for the Synthesis of Symmetrical Triindolylmethanes Catalyzed by Iodine. SYNTHETIC COMMUN 2007. [DOI: 10.1080/00397910601031652] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- Zhan‐Hui Zhang
- a College of Chemistry and Material Science, Hebei Normal University , Shijiazhuang, China
| | - Jin Lin
- a College of Chemistry and Material Science, Hebei Normal University , Shijiazhuang, China
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32
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Chemoselective hydrolysis of tert-butyl esters in acetonitrile using molecular iodine as a mild and efficient catalyst. Tetrahedron Lett 2006. [DOI: 10.1016/j.tetlet.2006.05.011] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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33
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Lin XF, Cui SL, Wang YG. Molecular iodine-catalyzed one-pot synthesis of substituted quinolines from imines and aldehydes. Tetrahedron Lett 2006. [DOI: 10.1016/j.tetlet.2006.02.136] [Citation(s) in RCA: 97] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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