1
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Yan S, Wu L, Li S, Guo W. Triflic Acid Adsorbed on Silica Gel as an Efficient Catalyst for O-Isopropylidenation of Sugar Derivatives. HETEROCYCLES 2022. [DOI: 10.3987/com-22-14621] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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2
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Sunazuka T, Hirose T, Ikeda A, Tsutsui A, Ōmura S. Rapid Exploration of Novel Anthelmintic Agents from Alkyne-Bearing Avermectin Derivatives via Click Chemistry. HETEROCYCLES 2020. [DOI: 10.3987/com-19-s(f)18] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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3
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Kundu M, Misra AK. Selective acetolysis of primary benzyl groups in carbohydrate derivatives under the mild reaction condition. Carbohydr Res 2019; 486:107830. [PMID: 31627048 DOI: 10.1016/j.carres.2019.107830] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2019] [Revised: 09/26/2019] [Accepted: 10/02/2019] [Indexed: 11/27/2022]
Abstract
Selective acetolysis of the primary benzyloxy groups in a wide variety of carbohydrate derivatives was achieved in excellent yield using acetic anhydride and perchloric acid supported over silica (HClO4-SiO2) as a solid acid catalyst in a fast reaction condition without using any organic solvent. The reaction condition is significantly rapid and can be scaled up for its use in the multi-step oligosaccharide synthesis.
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Affiliation(s)
- Monalisa Kundu
- Bose Institute, Division of Molecular Medicine, P-1/12, C.I.T. Scheme VII-M, Kolkata, 700054, India
| | - Anup Kumar Misra
- Bose Institute, Division of Molecular Medicine, P-1/12, C.I.T. Scheme VII-M, Kolkata, 700054, India.
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4
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Affiliation(s)
- Michael Martin Nielsen
- Department of Chemistry, University of Copenhagen, Universitetsparken 5, 2100 Copenhagen, Denmark
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5
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Kumar MS, Sriram YH, Venkateswarlu M, Rajanna KC, Sudhakar MS, Venkanna P, Saiprakash PK. Silica-supported perchloric acid and potassium bisulfate as reusable green catalysts for nitration of aromatics under solvent-free microwave conditions. SYNTHETIC COMMUN 2017. [DOI: 10.1080/00397911.2017.1387923] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- M. Satish Kumar
- Department of Chemistry, Osmania University, Hyderabad, Telangana, India
| | - Y. Hemanth Sriram
- Department of Chemistry, Osmania University, Hyderabad, Telangana, India
| | - M. Venkateswarlu
- Department of Chemistry, Osmania University, Hyderabad, Telangana, India
| | - K. C. Rajanna
- Department of Chemistry, Osmania University, Hyderabad, Telangana, India
| | - M. Sai Sudhakar
- Department of Chemistry, BITS Pilani, Hyderabad, Telangana, India
| | - Purugula Venkanna
- Department of Chemistry, Osmania University, Hyderabad, Telangana, India
| | - P. K. Saiprakash
- Department of Chemistry, Osmania University, Hyderabad, Telangana, India
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6
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Abstract
The development of glycobiology relies on the sources of particular oligosaccharides in their purest forms. As the isolation of the oligosaccharide structures from natural sources is not a reliable option for providing samples with homogeneity, chemical means become pertinent. The growing demand for diverse oligosaccharide structures has prompted the advancement of chemical strategies to stitch sugar molecules with precise stereo- and regioselectivity through the formation of glycosidic bonds. This Review will focus on the key developments towards chemical O-glycosylations in the current century. Synthesis of novel glycosyl donors and acceptors and their unique activation for successful glycosylation are discussed. This Review concludes with a summary of recent developments and comments on future prospects.
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Affiliation(s)
- Rituparna Das
- Department of Chemical SciencesIndian Institute of Science Education and Research (IISER) KolkataMohanpurNadia741246India
| | - Balaram Mukhopadhyay
- Department of Chemical SciencesIndian Institute of Science Education and Research (IISER) KolkataMohanpurNadia741246India
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7
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Si A, Misra AK. Synthesis of a pentasaccharide repeating unit corresponding to the cell wall O-antigen of Escherichia coli O59 using iterative glycosylations in one pot. Tetrahedron 2016. [DOI: 10.1016/j.tet.2016.06.025] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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8
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MCM-41 supported perchloric acid for efficient synthesis of 3,4-dihydropyrimidin-2-(1H)-ones via Biginelli reaction. MONATSHEFTE FUR CHEMIE 2015. [DOI: 10.1007/s00706-015-1468-x] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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9
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Kaur M, Sharma S, Bedi PM. Silica supported Brönsted acids as catalyst in organic transformations: A comprehensive review. CHINESE JOURNAL OF CATALYSIS 2015. [DOI: 10.1016/s1872-2067(14)60299-0] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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10
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Dara S, Saikam V, Yadav M, Singh PP, Vishwakarma RA. HClO4–silica-catalysed regioselective opening of benzylidene acetals and its application towards regioselective HO-4 glycosylation of benzylidene acetals in one-pot. Carbohydr Res 2014; 391:93-6. [DOI: 10.1016/j.carres.2014.01.011] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2013] [Revised: 01/11/2014] [Accepted: 01/13/2014] [Indexed: 12/01/2022]
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11
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Huang H, Han L, Lan YM, Zhang LL. One-pot synthesis of a 3,6-branched hexaarabinogalactan using galactopyranosyl thioglycoside diol as a key glycosylating agent. JOURNAL OF ASIAN NATURAL PRODUCTS RESEARCH 2014; 16:640-647. [PMID: 24873750 DOI: 10.1080/10286020.2014.917084] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/23/2013] [Accepted: 04/17/2014] [Indexed: 06/03/2023]
Abstract
We present in this paper the efficient four-component one-pot synthesis of a fully protected hexaarabinogalactan 2 with di-branched structure by using D-thiogalactopyranoside 3,6-diol 3 as the central glycosylating agent. After global deprotection, 2 was converted into the 3-aminopropyl linker-containing free oligosaccharide 1 that is structurally related to ALR-5IIa-1-1, an arabino-3,6-galactan with intestinal immune system modulating activity.
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Affiliation(s)
- Hong Huang
- a Department of Pharmacy , Evidence-Based Pharmacy Center, West China Second University Hospital, Sichuan University , Chengdu 610041 , China
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12
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Khan AT, Khan MM, Das DK, Lal M. Silica-Supported Perchloric Acid (HClO4-SiO2): An Efficient Catalyst for One-Pot Synthesis of Functionalized Tetrahydropyrimidine Derivatives. J Heterocycl Chem 2012. [DOI: 10.1002/jhet.1017] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Abu T. Khan
- Department of Chemistry; Indian Institute of Technology Guwahati; Guwahati 781 039; India
| | - Md. Musawwer Khan
- Department of Chemistry; Indian Institute of Technology Guwahati; Guwahati 781 039; India
| | - Deb Kumar Das
- Department of Chemistry; Indian Institute of Technology Guwahati; Guwahati 781 039; India
| | - Mohan Lal
- Department of Chemistry; Indian Institute of Technology Guwahati; Guwahati 781 039; India
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13
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An efficient and recyclable catalyst for the cleavage of tert-butyldiphenylsilyl ethers. Carbohydr Res 2012; 354:6-20. [DOI: 10.1016/j.carres.2012.02.021] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2011] [Revised: 02/14/2012] [Accepted: 02/22/2012] [Indexed: 11/23/2022]
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14
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Convergent synthesis of the pentasaccharide repeating unit of the O-antigenic polysaccharide of enterohaemorrhagic Escherichia coli O113. Glycoconj J 2012; 29:181-8. [PMID: 22562778 DOI: 10.1007/s10719-012-9383-4] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2012] [Revised: 04/16/2012] [Accepted: 04/18/2012] [Indexed: 10/28/2022]
Abstract
An acidic pentasaccharide repeating unit corresponding to the O-antigenic polysaccharide of enterohaemorrhagic Escherichia coli O113 as its p-methoxyphenyl glycoside has been synthesized in a convergent manner by adopting a [3+2] block glycosylation strategy. During the synthetic endeavor a one-pot reaction condition for stereoselective glycosylation and protecting group manipulation has been applied. All glycosylation steps are highly stereoselective with good to excellent yield.
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15
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Ramesh D, Rajaram S, Narasimhulu M, Reddy TS, Mahesh KC, Manasa G, Venkateswarlu Y. Silica-supported Perchloric Acid Catalyzed One-pot Synthesis of 1,4-Dihydropyridines. CHINESE J CHEM 2011. [DOI: 10.1002/cjoc.201100032] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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16
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Prifti E, Goetz S, Nepogodiev SA, Field RA. Synthesis of fluorescently labelled rhamnosides: probes for the evaluation of rhamnogalacturonan II biosynthetic enzymes. Carbohydr Res 2011; 346:1617-21. [DOI: 10.1016/j.carres.2011.03.039] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2011] [Revised: 03/25/2011] [Accepted: 03/29/2011] [Indexed: 11/26/2022]
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17
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Santra A, Misra AK. Convergent synthesis of the tetrasaccharide repeating unit of the O-antigen of Shigella boydii type 9. Beilstein J Org Chem 2011; 7:1182-8. [PMID: 21977201 PMCID: PMC3182426 DOI: 10.3762/bjoc.7.137] [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: 06/01/2011] [Accepted: 07/25/2011] [Indexed: 11/23/2022] Open
Abstract
A convenient synthesis of the tetrasaccharide repeating unit of the O-antigen of Shigella boydii type 9 has been achieved in excellent yield using a [2 + 2] block glycosylation strategy. TEMPO-mediated selective oxidation of the primary alcohol of the tetrasaccharide derivative 8 to the carboxylic group followed by deprotection of the functional groups furnished target tetrasaccharide 1 as its 4-methoxyphenyl glycoside in high yield.
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Affiliation(s)
- Abhishek Santra
- Bose Institute, Division of Molecular Medicine, P-1/12, C.I.T. Scheme VII-M, Kolkata-700054, India; Fax: 91-33-2355 3886
| | - Anup Kumar Misra
- Bose Institute, Division of Molecular Medicine, P-1/12, C.I.T. Scheme VII-M, Kolkata-700054, India; Fax: 91-33-2355 3886
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18
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Nepogodiev SA, Fais M, Hughes DL, Field RA. Synthesis of apiose-containing oligosaccharide fragments of the plant cell wall: fragments of rhamnogalacturonan-II side chains A and B, and apiogalacturonan. Org Biomol Chem 2011; 9:6670-84. [PMID: 21847487 DOI: 10.1039/c1ob05587a] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Fragments of pectic polysaccharides rhamnogalacturonan-II (RG-II) and apiogalacturonan were synthesised using p-tolylthio apiofuranoside derivatives as key building blocks. Apiofuranose thioglycosides can be conveniently prepared by cyclization of the corresponding dithioacetals possessing a 2,3-O-isopropylidene group, which is required for preservation of the correct (3R) configuration of the apiofuranose ring. The remarkable stability of this protecting group in apiofuranose derivatives requires its replacement with a more reactive protecting group, such as a benzylidene acetal which was used in the synthesis of trisaccharide β-Rhap-(1→3')-β-Apif-(1→2)-α-GalAp-OMe. The X-ray crystal structure of the protected precursor of this trisaccharide has been elucidated.
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Affiliation(s)
- Sergey A Nepogodiev
- Department of Biological Chemistry, John Innes Centre, Norwich Research Park, Norwich, UK NR4 7UH.
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19
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Sau A, Misra AK. Environmentally Benign Preparation of Benzylidene Acetal of Carbohydrate Derivatives in PEG 600. J Carbohydr Chem 2011. [DOI: 10.1080/07328303.2011.585260] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- Abhijit Sau
- a Bose Institute, Division of Molecular Medicine , P-1/12, C.I.T. Scheme VII-M, Kolkata, 700054, India
| | - Anup Kumar Misra
- a Bose Institute, Division of Molecular Medicine , P-1/12, C.I.T. Scheme VII-M, Kolkata, 700054, India
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20
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Harvey DJ. Analysis of carbohydrates and glycoconjugates by matrix-assisted laser desorption/ionization mass spectrometry: an update for the period 2005-2006. MASS SPECTROMETRY REVIEWS 2011; 30:1-100. [PMID: 20222147 DOI: 10.1002/mas.20265] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
This review is the fourth update of the original review, published in 1999, on the application of MALDI mass spectrometry to the analysis of carbohydrates and glycoconjugates and brings coverage of the literature to the end of 2006. The review covers fundamental studies, fragmentation of carbohydrate ions, method developments, and applications of the technique to the analysis of different types of carbohydrate. Specific compound classes that are covered include carbohydrate polymers from plants, N- and O-linked glycans from glycoproteins, glycated proteins, glycolipids from bacteria, glycosides, and various other natural products. There is a short section on the use of MALDI-TOF mass spectrometry for the study of enzymes involved in glycan processing, a section on industrial processes, particularly the development of biopharmaceuticals and a section on the use of MALDI-MS to monitor products of chemical synthesis of carbohydrates. Large carbohydrate-protein complexes and glycodendrimers are highlighted in this final section.
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Affiliation(s)
- David J Harvey
- Department of Biochemistry, Oxford Glycobiology Institute, University of Oxford, Oxford OX1 3QU, UK.
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21
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Efficient synthesis of trisaccharide saponins and their tumor cell killing effects through oncotic necrosis. Bioorg Med Chem Lett 2011; 21:622-7. [DOI: 10.1016/j.bmcl.2010.12.046] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2010] [Revised: 12/07/2010] [Accepted: 12/08/2010] [Indexed: 01/12/2023]
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22
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Rauter AP, Xavier NM, Lucas SD, Santos M. Zeolites and other silicon-based promoters in carbohydrate chemistry. Adv Carbohydr Chem Biochem 2010; 63:29-99. [PMID: 20381704 DOI: 10.1016/s0065-2318(10)63003-x] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
Silicon-based materials, namely zeolites, clays, and silica gel have been widely used in organic synthesis, allowing mild reaction conditions and environmentally friendly methodologies. These heterogeneous catalysts are easy to handle, possess nontoxic and noncorrosive character and offer the possibility of recovery and reuse, thus contributing to clean and sustainable organic transformations. Moreover, they present shape-selective properties and provide stereo- and regiocontrol in chemical reactions. Herein, we survey the most significant applications of silicon-based materials as catalysts in carbohydrate chemistry, to mediate important transformations such as glycosylation, sugar protection and deprotection, and hydrolysis and dehydration. Emphasis is placed on their promising synthetic potential in comparison with conventional catalysts.
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23
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Ludek OR, Gu W, Gildersleeve JC. Activation of glycosyl trichloroacetimidates with perchloric acid on silica (HClO(4)-SiO(2)) provides enhanced alpha-selectivity. Carbohydr Res 2010; 345:2074-8. [PMID: 20692651 DOI: 10.1016/j.carres.2010.07.030] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2010] [Revised: 07/15/2010] [Accepted: 07/16/2010] [Indexed: 11/16/2022]
Abstract
Obtaining high stereoselectivity in glycosylation reactions is often challenging in the absence of neighboring group participation. In this study, we demonstrate that activation of glycosyl trichloroacetimidate donors with immobilized perchloric acid on silica (HClO(4)-SiO(2)) provides higher alpha-selectivity than trimethylsilyl triflate (TMSOTf) for reactions that do not involve neighboring group participation.
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Affiliation(s)
- Olaf R Ludek
- Chemical Biology Laboratory, National Cancer Institute at Frederick, National Institutes of Health, 376 Boyles St., Frederick, MD 21702, USA
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24
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Dalpozzo R, Bartoli G, Sambri L, Melchiorre P. Perchloric Acid and Its Salts: Very Powerful Catalysts in Organic Chemistry. Chem Rev 2010; 110:3501-51. [DOI: 10.1021/cr9003488] [Citation(s) in RCA: 76] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Renato Dalpozzo
- Department of Chemistry, Università della Calabria, Ponte Bucci cubo 12/c,I-87030 Arcavacata di Rende (Cs), Italy
| | - Giuseppe Bartoli
- Department of Organic Chemistry “A. Mangini”, Università di Bologna, viale Risorgimento 4, I-40136 Bologna, Italy
| | - Letizia Sambri
- Department of Organic Chemistry “A. Mangini”, Università di Bologna, viale Risorgimento 4, I-40136 Bologna, Italy
| | - Paolo Melchiorre
- ICIQ - Institut Català d’Investigació Química, Avgda. Països Catalans 16, E-43007 Tarragona, Spain
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25
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Liu HX, Wu QP, Shu YN, Chen X, Xi XD, Du TJ, Zhang QS. A mild, efficient, and selective procedure for transprotection of acetonides to acetates catalyzed with HClO4–SiO2. Carbohydr Res 2009; 344:2342-8. [DOI: 10.1016/j.carres.2009.08.035] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2009] [Revised: 07/24/2009] [Accepted: 08/27/2009] [Indexed: 10/20/2022]
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26
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Kumar A, Sharma S, Maurya RA. A novel multi-component reaction of indole, formaldehyde, and tertiary aromatic amines. Tetrahedron Lett 2009. [DOI: 10.1016/j.tetlet.2009.08.046] [Citation(s) in RCA: 56] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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27
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Encinas L, Chiara JL. Lipophilic Thioglycosides for the Solution-Phase Synthesis of Oligosaccharides Using Biphasic Liquid-Liquid Separation. European J Org Chem 2009. [DOI: 10.1002/ejoc.200900081] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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29
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30
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Dasgupta S, Mukhopadhyay B. Synthesis of Oligosaccharides Related to a Biodynamic Saponin fromCalamus Insignisas Their Propargyl Glycosides. European J Org Chem 2008. [DOI: 10.1002/ejoc.200800834] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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31
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Mahdavinia GH, Bigdeli MA, Heravi MM. Silica supported perchloric acid (HClO4–SiO2): A mild, reusable and highly efficient heterogeneous catalyst for the synthesis of amidoalkyl naphthols. CHINESE CHEM LETT 2008. [DOI: 10.1016/j.cclet.2008.06.048] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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32
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Cheng S, Du Y, Bing F, Zhang G. Synthesis of flaccidoside II, a bidesmosidic triterpene saponin isolated from Chinese folk medicine Di Wu. Carbohydr Res 2008; 343:462-9. [DOI: 10.1016/j.carres.2007.11.015] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2007] [Revised: 11/09/2007] [Accepted: 11/12/2007] [Indexed: 11/16/2022]
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33
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Heydari A, MáMani L. Silica-supported perchloric acid as a recyclable catalyst for efficient trimethylsilyl cyanide addition to aldehydes. Appl Organomet Chem 2008. [DOI: 10.1002/aoc.1339] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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34
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Hossein Mahdavinia G, A. Bigdeli M, Saeidi Hayeniaz Y, Nemati F. Efficient Synthesis of 1,8-Dioxo-octahydroxanthenes Using HClO4 / SiO2 as Catalyst. HETEROCYCLES 2008. [DOI: 10.3987/com-08-11459] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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35
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Dasgupta S, Pramanik K, Mukhopadhyay B. Oligosaccharides through reactivity tuning: convergent synthesis of the trisaccharides of the steroid glycoside Sokodoside B isolated from marine sponge Erylus placenta. Tetrahedron 2007. [DOI: 10.1016/j.tet.2007.09.072] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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36
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Mandal S, Mukhopadhyay B. Concise synthesis of two trisaccharides related to the saponin isolated from Centratherum anthelminticum. Tetrahedron 2007. [DOI: 10.1016/j.tet.2007.08.077] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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37
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Bigdeli MA, Nemati F, Mahdavinia GH. HClO4–SiO2 catalyzed stereoselective synthesis of β-amino ketones via a direct Mannich-type reaction. Tetrahedron Lett 2007. [DOI: 10.1016/j.tetlet.2007.07.088] [Citation(s) in RCA: 62] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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38
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Bigdeli MA, Heravi MM, Mahdavinia GH. Silica supported perchloric acid (HClO4-SiO2): A mild, reusable and highly efficient heterogeneous catalyst for the synthesis of 14-aryl or alkyl-14-H-dibenzo[a,j]xanthenes. ACTA ACUST UNITED AC 2007. [DOI: 10.1016/j.molcata.2007.05.007] [Citation(s) in RCA: 67] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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39
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Tiwari P, Misra AK. Synthesis of a Pentasaccharide Repeating Unit of the Extracellular Polysaccharide Produced by Lactobacillus Delbrueckii Subsp. Bulgaricus 291. J Carbohydr Chem 2007. [DOI: 10.1080/07328300701410676] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- Pallavi Tiwari
- a Medicinal and Process Chemistry Division , Central Drug Research Institute , Lucknow, India
| | - Anup Kumar Misra
- a Medicinal and Process Chemistry Division , Central Drug Research Institute , Lucknow, India
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40
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HClO4–SiO2 and PPA–SiO2 catalyzed efficient one-pot Knoevenagel condensation, Michael addition and cyclo-dehydration of dimedone and aldehydes in acetonitrile, aqueous and solvent free conditions: Scope and limitations. ACTA ACUST UNITED AC 2007. [DOI: 10.1016/j.molcata.2006.12.039] [Citation(s) in RCA: 219] [Impact Index Per Article: 12.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Kantevari S, Vuppalapati SV, Biradar DO, Nagarapu L. Highly efficient, one-pot, solvent-free synthesis of tetrasubstituted imidazoles using HClO4–SiO2 as novel heterogeneous catalyst. ACTA ACUST UNITED AC 2007. [DOI: 10.1016/j.molcata.2006.10.048] [Citation(s) in RCA: 138] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Silica supported perchloric acid: A mild and highly efficient heterogeneous catalyst for the synthesis of poly-substituted quinolines via Friedländer hetero-annulation. ACTA ACUST UNITED AC 2007. [DOI: 10.1016/j.molcata.2006.10.049] [Citation(s) in RCA: 66] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Agnihotri G, Misra AK. Synthesis of a di- and a trisaccharide related to the O-antigen of Escherichia coli O83:K24:H31. Carbohydr Res 2006; 341:2420-5. [PMID: 16884704 DOI: 10.1016/j.carres.2006.07.007] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2006] [Revised: 07/06/2006] [Accepted: 07/13/2006] [Indexed: 11/18/2022]
Abstract
Di- and trisaccharide fragments related to the repeating unit of the O-antigen of Escherichia coli O83:K24:H31 have been synthesized as their methyl glycoside analogs starting from readily available monosaccharides.
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Affiliation(s)
- Geetanjali Agnihotri
- Medicinal and Process Chemistry Division, Central Drug Research Institute, Chattar Manzil Palace, Lucknow 226001, UP, India
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Tiwari P, Misra AK. Selective removal of anomeric O-acetate groups in carbohydrates using HClO4–SiO2. Tetrahedron Lett 2006. [DOI: 10.1016/j.tetlet.2006.03.050] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Remarkably efficient activation of glycosyl trichloro- and (N-phenyl)trifluoroacetimidates with bismuth(III) triflate. Tetrahedron Lett 2006. [DOI: 10.1016/j.tetlet.2006.02.034] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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