101
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van der Vorm S, Hansen T, Overkleeft HS, van der Marel GA, Codée JDC. The influence of acceptor nucleophilicity on the glycosylation reaction mechanism. Chem Sci 2017; 8:1867-1875. [PMID: 28553477 PMCID: PMC5424809 DOI: 10.1039/c6sc04638j] [Citation(s) in RCA: 117] [Impact Index Per Article: 16.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2016] [Accepted: 11/08/2016] [Indexed: 01/20/2023] Open
Abstract
A set of model nucleophiles of gradually changing nucleophilicity is used to probe the glycosylation reaction mechanism. Glycosylations of ethanol-based acceptors, bearing varying amounts of fluorine atoms, report on the dependency of the stereochemistry in condensation reactions on the nucleophilicity of the acceptor. Three different glycosylation systems were scrutinized, that differ in the reaction mechanism, that - putatively - prevails during the coupling reaction. It is revealed that the stereoselectivity in glycosylations of benzylidene protected glucose donors are very susceptible to acceptor nucleophilicity whereas condensations of benzylidene mannose and mannuronic acid donors represent more robust glycosylation systems in terms of diastereoselectivity. The change in stereoselectivity with decreasing acceptor nucleophilicity is related to a change in reaction mechanism shifting from the SN2 side to the SN1 side of the reactivity spectrum. Carbohydrate acceptors are examined and the reactivity-selectivity profile of these nucleophiles mirrored those of the model acceptors studied. The set of model ethanol acceptors thus provides a simple and effective "toolbox" to investigate glycosylation reaction mechanisms and report on the robustness of glycosylation protocols.
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Affiliation(s)
- S van der Vorm
- Leiden Institute of Chemistry , Leiden University , Einsteinweg 55 , 2333 CC Leiden , The Netherlands .
| | - T Hansen
- Leiden Institute of Chemistry , Leiden University , Einsteinweg 55 , 2333 CC Leiden , The Netherlands .
| | - H S Overkleeft
- Leiden Institute of Chemistry , Leiden University , Einsteinweg 55 , 2333 CC Leiden , The Netherlands .
| | - G A van der Marel
- Leiden Institute of Chemistry , Leiden University , Einsteinweg 55 , 2333 CC Leiden , The Netherlands .
| | - J D C Codée
- Leiden Institute of Chemistry , Leiden University , Einsteinweg 55 , 2333 CC Leiden , The Netherlands .
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102
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Zhou J, Lv S, Zhang D, Xia F, Hu W. Deactivating Influence of 3-O-Glycosyl Substituent on Anomeric Reactivity of Thiomannoside Observed in Oligomannoside Synthesis. J Org Chem 2017; 82:2599-2621. [DOI: 10.1021/acs.joc.6b03017] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Affiliation(s)
- Jun Zhou
- Shanghai Engineering Research
Center of Molecular Therapeutics and New Drug Development, School
of Chemistry and Molecular Engineering, East China Normal University, 3663 North Zhongshan Road, Shanghai 200062, China
| | - Siying Lv
- Shanghai Engineering Research
Center of Molecular Therapeutics and New Drug Development, School
of Chemistry and Molecular Engineering, East China Normal University, 3663 North Zhongshan Road, Shanghai 200062, China
| | - Dan Zhang
- Shanghai Engineering Research
Center of Molecular Therapeutics and New Drug Development, School
of Chemistry and Molecular Engineering, East China Normal University, 3663 North Zhongshan Road, Shanghai 200062, China
| | - Fei Xia
- Shanghai Engineering Research
Center of Molecular Therapeutics and New Drug Development, School
of Chemistry and Molecular Engineering, East China Normal University, 3663 North Zhongshan Road, Shanghai 200062, China
| | - Wenhao Hu
- Shanghai Engineering Research
Center of Molecular Therapeutics and New Drug Development, School
of Chemistry and Molecular Engineering, East China Normal University, 3663 North Zhongshan Road, Shanghai 200062, China
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103
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Bandara MD, Yasomanee JP, Rath NP, Pedersen CM, Bols M, Demchenko AV. Conformationally superarmed S-ethyl glycosyl donors as effective building blocks for chemoselective oligosaccharide synthesis in one pot. Org Biomol Chem 2017; 15:559-563. [PMID: 27942674 PMCID: PMC5496005 DOI: 10.1039/c6ob02498j] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
A new series of superarmed glycosyl donors has been investigated. It was demonstrated that the S-ethyl leaving group allows for high reactivity, which is much higher than that of equally equipped S-phenyl glycosyl donors that were previously investigated by our groups. The superarmed S-ethyl glycosyl donors equipped with a 2-O-benzoyl group gave complete β-stereoselectivity. Utility of the new glycosyl donors has been demonstrated in a one-pot one-addition oligosaccharide synthesis with all of the reaction components present from the beginning.
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Affiliation(s)
- Mithila D Bandara
- Department of Chemistry and Biochemistry, University of Missouri - St. Louis, One University Boulevard, St. Louis, Missouri 63121, USA.
| | - Jagodige P Yasomanee
- Department of Chemistry and Biochemistry, University of Missouri - St. Louis, One University Boulevard, St. Louis, Missouri 63121, USA.
| | - Nigam P Rath
- Department of Chemistry and Biochemistry, University of Missouri - St. Louis, One University Boulevard, St. Louis, Missouri 63121, USA.
| | | | - Mikael Bols
- Department of Chemistry, University of Copenhagen, 2100 Copenhagen Ø, Denmark
| | - Alexei V Demchenko
- Department of Chemistry and Biochemistry, University of Missouri - St. Louis, One University Boulevard, St. Louis, Missouri 63121, USA.
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104
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Hagen B, Ali S, Overkleeft HS, van der Marel GA, Codée JDC. Mapping the Reactivity and Selectivity of 2-Azidofucosyl Donors for the Assembly of N-Acetylfucosamine-Containing Bacterial Oligosaccharides. J Org Chem 2017; 82:848-868. [PMID: 28051314 PMCID: PMC5332126 DOI: 10.1021/acs.joc.6b02593] [Citation(s) in RCA: 42] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
The synthesis of complex oligosaccharides is often hindered by a lack of knowledge on the reactivity and selectivity of their constituent building blocks. We investigated the reactivity and selectivity of 2-azidofucosyl (FucN3) donors, valuable synthons in the synthesis of 2-acetamido-2-deoxyfucose (FucNAc) containing oligosaccharides. Six FucN3 donors, bearing benzyl, benzoyl, or tert-butyldimethylsilyl protecting groups at the C3-O and C4-O positions, were synthesized, and their reactivity was assessed in a series of glycosylations using acceptors of varying nucleophilicity and size. It was found that more reactive nucleophiles and electron-withdrawing benzoyl groups on the donor favor the formation of β-glycosides, while poorly reactive nucleophiles and electron-donating protecting groups on the donor favor α-glycosidic bond formation. Low-temperature NMR activation studies of Bn- and Bz-protected donors revealed the formation of covalent FucN3 triflates and oxosulfonium triflates. From these results, a mechanistic explanation is offered in which more reactive acceptors preferentially react via an SN2-like pathway, while less reactive acceptors react via an SN1-like pathway. The knowledge obtained in this reactivity study was then applied in the construction of α-FucN3 linkages relevant to bacterial saccharides. Finally, a modular synthesis of the Staphylococcus aureus type 5 capsular polysaccharide repeating unit, a trisaccharide consisting of two FucNAc units, is described.
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Affiliation(s)
- Bas Hagen
- Leiden Institute of Chemistry, Universiteit Leiden , Einsteinweg 55, 2333CC Leiden, The Netherlands
| | - Sara Ali
- Leiden Institute of Chemistry, Universiteit Leiden , Einsteinweg 55, 2333CC Leiden, The Netherlands
| | - Herman S Overkleeft
- Leiden Institute of Chemistry, Universiteit Leiden , Einsteinweg 55, 2333CC Leiden, The Netherlands
| | - Gijsbert A van der Marel
- Leiden Institute of Chemistry, Universiteit Leiden , Einsteinweg 55, 2333CC Leiden, The Netherlands
| | - Jeroen D C Codée
- Leiden Institute of Chemistry, Universiteit Leiden , Einsteinweg 55, 2333CC Leiden, The Netherlands
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105
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Abstract
Glycosylation using Tf2NH or Tf2NTMS as the catalysts and a trichloroacetimidate donor gives glycosides with inverted anomeric stereochemistry.
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Affiliation(s)
- K. Kowalska
- Department of Chemistry
- University of Copenhagen
- Universitetsparken 5
- DK-2100 Copenhagen
- Denmark
| | - C. M. Pedersen
- Department of Chemistry
- University of Copenhagen
- Universitetsparken 5
- DK-2100 Copenhagen
- Denmark
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106
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107
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Heuckendorff M, Jensen HH. On the Gluco/Manno Paradox: Practical α-Glucosylations by NIS/TfOH Activation of 4,6-O
-Tethered Thioglucoside Donors. European J Org Chem 2016. [DOI: 10.1002/ejoc.201600899] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Mads Heuckendorff
- Department of Chemistry; Aarhus University; Langelandsgade 140 8000 Aarhus C Denmark
| | - Henrik H. Jensen
- Department of Chemistry; Aarhus University; Langelandsgade 140 8000 Aarhus C Denmark
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108
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Mensink RA, Elferink H, White PB, Pers N, Rutjes FPJT, Boltje TJ. A Study on Stereoselective Glycosylations via Sulfonium Ion Intermediates. European J Org Chem 2016. [DOI: 10.1002/ejoc.201600898] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Rens A. Mensink
- Synthetic organic chemistry; Institute for Molecules and Materials; Heyendaalseweg 135 Nijmegen The Netherlands
| | - Hidde Elferink
- Synthetic organic chemistry; Institute for Molecules and Materials; Heyendaalseweg 135 Nijmegen The Netherlands
| | - Paul B. White
- Synthetic organic chemistry; Institute for Molecules and Materials; Heyendaalseweg 135 Nijmegen The Netherlands
| | - Nathalie Pers
- Synthetic organic chemistry; Institute for Molecules and Materials; Heyendaalseweg 135 Nijmegen The Netherlands
| | - Floris P. J. T. Rutjes
- Synthetic organic chemistry; Institute for Molecules and Materials; Heyendaalseweg 135 Nijmegen The Netherlands
| | - Thomas J. Boltje
- Synthetic organic chemistry; Institute for Molecules and Materials; Heyendaalseweg 135 Nijmegen The Netherlands
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109
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Mishra KB, Tiwari VK. One-Pot Facile Synthesis of 1,5-Disubstituted Triazolyl Glycoconjugates from Nitrostyrenes. ChemistrySelect 2016. [DOI: 10.1002/slct.201600994] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Kunj B. Mishra
- Department of Chemistry, Institute of Science; Banaras Hindu University; Varanasi- 221005 India
| | - Vinod K. Tiwari
- Department of Chemistry, Institute of Science; Banaras Hindu University; Varanasi- 221005 India
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110
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D’Angelo KA, Taylor MS. Borinic Acid Catalyzed Stereo- and Regioselective Couplings of Glycosyl Methanesulfonates. J Am Chem Soc 2016; 138:11058-66. [DOI: 10.1021/jacs.6b06943] [Citation(s) in RCA: 91] [Impact Index Per Article: 11.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Kyan A. D’Angelo
- Department
of Chemistry, University of Toronto, 80 St. George Street, Toronto, Ontario M5S 3H6, Canada
| | - Mark S. Taylor
- Department
of Chemistry, University of Toronto, 80 St. George Street, Toronto, Ontario M5S 3H6, Canada
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111
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Vibhute AM, Dhaka A, Athiyarath V, Sureshan KM. A versatile glycosylation strategy via Au(iii) catalyzed activation of thioglycoside donors. Chem Sci 2016; 7:4259-4263. [PMID: 30090287 PMCID: PMC6054025 DOI: 10.1039/c6sc00633g] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2016] [Accepted: 03/04/2016] [Indexed: 12/15/2022] Open
Abstract
Among various methods of chemical glycosylations, glycosylation by activation of thioglycoside donors using a thiophilic promoter is an important strategy. Many promoters have been developed for the activation of thioglycosides. However, incompatibility with substrates having alkenes and the requirement of a stoichiometric amount of promoters, co-promoters and extreme temperatures are some of the limitations. We have developed an efficient methodology for glycosylation via the activation of thioglycoside donors using a catalytic amount of AuCl3 and without any co-promoter. The reaction is very fast, high-yielding and very facile at room temperature. The versatility of this method is evident from the facile glycosylation with both armed and disarmed donors and sterically demanding substrates (acceptors/donors) at ambient conditions, from the stability of the common protecting groups, and from the compatibility of alkene-containing substrates during the reaction.
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Affiliation(s)
- Amol M Vibhute
- School of Chemistry , Indian Institute of Science Education and Research , Thiruvananthapuram , KERALA-695016 , India . ; http://kms514.wix.com/kmsgroup
| | - Arun Dhaka
- School of Chemistry , Indian Institute of Science Education and Research , Thiruvananthapuram , KERALA-695016 , India . ; http://kms514.wix.com/kmsgroup
| | - Vignesh Athiyarath
- School of Chemistry , Indian Institute of Science Education and Research , Thiruvananthapuram , KERALA-695016 , India . ; http://kms514.wix.com/kmsgroup
| | - Kana M Sureshan
- School of Chemistry , Indian Institute of Science Education and Research , Thiruvananthapuram , KERALA-695016 , India . ; http://kms514.wix.com/kmsgroup
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112
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Goswami M, Ashley DC, Baik MH, Pohl NLB. Mechanistic Studies of Bismuth(V)-Mediated Thioglycoside Activation Reveal Differential Reactivity of Anomers. J Org Chem 2016; 81:5949-62. [PMID: 27295299 DOI: 10.1021/acs.joc.6b00860] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The mechanism of bismuth(V)-mediated thioglycoside activation was examined using reaction kinetics and quantum chemical reaction models. NMR experiments show an unusual nonlinear growth/decay curve for the glycosylation reaction. Further studies suggest an anomeric inversion of the β-glycoside donor to the α-donor during its activation, even in the presence of a neighboring 2-position acetate. Interestingly, in situ anomerization was not observed in the activation of an α-glycoside donor, and this anomer also showed faster reaction times and higher product diastereoselectivites. Density functional theory calculations identify the structure of the promoter triphenyl bismuth ditriflate, [Ph3Bi(OTf)2, 1], in solution and map out the energetics of its interactions with the two thioglycoside anomers. These calculations suggest that 1 must bind the thiopropyl arm to induce triflate loss. The computational analyses also show that, unlike most O-glycosides, the β- and α-donor S-glycosides are similar in energy. One energetically reasonable anomerization pathway of the donors is an SN1-like mechanism promoted by forming a bismuth-sulfonium adduct with the Lewis acidic Bi(V) for the formation of an oxacarbenium intermediate. Finally, the computed energy compensations needed to form these α vs β Bi adducts is a possible explanation for the differential reactivity of these donors.
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Affiliation(s)
- Manibarsha Goswami
- Department of Chemistry, Iowa State University , Ames, Iowa 50011, United States
| | - Daniel C Ashley
- Department of Chemistry, Indiana University , Bloomington, Indiana 47405, United States
| | - Mu-Hyun Baik
- Department of Chemistry, Indiana University , Bloomington, Indiana 47405, United States.,Center for Catalytic Hydrocarbon Functionalizations, Institute for Basic Science (IBS) , Daejeon 305-701, Korea.,Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST) , Daejeon 305-701, Korea
| | - Nicola L B Pohl
- Department of Chemistry, Indiana University , Bloomington, Indiana 47405, United States.,Department of Chemical and Biological Engineering, Iowa State University , Ames, Iowa 50011, United States
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113
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Affiliation(s)
- Tobias Gylling Frihed
- Max-Planck-Institut für Kohlenforschung; Kaiser-Wilhelm Platz 1 45470 Mülheim an der Ruhr Germany
| | - Mikael Bols
- Department of Chemistry; University of Copenhagen; Universitetsparken 5 2100 Copenhagen Denmark
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114
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Dharuman S, Crich D. Determination of the Influence of Side-Chain Conformation on Glycosylation Selectivity using Conformationally Restricted Donors. Chemistry 2016; 22:4535-42. [PMID: 26880055 PMCID: PMC4792696 DOI: 10.1002/chem.201505019] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2015] [Indexed: 01/28/2023]
Abstract
The synthesis of a series of conformationally locked mannopyranosyl thioglycosides in which the C6-O6 bond adopts either the gauche,gauche, gauche,trans, or trans,gauche conformation is described, and their influence on glycosylation stereoselectivity investigated. Two 4,6-O-benzylidene-protected mannosyl thioglycosides carrying axial or equatorial methyl groups at the 6-position were also synthesized and the selectivity of their glycosylation reactions studied to enable a distinction to be made between steric and stereoelectronic effects. The presence of an axial methoxy group at C6 in the bicyclic donor results in a decreased preference for formation of the β-mannoside, whereas an axial methyl group has little effect on selectivity. The result is rationalized in terms of through-space stabilization of a transient intermediate oxocarbenium ion by the axial methoxy group resulting in a higher degree of SN 1-like character in the glycosylation reaction. Comparisons are made with literature examples and exceptions are discussed in terms of pervading steric effects layered on top of the basic stereoelectronic effect.
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Affiliation(s)
- Suresh Dharuman
- Department of Chemistry, Wayne State University, Detroit, MI, 48202, USA
| | - David Crich
- Department of Chemistry, Wayne State University, Detroit, MI, 48202, USA.
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115
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Angles d'Ortoli T, Widmalm G. Synthesis of the tetrasaccharide glycoside moiety of Solaradixine and rapid NMR-based structure verification using the program CASPER. Tetrahedron 2016. [DOI: 10.1016/j.tet.2015.12.042] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
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116
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Beaver MG, Buscagan TM, Lavinda O, Woerpel KA. Stereoelectronic Model To Explain Highly Stereoselective Reactions of Seven-Membered-Ring Oxocarbenium-Ion Intermediates. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201507806] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
| | - Trixia M. Buscagan
- Department of Chemistry and Chemical Engineering; California Institute of Technology; 1200 E. California Blvd, MNC 101-20 Pasadena CA 91125 USA
| | - Olga Lavinda
- Department of Chemistry; New York University; 100 Washington Square East New York NY 10003 USA
| | - K. A. Woerpel
- Department of Chemistry; New York University; 100 Washington Square East New York NY 10003 USA
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117
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118
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Beaver MG, Buscagan TM, Lavinda O, Woerpel KA. Stereoelectronic Model To Explain Highly Stereoselective Reactions of Seven-Membered-Ring Oxocarbenium-Ion Intermediates. Angew Chem Int Ed Engl 2016; 55:1816-9. [PMID: 26791884 DOI: 10.1002/anie.201507806] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2015] [Revised: 10/20/2015] [Indexed: 11/11/2022]
Abstract
Nucleophilic attack on seven-membered-ring oxocarbenium ions is generally highly stereoselective. The preferred mode of nucleophilic attack forms the product in a conformation that minimizes transannular interactions, thus leading to different stereoselectivity as compared to that of reactions involving six-membered-ring oxocarbenium ions.
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Affiliation(s)
| | - Trixia M Buscagan
- Department of Chemistry and Chemical Engineering, California Institute of Technology, 1200 E. California Blvd, MNC 101-20, Pasadena, CA, 91125, USA
| | - Olga Lavinda
- Department of Chemistry, New York University, 100 Washington Square East, New York, NY, 10003, USA
| | - K A Woerpel
- Department of Chemistry, New York University, 100 Washington Square East, New York, NY, 10003, USA.
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119
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Qiao Y, Ge W, Jia L, Hou X, Wang Y, Pedersen CM. Glycosylation intermediates studied using low temperature1H- and19F-DOSY NMR: new insight into the activation of trichloroacetimidates. Chem Commun (Camb) 2016; 52:11418-11421. [DOI: 10.1039/c6cc05272j] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Low temperature1H- and19F-DOSY have been used for analyzing reactive intermediates in glycosylation reactions, where a glycosyl trichloroacetimidate donor has been activated using different catalysts.
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Affiliation(s)
- Yan Qiao
- Analytical Instrumentation Center & State Key Laboratory of Coal Conversion
- Institute of Coal Chemistry
- Chinese Academy of Sciences
- Taiyuan 030001
- People's Republic of China
| | - Wenzhi Ge
- Analytical Instrumentation Center & State Key Laboratory of Coal Conversion
- Institute of Coal Chemistry
- Chinese Academy of Sciences
- Taiyuan 030001
- People's Republic of China
| | - Lingyu Jia
- Shanxi Engineering Research Center of Biorefinery
- Institute of Coal Chemistry
- Chinese Academy of Sciences
- Taiyuan 030001
- People's Republic of China
| | - Xianglin Hou
- Shanxi Engineering Research Center of Biorefinery
- Institute of Coal Chemistry
- Chinese Academy of Sciences
- Taiyuan 030001
- People's Republic of China
| | - Yingxiong Wang
- Shanxi Engineering Research Center of Biorefinery
- Institute of Coal Chemistry
- Chinese Academy of Sciences
- Taiyuan 030001
- People's Republic of China
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120
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Mao RZ, Xiong DC, Guo F, Li Q, Duan J, Ye XS. Light-driven highly efficient glycosylation reactions. Org Chem Front 2016. [DOI: 10.1039/c6qo00021e] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A novel and efficient light-driven glycosylation strategy was developed with wide substrate scope/generality.
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Affiliation(s)
- Run-Ze Mao
- State Key Laboratory of Natural and Biomimetic Drugs
- School of Pharmaceutical Sciences
- Peking University
- Beijing 100191
- China
| | - De-Cai Xiong
- State Key Laboratory of Natural and Biomimetic Drugs
- School of Pharmaceutical Sciences
- Peking University
- Beijing 100191
- China
| | - Fan Guo
- State Key Laboratory of Natural and Biomimetic Drugs
- School of Pharmaceutical Sciences
- Peking University
- Beijing 100191
- China
| | - Qin Li
- State Key Laboratory of Natural and Biomimetic Drugs
- School of Pharmaceutical Sciences
- Peking University
- Beijing 100191
- China
| | - Jinyou Duan
- College of Science
- Northwest A&F University
- Yangling
- China
| | - Xin-Shan Ye
- State Key Laboratory of Natural and Biomimetic Drugs
- School of Pharmaceutical Sciences
- Peking University
- Beijing 100191
- China
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121
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Catching elusive glycosyl cations in a condensed phase with HF/SbF5 superacid. Nat Chem 2015; 8:186-91. [DOI: 10.1038/nchem.2399] [Citation(s) in RCA: 103] [Impact Index Per Article: 11.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2015] [Accepted: 10/13/2015] [Indexed: 01/22/2023]
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122
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Mao RZ, Guo F, Xiong DC, Li Q, Duan J, Ye XS. Photoinduced C–S Bond Cleavage of Thioglycosides and Glycosylation. Org Lett 2015; 17:5606-9. [DOI: 10.1021/acs.orglett.5b02823] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Affiliation(s)
- Run-Ze Mao
- State
Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical
Sciences, Peking University, Xue Yuan Road No. 38, Beijing 100191, China
| | - Fan Guo
- State
Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical
Sciences, Peking University, Xue Yuan Road No. 38, Beijing 100191, China
- College of Science, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - De-Cai Xiong
- State
Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical
Sciences, Peking University, Xue Yuan Road No. 38, Beijing 100191, China
| | - Qin Li
- State
Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical
Sciences, Peking University, Xue Yuan Road No. 38, Beijing 100191, China
| | - Jinyou Duan
- College of Science, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Xin-Shan Ye
- State
Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical
Sciences, Peking University, Xue Yuan Road No. 38, Beijing 100191, China
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123
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Adero PO, Furukawa T, Huang M, Mukherjee D, Retailleau P, Bohé L, Crich D. Cation Clock Reactions for the Determination of Relative Reaction Kinetics in Glycosylation Reactions: Applications to Gluco- and Mannopyranosyl Sulfoxide and Trichloroacetimidate Type Donors. J Am Chem Soc 2015; 137:10336-45. [PMID: 26207807 PMCID: PMC4545385 DOI: 10.1021/jacs.5b06126] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
The development of a cation clock method based on the intramolecular Sakurai reaction for probing the concentration dependence of the nucleophile in glycosylation reactions is described. The method is developed for the sulfoxide and trichloroacetimidate glycosylation protocols. The method reveals that O-glycosylation reactions have stronger concentration dependencies than C-glycosylation reactions consistent with a more associative, S(N)2-like character. For the 4,6-O-benzylidene-directed mannosylation reaction a significant difference in concentration dependence is found for the formation of the β- and α-anomers, suggesting a difference in mechanism and a rationale for the optimization of selectivity regardless of the type of donor employed. In the mannose series the cyclization reaction employed as clock results in the formation of cis and trans-fused oxabicyclo[4,4,0]decanes as products with the latter being strongly indicative of the involvement of a conformationally mobile transient glycosyl oxocarbenium ion. With identical protecting group arrays cyclization in the glucopyranose series is more rapid than in the mannopyranose manifold. The potential application of related clock reactions in other carbenium ion-based branches of organic synthesis is considered.
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Affiliation(s)
- Philip O. Adero
- Department of Chemistry, Wayne State University, 5101 Cass Avenue Detroit, MI 48202, USA
| | - Takayuki Furukawa
- Department of Chemistry, Wayne State University, 5101 Cass Avenue Detroit, MI 48202, USA
| | - Min Huang
- Institut de Chimie des Substances Naturelles, CNRS-ICSN UPR2301, Université Paris-Sud, Avenue de la Terrasse, 91198 Gif-sur-Yvette, France
| | - Debaraj Mukherjee
- Department of Chemistry, Wayne State University, 5101 Cass Avenue Detroit, MI 48202, USA
| | - Pascal Retailleau
- Institut de Chimie des Substances Naturelles, CNRS-ICSN UPR2301, Université Paris-Sud, Avenue de la Terrasse, 91198 Gif-sur-Yvette, France
| | - Luis Bohé
- Institut de Chimie des Substances Naturelles, CNRS-ICSN UPR2301, Université Paris-Sud, Avenue de la Terrasse, 91198 Gif-sur-Yvette, France
| | - David Crich
- Department of Chemistry, Wayne State University, 5101 Cass Avenue Detroit, MI 48202, USA
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