1
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Das S, Maiti S, Mukhopadhyay B. Chemical synthesis of 6-deoxy-D-talose containing a tetrasaccharide repeating unit of the O-specific polysaccharide from Enterobacter cloacae G3422 in the form of its 2-aminoethyl glycoside. Org Biomol Chem 2024; 22:2414-2422. [PMID: 38414386 DOI: 10.1039/d4ob00183d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/29/2024]
Abstract
Chemical synthesis of the tetrasaccharide repeating unit of the O-specific polysaccharide from Enterobacter cloacae G3422 is reported. The synthesis of the target tetrasaccharide is achieved through a convergent [2 + 2]-block strategy. The conjugation ready target oligosaccharide is attractive for further glycoconjugate formation with a suitable aglycon. Synthesis of the challenging 6-deoxy-L-talose moiety is reported using two different approaches and the obvious difficulties are discussed.
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Affiliation(s)
- Subrata Das
- Sweet Lab, Department of Chemical Sciences, Indian Institute of Science Education and Research Kolkata, Mohanpur, Nadia, 741246, India.
| | - Sanajit Maiti
- Sweet Lab, Department of Chemical Sciences, Indian Institute of Science Education and Research Kolkata, Mohanpur, Nadia, 741246, India.
| | - Balaram Mukhopadhyay
- Sweet Lab, Department of Chemical Sciences, Indian Institute of Science Education and Research Kolkata, Mohanpur, Nadia, 741246, India.
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2
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First Synthesis of DBU-Conjugated Cationic Carbohydrate Derivatives and Investigation of Their Antibacterial and Antifungal Activity. Int J Mol Sci 2023; 24:ijms24043550. [PMID: 36834964 PMCID: PMC9968064 DOI: 10.3390/ijms24043550] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2022] [Revised: 01/31/2023] [Accepted: 02/07/2023] [Indexed: 02/12/2023] Open
Abstract
The emergence of drug-resistant bacteria and fungi represents a serious health problem worldwide. It has long been known that cationic compounds can inhibit the growth of bacteria and fungi by disrupting the cell membrane. The advantage of using such cationic compounds is that the microorganisms would not become resistant to cationic agents, since this type of adaptation would mean significantly altering the structure of their cell walls. We designed novel, DBU (1,8-diazabicyclo[5.4.0]undec-7-ene)-derived amidinium salts of carbohydrates, which may be suitable for disturbing the cell walls of bacteria and fungi due to their quaternary ammonium moiety. A series of saccharide-DBU conjugates were prepared from 6-iodo derivatives of d-glucose, d-mannose, d-altrose and d-allose by nucleophilic substitution reactions. We optimized the synthesis of a d-glucose derivative, and studied the protecting group free synthesis of the glucose-DBU conjugates. The effect of the obtained quaternary amidinium salts against Escherichia coli and Staphylococcus aureus bacterial strains and Candida albicans yeast was investigated, and the impact of the used protecting groups and the sugar configuration on the antimicrobial activity was analyzed. Some of the novel sugar quaternary ammonium compounds with lipophilic aromatic groups (benzyl and 2-napthylmethyl) showed particularly good antifungal and antibacterial activity.
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3
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Bando M, Kawasaki Y, Nagata O, Okada Y, Ikuta D, Ikeuchi K, Yamada H. β-Selective Glycosylation Using Axial-Rich and 2-O-Rhamnosylated Glucosyl Donors Controlled by the Protecting Pattern of the Second Sugar. Chem Pharm Bull (Tokyo) 2021; 69:124-140. [PMID: 33390514 DOI: 10.1248/cpb.c20-00733] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Herein, we describe two counterexamples of the previously reported β/α-selectivity of 96/4 for glycosylation using ethyl 2-O-[2,3,4-tris-O-tert-butyldimethylsilyl (TBS)-α-L-rhamnopyranosyl]-3,4,6-tris-O-TBS-thio-β-D-glucopyranoside as the glycosyl donor. Furthermore, we investigated the effects of protecting group on the rhamnose moieties in the glycosylation with cholestanol and revealed that β-selectivity originated from the two TBS groups at the 3-O and 4-O positions of rhamnose. In contrast, the TBS group at the 2-O position of rhamnose hampered the β-selectivity. Finally, the β/α-selectivity during the glycosylation was enhanced to ≥99/1. The results obtained herein suggest that the protecting groups on the sugar connected to the 2-O of a glycosyl donor with axial-rich conformation can control the stereoselectivity of glycosylation.
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Affiliation(s)
- Masafumi Bando
- School of Science and Technology, Kwansei Gakuin University
| | - Yuri Kawasaki
- School of Science and Technology, Kwansei Gakuin University
| | - Osamu Nagata
- School of Science and Technology, Kwansei Gakuin University
| | - Yasunori Okada
- School of Science and Technology, Kwansei Gakuin University
| | - Daiki Ikuta
- School of Science and Technology, Kwansei Gakuin University
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4
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Kundu M, Gucchait A, Misra AK. Convergent synthesis of a pentasaccharide corresponding to the cell wall O-polysaccharide of enteropathogenic Escherichia coli O115. Tetrahedron 2020. [DOI: 10.1016/j.tet.2020.130952] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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5
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Sarkar V, Mukhopadhyay B. Synthesis of the Pentasaccharide Repeating Unit Related to the Exopolysaccharide fromLactobacillus plantarumC88 in the Form of its 2-Aminoethyl Glycoside. ChemistrySelect 2016. [DOI: 10.1002/slct.201601386] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Vikramjit Sarkar
- Sweet Lab, Department of Chemical Sciences; Indian Institute of Science Education and Research (IISER) Kolkata; Mohanpur Nadia 741246
| | - Balaram Mukhopadhyay
- Sweet Lab, Department of Chemical Sciences; Indian Institute of Science Education and Research (IISER) Kolkata; Mohanpur Nadia 741246
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6
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Ochiai H, Niwa T, Hosoya T. Stereoinversion of Stereocongested Carbocyclic Alcohols via Triflylation and Subsequent Treatment with Aqueous N,N-Dimethylformamide. Org Lett 2016; 18:5982-5985. [DOI: 10.1021/acs.orglett.6b02675] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Hidenori Ochiai
- Chemical Biology Team, Division
of Bio-Function Dynamics Imaging, RIKEN Center for Life Science Technologies, 6-7-3 Minatojima-minamimachi, Chuo-ku, Kobe 650-0047, Japan
| | - Takashi Niwa
- Chemical Biology Team, Division
of Bio-Function Dynamics Imaging, RIKEN Center for Life Science Technologies, 6-7-3 Minatojima-minamimachi, Chuo-ku, Kobe 650-0047, Japan
| | - Takamitsu Hosoya
- Chemical Biology Team, Division
of Bio-Function Dynamics Imaging, RIKEN Center for Life Science Technologies, 6-7-3 Minatojima-minamimachi, Chuo-ku, Kobe 650-0047, Japan
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7
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Ka SM, Kuoping Chao L, Lin JC, Chen ST, Li WT, Lin CN, Cheng JC, Jheng HL, Chen A, Hua KF. A low toxicity synthetic cinnamaldehyde derivative ameliorates renal inflammation in mice by inhibiting NLRP3 inflammasome and its related signaling pathways. Free Radic Biol Med 2016; 91:10-24. [PMID: 26675345 DOI: 10.1016/j.freeradbiomed.2015.12.003] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/20/2015] [Revised: 11/14/2015] [Accepted: 12/04/2015] [Indexed: 12/21/2022]
Abstract
Uncontrolled inflammation is a leading cause of various chronic diseases. Cinnamaldehyde (CA) is a major bioactive compound isolated from the essential oil of the leaves of Cinnamomum osmophloeum kaneh that exhibits anti-inflammatory activity; however, the use of CA is limited by its cytotoxicity. Here, we synthesized three CA derivatives and identified 4-hydroxycinnamaldehyde-galactosamine (HCAG) as a low toxicity anti-inflammatory compound in vitro (HCAG IC50 ≫ 1600 µM; CA IC50=40 µM) and in vivo. HCAG reduced pro-inflammatory mediator expression in LPS-activated macrophages by inhibiting MAPK and PKC-α/δ phosphorylation, decreasing ROS generation and reducing NF-κB activation. HCAG also reduced NLRP3 inflammasome-derived IL-1β secretion by inhibiting the ATP-mediated phosphorylation of AKT and PKC-α/δ. In a mouse model of LPS-induced renal inflammation, we observed reduced albuminuria and a mild degree of glomerular proliferation, glomerular sclerosis and periglomerular inflammation in the HCAG-treated mice compared with the vehicle-treated mice. The underlying mechanisms for these renoprotective effects involved: (1) inhibited NLRP3 inflammasome activation; (2) decreased superoxide anion levels and apoptosis; and (3) suppressed activation of NF-κB and related downstream inflammatory mediators.
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Affiliation(s)
- Shuk-Man Ka
- Graduate Institute of Aerospace and Undersea Medicine, National Defense Medical Center, Taipei, Taiwan
| | | | - Jung-Chen Lin
- Department of Pathology, Tri-Service General Hospital, National Defense Medical Center, Taipei, Taiwan
| | - Shui-Tein Chen
- Institute of Biological Chemistry, Academia Sinica, Taipei, Taiwan
| | - Wen-Tai Li
- National Research institute of Chinese Medicine, Ministry of Health and Welfare, Taipei, Taiwan
| | - Chien-Nan Lin
- Department of Biotechnology and Animal Science, National Ilan University, Ilan, Taiwan
| | - Jen-Che Cheng
- Department of Biotechnology and Animal Science, National Ilan University, Ilan, Taiwan
| | - Huei-Ling Jheng
- Department of Pathology, Tri-Service General Hospital, National Defense Medical Center, Taipei, Taiwan
| | - Ann Chen
- Department of Pathology, Tri-Service General Hospital, National Defense Medical Center, Taipei, Taiwan
| | - Kuo-Feng Hua
- Department of Pathology, Tri-Service General Hospital, National Defense Medical Center, Taipei, Taiwan; Department of Biotechnology and Animal Science, National Ilan University, Ilan, Taiwan.
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8
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Chemical synthesis of the pentasaccharide related to the repeating unit of the O-antigen of Enterobacter cloacae G2277. Tetrahedron 2015. [DOI: 10.1016/j.tet.2015.06.095] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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9
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Affiliation(s)
| | - Mikael Bols
- Department of Chemistry, University of Copenhagen, DK-2100 Copenhagen, Denmark
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10
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Budhadev D, Mukhopadhyay B. Convergent synthesis of the hexasaccharide related to the repeating unit of the O-antigen from E. coli O120. RSC Adv 2015. [DOI: 10.1039/c5ra20363e] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The hexasaccharide repeating unit of the O-antigen from E. coli O120 has been synthesized in the form of its 4-methoxyphenyl glycoside by a convergent [2 + 4] strategy.
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Affiliation(s)
- Darshita Budhadev
- Department of Chemical Sciences
- Indian Institute of Science Education and Research (IISER) Kolkata
- Mohanpur 741246
- India
| | - Balaram Mukhopadhyay
- Department of Chemical Sciences
- Indian Institute of Science Education and Research (IISER) Kolkata
- Mohanpur 741246
- India
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11
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Synthesis of a pentasaccharide repeating unit of the O-antigen of enteroadherent Escherichia coli O154 strain. ACTA ACUST UNITED AC 2014. [DOI: 10.1016/j.tetasy.2014.03.007] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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12
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Ekholm FS, Schneider G, Wölfling J, Leino R. An approach to the synthesis and attachment of scillabiose to steroids. Steroids 2011; 76:588-95. [PMID: 21352842 DOI: 10.1016/j.steroids.2011.02.010] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/16/2010] [Revised: 02/03/2011] [Accepted: 02/16/2011] [Indexed: 11/20/2022]
Abstract
Hellebrin and transvaalin are two naturally occurring saponins with biological activity. In the present paper, we describe a high yielding route to the synthesis and coupling of their shared glycone, scillabiose, to a model steroid. A convergent coupling strategy utilizing a scillabiose-based glycosyl donor was devised for the glycosylation. This convergent approach is appealing due to its high efficiency and simple deprotection procedure and may find further use in total synthesis of naturally occurring saponins and related compounds sharing the same glycone. Due to the widespread occurrence of this glycone in nature, the complete NMR spectroscopic characterization of all compounds prepared herein is provided as reference material. In addition, glycosylations were performed with the monosaccharide constituents of scillabiose, thereby providing a limited series of glycosylated steroids for potential future evaluation of the effects of the glycone on the overall biological activity.
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Affiliation(s)
- Filip S Ekholm
- Laboratory of Organic Chemistry, Åbo Akademi University, Biskopsgatan 8, FI-20500 Åbo, Finland
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13
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Verma P, Raj R, Roy B, Mukhopadhyay B. Synthesis of a tetrasaccharide related to the triterpenoid saponin isolated from Schima noronhae. ACTA ACUST UNITED AC 2010. [DOI: 10.1016/j.tetasy.2010.09.002] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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14
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Combination of solid phase and solution phase synthesis of oligosaccharides using sonication. Tetrahedron Lett 2010. [DOI: 10.1016/j.tetlet.2010.06.027] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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15
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Cai X, Zong G, Xu Y, Zhang J, Liang X, Wang D. Efficient synthesis of a 6-deoxytalose tetrasaccharide related to the antigenic O-polysaccharide produced by Aggregatibacter actinomycetemcomitans serotype c. Carbohydr Res 2010; 345:1230-4. [DOI: 10.1016/j.carres.2010.04.009] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2010] [Revised: 03/31/2010] [Accepted: 04/09/2010] [Indexed: 11/25/2022]
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16
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Synthesis of a tetrasaccharide related to the O-antigen from Azospirillum lipoferum SR65. Carbohydr Res 2010; 345:432-6. [DOI: 10.1016/j.carres.2009.11.024] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2009] [Revised: 11/11/2009] [Accepted: 11/19/2009] [Indexed: 11/21/2022]
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17
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Roy B, Field RA, Mukhopadhyay B. Synthesis of a tetrasaccharide related to the repeating unit of the O-antigen from Escherichia coli K-12. Carbohydr Res 2009; 344:2311-6. [PMID: 19836012 DOI: 10.1016/j.carres.2009.09.026] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2009] [Revised: 09/19/2009] [Accepted: 09/22/2009] [Indexed: 10/20/2022]
Abstract
Synthesis of a tetrasaccharide related to the repeating unit of the O-antigen from Escherichia coli K-12 is reported in the form of its octyl glycoside. Syntheses of the 1,2-cis glycosidic linkages have been accomplished by using NIS in conjunction with H(2)SO(4)-silica, and it was found to be stereoselective and productive. The synthesized tetrasaccharide will be utilized as the substrate for galactofuranosyltransferase, WbbI.
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Affiliation(s)
- Bimalendu Roy
- Indian Institute of Science Education and Research-Kolkata, Mohanpur Campus, P.O. BCKV Campus Main Office, Mohanpur, Nadia, West Bengal, India
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18
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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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19
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Rajput VK, Mukhopadhyay B. Concise Synthesis of a Pentasaccharide Related to the Anti-Leishmanial Triterpenoid Saponin Isolated from Maesa balansae. J Org Chem 2008; 73:6924-7. [DOI: 10.1021/jo801171f] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Vishal Kumar Rajput
- Indian Institute of Science Education and Research-Kolkata (IISER-K), HC-7, Sector-III, Salt Lake City, Kolkata 700 106, India
| | - Balaram Mukhopadhyay
- Indian Institute of Science Education and Research-Kolkata (IISER-K), HC-7, Sector-III, Salt Lake City, Kolkata 700 106, India
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20
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Osman H, Larsen DS, Hanton LR, Simpson J. Phenyl 2,3- O-isopropylidene-1-thio-α- D-rhamnopyranoside. Acta Crystallogr Sect E Struct Rep Online 2008; 64:o24-5. [PMID: 21200806 PMCID: PMC2914986 DOI: 10.1107/s1600536807061004] [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: 11/19/2007] [Accepted: 11/20/2007] [Indexed: 11/10/2022]
Abstract
In the title compound, C15H20O4S, a dioxolane ring is fused to the pyran ring of the sugar which carries a thiophenyl substituent on the anomeric C atom. The dioxolane ring adopts an envelope conformation and the pyran ring system a distorted 4C1 chair. The structure is stabilized by O—H⋯O hydrogen bonds, forming centrosymmetric dimers that generate an R22(10) ring motif. Additional C—H⋯O interactions form an extended network. Two C atoms of the phenyl ring are disordered over two positions; the site occupancy factors are ca. 0.7 and 0.3.
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21
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Das SK, Reddy KA, Mukkanti K. Total synthesis of phenylpropanoid glycosides, grayanoside A and syringalide B, through a common intermediate. Carbohydr Res 2007; 342:2309-15. [PMID: 17637461 DOI: 10.1016/j.carres.2007.06.022] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2007] [Revised: 06/15/2007] [Accepted: 06/19/2007] [Indexed: 10/23/2022]
Abstract
Phenylpropanoid glycosides are known as bioactive natural products. Two of them, grayanoside A (1) and syringalide B (2), were synthesized through a common intermediate, using benzyl as temporary protecting group following a shorter route.
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Affiliation(s)
- Saibal Kumar Das
- Discovery Chemistry, Discovery Research, Dr. Reddy's Laboratories Ltd, Bollaram Road, Miyapur, Hyderabad 500 049, AP, India.
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22
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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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23
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Roy B, Pramanik K, Mukhopadhyay B. Synthesis of a tetra- and a trisaccharide related to an anti-tumor saponin “Julibroside J28” from Albizia julibrissin. Glycoconj J 2007; 25:157-66. [PMID: 17701454 DOI: 10.1007/s10719-007-9068-6] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2007] [Revised: 07/09/2007] [Accepted: 07/17/2007] [Indexed: 11/30/2022]
Abstract
Simple and convergent synthesis of a tetra- and a trisaccharide portions of an antitumor compound Julibroside J(28), isolated from Albizia julibrissin, that showed significant in vitro antitumor activity against HeLa, Bel-7402 and PC-3M-1E8 cancer cell lines is reported. The tetrasaccharide has been synthesized as its p-methoxyphenyl glycoside starting from commercially available D-glucose, L-rhamnose and L-arabinose. The trisaccharide part has been synthesized from commercially available N-acetyl D-glucosamine, D-fucose and D-xylose using simple protecting group manipulations. Sulfuric acid immobilized on silica has been used successfully as a Brönsted acid catalyst for the crucial glycosylation steps.
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Affiliation(s)
- Bimalendu Roy
- Medicinal and Process Chemistry Division, Central Drug Research Institute, Chattar Manzil Palace, Lucknow, 226 001 Uttar Pradesh, India
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24
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Saksena R, Adamo R, Kovác P. Immunogens related to the synthetic tetrasaccharide side chain of the Bacillus anthracis exosporium. Bioorg Med Chem 2007; 15:4283-310. [PMID: 17412599 PMCID: PMC2266069 DOI: 10.1016/j.bmc.2007.03.057] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2007] [Revised: 03/14/2007] [Accepted: 03/18/2007] [Indexed: 11/28/2022]
Abstract
The known methyl 2-O-acetyl-3,4-di-O-benzyl-1-thio-alpha-L-rhamnopyranoside (3) was converted to the corresponding 5-methoxycarbonylpentyl glycoside 4 which was deacetylated. The product 5 was used as the initial glycosyl acceptor to construct two trirhamnoside glycosyl acceptors having HO-3(III) flanked by either benzoyl or benzyl groups, compounds 10 and 29, respectively [fully protected, except HO-3(III), alpha-L-Rha-(1-->3)-alpha-L-Rha-(1-->2)-alpha-L-Rha-1-O-(CH2)5COOCH3]. When these were glycosylated with ethyl 4-azido-3-O-benzyl-4,6-dideoxy-2-O-bromoacetyl-1-thio-beta-D-glucopyranoside (18), only the benzylated glycosyl acceptor 29 gave good yield of the desired tetrasaccharide 30. The alpha- and beta-linked products, together with the corresponding orthoester 23, were formed in almost equal amount when glycosylation of 10 was performed with the glycosyl donor carrying the 2-O-bromoacetyl protecting group. Deprotection at O-2 of 30, followed by further functionalization of the molecule and global deprotection, gave the 5-methoxycarbonylpentyl glycoside of the title tetrasaccharide, beta-Ant-(1-->3)-alpha-L-Rha-(1-->3)-alpha-L-Rha-(1-->2)-alpha-L-Rha (35). Except for differences due to presence of the anomeric 5-methoxycarbonylpentyl group, the fully assigned NMR spectra of glycoside 35 were found to be virtually identical to those reported for the parent tetrasaccharide isolated from Bacillus anthracis exosporium, thus proving the correct structure assigned to the naturally occurring substance. All theoretically possible structural fragments of 35, as well as analog of 35 lacking the 2-O-methyl group at the terminal 4,6-dideoxyglucosyl residue, compound 40, were also synthesized. Tetrasaccharide 35, its beta-linked and non-methylated analogs 2 and 40, respectively, as well as the trirhamnoside fragment of 35, glycoside 12, were further functionalized and conjugated to BSA using squaric acid chemistry, to give neoglycoconjugates with a predetermined carbohydrate-protein ratio of approximately 3 and approximately 6.
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Affiliation(s)
- Rina Saksena
- NIDDK, LBC, National Institutes of Health, Bethesda, MD 20892-0815, USA
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25
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Gemma E, Lahmann M, Oscarson S. Synthesis of monodeoxy analogues of the trisaccharide α-d-Glcp-(1→3)-α-d-Manp-(1→2)-α-d-ManpOMe recognised by Calreticulin/Calnexin. Carbohydr Res 2006; 341:1533-42. [PMID: 16616903 DOI: 10.1016/j.carres.2006.03.015] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2006] [Revised: 03/07/2006] [Accepted: 03/12/2006] [Indexed: 11/17/2022]
Abstract
Six (3,4,4',6',3'' or 6'')-monodeoxy analogues of the title trisaccharide (1-6) have been prepared utilising monodeoxy monosaccharide precursors. The reducing end deoxy derivatives were synthesised by N-iodosuccinimide/silver trifluoromethanesulfonate (NIS/AgOTf)-promoted couplings of a common disaccharide thioglycoside donor 10 to suitably protected monodeoxy acceptors 9 and 12, affording trisaccharides, which after deprotection yielded target structures 1 and 2. The non-reducing end deoxy derivatives could similarly be produced by halide-assisted glycosylations of a common disaccharide acceptor 17 with monodeoxy glycosyl bromide donors (obtained from thioglycosides 18 and 20) to yield, after removal of protecting groups, target trisaccharides 3 and 4. The analogues with the deoxy function in the middle mannose residue, were obtained through orthogonal halide-assisted coupling of tetrabenzyl-glucopyranosyl bromide to monodeoxy thioglycoside acceptors to give thioglycoside disaccharides, which subsequently were used as donors in NIS/AgOTf-promoted couplings to a common 2-hydroxy-mannose acceptor 15 to afford trisaccharides; deprotection yielded the final target compounds 5 and 6.
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Affiliation(s)
- Emiliano Gemma
- Department of Chemistry, Göteborg University, S-412 96 Gothenburg, Sweden
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26
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Fekete A, Gyergyói K, Kövér KE, Bajza I, Lipták A. Preparation of the pentasaccharide hapten of the GPL of Mycobacterium avium serovar 19 by achieving the glycosylation of a tertiary hydroxyl group. Carbohydr Res 2006; 341:1312-21. [PMID: 16712821 DOI: 10.1016/j.carres.2006.04.038] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2006] [Revised: 04/13/2006] [Accepted: 04/20/2006] [Indexed: 11/30/2022]
Abstract
The chemical synthesis of the glycopeptidolipid-type pentasaccharide hapten of Mycobacterium avium serovar 19 with a trifluoroacetamido spacer at the reducing end is described. The spacer-armed pentasaccharide 31, when conjugated to an immunogenic protein, can be applied to the serodiagnosis of mycobacterial infections. The questionable structure of the penultimate monosaccharide unit was clarified as 6-deoxy-3-C-methyl-2,4-di-O-methyl-L-mannopyranose. The occurrence of the 6-deoxy-3-C-methyl-2,4-di-O-methyl-L-talopyranose could be excluded by the presence of the large H-1'-H-2' coupling constant, which proves the 4C1 (L) conformation as the favoured one.
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Affiliation(s)
- Anikó Fekete
- Research Group for Carbohydrates of the Hungarian Academy of Sciences, PO Box 94, H-4010 Debrecen, Hungary
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27
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Heidelberg T, Martin OR. Synthesis of the Glycopeptidolipid of Mycobacterium avium Serovar 4: First Example of a Fully Synthetic C-Mycoside GPL. J Org Chem 2004; 69:2290-301. [PMID: 15049621 DOI: 10.1021/jo030304e] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The preparation of the glycopeptidolipid (GPL) present in the cell wall of Mycobacterium aviumSerovar 4, namely 3,4-di-O-Me-alpha-L-Rhap-(1-->1)[R-C(21)H(43)CH(OH)CH(2)CO-D-Phe-[4-O-Me-alpha-L-Rhap-(1-->4)-2-O-Me-alpha-L-Fucp-(1-->3)-alpha-L-Rhap-(1-->2)-6-deoxy-alpha-L-Talp-(1-->3)]-D-allo-Thr-D-Ala-L-Alaol] (1), is described. The synthesis was based on the disconnection of the final structure into four building blocks, an L-rhamnosyl pseudodipeptide, a 6-deoxy-L-talosyl dipeptide, a trisaccharide donor, and a 3-hydroxyalkanoic acid. The key steps are the creation of the glycosidic linkage between the trisaccharide donor, used as a pentenyl glycoside, and the 6-deoxy-L-talose unit of an appropriate D-Phe-O-(6-deoxy-L-talosyl)-D-allo-Thr derivative and the final coupling of the two glycodipeptide fragments. Pentenyl glycosides were shown to provide useful donors in several glycosylation steps. This work constitutes the first synthesis of the full structure of a so-called "polar mycoside C" GPL.
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Affiliation(s)
- Thorsten Heidelberg
- Department of Chemistry, State University of New York, Binghamton, New York 13902-6016, USA
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28
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Yu B, Wang P. Efficient synthesis of the hexasaccharide fragment of landomycin A: using phenyl 2,3-O-thionocarbonyl-1-thioglycosides as 2-deoxy-beta-glycoside precursors. Org Lett 2002; 4:1919-22. [PMID: 12027647 DOI: 10.1021/ol0259286] [Citation(s) in RCA: 55] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
[carbohydrate structure: see text] The beta-p-methoxyphenol hexadeoxysaccharide fragment of landomycin A was synthesized in a total of 33 steps and 0.5% overall yield starting from D-mannose and D-xylose, featuring the use of phenyl 2,3-O-thionocarbonyl-1-thioglycosides as 2-deoxy-beta-glycoside precursors.
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Affiliation(s)
- Biao Yu
- State Key Laboratory of Bio-organic and Natural Products Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 354 Fenglin Road, Shanghai 200032, China.
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29
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Synthesis of the pentasaccharide hapten from the glycopeptidolipid antigen of Mycobacterium avium serovar 12. Tetrahedron Lett 2002. [DOI: 10.1016/s0040-4039(02)00491-4] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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30
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Bajza I, Kövér KE, Lipták A. Synthesis of p-trifluoroacetamidophenyl (4,6-dideoxy-4-formamido-3-C-methyl-2-O-methyl-alpha-L-mannopyranosyl)- (1-->3)-(2-O-methyl-alpha-D-rhamnopyranosyl)-(1-->3)- (2-O-methyl-alpha-L-fucopyranosyl)-(1-->3)-(alpha-L-rhamnopyranosyl)- (1-->2)-6-deoxy-alpha-L-talopyranoside: a spacer-armed pentasaccharide glycopeptidolipid antigen of Mycobacterium avium serovar 14. Carbohydr Res 1998; 308:247-58. [PMID: 9711823 DOI: 10.1016/s0008-6215(98)00074-3] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Abstract
Syntheses of p-trifluoroacetamidophenyl glycosides of the haptenic pentasaccharide and the non-reducing disaccharide unit of the title pentasaccharide are reported. The synthesis of the terminal N-formylkansosamine unit started from methyl 6-deoxy-2,3-O-isopropylidene-alpha-L-lyxo- hexopyran-4-uloside which, after C-3 methylation, was transformed into a glycosyl donor [3-O-benzyl-4-N-benzylformamido-4,6-dideoxy-3-C-methyl-2-O-methyl- alpha,beta-L-mannopyranosyl trichloroacetimidate (20), and used for the synthesis of p-trifluoroacetamidophenyl (4-formamido-4,6-dideoxy-3-C-methyl-2-O-methyl-alpha-L-mannopyranosyl)- (1-->3)-6-deoxy-2-O-methyl-alpha-D-mannopyranoside (29). Ethyl (3-O-benzyl-4-N-benzylformamido-4,6-dideoxy-3-C-methyl-2-O-methyl- alpha-L-mannopyranosyl)-(1-->3)-4-O-benzyl-6-deoxy-2-O-methyl-1-thio- alpha-D-mannopyranoside (31), prepared by glycosylation of ethyl 4-O-benzyl-6-deoxy-2-O-methyl-1-thio-alpha-D-mannopyranoside with 20, served as glycosyl donor in a 2 + 3 block synthesis of the title pentasaccharide.
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Affiliation(s)
- I Bajza
- Research Group for Carbohydrates of the Hungarian Academy of Sciences, Debrecen, Hungary
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31
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Banaszek A. Synthesis of the unique trisaccharide repeating unit, isolated from lipopolysaccharides Rhizobium leguminosarum bv. trifolii 24, and its analogue. Carbohydr Res 1998; 306:379-85. [PMID: 9648246 DOI: 10.1016/s0008-6215(97)10073-8] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
The synthesis of trisaccharide: 6-d-alpha-L-Talp(1-->2)-alpha-L-Rhap(1-->5)-DHA, and its analogue: 6-d-alpha-L-Talp(1-->2)-beta-L-Rhaf(1-->5)DHA is described. In the first step a disaccharide, composed of 6-d-L-Talp and L-Rhap was obtained. This, in turn, was converted to the corresponding 1-trichloroacetimidate and coupled with DHA alcohol to afford the required trisaccharide. Its analogue was achieved by the conversion of the above disaccharide to the glycosyl bromide, involving the rhamnopyranose ring scission, followed by condensation with DHA in Koenigs-Knorr procedure.
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Affiliation(s)
- A Banaszek
- Institute of Organic Chemistry, Polish Academy of Sciences, Warsaw, Poland
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32
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Kerékgyártó J, Agoston K, Batta G, Szurmai Z. Syntheses of spacer-armed carbohydrate components of the Mycobacterium avium serocomplex serovar 8. Carbohydr Res 1997; 297:153-61. [PMID: 9060182 DOI: 10.1016/s0008-6215(96)00255-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
p-Nitrophenyl glycosides of 3-O-Me-beta-D-Glcp-(1-->3)-alpha-L-Rhap, alpha-L-Rhap-(1-->2)-6-deoxy-alpha-L-Talp, and 3-O-Me-beta-D-Glcp-(1-->3)-alpha-L-Rhap-(1-->2)-6-deoxy-alpha-L-++ +Talp have been prepared, related to Mycobacterium avium. Various glycosylation methods have been used for the formation of the interglycosidic linkages. The p-nitrophenyl derivatives were converted into p-isothiocyanatophenyl glycosides, capable of forming neoglycoproteins.
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Affiliation(s)
- J Kerékgyártó
- Institute of Biochemistry, L. Kossuth University, Debrecen, Hungary
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33
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Banaszek A, Ciunik Z. Synthesis of the unique trisaccharide: 6-d-l-talpα(1→2)-l-rhafβ(1→5)-DHA. Tetrahedron Lett 1997. [DOI: 10.1016/s0040-4039(96)02290-3] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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34
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Affiliation(s)
- P J Garegg
- Department of Organic Chemistry, Arrhenius Laboratory, Stockholm University, Sweden
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35
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36
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Aspinall GO, Chatterjee D, Brennan PJ. The variable surface glycolipids of mycobacteria: structures, synthesis of epitopes, and biological properties. Adv Carbohydr Chem Biochem 1995; 51:169-242. [PMID: 7484363 DOI: 10.1016/s0065-2318(08)60194-8] [Citation(s) in RCA: 70] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Affiliation(s)
- G O Aspinall
- Department of Chemistry, York University, Ontario, Canada
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37
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Lipták A, Borbás A, Bajza I. Synthesis of carbohydrate-containing surface antigens of mycobacteria. Med Res Rev 1994; 14:307-52. [PMID: 8007739 DOI: 10.1002/med.2610140303] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Affiliation(s)
- A Lipták
- Institute of Biochemistry, L. Kossuth University, Debrecen, Hungary
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38
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Bajza I, Kerékgyártó J, Hajkó J, Szilágyi L, Lipták A. Chemical synthesis of the pyruvic acetal-containing trisaccharide unit of the species-specific glycopeptidolipid from Mycobacterium avium serovariant 8. Carbohydr Res 1994; 253:111-20. [PMID: 8156543 DOI: 10.1016/0008-6215(94)80059-6] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
The functionalized, pyruvic acetal-containing haptenic trisaccharide, p-trifluoroacetamidophenyl 6-deoxy-2-O-(3-O-[4,6-O-(S)-(1-methoxycarbonylethylidene)-3-O-meth yl- beta-D-glucopyranosyl]-alpha-L-rhamnopyranosyl)-alpha-L-talopyranosid e (19), a component of the glycolipid from Mycobacterium avium serovar 8 was synthesized. For the preparation of the terminal pyruvic acetal-containing unit, benzyl 2-O-benzyl-3-O-methyl-beta-D-glucopyranoside (6) was condensed with methyl 2,2-di(ethylthio)propionate (1) in the presence of SO2Cl2-CF3SO3H catalyst to yield benzyl 2-O-benzyl-4,6-O-(S)-(1-methoxycarbonylethylidene)-3-O-methyl-beta -D- glucopyranoside (7S), which was then converted into the suitably substituted glycosyl donor 2-O-acetyl-4,6-O-(S)-(1-methoxycarbonylethylidene)-3-O-methyl-alph a-D- glucopyranosyl trichloroacetimidate (11). The disaccharide glycosyl acceptor p-nitrophenyl endo-3,4-O-benzylidene-6-deoxy-2-O-(2,4-di-O-benzyl-alpha-L-rhamnopyrano syl)- alpha-L-talopyranoside (15) was glycosylated with 11 in the presence of trimethyl trifluoromethanesulfonate to furnish the protected trisaccharide p-nitrophenyl 2-O-(3-O-[2-O-acetyl-4,6-O-(S)-(1-methoxycarbonylethylidene)-3-O-m ethyl-beta- D-glucopyranosyl]-2,4-di-O-benzyl-alpha-L-rhamnopyranosyl)-endo-3,4- O-benzylidene-6-deoxy-alpha-L-talopyranoside (16). After deprotection, this gave the spacer-armed unprotected haptenic trisaccharide 19.
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Affiliation(s)
- I Bajza
- Institute of Biochemistry, Lajos Kossuth University, Debrecen, Hungary
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39
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Kerékgyártó J, Lipták A. Stereoselective preparation of dioxolane-type endo-benzylidene acetals by kinetically controlled reactions. Carbohydr Res 1993. [DOI: 10.1016/0008-6215(93)84142-s] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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