351
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Tatina M, Yousuf SK, Mukherjee D. 2,4,6-Trichloro-1,3,5-triazine (TCT) mediated one-pot sequential functionalisation of glycosides for the generation of orthogonally protected monosaccharide building blocks. Org Biomol Chem 2012; 10:5357-60. [DOI: 10.1039/c2ob25452b] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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352
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Kaeothip S, Yasomanee JP, Demchenko AV. Glycosidation of thioglycosides in the presence of bromine: mechanism, reactivity, and stereoselectivity. J Org Chem 2011; 77:291-9. [PMID: 22136383 DOI: 10.1021/jo2019174] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Elaborating on previous studies by Lemieux for highly reactive "armed" bromides, we discovered that β-bromide of the superdisarmed (2-O-benzyl-3,4,6-tri-O-benzoyl) series can be directly obtained from the thioglycoside precursor. When this bromide is glycosidated, α-glycosides form exclusively; however, the yields of such transformations may be low due to the competing anomerization into α-bromide that is totally unreactive under the established reaction conditions.
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Affiliation(s)
- Sophon Kaeothip
- Department of Chemistry and Biochemistry, University of Missouri-St. Louis, One University Boulevard, St. Louis, Missouri 63121, United States
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353
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Codée JDC, Walvoort MTC, de Jong AR, Lodder G, Overkleeft HS, van der Marel GA. Mannuronic Acids: Reactivity and Selectivity. J Carbohydr Chem 2011. [DOI: 10.1080/07328303.2011.624284] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
Affiliation(s)
- Jeroen D. C. Codée
- a Leiden Institute of Chemistry , Leiden University , P.O. Box 9502, 2300 RA, Leiden , The Netherlands
| | - Marthe T. C. Walvoort
- a Leiden Institute of Chemistry , Leiden University , P.O. Box 9502, 2300 RA, Leiden , The Netherlands
| | - Ana-Rae de Jong
- a Leiden Institute of Chemistry , Leiden University , P.O. Box 9502, 2300 RA, Leiden , The Netherlands
| | - Gerrit Lodder
- a Leiden Institute of Chemistry , Leiden University , P.O. Box 9502, 2300 RA, Leiden , The Netherlands
| | - Herman S. Overkleeft
- a Leiden Institute of Chemistry , Leiden University , P.O. Box 9502, 2300 RA, Leiden , The Netherlands
| | - Gijsbert A. van der Marel
- a Leiden Institute of Chemistry , Leiden University , P.O. Box 9502, 2300 RA, Leiden , The Netherlands
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354
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Fascione MA, Kilner CA, Leach AG, Turnbull WB. Do glycosyl sulfonium ions engage in neighbouring-group participation? A study of oxathiane glycosyl donors and the basis for their stereoselectivity. Chemistry 2011; 18:321-33. [PMID: 22140005 DOI: 10.1002/chem.201101889] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2011] [Indexed: 11/08/2022]
Abstract
Neighbouring-group participation has long been used to control the synthesis of 1,2-trans-glycosides. More recently there has been a growing interest in the development of similar strategies for the synthesis of 1,2-cis-glycosides, in particular the use of auxiliary groups that generate sulfonium ion intermediates. However, there has been some debate over the role of sulfonium ion intermediates in these reactions: do sulfonium ions actually engage in neighbouring-group participation, or are they a resting state of the system prior to reaction through an oxacarbenium ion intermediate? Herein, we describe the reactivities and stereoselectivities of a family of bicyclic thioglycosides in which an oxathiane ring is fused to the sugar to form a trans-decalin-like structure. A methyl sulfonium ion derived from one such glycosyl donor is so stable that it can be crystallised from ethanol, yet it reacts with complete stereoselectivity at high temperature. The importance of a ketal group in the oxathiane ring for maintaining this high stereoselectivity is investigated using a combination of experiment and ab initio calculations. The data are discussed in terms of S(N)1 and S(N)2 type mechanisms. Trends in stereoselectivity across a series of compounds are more consistent with selective addition to oxacarbenium ions rather than a shift between S(N)1 and S(N)2 mechanisms.
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355
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Crich D. Methodology development and physical organic chemistry: a powerful combination for the advancement of glycochemistry. J Org Chem 2011; 76:9193-209. [PMID: 21919522 PMCID: PMC3215858 DOI: 10.1021/jo2017026] [Citation(s) in RCA: 98] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
This Perspective outlines work in the Crich group on the diastereoselective synthesis of the so-called difficult classes of glycosidic bond: the 2-deoxy-β-glycopyranosides, the β-mannopyranosides, the α-sialosides, the α-glucopyranosides, and the β-arabinofuranosides with an emphasis on the critical interplay between mechanism and methodology development.
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Affiliation(s)
- David Crich
- Department of Chemistry, Wayne State University, Detroit, Michigan 48202, USA.
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356
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Zhu X, Dere RT, Jiang J, Zhang L, Wang X. Synthesis of α-Glycosyl Thiols by Stereospecific Ring-Opening of 1,6-Anhydrosugars. J Org Chem 2011; 76:10187-97. [DOI: 10.1021/jo202069y] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Xiangming Zhu
- Centre for
Synthesis and Chemical Biology, UCD School of Chemistry and Chemical
Biology, University College Dublin, Belfield,
Dublin 4, Ireland
- College
of Chemistry and Life Sciences, Zhejiang Normal University, Jinhua 321004, China
| | - Ravindra T. Dere
- Centre for
Synthesis and Chemical Biology, UCD School of Chemistry and Chemical
Biology, University College Dublin, Belfield,
Dublin 4, Ireland
| | - Junyan Jiang
- College
of Chemistry and Life Sciences, Zhejiang Normal University, Jinhua 321004, China
| | - Lei Zhang
- College
of Chemistry and Life Sciences, Zhejiang Normal University, Jinhua 321004, China
| | - Xiaoxia Wang
- College
of Chemistry and Life Sciences, Zhejiang Normal University, Jinhua 321004, China
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357
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Affiliation(s)
- Ryan M Schmaltz
- The Department of Chemistry and Skaggs Institute for Chemical Biology, 10550 North Torrey Pines Road, La Jolla, California 92037, USA
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358
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Tilve MJ, Gallo-Rodriguez C. Glycosylation studies on conformationally restricted 3,5-O-(di-tert-butylsilylene)-D-galactofuranosyl trichloroacetimidate donors for 1,2-cis α-D-galactofuranosylation. Carbohydr Res 2011; 346:2838-48. [PMID: 22050997 DOI: 10.1016/j.carres.2011.10.004] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2011] [Revised: 10/03/2011] [Accepted: 10/04/2011] [Indexed: 10/16/2022]
Abstract
Conformationally restricted 3,5-O-di-tert-butylsilylene-D-galactofuranosyl trichloroacetimidate donors were synthesized from allyl α-D-galactofuranoside for the construction of 1,2-cis α-D-galactofuranosyl linkages. Glycosylation reactions were performed with several acceptors, including D-galactono-1,4-lactone, D-rhamnopyranosyl, and D-mannopyranosyl derivatives. The influence of the temperature and the reaction solvents was evaluated, as well as the 6-O-substitution pattern of the donor. The higher α-selectivities were obtained at -78 °C in diethyl ether as solvent. 6-O-Acetyl substitution on constrained donor increased the α-selectivity compared to the 6-O-benzyl substitution. Almost no selectivities were observed in the non-participating solvent CH(2)Cl(2). In contrast, ethereal solvents enhanced the α-selectivity suggesting a participating effect in the reaction intermediate.
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Affiliation(s)
- Mariano J Tilve
- CIHIDECAR, Departamento de Química Orgánica, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Universitaria, Pabellón II, 1428 Buenos Aires, Argentina
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359
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Crich D, Rahaman MY. Synthesis and structural verification of the xylomannan antifreeze substance from the freeze-tolerant Alaskan beetle Upis ceramboides. J Org Chem 2011; 76:8611-20. [PMID: 21955117 DOI: 10.1021/jo201780e] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Tetra-, hexa-, and octasaccharide subunits of the [→4)-β-D-Manp-(1→4)-β-D-Xylp-(1→](n) xylomannan motif proposed as the structure of a novel nonprotein, thermal hysteresis-producing antifreeze substance from the freeze-tolerant Alaskan beetle Upis ceramboides have been accessed by total chemical synthesis. Comparison of their NMR spectral data with data of the isolate lends strong support to the proposed structure. Synthetic tetrasaccharides representing various linkage isomers considered (α- rather than β-manno, and linkage through mannose O3 rather than O4) show more significant chemical shift differences with the isolate and are therefore excluded from further consideration.
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Affiliation(s)
- David Crich
- Department of Chemistry, Wayne State University, 5101 Cass Avenue, Detroit, Michigan 48202, United States.
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360
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Sanhueza CA, Dorta RL, Vázquez JT. Stereochemical Properties of Glucosyl Sulfoxides in Solution. J Org Chem 2011; 76:7769-80. [DOI: 10.1021/jo201130x] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Carlos A. Sanhueza
- Instituto Universitario de Bio-Orgánica “Antonio González”, Departamento de Química Orgánica, Universidad de La Laguna, 38206 La Laguna, Tenerife, Spain
| | - Rosa L. Dorta
- Instituto Universitario de Bio-Orgánica “Antonio González”, Departamento de Química Orgánica, Universidad de La Laguna, 38206 La Laguna, Tenerife, Spain
| | - Jesús T. Vázquez
- Instituto Universitario de Bio-Orgánica “Antonio González”, Departamento de Química Orgánica, Universidad de La Laguna, 38206 La Laguna, Tenerife, Spain
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361
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Gouliaras C, Lee D, Chan L, Taylor MS. Regioselective activation of glycosyl acceptors by a diarylborinic acid-derived catalyst. J Am Chem Soc 2011; 133:13926-9. [PMID: 21838223 DOI: 10.1021/ja2062715] [Citation(s) in RCA: 171] [Impact Index Per Article: 13.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A derivative of diphenylborinic acid promotes catalytic, regioselective Koenigs-Knorr glycosylations of carbohydrate derivatives bearing multiple secondary hydroxyl groups. Robust levels of selectivity for the equatorial OH group of cis-1,2-diol motifs are demonstrated in reactions of seven acceptors derived from galactose, mannose, fucose, and arabinose using a variety of glycosyl halide donors. Catalyst control presents a new means of generating defined glycosidic linkages from unprotected or minimally protected carbohydrate feedstocks.
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362
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Walvoort MTC, Moggré GJ, Lodder G, Overkleeft HS, Codée JDC, van der Marel GA. Stereoselective Synthesis of 2,3-Diamino-2,3-dideoxy-β-d-mannopyranosyl Uronates. J Org Chem 2011; 76:7301-15. [DOI: 10.1021/jo201179p] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Marthe T. C. Walvoort
- Leiden Institute of Chemistry, Leiden University, P.O. Box 9502, 2300 RA Leiden, The Netherlands
| | - Gert-Jan Moggré
- Leiden Institute of Chemistry, Leiden University, P.O. Box 9502, 2300 RA Leiden, The Netherlands
| | - Gerrit Lodder
- Leiden Institute of Chemistry, Leiden University, P.O. Box 9502, 2300 RA Leiden, The Netherlands
| | - Herman S. Overkleeft
- Leiden Institute of Chemistry, Leiden University, P.O. Box 9502, 2300 RA Leiden, The Netherlands
| | - Jeroen D. C. Codée
- Leiden Institute of Chemistry, Leiden University, P.O. Box 9502, 2300 RA Leiden, The Netherlands
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363
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Walvoort MTC, de Witte W, van Dijk J, Dinkelaar J, Lodder G, Overkleeft HS, Codée JDC, van der Marel GA. Mannopyranosyl uronic acid donor reactivity. Org Lett 2011; 13:4360-3. [PMID: 21776974 DOI: 10.1021/ol2016862] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
The reactivity of a variety of mannopyranosyl uronic acid donors was assessed in a set of competition experiments, in which two (S)-tolyl mannosyl donors were made to compete for a limited amount of promoter (NIS/TfOH). These experiments revealed that the reactivity of mannuronic acid donors is significantly higher than expected based on the electron-withdrawing capacity of the C-5 carboxylic acid ester function. A 4-O-acetyl-β-(S)-tolyl mannuronic acid donor was found to have similar reactivity as per-O-benzyl-α-(S)-tolyl mannose.
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Affiliation(s)
- Marthe T C Walvoort
- Leiden Institute of Chemistry, Leiden University, P.O. Box 9502, 2300 RA Leiden, The Netherlands
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364
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Zhu Y, Yu B. Characterization of the Isochromen-4-yl-gold(I) Intermediate in the Gold(I)-Catalyzed Glycosidation of Glycosyl ortho-Alkynylbenzoates and Enhancement of the Catalytic Efficiency Thereof. Angew Chem Int Ed Engl 2011; 50:8329-32. [DOI: 10.1002/anie.201103409] [Citation(s) in RCA: 125] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2011] [Indexed: 11/05/2022]
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365
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Zhu Y, Yu B. Characterization of the Isochromen-4-yl-gold(I) Intermediate in the Gold(I)-Catalyzed Glycosidation of Glycosyl ortho-Alkynylbenzoates and Enhancement of the Catalytic Efficiency Thereof. Angew Chem Int Ed Engl 2011. [DOI: 10.1002/ange.201103409] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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366
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Ma X, Tian Q, Tang Q, Zhao J, Shao H. A Novel and Highly Stereoselective Synthesis of 2-Substituted Perhydrofuro[2,3-b]pyran Derivatives. Org Lett 2011; 13:4276-9. [DOI: 10.1021/ol201622t] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Xiaofeng Ma
- Natural Products Research Center, Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, China, and Shanxi Agriculture University, Taigu Shanxi 030801, China and Graduate School of Chinese Academy of Sciences, China
| | - Qiang Tian
- Natural Products Research Center, Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, China, and Shanxi Agriculture University, Taigu Shanxi 030801, China and Graduate School of Chinese Academy of Sciences, China
| | - Qin Tang
- Natural Products Research Center, Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, China, and Shanxi Agriculture University, Taigu Shanxi 030801, China and Graduate School of Chinese Academy of Sciences, China
| | - Jinzhong Zhao
- Natural Products Research Center, Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, China, and Shanxi Agriculture University, Taigu Shanxi 030801, China and Graduate School of Chinese Academy of Sciences, China
| | - Huawu Shao
- Natural Products Research Center, Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, China, and Shanxi Agriculture University, Taigu Shanxi 030801, China and Graduate School of Chinese Academy of Sciences, China
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367
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Lichtenthaler FW. 2-Oxoglycosyl ("ulosyl") and 2-oximinoglycosyl bromides: versatile donors for the expedient assembly of oligosaccharides with β-D-mannose, β-L-rhamnose, N-acetyl-β-D-mannosamine, and N-acetyl-β-D-mannosaminuronic acid units. Chem Rev 2011; 111:5569-609. [PMID: 21751781 DOI: 10.1021/cr100444b] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Frieder W Lichtenthaler
- Clemens-Schöpf-Institut für Organische Chemie, Technische Universität Darmstadt, D-64287 Darmstadt, Germany.
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368
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Saito K, Saigusa Y, Nokami T, Yoshida JI. Electrochemically Generated ArS(ArSSAr)+B(C6F5)4−as an Activator of Thioglycosides for Glycosylation. CHEM LETT 2011. [DOI: 10.1246/cl.2011.678] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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369
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Kumar A, Kumar V, Dere RT, Schmidt RR. Glycoside Bond Formation via Acid–Base Catalysis. Org Lett 2011; 13:3612-5. [DOI: 10.1021/ol201231v] [Citation(s) in RCA: 71] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Amit Kumar
- Fachbereich Chemie, Universität Konstanz, Fach 725, D-78457 Konstanz, Germany
| | - Vipin Kumar
- Fachbereich Chemie, Universität Konstanz, Fach 725, D-78457 Konstanz, Germany
| | - Ravindra T. Dere
- Fachbereich Chemie, Universität Konstanz, Fach 725, D-78457 Konstanz, Germany
| | - Richard R. Schmidt
- Fachbereich Chemie, Universität Konstanz, Fach 725, D-78457 Konstanz, Germany
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370
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Mydock LK, Kamat MN, Demchenko AV. Direct synthesis of diastereomerically pure glycosyl sulfonium salts. Org Lett 2011; 13:2928-31. [PMID: 21563800 DOI: 10.1021/ol2009818] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
It is reported that stable glycosyl sulfonium salts can be generated via direct anomeric S-methylation of ethylthioglycosides. Mechanistically, this pathway represents the first step in the activation of thioglycosides for glycosidation; however, it can further allow for the synthesis and isolation of quasi-stable sulfonium ions, representing a new approach for studying these key intermediates.
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Affiliation(s)
- Laurel K Mydock
- Department of Chemistry and Biochemistry, University of Missouri-St. Louis, St. Louis, Missouri 63121, United States
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371
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Saha J, Peczuh MW. Expanding the Scope of Aminosugars: Synthesis of 2‐Amino Septanosyl Glycoconjugates Using Septanosyl Fluoride Donors. Chemistry 2011; 17:7357-65. [DOI: 10.1002/chem.201003721] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2010] [Revised: 03/21/2011] [Indexed: 01/25/2023]
Affiliation(s)
- Jaideep Saha
- Department of Chemistry, University of Connecticut, 55 North Eagleville Road, U‐3060, Storrs, CT 06269 (USA), Fax: (+1) 860‐486‐2981
| | - Mark W. Peczuh
- Department of Chemistry, University of Connecticut, 55 North Eagleville Road, U‐3060, Storrs, CT 06269 (USA), Fax: (+1) 860‐486‐2981
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372
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Amorim L, Marcelo F, Rousseau C, Nieto L, Jiménez‐Barbero J, Marrot J, Rauter AP, Sollogoub M, Bols M, Blériot Y. Direct Experimental Evidence for the High Chemical Reactivity of α‐ and β‐Xylopyranosides Adopting a
2,5
B
Conformation in Glycosyl Transfer. Chemistry 2011; 17:7345-56. [DOI: 10.1002/chem.201003251] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2010] [Indexed: 12/12/2022]
Affiliation(s)
- Luis Amorim
- UPMC Univ Paris 06, Institut Parisien de Chimie Moléculaire (UMR 7201), FR 2769, C181, 4 place Jussieu, 75005 Paris (France)
| | - Filipa Marcelo
- UPMC Univ Paris 06, Institut Parisien de Chimie Moléculaire (UMR 7201), FR 2769, C181, 4 place Jussieu, 75005 Paris (France)
- Carbohydrate Chemistry Group, CQB‐FCUL, Departamento de Química e Bioquímica, Faculdade de Ciências da Universidade de Lisboa, 1749‐016 Lisbon (Portugal)
| | - Cyril Rousseau
- Department of Chemistry, University of Copenhagen, Universitetsparken 5, 2100 Kbh Ø (Denmark)
- Present address: Université d'Artois, IUT de Béthune, UCCS Artois, UMR 8181, 1230 rue de l'Université, BP 819, 62408 Béthune cedex (France)
| | - Lidia Nieto
- Centro de Investigaciones Biológicas, CSIC, 28040 Madrid (Spain)
| | | | - Jérôme Marrot
- Institut Lavoisier, Université de Versailles‐Saint‐Quentin, UMR 8180, 78035 Versailles (France)
| | - Amélia P. Rauter
- Carbohydrate Chemistry Group, CQB‐FCUL, Departamento de Química e Bioquímica, Faculdade de Ciências da Universidade de Lisboa, 1749‐016 Lisbon (Portugal)
| | - Matthieu Sollogoub
- UPMC Univ Paris 06, Institut Parisien de Chimie Moléculaire (UMR 7201), FR 2769, C181, 4 place Jussieu, 75005 Paris (France)
| | - Mikael Bols
- Department of Chemistry, University of Copenhagen, Universitetsparken 5, 2100 Kbh Ø (Denmark)
| | - Yves Blériot
- UPMC Univ Paris 06, Institut Parisien de Chimie Moléculaire (UMR 7201), FR 2769, C181, 4 place Jussieu, 75005 Paris (France)
- Present address: Université de Poitiers, UMR 6514, Laboratoire “Synthèse et Réactivité des Substances Naturelles”, 40 avenue du Recteur Pineau, 86022 Poitiers Cedex (France)
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373
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Emmadi M, Kulkarni SS. Rapid transformation of D-mannose into orthogonally protected D-glucosamine and D-galactosamine thioglycosides. J Org Chem 2011; 76:4703-9. [PMID: 21510706 DOI: 10.1021/jo200342v] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
An expedient protocol for synthesis of orthogonally protected 2-azido-2-deoxy-D-glucosamine and 2-azido-2-deoxy-D-galactosamine donors from D-mannose is described. Readily available phenyl β-D-thiomannoside is rapidly transformed into D-GlcN(3) thioglycosides via a highly regioselective 3-O-acylation followed by 4,6-O-benzylidenation and azide displacement of C2-OTf, which is further converted into D-GalN(3) thioglycosides through Lattrell-Dax inversion of the C4 hydroxy group and its Boc protection. The reaction sequence may be completed in 2 days and involves simple workups and minimal column chromatography.
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Affiliation(s)
- Madhu Emmadi
- Department of Chemistry, Indian Institute of Technology Bombay, Mumbai, India
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374
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Saito K, Ueoka K, Matsumoto K, Suga S, Nokami T, Yoshida JI. Indirect Cation-Flow Method: Flash Generation of Alkoxycarbenium Ions and Studies on the Stability of Glycosyl Cations. Angew Chem Int Ed Engl 2011. [DOI: 10.1002/ange.201100854] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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375
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Saito K, Ueoka K, Matsumoto K, Suga S, Nokami T, Yoshida JI. Indirect Cation-Flow Method: Flash Generation of Alkoxycarbenium Ions and Studies on the Stability of Glycosyl Cations. Angew Chem Int Ed Engl 2011; 50:5153-6. [DOI: 10.1002/anie.201100854] [Citation(s) in RCA: 69] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2011] [Indexed: 11/05/2022]
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376
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Yan S, Li T, Yao L. Mutational Effects on the Catalytic Mechanism of Cellobiohydrolase I from Trichoderma reesei. J Phys Chem B 2011; 115:4982-9. [DOI: 10.1021/jp200384m] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Shihai Yan
- Key Lab of Biofuels, Qingdao Institute of Bioenergy
and Bioprocess Technology, Chinese Academy of Sciences, Qingdao 266101, PR China
| | - Tong Li
- Key Lab of Biofuels, Qingdao Institute of Bioenergy
and Bioprocess Technology, Chinese Academy of Sciences, Qingdao 266101, PR China
| | - Lishan Yao
- Key Lab of Biofuels, Qingdao Institute of Bioenergy
and Bioprocess Technology, Chinese Academy of Sciences, Qingdao 266101, PR China
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377
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Influence of the solvent in low temperature glycosylations with O-(2,3,5,6-tetra-O-benzyl-β-D-galactofuranosyl) trichloroacetimidate for 1,2-cis α-D-galactofuranosylation. Carbohydr Res 2011; 346:1495-502. [PMID: 21645887 DOI: 10.1016/j.carres.2011.04.005] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2011] [Revised: 03/31/2011] [Accepted: 04/04/2011] [Indexed: 11/22/2022]
Abstract
Glycosylation studies for the construction of 1,2-cis α-linkages with O-(2,3,5,6-tetra-O-benzyl-β-D-galactofuranosyl) trichloroacetimidate (1) and several acceptors, including D-mannosyl and l-rhamnosyl derivatives were performed. The reactions were conducted at low temperatures using CH(2)Cl(2), Et(2)O, and acetonitrile as solvents. A non-participating solvent such as CH(2)Cl(2) at -78°C, favored the α-D-configuration. In contrast, acetonitrile strongly favored the β-D-configuration, whereas no selectivities were observed with Et(2)O. The use of thiophene as an additive did not enhance the α-D-selectivity as in the pyranose counterpart. Although selectivities strongly depended on the acceptor, trichloroacetimidate 1 constitutes a valuable donor for the synthesis of α-D-Galf-(1→2)-l-Rha and α-D-Galf-(1→6)-D-Man. As these motifs are present in pathogenic microorganisms, these procedures described here are useful for the straightforward synthesis of natural oligosaccharides.
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378
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Upadhyay SK, Jursic BS. Preparation of tagged glucose as a key intermediate in the synthesis of branched oligosaccharides. Tetrahedron Lett 2011. [DOI: 10.1016/j.tetlet.2011.01.149] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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379
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Fujita S, Oka N, Matsumura F, Wada T. Synthesis of Oligo(α-d-glycosyl phosphate) Derivatives by a Phosphoramidite Method via Boranophosphate Intermediates. J Org Chem 2011; 76:2648-59. [DOI: 10.1021/jo102584g] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Shoichi Fujita
- Department of Medical Genome Sciences, Graduate School of Frontier Sciences, The University of Tokyo, Bioscience Building 702, 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8562, Japan
| | - Natsuhisa Oka
- Department of Medical Genome Sciences, Graduate School of Frontier Sciences, The University of Tokyo, Bioscience Building 702, 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8562, Japan
| | - Fumiko Matsumura
- Department of Medical Genome Sciences, Graduate School of Frontier Sciences, The University of Tokyo, Bioscience Building 702, 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8562, Japan
| | - Takeshi Wada
- Department of Medical Genome Sciences, Graduate School of Frontier Sciences, The University of Tokyo, Bioscience Building 702, 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8562, Japan
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380
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Satoh H, Manabe S, Ito Y, Lüthi HP, Laino T, Hutter J. Endocyclic cleavage in glycosides with 2,3-trans cyclic protecting groups. J Am Chem Soc 2011; 133:5610-9. [PMID: 21417469 DOI: 10.1021/ja201024a] [Citation(s) in RCA: 58] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
An endocyclic pathway is proposed as a reaction mechanism for the anomerization from the β (1,2-trans) to the α (1,2-cis) configuration observed in glycosides carrying 2,3-trans cyclic protecting groups. This reaction occurs in the presence of a weak Lewis or Brønsted acid, while endocyclic cleavage (endocleavage) in typical glycosides was observed only when mediated by protic media or strong Lewis acids. To rationalize the behavior of this class of compounds, the reaction mechanism and the promoting factors of the endocleavage are investigated using quantum-mechanical (QM) calculations and experimental studies. We examine anomerization reactions of thioglycosides carrying 2,3-trans cyclic protecting groups, employing boron trifluoride etherate (BF(3)·OEt(2)) as a Lewis acid. The estimated theoretical reactivity, based on a simple model to predict transition state (TS) energies from the strain caused by the fused rings, is very close to the TS energies calculated by the TS search along the C1-C2 bond rotation after the endo C-O bond breaking. Excellent agreement is found between the predicted TS energies and the experimental reactivity ranking. The series of calculations and experiments strongly supports the predominance of the endocyclic rather than the exocyclic mechanism. Furthermore, these investigations suggest that the inner strain is the primary factor enhancing the endocleavage reaction. The effect of the cyclic protecting group in restricting the pyranoside ring to a (4)C(1) conformation, extensively discussed in conjunction with the stereoelectronic effect theory, is shown to be a secondary factor.
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Affiliation(s)
- Hiroko Satoh
- National Institute of Informatics (NII), Tokyo 101-8430, Japan.
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381
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Vidadala SR, Pimpalpalle TM, Linker T, Hotha S. Gold-Catalyzed Reactions of 2-C-Branched Carbohydrates: Mild Glycosidations and Selective Anomerizations. European J Org Chem 2011. [DOI: 10.1002/ejoc.201100134] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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382
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Nokami T, Nozaki Y, Saigusa Y, Shibuya A, Manabe S, Ito Y, Yoshida JI. Glycosyl Sulfonium Ions as Storable Intermediates for Glycosylations. Org Lett 2011; 13:1544-7. [DOI: 10.1021/ol200242u] [Citation(s) in RCA: 56] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Toshiki Nokami
- Department of Synthetic Chemistry, Biological Chemistry, Graduate School of Engineering, Kyoto University, Nishikyo-ku, Kyoto 615-8510, Japan, RIKEN Advanced Science Institute, Hirosawa, Wako, Saitama 351-0198, Japan, and ERATO JST, Hirosawa, Wako, Saitama 351-0198, Japan
| | - Yuki Nozaki
- Department of Synthetic Chemistry, Biological Chemistry, Graduate School of Engineering, Kyoto University, Nishikyo-ku, Kyoto 615-8510, Japan, RIKEN Advanced Science Institute, Hirosawa, Wako, Saitama 351-0198, Japan, and ERATO JST, Hirosawa, Wako, Saitama 351-0198, Japan
| | - Yoshihiro Saigusa
- Department of Synthetic Chemistry, Biological Chemistry, Graduate School of Engineering, Kyoto University, Nishikyo-ku, Kyoto 615-8510, Japan, RIKEN Advanced Science Institute, Hirosawa, Wako, Saitama 351-0198, Japan, and ERATO JST, Hirosawa, Wako, Saitama 351-0198, Japan
| | - Akito Shibuya
- Department of Synthetic Chemistry, Biological Chemistry, Graduate School of Engineering, Kyoto University, Nishikyo-ku, Kyoto 615-8510, Japan, RIKEN Advanced Science Institute, Hirosawa, Wako, Saitama 351-0198, Japan, and ERATO JST, Hirosawa, Wako, Saitama 351-0198, Japan
| | - Shino Manabe
- Department of Synthetic Chemistry, Biological Chemistry, Graduate School of Engineering, Kyoto University, Nishikyo-ku, Kyoto 615-8510, Japan, RIKEN Advanced Science Institute, Hirosawa, Wako, Saitama 351-0198, Japan, and ERATO JST, Hirosawa, Wako, Saitama 351-0198, Japan
| | - Yukishige Ito
- Department of Synthetic Chemistry, Biological Chemistry, Graduate School of Engineering, Kyoto University, Nishikyo-ku, Kyoto 615-8510, Japan, RIKEN Advanced Science Institute, Hirosawa, Wako, Saitama 351-0198, Japan, and ERATO JST, Hirosawa, Wako, Saitama 351-0198, Japan
| | - Jun-ichi Yoshida
- Department of Synthetic Chemistry, Biological Chemistry, Graduate School of Engineering, Kyoto University, Nishikyo-ku, Kyoto 615-8510, Japan, RIKEN Advanced Science Institute, Hirosawa, Wako, Saitama 351-0198, Japan, and ERATO JST, Hirosawa, Wako, Saitama 351-0198, Japan
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383
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Boltje TJ, Kim JH, Park J, Boons GJ. Stereoelectronic effects determine oxacarbenium vs β-sulfonium ion mediated glycosylations. Org Lett 2011; 13:284-7. [PMID: 21158475 PMCID: PMC3076600 DOI: 10.1021/ol1027267] [Citation(s) in RCA: 56] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Activation of a glycosyl donor protected with a 2-O-(S)-(phenylthiomethyl)benzyl ether chiral auxiliary results in the formation of an anomeric β-sulfonium ion, which can be displaced with sugar alcohols to give corresponding α-glycosides. Sufficient deactivation of such glycosyl donors by electron-withdrawing protecting groups is, however, critical to avoid glycosylation of an oxacarbenium ion intermediate. The latter type of glycosylation pathway can also be suppressed by installing additional substituents in the chiral auxiliary.
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Affiliation(s)
- Thomas J. Boltje
- Complex Carbohydrate Research Center, University of Georgia, 315 Riverbend Road, Athens, Georgia 30602
| | - Jin-Hwan Kim
- Complex Carbohydrate Research Center, University of Georgia, 315 Riverbend Road, Athens, Georgia 30602
| | - Jin Park
- Complex Carbohydrate Research Center, University of Georgia, 315 Riverbend Road, Athens, Georgia 30602
| | - Geert-Jan Boons
- Complex Carbohydrate Research Center, University of Georgia, 315 Riverbend Road, Athens, Georgia 30602
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384
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Witschi MA, Gervay-Hague J. Selective acetylation of per-O-TMS-protected monosaccharides. Org Lett 2011; 12:4312-5. [PMID: 20799705 DOI: 10.1021/ol101751d] [Citation(s) in RCA: 49] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Selective acetylation of various per-O-TMS-protected carbohydrates has been accomplished. Using a protecting group exchange strategy and microwave assistance, monosaccharides (glucose, galactose, and mannose) can be selectively acetylated producing either the 6-O-monoacetate or 1,6-O-diacetylated species. This new class of molecules can be deprotected without migration of the acetyl groups, providing useful synthetic intermediates. To demonstrate the scope of the reaction, the methodology was successfully extended to TMS-protected ceramide.
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Affiliation(s)
- Mark A Witschi
- Department of Chemistry, University of California, Davis, 1 Shields Avenue, Davis, California 95616, USA
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385
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Hogendorf WFJ, Meeuwenoord N, Overkleeft HS, Filippov DV, Laverde D, Kropec A, Huebner J, Van der Marel GA, Codée JDC. Automated solid phase synthesis of teichoic acids. Chem Commun (Camb) 2011; 47:8961-3. [DOI: 10.1039/c1cc13132j] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
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386
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Colombo MI, Rúveda EA, Stortz CA. Regioselectivity of the glycosylation of N-dimethylmaleoyl-protected hexosamine acceptors. An experimental and DFT approach. Org Biomol Chem 2011; 9:3020-5. [DOI: 10.1039/c1ob00021g] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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387
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Manabe S, Ishii K, Ito Y. N-Benzyl-2,3-trans-Carbamate-Bearing Glycosyl Donors for 1,2-cis-Selective Glycosylation Reactions. European J Org Chem 2010. [DOI: 10.1002/ejoc.201001278] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
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388
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Liang PH, Lu YJ, Tang TH. A green and regioselective acetylation of thioglycoside with ethyl acetate. Tetrahedron Lett 2010. [DOI: 10.1016/j.tetlet.2010.10.135] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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389
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Ranade SC, Kaeothip S, Demchenko AV. Glycosyl alkoxythioimidates as complementary building blocks for chemical glycosylation. Org Lett 2010; 12:5628-31. [PMID: 21087037 DOI: 10.1021/ol1023079] [Citation(s) in RCA: 53] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
It is reported that S-glycosyl O-methyl phenylcarbamothioates (SNea carbamothioates) have a fully orthogonal character in comparison to S-benzoxazolyl (SBox) glycosides. This complete orthogonality was revealed by performing competitive glycosylation experiments in the presence of various promoters. The results obtained indicate that SNea carbamothioates have a very similar reactivity profile to that of glycosyl thiocyanates, yet are significantly more stable and tolerate selected protecting group manipulations. These features make the SNea carbamothioates new promising building blocks for further utilization in oligosaccharide synthesis.
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Affiliation(s)
- Sneha C Ranade
- Department of Chemistry and Biochemistry, University of Missouri-St. Louis, One University Boulevard, St. Louis, Missouri 63121, USA
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390
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Crich D, Sharma I. Influence of the O3 protecting group on stereoselectivity in the preparation of C-mannopyranosides with 4,6-O-benzylidene protected donors. J Org Chem 2010; 75:8383-91. [PMID: 21070063 DOI: 10.1021/jo101453y] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
α-C-Glucopyranosides and mannopyranosides are obtained in 65-85% yields from 4,6-O-benzylidene-protected glucosyl and mannosyl thioglycosides bearing ester functionality at the 3-O-position by a coupling reaction with C-nucleophiles on activation with diphenyl sulfoxide, 2,4,6-tri-tert-butylpyrimidine, and trifluoromethanesulfonic anhydride.
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Affiliation(s)
- David Crich
- Centre de Recherche de Gif, Institut de Chimie des Substances Naturelles, CNRS, Avenue de la Terrasse, 91198 Gif-sur-Yvette, France.
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391
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Díaz-Oltra S, Angulo-Pachón CA, Murga J, Falomir E, Carda M, Marco JA. Synthesis and biological properties of the cytotoxic 14-membered macrolides aspergillide A and B. Chemistry 2010; 17:675-88. [PMID: 21207589 DOI: 10.1002/chem.201001682] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2010] [Revised: 09/03/2010] [Indexed: 11/07/2022]
Abstract
Total, stereoselective syntheses of the naturally occurring, cytotoxic macrolides aspergillide A and B are described. Olefin metatheses and asymmetric allylations were key steps in the synthetic sequences. Cytotoxicity assays against several tumor cell lines have been performed for the two aspergillides and some of the intermediates or side products of the synthetic sequence. One of these intermediates has been found markedly active against the human leukemia cancer cell line HL-60, with an IC(50) value comparable with that of the clinical drug fludarabine.
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Affiliation(s)
- Santiago Díaz-Oltra
- Depart. de Q. Inorgánica y Orgánica, Univ. Jaume I, Avda. Sos Baynat s/n, 12071 Castellón, Spain
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392
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Guo J, Ye XS. Protecting groups in carbohydrate chemistry: influence on stereoselectivity of glycosylations. Molecules 2010; 15:7235-65. [PMID: 20966873 PMCID: PMC6259426 DOI: 10.3390/molecules15107235] [Citation(s) in RCA: 120] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2010] [Accepted: 10/15/2010] [Indexed: 11/16/2022] Open
Abstract
Saccharides are polyhydroxy compounds, and their synthesis requires complex protecting group manipulations. Protecting groups are usually used to temporarily mask a functional group which may interfere with a certain reaction, but protecting groups in carbohydrate chemistry do more than protecting groups usually do. Particularly, protecting groups can participate in reactions directly or indirectly, thus affecting the stereochemical outcomes, which is important for synthesis of oligosaccharides. Herein we present an overview of recent advances in protecting groups influencing stereoselectivity in glycosylation reactions, including participating protecting groups, and conformation-constraining protecting groups in general.
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Affiliation(s)
| | - Xin-Shan Ye
- Author to whom correspondence should be addressed; E-Mail: ; Tel.: +86 10-82801570; Fax: +86-10-62014949
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393
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394
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395
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Pilgrim W, Murphy PV. SnCl4- and TiCl4-Catalyzed Anomerization of Acylated O- and S-Glycosides: Analysis of Factors That Lead to Higher α:β Anomer Ratios and Reaction Rates. J Org Chem 2010; 75:6747-55. [DOI: 10.1021/jo101090f] [Citation(s) in RCA: 75] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Wayne Pilgrim
- School of Chemistry, National University of Ireland, Galway, Ireland
- Centre for Synthesis and Chemical Biology, School of Chemistry and Chemical Biology, University College Dublin, Belfield, Dublin 4, Ireland
| | - Paul V. Murphy
- School of Chemistry, National University of Ireland, Galway, Ireland
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396
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D’Alonzo D, Guaragna A, Van Aerschot A, Herdewijn P, Palumbo G. Toward l-Homo-DNA: Stereoselective de Novo Synthesis of β-l-erythro-Hexopyranosyl Nucleosides. J Org Chem 2010; 75:6402-10. [DOI: 10.1021/jo100691y] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Daniele D’Alonzo
- Dipartimento di Chimica Organica e Biochimica, Università di Napoli Federico II, via Cinthia 4, I-80126 Napoli, Italy
| | - Annalisa Guaragna
- Dipartimento di Chimica Organica e Biochimica, Università di Napoli Federico II, via Cinthia 4, I-80126 Napoli, Italy
| | - Arthur Van Aerschot
- Katholieke Universiteit Leuven, Rega Institute for Medical Research, Minderbroederstraat 10, B-3000 Leuven, Belgium
| | - Piet Herdewijn
- Katholieke Universiteit Leuven, Rega Institute for Medical Research, Minderbroederstraat 10, B-3000 Leuven, Belgium
| | - Giovanni Palumbo
- Dipartimento di Chimica Organica e Biochimica, Università di Napoli Federico II, via Cinthia 4, I-80126 Napoli, Italy
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