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Xu H, Schaugaard RN, Li J, Schlegel HB, Nguyen HM. Stereoselective 1,2- cis Furanosylations Catalyzed by Phenanthroline. J Am Chem Soc 2022; 144:7441-7456. [PMID: 35413194 DOI: 10.1021/jacs.2c02063] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Stereoselective formation of the 1,2-cis furanosidic linkage, a motif of many biologically relevant oligosaccharides and polysaccharides, remains an important synthetic challenge. We herein report a new stereoselective 1,2-cis furanosylation method promoted by phenanthroline catalysts under mild and operationally simple conditions. NMR experiments and density functional theory calculations support an associative mechanism in which the rate-determining step occurs from an inverted displacement of the faster-reacting phenanthrolinium ion intermediate with an alcohol nucleophile. The phenanthroline catalysis system is applicable to a number of furanosyl bromide donors to provide the challenging 1,2-cis substitution products in good yield with high anomeric selectivities. While arabinofuranosyl bromide provides β-1,2-cis products, xylo- and ribofuranosyl bromides favor α-1,2-cis products.
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Affiliation(s)
- Hengfu Xu
- Department of Chemistry, Wayne State University, Detroit, Michigan 48202, United States
| | - Richard N Schaugaard
- Department of Chemistry, Wayne State University, Detroit, Michigan 48202, United States
| | - Jiayi Li
- Department of Chemistry, Wayne State University, Detroit, Michigan 48202, United States
| | - H Bernhard Schlegel
- Department of Chemistry, Wayne State University, Detroit, Michigan 48202, United States
| | - Hien M Nguyen
- Department of Chemistry, Wayne State University, Detroit, Michigan 48202, United States
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2
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Jeanneret RA, Johnson SE, Galan MC. Conformationally Constrained Glycosyl Donors as Tools to Control Glycosylation Outcomes. J Org Chem 2020; 85:15801-15826. [DOI: 10.1021/acs.joc.0c02045] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Robin A. Jeanneret
- School of Chemistry, University of Bristol, Cantock’s
Close, Bristol BS8 1TS, United Kingdom
| | - Simon E. Johnson
- School of Chemistry, University of Bristol, Cantock’s
Close, Bristol BS8 1TS, United Kingdom
| | - M. Carmen Galan
- School of Chemistry, University of Bristol, Cantock’s
Close, Bristol BS8 1TS, United Kingdom
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3
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Mayfield AB, Metternich JB, Trotta AH, Jacobsen EN. Stereospecific Furanosylations Catalyzed by Bis-thiourea Hydrogen-Bond Donors. J Am Chem Soc 2020; 142:4061-4069. [PMID: 32013410 DOI: 10.1021/jacs.0c00335] [Citation(s) in RCA: 43] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
We report a new method for stereoselective O-furanosylation reactions promoted by a precisely tailored bis-thiourea hydrogen-bond-donor catalyst. Furanosyl donors outfitted with an anomeric dialkylphosphate leaving group undergo substitution with high anomeric selectivity, providing access to the challenging 1,2-cis substitution pattern with a range of alcohol acceptors. A variety of stereochemically distinct, benzyl-protected glycosyl donors were engaged successfully as substrates. Mechanistic studies support a stereospecific mechanism in which rate-determining substitution occurs from a catalyst-donor resting-state complex.
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Affiliation(s)
- Andrew B Mayfield
- Department of Chemistry & Chemical Biology , Harvard University , Cambridge , Massachusetts 02138 , United States
| | - Jan B Metternich
- Department of Chemistry & Chemical Biology , Harvard University , Cambridge , Massachusetts 02138 , United States
| | - Adam H Trotta
- Department of Chemistry & Chemical Biology , Harvard University , Cambridge , Massachusetts 02138 , United States
| | - Eric N Jacobsen
- Department of Chemistry & Chemical Biology , Harvard University , Cambridge , Massachusetts 02138 , United States
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4
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Zhang L, Shen K, Taha HA, Lowary TL. Stereocontrolled Synthesis of α-Xylofuranosides Using a Conformationally Restricted Donor. J Org Chem 2018. [PMID: 29895148 DOI: 10.1021/acs.joc.8b00410.] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A number of biologically relevant glycoconjugates possess 1,2- cis-furanosidic linkages, a class of glycosidic bond that remains challenging to introduce with high stereoselectivity. In this paper, we report an approach to one family of such linkages, α-xylofuranosides, via the use of thioglycoside donors possessing a conformationally restricting xylylene protecting group. The method was shown to provide the desired targets in good to excellent yield and stereoselectivity. Computational investigations support the proposal that the protecting group locks the electrophilic intermediate in these reactions into a conformation that leads to the high selectivity. The power of the methodology was demonstrated through the synthesis of a complex hexasaccharide motif from lipoarabinomannan, an immunomodulatory polysaccharide from mycobacteria.
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Affiliation(s)
- Li Zhang
- Alberta Glycomics Centre and Department of Chemistry , University of Alberta , 11227 Saskatchewan Drive , Edmonton , Alberta T6G 2G2 , Canada
| | - Ke Shen
- Alberta Glycomics Centre and Department of Chemistry , University of Alberta , 11227 Saskatchewan Drive , Edmonton , Alberta T6G 2G2 , Canada
| | - Hashem A Taha
- Alberta Glycomics Centre and Department of Chemistry , University of Alberta , 11227 Saskatchewan Drive , Edmonton , Alberta T6G 2G2 , Canada
| | - Todd L Lowary
- Alberta Glycomics Centre and Department of Chemistry , University of Alberta , 11227 Saskatchewan Drive , Edmonton , Alberta T6G 2G2 , Canada
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5
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Zhang L, Shen K, Taha HA, Lowary TL. Stereocontrolled Synthesis of α-Xylofuranosides Using a Conformationally Restricted Donor. J Org Chem 2018; 83:7659-7671. [PMID: 29895148 PMCID: PMC6079929 DOI: 10.1021/acs.joc.8b00410] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
![]()
A number of biologically relevant
glycoconjugates possess 1,2-cis-furanosidic linkages,
a class of glycosidic bond that
remains challenging to introduce with high stereoselectivity. In this
paper, we report an approach to one family of such linkages, α-xylofuranosides,
via the use of thioglycoside donors possessing a conformationally
restricting xylylene protecting group. The method was shown to provide
the desired targets in good to excellent yield and stereoselectivity.
Computational investigations support the proposal that the protecting
group locks the electrophilic intermediate in these reactions into
a conformation that leads to the high selectivity. The power of the
methodology was demonstrated through the synthesis of a complex hexasaccharide
motif from lipoarabinomannan, an immunomodulatory polysaccharide from
mycobacteria.
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Affiliation(s)
- Li Zhang
- Alberta Glycomics Centre and Department of Chemistry , University of Alberta , 11227 Saskatchewan Drive , Edmonton , Alberta T6G 2G2 , Canada
| | - Ke Shen
- Alberta Glycomics Centre and Department of Chemistry , University of Alberta , 11227 Saskatchewan Drive , Edmonton , Alberta T6G 2G2 , Canada
| | - Hashem A Taha
- Alberta Glycomics Centre and Department of Chemistry , University of Alberta , 11227 Saskatchewan Drive , Edmonton , Alberta T6G 2G2 , Canada
| | - Todd L Lowary
- Alberta Glycomics Centre and Department of Chemistry , University of Alberta , 11227 Saskatchewan Drive , Edmonton , Alberta T6G 2G2 , Canada
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6
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Tilve MJ, Cori CR, Gallo-Rodriguez C. Regioselective 5-O-Opening of Conformationally Locked 3,5-O-Di-tert-butylsilylene-d-galactofuranosides. Synthesis of (1→5)-β-d-Galactofuranosyl Derivatives. J Org Chem 2016; 81:9585-9594. [PMID: 27673745 DOI: 10.1021/acs.joc.6b01562] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The use of thiogalactofuranoside as donors for the construction of internal Galf containing oligosaccharide is limited, probably due to the difficulty to functionalize thiogalactofuranoside derivatives showing O-2, O-3, and O-5 with similar reactivity. An efficient method for complete regioselective 5-O-opening of conformationally restricted 3,5-O-di-tert-butylsilylene-d-galactofuranoside derivatives was developed. The use of a solution nBu4NF (1.1 equiv) in CH2Cl2 on 6 gave the 5-OH free derivative 10 as the only product (90%). 3-O-Di-tert-butylhydroxysilyl derivative 10 was stable upon purification and glycosylation reaction. Preactivation of conformationally restricted thioglycoside 6 employing p-NO2-benzensulfenyl chloride/AgOTf followed by condensation over the 5-OH thioglycoside acceptor 10 gave the corresponding disaccharide 12 without autocondensation byproduct. Regioselective 5-O-deprotection was also successfully performed over the (1→5)-β-d-galactofuranosyl di- and trisaccharide derivatives 12 and 13. This methodology allowed the differentiation between the secondary hydroxyl groups OH-3 and OH-5 of 1,2-cis or 1,2-trans d-galactofuranoside derivatives, and it still constitutes an innovative approach to access oligosaccharides of pharmacological importance.
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Affiliation(s)
- Mariano J Tilve
- CIHIDECAR, Universidad de Buenos Aires, Facultad de Ciencias Exactas y Naturales, Departamento de Química Orgánica, Ciudad Universitaria , Pabellón II, 1428 Buenos Aires, Argentina
| | - Carmen R Cori
- CIHIDECAR, Universidad de Buenos Aires, Facultad de Ciencias Exactas y Naturales, Departamento de Química Orgánica, Ciudad Universitaria , Pabellón II, 1428 Buenos Aires, Argentina
| | - Carola Gallo-Rodriguez
- CIHIDECAR, Universidad de Buenos Aires, Facultad de Ciencias Exactas y Naturales, Departamento de Química Orgánica, Ciudad Universitaria , Pabellón II, 1428 Buenos Aires, Argentina
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7
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Imamura A, Matsuzawa N, Sakai S, Udagawa T, Nakashima S, Ando H, Ishida H, Kiso M. The Origin of High Stereoselectivity in Di-tert-butylsilylene-Directed α-Galactosylation. J Org Chem 2016; 81:9086-9104. [DOI: 10.1021/acs.joc.6b01685] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Akihiro Imamura
- Department
of Applied Bio-organic Chemistry, Faculty of Applied Biological Sciences, Gifu University, 1-1 Yanagido, Gifu 501-1193, Japan
| | - Naomi Matsuzawa
- Department
of Applied Bio-organic Chemistry, Faculty of Applied Biological Sciences, Gifu University, 1-1 Yanagido, Gifu 501-1193, Japan
| | - Shizuo Sakai
- Department
of Applied Bio-organic Chemistry, Faculty of Applied Biological Sciences, Gifu University, 1-1 Yanagido, Gifu 501-1193, Japan
| | - Taro Udagawa
- Department
of Chemistry and Biomolecular Science, Faculty of Engineering, Gifu University, 1-1 Yanagido, Gifu 501-1193, Japan
| | - Shinya Nakashima
- Department
of Applied Bio-organic Chemistry, Faculty of Applied Biological Sciences, Gifu University, 1-1 Yanagido, Gifu 501-1193, Japan
| | - Hiromune Ando
- Department
of Applied Bio-organic Chemistry, Faculty of Applied Biological Sciences, Gifu University, 1-1 Yanagido, Gifu 501-1193, Japan
- Institute
for Integrated Cell-Material Sciences (WPI-iCeMS), Kyoto University, Yoshida
Ushinomiya-cho, Sakyo-ku, Kyoto 606-8501, Japan
| | - Hideharu Ishida
- Department
of Applied Bio-organic Chemistry, Faculty of Applied Biological Sciences, Gifu University, 1-1 Yanagido, Gifu 501-1193, Japan
| | - Makoto Kiso
- Department
of Applied Bio-organic Chemistry, Faculty of Applied Biological Sciences, Gifu University, 1-1 Yanagido, Gifu 501-1193, Japan
- Institute
for Integrated Cell-Material Sciences (WPI-iCeMS), Kyoto University, Yoshida
Ushinomiya-cho, Sakyo-ku, Kyoto 606-8501, Japan
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8
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Gao PC, Zhu SY, Cao H, Yang JS. Total Synthesis of Marine Glycosphingolipid Vesparioside B. J Am Chem Soc 2016; 138:1684-8. [PMID: 26784371 DOI: 10.1021/jacs.5b12589] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Affiliation(s)
- Peng-Cheng Gao
- Department
of Chemistry of Medicinal Natural Products, and Key Laboratory of
Drug Targeting, Ministry of Education, West China School of Pharmacy, Sichuan University, Chengdu 610041, China
| | - San-Yong Zhu
- Department
of Chemistry of Medicinal Natural Products, and Key Laboratory of
Drug Targeting, Ministry of Education, West China School of Pharmacy, Sichuan University, Chengdu 610041, China
| | - Hui Cao
- Department
of Chemistry of Medicinal Natural Products, and Key Laboratory of
Drug Targeting, Ministry of Education, West China School of Pharmacy, Sichuan University, Chengdu 610041, China
| | - Jin-Song Yang
- Department
of Chemistry of Medicinal Natural Products, and Key Laboratory of
Drug Targeting, Ministry of Education, West China School of Pharmacy, Sichuan University, Chengdu 610041, China
- State
Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu 610041, China
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9
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Saudi M, van Aerschot A. A straightforward diphenylmethyl protection method and deprotection of some pyrimidine nucleosides. Molecules 2013; 18:8524-34. [PMID: 23873390 PMCID: PMC6270414 DOI: 10.3390/molecules18078524] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2013] [Revised: 07/10/2013] [Accepted: 07/16/2013] [Indexed: 01/10/2023] Open
Abstract
Benzhydryl protection of primary and secondary alcohols has been reported previously via reaction with metal alcoholates. Our aim was to find generally useful and very mild conditions for the alcoholic protection and deprotection of nucleosides with the diphenylmethyl group. This was accomplished for some pyrimidine nucleosides using PdCl₂ as the transition metal catalyst, and with optimization yields of 70-90% have been achieved. A lack of solubility of other nucleosides hampers its more general use.
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Affiliation(s)
| | - Arthur van Aerschot
- Author to whom correspondence should be addressed; E-Mail: ; Tel.: +32-16-337-388; Fax: +32-16-337-340
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