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Wei MM, Ma YF, Zhang GL, Li Q, Xiong DC, Ye XS. Urea-catalyzed N-Glycosylation of Amides/Azacycles with Glycosyl Halides. Chem Asian J 2023; 18:e202300791. [PMID: 37843982 DOI: 10.1002/asia.202300791] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2023] [Revised: 10/14/2023] [Accepted: 10/16/2023] [Indexed: 10/18/2023]
Abstract
The efficient synthesis of N-glycosides via direct N-glycosylation of amides/azacycles has been reported. The glycosylation of amides/azacycles with glycosyl halides in the presence of a catalytic amount of urea proceeded smoothly to provide the corresponding N-glycosylated amides or nucleosides in good to excellent yields with 1,2-trans-stereoselectivity. Moreover, by the addition of terpyridine, the 1,2-cis-stereoselectivity was achieved.
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Affiliation(s)
- Meng-Man Wei
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, and Chemical Biology Center, Peking University, Xue Yuan Road No.38, Beijing, 100191, China
| | - Yu-Feng Ma
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, and Chemical Biology Center, Peking University, Xue Yuan Road No.38, Beijing, 100191, China
| | - Gao-Lan Zhang
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, and Chemical Biology Center, Peking University, Xue Yuan Road No.38, Beijing, 100191, China
| | - Qin Li
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, and Chemical Biology Center, Peking University, Xue Yuan Road No.38, Beijing, 100191, China
| | - De-Cai Xiong
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, and Chemical Biology Center, Peking University, Xue Yuan Road No.38, Beijing, 100191, China
| | - Xin-Shan Ye
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, and Chemical Biology Center, Peking University, Xue Yuan Road No.38, Beijing, 100191, China
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2
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Rosado LM, Meyerhoefer TJ, Bett SM, Ilyas S, Bululu L, Martin CA, Joseph TW, De Castro M. Direct Coupling of Amides and Urea to Glycosyl Halides Using Silver Triflate. European J Org Chem 2016. [DOI: 10.1002/ejoc.201600350] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Luz M. Rosado
- Chemistry Department; Farmingdale State College-SUNY; 2350 Broadhollow Rd. 11735 Farmingdale NY USA
| | - Terence J. Meyerhoefer
- Chemistry Department; Farmingdale State College-SUNY; 2350 Broadhollow Rd. 11735 Farmingdale NY USA
| | - Saqib M. Bett
- Chemistry Department; Farmingdale State College-SUNY; 2350 Broadhollow Rd. 11735 Farmingdale NY USA
| | - Saba. Ilyas
- Chemistry Department; Farmingdale State College-SUNY; 2350 Broadhollow Rd. 11735 Farmingdale NY USA
| | - Lubabalo. Bululu
- Chemistry Department; Farmingdale State College-SUNY; 2350 Broadhollow Rd. 11735 Farmingdale NY USA
| | - Carla A. Martin
- Chemistry Department; Farmingdale State College-SUNY; 2350 Broadhollow Rd. 11735 Farmingdale NY USA
| | - Troy W. Joseph
- Touro College; School of Health and Sciences; 1700 Union Blvd. 11706 Bay Shore NY USA
| | - Michael De Castro
- Chemistry Department; Farmingdale State College-SUNY; 2350 Broadhollow Rd. 11735 Farmingdale NY USA
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3
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Meyerhoefer TJ, Kershaw S, Caliendo N, Eltayeb S, Hanawa-Romero E, Bykovskaya P, Huang V, Marzabadi CH, De Castro M. A Practical Synthesis of Various 2-Deoxy-N-glycosides by UsingD-Glucal. European J Org Chem 2015. [DOI: 10.1002/ejoc.201500001] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
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4
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Paul KJ, Sahoo L, Loganathan D. A novel strategy toward the synthesis of N-(β-glycosyl)asparagines based on the alkylation of ethyl nitroacetate using N-(β-glycosyl)iodoacetamides. Tetrahedron Lett 2010. [DOI: 10.1016/j.tetlet.2010.08.072] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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5
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Reaction of N-Fmoc aspartic anhydride with glycosylamines: a simple entry to N-glycosyl asparagines. Tetrahedron Lett 2009. [DOI: 10.1016/j.tetlet.2009.08.106] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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6
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Barghash RF, Massi A, Dondoni A. Synthesis of thiourea-tethered C-glycosyl amino acids via isothiocyanate–amine coupling. Org Biomol Chem 2009; 7:3319-30. [DOI: 10.1039/b908156a] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
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7
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Yang J, Mercer GJ, Nguyen HM. Palladium-catalyzed glycal imidate rearrangement: formation of alpha- and beta-N-glycosyl trichloroacetamides. Org Lett 2007; 9:4231-4. [PMID: 17880097 DOI: 10.1021/ol701778z] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A novel palladium(II)-catalyzed stereoselective synthesis of alpha- and beta-N-glycosyl trichloroacetamides has been developed. The alpha- and beta-selectivity at the anomeric carbon depends on the nature of the palladium-ligand catalyst. While the cationic palladium(II) promotes the alpha-selectivity, the neutral palladium(II) favors the beta-selectivity.
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Affiliation(s)
- Jaemoon Yang
- Department of Chemistry and Biochemistry, Montana State University, Bozeman, Montana 59717, USA
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8
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Blanco JLJ, Sylla B, Mellet CO, Fernández JMG. Synthesis of α- and β-Glycosyl Isothiocyanates via Oxazoline Intermediates. J Org Chem 2007; 72:4547-50. [PMID: 17497800 DOI: 10.1021/jo062419z] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A practical synthesis of acylated glycosyl isothiocyanates from sugar oxazolines, by reaction with thiophosgene, is reported. In the absence of any additive, the reaction is governed by the reverse anomeric effect, leading to the equatorially oriented isothiocyanate. However, in the presence of copper(II) chloride, the reaction proceeds preferentially with retention of the configuration at the anomeric center, providing the axial anomer as the major product. Noteworthy, this strategy allows accessing per-O-acetylated glycopyranosyl isothiocyanates with 1,2-cis relative configuration (e.g., the alpha-anomer in the D-gluco and D-galacto series), a problem that was outside the scope of previous methodologies.
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Affiliation(s)
- José L Jiménez Blanco
- Departamento de Química OrgAnica, Facultad de Química, Universidad de Sevilla, Apartado 553, E-41071 Sevilla, Spain
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Kumar V, Ramesh NG. A versatile strategy for the synthesis of N-linked glycoamino acids from glycals. Org Biomol Chem 2007; 5:3847-58. [DOI: 10.1039/b712841j] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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10
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Maljaars C, Halkes K, de Oude W, van der Poel S, Pijnenburg N, Kamerling J. Preparation of S‐ and N‐Linked Glycosylated Amino Acid Building Blocks for Solid‐phase Glycopeptide Library Synthesis*. J Carbohydr Chem 2005. [DOI: 10.1081/car-200066915] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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11
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An easy access to anomeric glycosyl amides and imines(Schiff bases) via transformation of glycopyranosyl trimethylphosphinimides. Tetrahedron 2001. [DOI: 10.1016/s0040-4020(01)00380-5] [Citation(s) in RCA: 48] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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12
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Isac-García J, Calvo-Flores F, Hernández-Mateo F, Santoyo-González F. Synthesis of Glycosylamines from Glycosyl Isothiocyanates and Bis(tributyltin) Oxide. European J Org Chem 2001. [DOI: 10.1002/1099-0690(200101)2001:2<383::aid-ejoc383>3.0.co;2-n] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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13
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Abstract
Despite the omnipresence of protein glycosylation in nature, little is known about how the attachment of carbohydrates affects peptide and protein activity. One reason is the lack of a straightforward method to access biologically relevant glycopeptides and glycoproteins. The isolation of homogeneous glycopeptides from natural sources is complicated by the heterogeneity of naturally occuring glycoproteins. It is chemical and chemoenzymatic synthesis that is meeting the challenge to solve this availability problem, thus playing a key role for the advancement of glycobiology. The current art of glycopeptide synthesis, albeit far from being routine, has reached a level of maturity that allows for the access to homogeneous and pure material for biological and medicinal research. Even the ambitious goal of the total synthesis of an entire glycoprotein is within reach. It is demonstrated that with the help of synthetic glycopeptides the effects of glycosylation on protein structure and function can be studied in molecular detail. For example, in immunology, synthetic (tumour-specific) glycopeptides can be used as immunogens to elicit a tumour-cell-specific immune response. Again, synthetic glycopeptides are an invaluable tool to determine the fine specificity of the immune response that can be mediated by both carbohydrate-specific B and T cells. Furthermore, selected examples for the use of synthetic glycopeptides as ligands of carbohydrate-binding proteins and as enzyme substrates or inhibitors are presented.
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Affiliation(s)
- O Seitz
- Department of Chemical Biology Max-Planck-Institut für molekulare Physiologie Otto-Hahn-Strasse 11, 44227 Dortmund, Germany.
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14
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García Fernández J, Mellet CO. Chemistry and developments of N-thiocarbonyl carbohydrate derivatives: Sugar isothiocyanates, thioamides, thioureas, thiocarbamates, and their conjugates. Adv Carbohydr Chem Biochem 2000. [DOI: 10.1016/s0065-2318(00)55004-5] [Citation(s) in RCA: 64] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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15
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Gama Y, Shibuya I, Shimizu M. Silver Ion Mediated Desulfurization-Condensation of Glucosyl Isothiocyanate With Hydroxy Acids. J Carbohydr Chem 2000. [DOI: 10.1080/07328300008544069] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Gama Y, Shibuya I, Shimizu M. Synthesis Of Glucosylamino Heterocycles By Desulfurization-Condensation Of Glucosyl Isothiocyanates With Jv-Substituted Amino Acids. SYNTHETIC COMMUN 1999. [DOI: 10.1080/00397919908086129] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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18
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Ősz E, Szilágyi L, Somsák L, Bényei A. Syntheses of novel glycosylidene-spiro-heterocycles related to hydantocidin. Tetrahedron 1999. [DOI: 10.1016/s0040-4020(99)00034-4] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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20
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Fan JQ, Lee YC. Detailed studies on substrate structure requirements of glycoamidases A and F. J Biol Chem 1997; 272:27058-64. [PMID: 9341145 DOI: 10.1074/jbc.272.43.27058] [Citation(s) in RCA: 57] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
Abstract
Glycoamidases (peptide-N4-(N-acetyl-beta-glucosaminyl)asparagine amidase, EC 3.5.1.52; also known as peptide: N-glycanases (PNGases) release N-linked oligosaccharides from glycopeptides and/or glycoproteins by hydrolyzing the glycosylated beta-amide bond of the asparagine side chain. The most widely used glycoamidases are those from Flavobacterium meningosepticum (glycoamidase F or PNGase F) and almond emulsin (glycoamidase A or PNGase A). To study the substrate structure requirement of these enzymes systematically, we synthesized >30 glycopeptides containing cellobiose, lactose, GlcNAc, and di-N,N'-acetylchitobiose (CTB). The length of the peptide was varied from one to five amino acids, and glycosylamines were linked to either Asn or Gln located at different positions in the peptide, including NH2 and COOH termini. Neither enzyme could cleave cellobiose and lactose glycopeptides, indicating that the 2-acetamido group on the Asn-linked GlcNAc is important in the recognition by both glycoamidases A and F. GlcNAc peptides could be cleaved by both enzymes, albeit not as effectively as CTB glycopeptides. Neither enzyme requires the Asn-Xaa-(Ser/Thr) sequence (required for N-glycosylation) for activity. Glycoamidase A could even hydrolyze a Gln-bound CTB glycopeptide, whereas the action of glycoamidase F on this substrate is minimal. While glycoamidase A could act on CTB dipeptides, glycoamidase F preferred a tripeptide or longer. The Km and Vmax values of glycoamidase A for t-butoxycarbonyl-(CTB)-Asn-Ala-Ser-OMe were 2.1 mM and 0.66 micromol/min/mg, respectively. A natural glycodipeptide, Man9-GlcNAc2-Asn-Phe, was also completely hydrolyzed by glycoamidase A.
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Affiliation(s)
- J Q Fan
- Department of Biology, The Johns Hopkins University, Baltimore, Maryland 21218, USA
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21
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Unverzagt C. Chemoenzymatische Synthese eines sialylierten Undecasaccharid-Asparagins. Angew Chem Int Ed Engl 1996. [DOI: 10.1002/ange.19961082012] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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22
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23
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García Fernández JM, Ortiz Mellet C, Jiménez Blanco JL, Fuentes Mota J, Gadelle A, Coste-Sarguet A, Defaye J. Isothiocyanates and cyclic thiocarbamates of alpha,alpha'-trehalose, sucrose, and cyclomaltooligosaccharides. Carbohydr Res 1995; 268:57-71. [PMID: 7736467 DOI: 10.1016/0008-6215(94)00312-4] [Citation(s) in RCA: 79] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
6,6'-Dideoxy-6,6'-diisothiocyanato-alpha,alpha'-trehalose (4), 6-deoxy-6-isothiocyanato-alpha-D-fructo-furanose beta-D-fructopyranose 1,2':2,1'-dianhydride (11), 6,6'-dideoxy-6,6'-diisothiocyanatosucrose (16), and per(6-deoxy-6-isothiocyanato)-cyclomaltohexaose (23), -cyclomaltoheptaose (27), and -cyclomaltooctaose (31) have been prepared in high yield by reaction of the corresponding amino sugars with thiophosgene. In the absence of base, all isothiocyanates were stable and could be stored and acetylated without decomposition. In the presence of triethylamine, 6,6'-dideoxy-6,6'-diisothiocyanato-alpha,alpha'-trehalose underwent intramolecular cyclisation involving HO-4 to give the corresponding bis(cyclic thiocarbamate). The product of cyclisation at a single glucopyranosyl unit was obtained in the treatment of the above diisothiocyanate with mixed (H+, HO-) ion-exchange resin. Under identical reaction conditions, 6,6'-dideoxy-6,6'-diisothiocyanatosucrose yielded exclusively the product of intramolecular cyclisation at the D-glucopyranosyl moiety, while derivatives of alpha-D-fructofuranose beta-D-fructopyranose 1,2':2,1'-dianhydride and cyclomaltooligosaccharides remained unchanged.
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Affiliation(s)
- J M García Fernández
- Departamento de Química Orgánica, Facultad de Química, Universidad de Sevilla, Spain
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24
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Chapter 4 Chemical Synthesis of Glycopeptides. ACTA ACUST UNITED AC 1995. [DOI: 10.1016/s0167-7306(08)60588-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register]
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25
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Abstract
Progress recently made in the synthesis of biologically relevant N- and O-glycopeptides is illustrated by examples. In this context, developments in the preparation of complex saccharide side chains and in the subsequent coupling to peptide portions is described. Special emphasis is given to the synthesis of Lewis antigen-type structures. Furthermore, modern methods in solid phase peptide syntheses utilizing glycosylated building blocks are presented. Recent advances in glycopeptide syntheses employing enzymatic methods in deprotection steps as well as in peptide/saccharide chain elongation are reported.
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Affiliation(s)
- M Schultz
- Institut für Organische Chemie, Johannes Gutenberg-Universität, Mainz, Germany
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26
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Santoyo-González F, García-Calvo-Flores F, Isac-García J, Hernández-Mateo F, García-Mendoza P, Robles-Díaz R. Synthesis and transformations of 2-deoxy-2-iodo-pyranosyl isothiocyanates from glycals. Tetrahedron 1994. [DOI: 10.1016/s0040-4020(01)87000-9] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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27
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Garg HG, von dem Bruch K, Kunz H. Developments in the synthesis of glycopeptides containing glycosyl L-asparagine, L-serine, and L-threonine. Adv Carbohydr Chem Biochem 1994; 50:277-310. [PMID: 7942256 DOI: 10.1016/s0065-2318(08)60153-5] [Citation(s) in RCA: 67] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Affiliation(s)
- H G Garg
- Department of Medicine, Massachusetts General Hospital, Harvard Medical School, Boston 02114
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28
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Tri-O-benzoyl-β-l-rhamnopyranosyl and β-l-fucopyranosyl isothiocyanates. Partially protected β-l-rhamnopyranosylenamines. Carbohydr Res 1993. [DOI: 10.1016/0008-6215(93)84250-a] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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29
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Mellet CO, Blanco JLJ, Fernández JMG, Fuentes J. Building Blocks for Glycopeptide Synthesis. Disaccharide Glycosyl Isothiocyanates. J Carbohydr Chem 1993. [DOI: 10.1080/07328309308019403] [Citation(s) in RCA: 25] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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30
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Christiansen-Brams I, Meldal M, Bock K. Protected-mode synthesis of N-linked glycopeptides: single-step preparation of building blocks as peracetyl glycosylated NαFmoc asparagine OPfp esters. ACTA ACUST UNITED AC 1993. [DOI: 10.1039/p19930001461] [Citation(s) in RCA: 44] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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31
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32
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Leon-Ruaud P, Allainmat M, Plusquellec D. A new efficient acylation of free glycosylamines. Tetrahedron Lett 1991. [DOI: 10.1016/s0040-4039(00)74271-7] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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33
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Günther W, Kunz H. Synthese eines β-Mannosyl-Chitobiosyl-Asparagin-Konjugates—eines zentralen Elements der Core-Region vonN-Glycoproteinen. Angew Chem Int Ed Engl 1990. [DOI: 10.1002/ange.19901020915] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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34
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Avalos M, Babiano R, Cintas P, Jiménez JL, Palacios JC, Fuentes J. Synthesis of acylated thioureylenedisaccharides. ACTA ACUST UNITED AC 1990. [DOI: 10.1039/p19900000495] [Citation(s) in RCA: 24] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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35
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Meldal M, Book K. Pentafluorophenyl esters for temporary carboxyl group protection in solid phase synthesis of N-linked glycopeptides. Tetrahedron Lett 1990. [DOI: 10.1016/s0040-4039(00)97223-x] [Citation(s) in RCA: 55] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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36
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Witczak ZJ. Monosaccharide isothiocyanates and thiocyanates: synthesis, chemistry, and preparative applications. Adv Carbohydr Chem Biochem 1987; 44:91-145. [PMID: 3544702 DOI: 10.1016/s0065-2318(08)60078-5] [Citation(s) in RCA: 65] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
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37
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Babiano Caballero R, Fuentes Mota J, Galbis Perez JA. A new method for the preparation of acylated glycosylamines and their transformations into glycosyl isothiocyanates and N,N′-diglycosylthioureas. Carbohydr Res 1986. [DOI: 10.1016/s0008-6215(00)90042-9] [Citation(s) in RCA: 43] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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38
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New simple synthesis of 2-acetamido-2-deoxy-?-D-glucopyranosylamine and 2-acetamido-4-0-(2-acetamido-2-deoxy-?-D-glucopyranosyl)-2-deoxy-?-D-glucopyranosylamine and preparation of their N-acyl derivatives. Russ Chem Bull 1986. [DOI: 10.1007/bf00954837] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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39
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Garg HG, Jeanloz RW. Synthetic N- and O-glycosyl derivatives of L-asparagine, L-serine, and L-threonine. Adv Carbohydr Chem Biochem 1985; 43:135-201. [PMID: 3938177 DOI: 10.1016/s0065-2318(08)60068-2] [Citation(s) in RCA: 82] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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