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Yadav Y, Tyagi R, Yadav K, Tiwari G, Sagar R. Reinvestigation of SnCl 4 catalyzed efficient synthesis of 2,3-unsaturated glycopyranosides. Carbohydr Res 2023; 534:108989. [PMID: 38016255 DOI: 10.1016/j.carres.2023.108989] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2023] [Revised: 11/20/2023] [Accepted: 11/20/2023] [Indexed: 11/30/2023]
Abstract
The Ferrier rearrangement is a powerful tool to prepare 2,3-unsaturated glycopyranosides. We have reinvestigated SnCl4 catalyzed Ferrier rearrangements through direct allylic substitution of the hydroxyl group at the C-3 position of glycals, resulting in the formation of stereoselective 2,3-unsaturated glycosides at 0 °C. The catalytic amount of SnCl4 (0.1 equiv.) was successfully used to promote this transformation on 3,4,6-tri-O-acetyl-D-glucal, 3,4,6-tri-O-acetyl-D-galactal and 3,4-di-O-acetyl-D-arabinal using various nucleophiles viz alcohols, azide and thiols to form a variety of 2,3-unsaturated glycopyranosides (pseudoglycals). This straightforward process is notable for its strong anomeric selectivity, excellent yields and shorter reaction time.
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Affiliation(s)
- Yogesh Yadav
- Glycochemistry Laboratory, School of Physical Sciences, Jawaharlal Nehru University, New Delhi, 110067, India
| | - Rajdeep Tyagi
- Glycochemistry Laboratory, School of Physical Sciences, Jawaharlal Nehru University, New Delhi, 110067, India
| | - Kanchan Yadav
- Glycochemistry Laboratory, School of Physical Sciences, Jawaharlal Nehru University, New Delhi, 110067, India
| | - Ghanshyam Tiwari
- Department of Chemistry, Institute of Science, Banaras Hindu University, Varanasi, 221005, India
| | - Ram Sagar
- Glycochemistry Laboratory, School of Physical Sciences, Jawaharlal Nehru University, New Delhi, 110067, India; Department of Chemistry, Institute of Science, Banaras Hindu University, Varanasi, 221005, India.
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2
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Carney N, Perry N, Garabedian J, Nagorny P. Development of α-Selective Glycosylation with l-Oleandral and Its Application to the Total Synthesis of Oleandrin. Org Lett 2023; 25:966-971. [PMID: 36739571 DOI: 10.1021/acs.orglett.2c04358] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
This letter describes the development of an α-selective glycosylation using l-oleandrose, a 2-deoxysugar that is frequently found in natural products, and its application to the total synthesis of the natural cardiotonic steroids oleandrin and beaumontoside. To improve the reaction diastereoselectivity and to minimize side-product formation, an extensive evaluation and optimization of the conditions leading to α-selective glycosylation of digitoxigenin with l-oleandrose-based donors was conducted. These studies led to the exploration of 8 different phosphine·acid complexes or salts and yielded HBr·PPh3 as the optimal catalyst, which provided in the cleanest α-glycosylation and produced protected beaumontoside in 67% yield. Subsequent application of these conditions to synthetic oleandrigenin afforded the desired α-product in 69% isolated yield─enabling the completion of the first synthesis of oleandrin in 17 steps (1.2% yield) from testosterone.
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Affiliation(s)
- Nolan Carney
- Program in Chemical Biology, University of Michigan, Ann Arbor, Michigan 48109, United States
| | - Natasha Perry
- Department of Chemistry, University of Michigan, Ann Arbor, Michigan 48109, United States
| | - Jacob Garabedian
- Department of Chemistry, University of Michigan, Ann Arbor, Michigan 48109, United States
| | - Pavel Nagorny
- Department of Chemistry, University of Michigan, Ann Arbor, Michigan 48109, United States
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3
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Jiang N, Dong Y, Sun G, Yang G, Wang Q, Zhang J. Core‐Shell Fe
3
O
4
@Carbon@SO
3
H: A Powerful Recyclable Catalyst for the Synthesis of α‐2‐Deoxygalactosides. ChemistrySelect 2020. [DOI: 10.1002/slct.202000089] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Affiliation(s)
- Nan Jiang
- School of Chemistry and Molecular EngineeringEast China Normal University Shanghai 200241 P. R. of China
| | - Youxian Dong
- School of Chemistry and Molecular EngineeringEast China Normal University Shanghai 200241 P. R. of China
| | - Guosheng Sun
- School of Chemistry and Molecular EngineeringEast China Normal University Shanghai 200241 P. R. of China
| | - Guofang Yang
- School of Chemistry and Molecular EngineeringEast China Normal University Shanghai 200241 P. R. of China
| | - Qingbing Wang
- School of Chemistry and Molecular EngineeringEast China Normal University Shanghai 200241 P. R. of China
| | - Jianbo Zhang
- School of Chemistry and Molecular EngineeringEast China Normal University Shanghai 200241 P. R. of China
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4
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Direct Addition of Amides to Glycals Enabled by Solvation‐Insusceptible 2‐Haloazolium Salt Catalysis. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201907129] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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5
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Nakatsuji Y, Kobayashi Y, Takemoto Y. Direct Addition of Amides to Glycals Enabled by Solvation-Insusceptible 2-Haloazolium Salt Catalysis. Angew Chem Int Ed Engl 2019; 58:14115-14119. [PMID: 31392793 DOI: 10.1002/anie.201907129] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2019] [Revised: 07/24/2019] [Indexed: 01/12/2023]
Abstract
The direct 2-deoxyglycosylation of nucleophiles with glycals leads to biologically and pharmacologically important 2-deoxysugar compounds. Although the direct addition of hydroxyl and sulfonamide groups have been well developed, the direct 2-deoxyglycosylation of amide groups has not been reported to date. Herein, we show the first direct 2-deoxyglycosylation of amide groups using a newly designed Brønsted acid catalyst under mild conditions. Through mechanistic investigations, we discovered that the amide group can inhibit acid catalysts, and the inhibition has made the 2-deoxyglycosylation reaction difficult. Diffusion-ordered two-dimensional NMR spectroscopy analysis implied that the 2-chloroazolium salt catalyst was less likely to form aggregates with amides in comparison to other acid catalysts. The chlorine atom and the extended π-scaffold of the catalyst played a crucial role for this phenomenon. This relative insusceptibility to inhibition by amides is more responsible for the catalytic activity than the strength of the acidity.
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Affiliation(s)
- Yuya Nakatsuji
- Graduate School of Pharmaceutical Sciences, Kyoto University, 46-29 Shimoadachi-cho, Yoshida, Sakyo-ku, Kyoto, 606-8501, Japan
| | - Yusuke Kobayashi
- Graduate School of Pharmaceutical Sciences, Kyoto University, 46-29 Shimoadachi-cho, Yoshida, Sakyo-ku, Kyoto, 606-8501, Japan
| | - Yoshiji Takemoto
- Graduate School of Pharmaceutical Sciences, Kyoto University, 46-29 Shimoadachi-cho, Yoshida, Sakyo-ku, Kyoto, 606-8501, Japan
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6
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Manhas S, Taylor MS. Dehydrative glycosidations of 2-deoxysugar derivatives catalyzed by an arylboronic ester. Carbohydr Res 2018; 470:42-49. [DOI: 10.1016/j.carres.2018.10.002] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2018] [Revised: 10/11/2018] [Accepted: 10/11/2018] [Indexed: 01/05/2023]
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7
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Abstract
Deoxy-sugars often play a critical role in modulating the potency of many bioactive natural products. Accordingly, there has been sustained interest in methods for their synthesis over the past several decades. The focus of much of this work has been on developing new glycosylation reactions that permit the mild and selective construction of deoxyglycosides. This Review covers classical approaches to deoxyglycoside synthesis, as well as more recently developed chemistry that aims to control the selectivity of the reaction through rational design of the promoter. Where relevant, the application of this chemistry to natural product synthesis will also be described.
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Affiliation(s)
- Clay S. Bennett
- Department
of Chemistry, Tufts University, 62 Talbot Avenue, Medford, Massachusetts 02155, United States
| | - M. Carmen Galan
- School
of Chemistry, University of Bristol, Cantock’s Close, Bristol BS8 1TS, United Kingdom
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8
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Bandi R, Chalapala S, Chandrasekaran S. 2-Deoxyglycosyl 3-benzoylpropionates as novel donors for the direct and stereoselective synthesis of 2-deoxy-glycosides. Org Biomol Chem 2018. [DOI: 10.1039/c8ob00216a] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Lewis acid mediated stereoselective synthesis of 2-deoxy-O-glycosides has been demonstrated using 2-deoxyglycosyl 3-benzoylpropionates as novel glycosyl donors.
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Affiliation(s)
- Ramakrishna Bandi
- Department of Organic Chemistry
- Indian Institute of Science
- Bangalore 560 012
- India
| | - Sudharani Chalapala
- Department of Organic Chemistry
- Indian Institute of Science
- Bangalore 560 012
- India
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Affiliation(s)
- Ryan Williams
- School of Chemistry; University of Bristol; Cantock's Close BS8 1TS Bristol U.K
| | - M. Carmen Galan
- School of Chemistry; University of Bristol; Cantock's Close BS8 1TS Bristol U.K
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10
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Rasool F, Bhat AH, Hussain N, Mukherjee D. Reaction of Glycals with Organic Peroxides: Synthesis of 2-iodo, 2-Deoxy and 2,3-Unsaturated Glycosides. ChemistrySelect 2016. [DOI: 10.1002/slct.201601849] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Affiliation(s)
- Faheem Rasool
- Natural Product Chemistry- Miocrobes; Indian Institute of Integrative Medicine (CSIR); Jammu- 180001
- Academy of Scientific and Innovative Research; New Delhi India
| | - Aabid H. Bhat
- Natural Product Chemistry- Miocrobes; Indian Institute of Integrative Medicine (CSIR); Jammu- 180001
| | - Nazar Hussain
- Natural Product Chemistry- Miocrobes; Indian Institute of Integrative Medicine (CSIR); Jammu- 180001
- Academy of Scientific and Innovative Research; New Delhi India
| | - Debaraj Mukherjee
- Natural Product Chemistry- Miocrobes; Indian Institute of Integrative Medicine (CSIR); Jammu- 180001
- Academy of Scientific and Innovative Research; New Delhi India
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11
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Hsu MY, Liu YP, Lam S, Lin SC, Wang CC. TMSBr-mediated solvent- and work-up-free synthesis of α-2-deoxyglycosides from glycals. Beilstein J Org Chem 2016; 12:1758-64. [PMID: 27559420 PMCID: PMC4979735 DOI: 10.3762/bjoc.12.164] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2016] [Accepted: 07/09/2016] [Indexed: 12/11/2022] Open
Abstract
The thio-additions of glycals were efficiently promoted by a stoichiometric amount of trimethylsilyl bromide (TMSBr) to produce S-2-deoxyglycosides under solvent-free conditions in good to excellent yields. In addition, with triphenylphosphine oxide as an additive, the TMSBr-mediated direct glycosylations of glycals with a large range of alcohols were highly α-selective.
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Affiliation(s)
- Mei-Yuan Hsu
- Institute of Chemistry, Academia Sinica, Taipei 115, Taiwan; Chemical Biology and Molecular Biophysics Program, Taiwan International Graduate Program, Academia Sinica, Taipei 115, Taiwan; Department of Chemistry, National Taiwan University, Taipei 106, Taiwan
| | - Yi-Pei Liu
- Institute of Chemistry, Academia Sinica, Taipei 115, Taiwan; Department of Chemistry, National Central University, Jhongli 320, Taiwan
| | - Sarah Lam
- Institute of Chemistry, Academia Sinica, Taipei 115, Taiwan
| | - Su-Ching Lin
- Institute of Chemistry, Academia Sinica, Taipei 115, Taiwan
| | - Cheng-Chung Wang
- Institute of Chemistry, Academia Sinica, Taipei 115, Taiwan; Chemical Biology and Molecular Biophysics Program, Taiwan International Graduate Program, Academia Sinica, Taipei 115, Taiwan
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12
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Battina SK, Kashyap S. Copper mediated iodoacetoxylation and glycosylation: effective and convenient approaches for the stereoselective synthesis of 2-deoxy-2-iodo glycosides. Tetrahedron Lett 2016. [DOI: 10.1016/j.tetlet.2016.01.035] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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13
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Thombal RS, Jadhav VH. Facile O-glycosylation of glycals using Glu-Fe3O4-SO3H, a magnetic solid acid catalyst. RSC Adv 2016. [DOI: 10.1039/c6ra03305a] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A new glucose derived magnetic solid acid catalyst (Glu-Fe3O4-SO3H) was synthesized in a convenient and ecofriendly manner and well characterized using FTIR, PXRD, EDAX, SEM, and XPS which showed the presence of Fe3O4 embedded on the surface of the catalyst along with –SO3H, –OH and –COOH functional groups.
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Affiliation(s)
- Raju S. Thombal
- Department of Organic Chemistry
- National Chemical Laboratory (CSIR-NCL)
- Pune-411008
- India
| | - Vrushali H. Jadhav
- Department of Organic Chemistry
- National Chemical Laboratory (CSIR-NCL)
- Pune-411008
- India
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