1
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Khanam A, Dubey S, Mandal PK. Mild method for the synthesis of α-glycosyl chlorides: A convenient protocol for quick one-pot glycosylation. Carbohydr Res 2023; 534:108976. [PMID: 37871478 DOI: 10.1016/j.carres.2023.108976] [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: 09/16/2023] [Revised: 10/17/2023] [Accepted: 10/18/2023] [Indexed: 10/25/2023]
Abstract
A simple and efficient protocol for the preparation of α-glycosyl chlorides within 15-30 min is described which employs a stable, cheap, and commercially available Trichloroisocyanuric acid (TCCA) as non-toxic chlorinating agent along with PPh3. This process involved a wide range of substrate scope and is well-suited with labile hydroxyl protecting groups such as benzyl, acetyl, benzoyl, isopropylidene, benzylidene, and TBDPS (tert-butyldiphenylsilyl) groups. This process is operationally simple, mild conditions and obtained good yields with excellent α selectivity. Moreover, a multi-catalyst one-pot glycosylation can be carried out to transform the glycosyl hemiacetals directly to a various O-glycosides in high overall yields without the need for separation or purification of the α-glycosyl chloride donors.
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Affiliation(s)
- Ariza Khanam
- Medicinal and Process Chemistry Division, CSIR-Central Drug Research Institute, BS-10/1, Sector 10, Jankipuram Extension, Sitapur Road, P.O. Box 173, Lucknow, 226 031, India
| | - Shashiprabha Dubey
- Medicinal and Process Chemistry Division, CSIR-Central Drug Research Institute, BS-10/1, Sector 10, Jankipuram Extension, Sitapur Road, P.O. Box 173, Lucknow, 226 031, India
| | - Pintu Kumar Mandal
- Medicinal and Process Chemistry Division, CSIR-Central Drug Research Institute, BS-10/1, Sector 10, Jankipuram Extension, Sitapur Road, P.O. Box 173, Lucknow, 226 031, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India.
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2
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Singh Y, Geringer SA, Demchenko AV. Synthesis and Glycosidation of Anomeric Halides: Evolution from Early Studies to Modern Methods of the 21st Century. Chem Rev 2022; 122:11701-11758. [PMID: 35675037 PMCID: PMC9417321 DOI: 10.1021/acs.chemrev.2c00029] [Citation(s) in RCA: 21] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Advances in synthetic carbohydrate chemistry have dramatically improved access to common glycans. However, many novel methods still fail to adequately address challenges associated with chemical glycosylation and glycan synthesis. Since a challenge of glycosylation has remained, scientists have been frequently returning to the traditional glycosyl donors. This review is dedicated to glycosyl halides that have played crucial roles in shaping the field of glycosciences and continue to pave the way toward our understanding of chemical glycosylation.
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Affiliation(s)
- Yashapal Singh
- Department of Chemistry and Biochemistry, University of Missouri-St. Louis, One University Boulevard, St. Louis, Missouri 63121, United States
| | - Scott A Geringer
- Department of Chemistry and Biochemistry, University of Missouri-St. Louis, One University Boulevard, St. Louis, Missouri 63121, United States
| | - Alexei V Demchenko
- Department of Chemistry and Biochemistry, University of Missouri-St. Louis, One University Boulevard, St. Louis, Missouri 63121, United States
- Department of Chemistry, Saint Louis University, 3501 Laclede Avenue, St. Louis, Missouri 63103, United States
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3
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Zhang M, Li T, Peng P. Recent development in additive modulated stereoselective glycosidation reactions. J Carbohydr Chem 2022. [DOI: 10.1080/07328303.2022.2027432] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
- Miaomiao Zhang
- National Glycoengineering Research Center, Shandong Provincial Key Laboratory of Carbohydrate Chemistry and Glycobiology, Shandong University, Qingdao, China
| | - Tianlu Li
- National Glycoengineering Research Center, Shandong Provincial Key Laboratory of Carbohydrate Chemistry and Glycobiology, Shandong University, Qingdao, China
| | - Peng Peng
- National Glycoengineering Research Center, Shandong Provincial Key Laboratory of Carbohydrate Chemistry and Glycobiology, Shandong University, Qingdao, China
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4
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Javed, Tiwari A, Azeem Z, Mandal PK. 4,5-Dioxo-imidazolinium Cation-Promoted α-Selective Dehydrative Glycosylation of 2-Deoxy- and 2,6-Dideoxy Sugars. J Org Chem 2022; 87:3718-3729. [DOI: 10.1021/acs.joc.1c02650] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Javed
- Medicinal and Process Chemistry Division, CSIR-Central Drug Research Institute, BS-10/1, Sector 10, Jankipuram Extension, Sitapur Road, P.O. Box 173, Lucknow, 226031, India
| | - Ashwani Tiwari
- Medicinal and Process Chemistry Division, CSIR-Central Drug Research Institute, BS-10/1, Sector 10, Jankipuram Extension, Sitapur Road, P.O. Box 173, Lucknow, 226031, India
| | - Zanjila Azeem
- Medicinal and Process Chemistry Division, CSIR-Central Drug Research Institute, BS-10/1, Sector 10, Jankipuram Extension, Sitapur Road, P.O. Box 173, Lucknow, 226031, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Pintu Kumar Mandal
- Medicinal and Process Chemistry Division, CSIR-Central Drug Research Institute, BS-10/1, Sector 10, Jankipuram Extension, Sitapur Road, P.O. Box 173, Lucknow, 226031, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
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5
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Ranga PK, Ahmad F, Singh G, Tyagi A, Vijaya Anand R. Recent advances in the organocatalytic applications of cyclopropene- and cyclopropenium-based small molecules. Org Biomol Chem 2021; 19:9541-9564. [PMID: 34704583 DOI: 10.1039/d1ob01549d] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
The development of novel small molecule-based catalysts for organic transformations has increased noticeably in the last two decades. A very recent addition to this particular research area is cyclopropene- and cyclopropenium-based catalysts. At one point in time, particularly in the mid-20th century, much attention was focused on the structural aspects and physical properties of cyclopropene-based compounds. However, a paradigm shift was observed in the late 20th century, and the focus shifted to the synthetic utility of these compounds. In fact, a wide range of cyclopropene derivatives have been found serving as valuable synthons for the construction of carbocycles, heterocycles and other useful organic compounds. In the last few years, the catalytic applications of cyclopropene/cyclopropenium-based compounds have been uncovered and many synthetic protocols have been developed using cyclopropene-based compounds as organocatalysts. Therefore, the main objective of this review is to highlight recent developments in the catalytic applications of cyclopropene-based small molecules in different areas of organocatalysis such as phase-transfer catalysis (PTC), Brønsted base catalysis, hydrogen-bond donor catalysis, nucleophilic carbene catalysis, and electrophotocatalysis developed within the past two decades.
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Affiliation(s)
- Pavit K Ranga
- Department of Chemical Sciences, Indian Institute of Science Education and Research (IISER) Mohali, Sector 81, Knowledge City, S.A.S Nagar, Manauli (PO), Punjab - 140306, India.
| | - Feroz Ahmad
- Department of Chemical Sciences, Indian Institute of Science Education and Research (IISER) Mohali, Sector 81, Knowledge City, S.A.S Nagar, Manauli (PO), Punjab - 140306, India.
| | - Gurdeep Singh
- Department of Chemical Sciences, Indian Institute of Science Education and Research (IISER) Mohali, Sector 81, Knowledge City, S.A.S Nagar, Manauli (PO), Punjab - 140306, India.
| | - Akshi Tyagi
- Department of Chemical Sciences, Indian Institute of Science Education and Research (IISER) Mohali, Sector 81, Knowledge City, S.A.S Nagar, Manauli (PO), Punjab - 140306, India.
| | - Ramasamy Vijaya Anand
- Department of Chemical Sciences, Indian Institute of Science Education and Research (IISER) Mohali, Sector 81, Knowledge City, S.A.S Nagar, Manauli (PO), Punjab - 140306, India.
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6
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Bennett CS. Glycosyl Sulfonates Beyond Triflates. CHEM REC 2021; 21:3102-3111. [PMID: 34142755 PMCID: PMC10923190 DOI: 10.1002/tcr.202100141] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2021] [Revised: 06/03/2021] [Indexed: 11/10/2022]
Abstract
While glycosyl triflates are frequently invoked as intermediates in many chemical glycosylation reactions, the chemistry of other glycosyl sulfonates remains comparatively underexplored. Given the reactivity of sulfonates can span several orders of magnitude, this represents an untapped resource for the development of stereoselective glycosylation reactions. This personal account describes our laboratories efforts to take advantage of this reactivity to develop β-specific glycosylation reactions. Initial investigations led to the development of 2-deoxy-sugar tosylates as highly selective donors for β-glycoside synthesis, an approach which has been used to great success by our group and others for the construction of deoxy-sugar oligosaccharides and natural products. Subsequent studies demonstrate that "matching" the reactivity of the sulfonate to that of the sugar donor leads to highly selective SN 2-glycosylations with a range of substrates.
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Affiliation(s)
- Clay S Bennett
- Department of Chemistry, Tufts University, 62 Talbot Ave., 02155, Medford, MA, USA
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7
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Traboni S, Vessella G, Bedini E, Iadonisi A. Solvent-free, under air selective synthesis of α-glycosides adopting glycosyl chlorides as donors. Org Biomol Chem 2021; 18:5157-5163. [PMID: 32583825 DOI: 10.1039/d0ob01024c] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
α-Glycosides are highly relevant synthetic targets due to their abundance in natural oligosaccharides involved in many biological processes. Nevertheless their preparation is hampered by several issues, due to both the strictly anhydrous conditions typically required in glycosylation procedures and the non-trivial achievement of high α-stereoselectivity, one of the major challenges in oligosaccharide synthesis. In this paper we report a novel and efficient approach for the highly stereoselective synthesis of α-glycosides. This is based on the unprecedented solvent-free combination of triethylphosphite, tetrabutylammonium bromide and N,N-diisopropylethylamine for the activation of glycosyl chlorides under air. Despite the relative stability of glycosyl chlorides with respect to more reactive halide donors, the solvent-free procedure allowed a wide set of α-glycosides, including biorelevant fragments, to be obtained in much shorter times compared with similar glycosylation approaches in solution. The presented method features a wide target scope and functional group compatibility, also serving with partially disarmed substrates, and it does not require a high stoichiometric excess of reagents nor the preparation of expensive precursors. The solvent-free glycosylation can be even directly performed from 1-hydroxy sugars without purification of the in situ generated chloride, providing an especially useful opportunity in the case of highly reactive and labile glycosyl donors.
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Affiliation(s)
- Serena Traboni
- Department of Chemical Sciences, University of Naples Federico II, Via Cinthia 4, I-80126 Naples, Italy.
| | - Giulia Vessella
- Department of Chemical Sciences, University of Naples Federico II, Via Cinthia 4, I-80126 Naples, Italy.
| | - Emiliano Bedini
- Department of Chemical Sciences, University of Naples Federico II, Via Cinthia 4, I-80126 Naples, Italy.
| | - Alfonso Iadonisi
- Department of Chemical Sciences, University of Naples Federico II, Via Cinthia 4, I-80126 Naples, Italy.
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8
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Meng S, Li X, Zhu J. Recent advances in direct synthesis of 2-deoxy glycosides and thioglycosides. Tetrahedron 2021. [DOI: 10.1016/j.tet.2021.132140] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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9
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Chen K, Xie T, Shen Y, He H, Zhao X, Gao S. Calixanthomycin A: Asymmetric Total Synthesis and Structural Determination. Org Lett 2021; 23:1769-1774. [DOI: 10.1021/acs.orglett.1c00193] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Affiliation(s)
- Kuanwei Chen
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes, School of Chemistry and Molecular Engineering, East China Normal University, 3663 North Zhongshan Road, Shanghai 200062, China
| | - Tao Xie
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes, School of Chemistry and Molecular Engineering, East China Normal University, 3663 North Zhongshan Road, Shanghai 200062, China
| | - Yanfang Shen
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes, School of Chemistry and Molecular Engineering, East China Normal University, 3663 North Zhongshan Road, Shanghai 200062, China
| | - Haibing He
- Shanghai Engineering Research Center of Molecular Therapeutics and New Drug Development, East China Normal University, 3663 North Zhongshan Road, Shanghai 200062, China
| | - Xiaoli Zhao
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes, School of Chemistry and Molecular Engineering, East China Normal University, 3663 North Zhongshan Road, Shanghai 200062, China
| | - Shuanhu Gao
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes, School of Chemistry and Molecular Engineering, East China Normal University, 3663 North Zhongshan Road, Shanghai 200062, China
- Shanghai Engineering Research Center of Molecular Therapeutics and New Drug Development, East China Normal University, 3663 North Zhongshan Road, Shanghai 200062, China
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10
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Ghosh T, Mukherji A, Kancharla PK. Influence of Anion-Binding Schreiner's Thiourea on DMAP Salts: Synergistic Catalysis toward the Stereoselective Dehydrative Glycosylation from 2-Deoxyhemiacetals. J Org Chem 2021; 86:1253-1261. [PMID: 33352053 DOI: 10.1021/acs.joc.0c02473] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
Amines are used as additives to facilitate or increase the host-guest chemistry between the thiourea and the anions of Bronsted acids. However, we here demonstrate, for the first time, the synergistic effect of the combination of DMAP/HCl/Schreiner's thiourea in catalyzing dehydrative glycosylation. The variations in the electronic effects of the cationic Bronsted acid part (the protonated DMAP) in the presence of chloride binding Schreiner's thiourea have been discussed using NMR and X-ray crystallographic techniques.
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Affiliation(s)
- Titli Ghosh
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati 781039, Assam, India
| | - Ananya Mukherji
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati 781039, Assam, India
| | - Pavan K Kancharla
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati 781039, Assam, India
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11
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Romeo JR, McDermott L, Bennett CS. Reagent-Controlled α-Selective Dehydrative Glycosylation of 2,6-Dideoxy Sugars: Construction of the Arugomycin Tetrasaccharide. Org Lett 2020; 22:3649-3654. [PMID: 32281384 PMCID: PMC7239334 DOI: 10.1021/acs.orglett.0c01153] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
The first synthesis of the tetrasaccharide fragment of the anthracycline natural product Arugomycin is described. A reagent controlled dehydrative glycosylation method involving cyclopropenium activation was utilized to synthesize the α-linkages with complete anomeric selectivity. The synthesis was completed in 20 total steps, and in 2.5% overall yield with a longest linear sequence of 15 steps.
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Affiliation(s)
- Joseph R Romeo
- Department of Chemistry, Tufts University, Medford, Massachusetts 02155, United States
| | - Luca McDermott
- Department of Chemistry, Tufts University, Medford, Massachusetts 02155, United States
| | - Clay S Bennett
- Department of Chemistry, Tufts University, Medford, Massachusetts 02155, United States
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12
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Xie T, Zheng C, Chen K, He H, Gao S. Asymmetric Total Synthesis of the Complex Polycyclic Xanthone FD‐594. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.201915787] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Tao Xie
- Shanghai Key Laboratory of Green Chemistry and Chemical, ProcessesSchool of Chemistry and Molecular EngineeringEast China Normal University 3663 North Zhongshan Road Shanghai 200062 China
| | - Chaoying Zheng
- Shanghai Key Laboratory of Green Chemistry and Chemical, ProcessesSchool of Chemistry and Molecular EngineeringEast China Normal University 3663 North Zhongshan Road Shanghai 200062 China
| | - Kuanwei Chen
- Shanghai Key Laboratory of Green Chemistry and Chemical, ProcessesSchool of Chemistry and Molecular EngineeringEast China Normal University 3663 North Zhongshan Road Shanghai 200062 China
| | - Haibing He
- Shanghai Engineering Research Center of Molecular Therapeutics and New Drug DevelopmentEast China Normal University 3663 North Zhongshan Road Shanghai 200062 China
| | - Shuanhu Gao
- Shanghai Key Laboratory of Green Chemistry and Chemical, ProcessesSchool of Chemistry and Molecular EngineeringEast China Normal University 3663 North Zhongshan Road Shanghai 200062 China
- Shanghai Engineering Research Center of Molecular Therapeutics and New Drug DevelopmentEast China Normal University 3663 North Zhongshan Road Shanghai 200062 China
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13
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Xie T, Zheng C, Chen K, He H, Gao S. Asymmetric Total Synthesis of the Complex Polycyclic Xanthone FD‐594. Angew Chem Int Ed Engl 2020; 59:4360-4364. [DOI: 10.1002/anie.201915787] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2019] [Revised: 01/12/2020] [Indexed: 01/01/2023]
Affiliation(s)
- Tao Xie
- Shanghai Key Laboratory of Green Chemistry and Chemical, ProcessesSchool of Chemistry and Molecular EngineeringEast China Normal University 3663 North Zhongshan Road Shanghai 200062 China
| | - Chaoying Zheng
- Shanghai Key Laboratory of Green Chemistry and Chemical, ProcessesSchool of Chemistry and Molecular EngineeringEast China Normal University 3663 North Zhongshan Road Shanghai 200062 China
| | - Kuanwei Chen
- Shanghai Key Laboratory of Green Chemistry and Chemical, ProcessesSchool of Chemistry and Molecular EngineeringEast China Normal University 3663 North Zhongshan Road Shanghai 200062 China
| | - Haibing He
- Shanghai Engineering Research Center of Molecular Therapeutics and New Drug DevelopmentEast China Normal University 3663 North Zhongshan Road Shanghai 200062 China
| | - Shuanhu Gao
- Shanghai Key Laboratory of Green Chemistry and Chemical, ProcessesSchool of Chemistry and Molecular EngineeringEast China Normal University 3663 North Zhongshan Road Shanghai 200062 China
- Shanghai Engineering Research Center of Molecular Therapeutics and New Drug DevelopmentEast China Normal University 3663 North Zhongshan Road Shanghai 200062 China
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14
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Ghosh T, Mukherji A, Kancharla PK. Open-Close Strategy toward the Organocatalytic Generation of 2-Deoxyribosyl Oxocarbenium Ions: Pyrrolidine-Salt-Catalyzed Synthesis of 2-Deoxyribofuranosides. European J Org Chem 2019. [DOI: 10.1002/ejoc.201901465] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Titli Ghosh
- Department of Chemistry; Indian Institute of Technology; 781039 Guwahati India
| | - Ananya Mukherji
- Department of Chemistry; Indian Institute of Technology; 781039 Guwahati India
| | - Pavan K. Kancharla
- Department of Chemistry; Indian Institute of Technology; 781039 Guwahati India
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15
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Cai L, Zeng J, Li T, Xiao Y, Ma X, Xiao X, Zhang Q, Meng L, Wan Q. Dehydrative Glycosylation Enabled by a Comproportionation Reaction of 2‐Aryl‐1,3‐dithiane 1‐Oxide
†. CHINESE J CHEM 2019. [DOI: 10.1002/cjoc.201900419] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Lei Cai
- Hubei Key Laboratory of Natural Medicinal Chemistry and Resource Evaluation, School of PharmacyHuazhong University of Science and Technology, 13 Hangkong Road Wuhan Hubei 430030 China
| | - Jing Zeng
- Hubei Key Laboratory of Natural Medicinal Chemistry and Resource Evaluation, School of PharmacyHuazhong University of Science and Technology, 13 Hangkong Road Wuhan Hubei 430030 China
| | - Ting Li
- Hubei Key Laboratory of Natural Medicinal Chemistry and Resource Evaluation, School of PharmacyHuazhong University of Science and Technology, 13 Hangkong Road Wuhan Hubei 430030 China
| | - Ying Xiao
- Hubei Key Laboratory of Natural Medicinal Chemistry and Resource Evaluation, School of PharmacyHuazhong University of Science and Technology, 13 Hangkong Road Wuhan Hubei 430030 China
| | - Xiang Ma
- Hubei Key Laboratory of Natural Medicinal Chemistry and Resource Evaluation, School of PharmacyHuazhong University of Science and Technology, 13 Hangkong Road Wuhan Hubei 430030 China
| | - Xiong Xiao
- Hubei Key Laboratory of Natural Medicinal Chemistry and Resource Evaluation, School of PharmacyHuazhong University of Science and Technology, 13 Hangkong Road Wuhan Hubei 430030 China
| | - Qin Zhang
- Hubei Key Laboratory of Natural Medicinal Chemistry and Resource Evaluation, School of PharmacyHuazhong University of Science and Technology, 13 Hangkong Road Wuhan Hubei 430030 China
| | - Lingkui Meng
- Hubei Key Laboratory of Natural Medicinal Chemistry and Resource Evaluation, School of PharmacyHuazhong University of Science and Technology, 13 Hangkong Road Wuhan Hubei 430030 China
| | - Qian Wan
- Hubei Key Laboratory of Natural Medicinal Chemistry and Resource Evaluation, School of PharmacyHuazhong University of Science and Technology, 13 Hangkong Road Wuhan Hubei 430030 China
- Institute of Brain Research, Huazhong University of Science and Technology, 13 Hangkong Road Wuhan Hubei 430030 China
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16
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Meng S, Bhetuwal BR, Acharya PP, Zhu J. Facile Synthesis of Sugar Lactols via Bromine-Mediated Oxidation of Thioglycosides. J Carbohydr Chem 2019; 38:109-126. [PMID: 31396001 DOI: 10.1080/07328303.2019.1581889] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
Synthesis of a variety of sugar lactols (hemiacetals) has been accomplished in moderate to excellent yields by using bromine-mediated oxidation of thioglycosides. It was found that acetonitrile is the optimal solvent for this oxidation reaction. This approach involving bromine as oxidant is superior to that using N-bromosuccimide (NBS) which produces byproduct succinimide often difficult to separate from the lactol products.
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Affiliation(s)
- Shuai Meng
- Department of Chemistry and Biochemistry and School of Green Chemistry and Engineering, The University of Toledo, 2801 W. Bancroft Street, Toledo, Ohio 43606, United States
| | - Bishwa Raj Bhetuwal
- Department of Chemistry and Biochemistry and School of Green Chemistry and Engineering, The University of Toledo, 2801 W. Bancroft Street, Toledo, Ohio 43606, United States
| | - Padam P Acharya
- Department of Chemistry and Biochemistry and School of Green Chemistry and Engineering, The University of Toledo, 2801 W. Bancroft Street, Toledo, Ohio 43606, United States
| | - Jianglong Zhu
- Department of Chemistry and Biochemistry and School of Green Chemistry and Engineering, The University of Toledo, 2801 W. Bancroft Street, Toledo, Ohio 43606, United States
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17
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Mizia JC, Bennett CS. Reagent Controlled Direct Dehydrative Glycosylation with 2-Deoxy Sugars: Construction of the Saquayamycin Z Pentasaccharide. Org Lett 2019; 21:5922-5927. [PMID: 31305082 DOI: 10.1021/acs.orglett.9b02056] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The first synthesis of the pentasaccharide fragment of the angucycline antibiotic saquayamycin Z is described. By using our sulfonyl chloride mediated reagent controlled dehydrative glycosylation, we are able to assemble the glycosidic linkages with high levels of anomeric selectivity. The total synthesis was completed in 25 total steps, and in 2.5% overall yield with a longest linear sequence of 15 steps.
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Affiliation(s)
- J Colin Mizia
- Department of Chemistry , Tufts University , Medford , Massachusetts 02155 , United States
| | - Clay S Bennett
- Department of Chemistry , Tufts University , Medford , Massachusetts 02155 , United States
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18
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Abstract
Because of their pivotal biological functions, attention to sugars and glycobiology has grown rapidly in recent decades, leading to increased demand for homogeneous oligosaccharides. The stereoselective preparation of oligosaccharides by chemical means remains challenging and continues to be a vivid research area for organic chemists. In the past decade, new approaches and reinvestigated traditional methods have transformed the field. These developments include novel catalyses, various types of glycosylation modulators and the use of photochemical energy to facilitate glycosylation. This Minireview presents a brief overview of the latest trends in chemical glycosylation, with emphasis on the stereoselective synthetic protocols developed in the past decade.
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Affiliation(s)
- Jesse Ling
- Department of Chemistry, Tufts University, 62 Talbot Ave., Medford, MA 02155, USA
| | - Clay S Bennett
- Department of Chemistry, Tufts University, 62 Talbot Ave., Medford, MA 02155, USA
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19
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Yalamanchili S, Lloyd D, Bennett CS. Synthesis of the Hexasaccharide Fragment of Landomycin A Using a Mild, Reagent-Controlled Approach. Org Lett 2019; 21:3674-3677. [PMID: 31021647 DOI: 10.1021/acs.orglett.9b01118] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The synthesis of the hexasaccharide fragment of landomycin A is reported. Using p-toluenesulfonyl chloride mediated dehydrative glycosylation, we constructed the deoxy-sugar linkages in a stereoselective fashion without the need for temporary prosthetic groups to control selectivity. Through this approach, the hexasaccharide was obtained in 28 steps and 8.9% overall yield, which is an order of magnitude higher than that of previously reported approaches.
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Affiliation(s)
- Subbarao Yalamanchili
- Department of Chemistry , Tufts University , 62 Talbot Avenue , Medford , Massachusetts 02155 , United States
| | - Dina Lloyd
- Department of Chemistry , Tufts University , 62 Talbot Avenue , Medford , Massachusetts 02155 , United States
| | - Clay S Bennett
- Department of Chemistry , Tufts University , 62 Talbot Avenue , Medford , Massachusetts 02155 , United States
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20
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Ghosh T, Mukherji A, Srivastava HK, Kancharla PK. Secondary amine salt catalyzed controlled activation of 2-deoxy sugar lactols towards alpha-selective dehydrative glycosylation. Org Biomol Chem 2019; 16:2870-2875. [PMID: 29633773 DOI: 10.1039/c8ob00423d] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
A new organocatalytic glycosylation method exploiting the lactol functionality has been disclosed. The catalytic generation of glycosyl oxacarbenium ions from lactols under forcible conditions via weakly Brønsted-acidic, readily available secondary amine salts affects the diastereoselective glycosylation of 2-deoxypyranoses and furanoses. This operationally simple iminium catalyzed activation of 2-deoxy hemi-acetals is a potential alternative to the existing cumbersome methods that need specialized handling. The mechanisms for this unique transformation and kinetic/thermodynamic effects have been discussed based on both experimental evidence and theoretical studies.
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Affiliation(s)
- Titli Ghosh
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati, Assam 781039, India.
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21
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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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22
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Jana M, Bennett CS. Synthesis of the Non-Reducing Hexasaccharide Fragment of Saccharomicin B. Org Lett 2018; 20:7598-7602. [PMID: 30427691 DOI: 10.1021/acs.orglett.8b03333] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A synthesis of the nonreducing end hexasaccharide of saccharomicin B, α-l-Eva-(1→4)-α-l-Eva-(1→4)-α-l-Dig-(1→4)-α-l-Eva-(1→4)-α-l-Dig-(1→4)-β-d-Fuc, has been developed. Selective glycosylations of l-digitoxose (l-Dig) using AgPF6/TTBP-mediated thioether activation and l-4-e pi-vancosamine (l-Eva) using Tf2O/DTBMP-mediated sulfoxide activation produced the hexasaccharide as a single diastereomer in very good yield. This hexasaccharide is properly functionalized to serve as a glycosyl donor for the total synthesis of saccharomicin B.
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Affiliation(s)
- Manas Jana
- Department of Chemistry , Tufts University , 62 Talbot Avenue , Medford , Massachusetts 02155 , United States
| | - Clay S Bennett
- Department of Chemistry , Tufts University , 62 Talbot Avenue , Medford , Massachusetts 02155 , United States
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23
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O'Neill S, Rodriguez J, Walczak MA. Direct Dehydrative Glycosylation of C1-Alcohols. Chem Asian J 2018; 13:2978-2990. [PMID: 30019854 PMCID: PMC7326538 DOI: 10.1002/asia.201800971] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2018] [Indexed: 12/15/2022]
Abstract
Due to the central role played by carbohydrates in a multitude of biological processes, there has been a sustained interest in developing effective glycosylation methods to enable more thorough investigation of their essential functions. Among the myriad technologies available for stereoselective glycoside bond formation, dehydrative glycosylation possesses a distinct advantage given the unique properties of C1-alcohols such as straightforward preparation, stability, and a general reactivity compatible with a diverse set of reaction conditions. In this Focus Review, a survey of direct dehydrative glycosylations of C1-alcohols is provided with an emphasis on recent achievements, pervading limitations, mechanistic insights, and applications in total synthesis.
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Affiliation(s)
- Sloane O'Neill
- Department of Chemistry and Biochemistry, University of Colorado, Boulder, CO, 80309, USA
| | - Jacob Rodriguez
- Department of Chemistry and Biochemistry, University of Colorado, Boulder, CO, 80309, USA
| | - Maciej A Walczak
- Department of Chemistry and Biochemistry, University of Colorado, Boulder, CO, 80309, USA
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24
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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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25
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Soliman SE, Bennett CS. Reagent-Controlled Synthesis of the Branched Trisaccharide Fragment of the Antibiotic Saccharomicin B. Org Lett 2018; 20:3413-3417. [PMID: 29790762 DOI: 10.1021/acs.orglett.8b01355] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A concise synthesis of a branched trisaccharide, α-l-Dig-(1 → 3)-[α-l-Eva-(1 → 4)]-β-d-Fuc, corresponding to saccharomicin B, has been developed via reagent-controlled α-selective glycosylations. Starting from the d-fucose acceptor, l- epi-vancosamine was selectively installed using 2,3-bis(2,3,4-trimethoxyphenyl)cyclopropene-1-thione/oxalyl bromide mediated dehydrative glycosylation. Following deprotection, l-digitoxose was installed using the AgPF6/TTBP thioether-activation method to produce the trisaccharide as a single α-anomer. This highly functionalized trisaccharide can potentially serve as both a donor and an acceptor for the total synthesis of the antibiotic saccharomicin B.
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Affiliation(s)
- Sameh E Soliman
- Department of Chemistry , Tufts University , 62 Talbot Avenue , Medford , Massachusetts 02155 , United States
| | - Clay S Bennett
- Department of Chemistry , Tufts University , 62 Talbot Avenue , Medford , Massachusetts 02155 , United States
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26
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Lloyd D, Bennett CS. An Improved Approach to the Direct Construction of 2-Deoxy-β-Linked Sugars: Applications to Oligosaccharide Synthesis. Chemistry 2018; 24:7610-7614. [PMID: 29572995 DOI: 10.1002/chem.201800736] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2018] [Revised: 03/19/2018] [Indexed: 02/05/2023]
Abstract
A next-generation reagent-controlled approach for the synthesis of 2,6-dideoxy and 2,3,6-trideoxy sugar donors in good yield and high β-selectivity is reported. The use of p-toluenesulfonyl chloride and potassium hexamethyldisilazide (KHMDS) greatly simplifies deoxy-sugar glycoside construction, and can be used for gram-scale glycosylation reactions. The development of this approach and its application to the construction of β-linked deoxy-sugar oligosaccharides are described.
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Affiliation(s)
- Dina Lloyd
- Department Department of Chemistry, Tufts University, 62 Talbot Ave., Medford, MA, 02155, USA
| | - Clay S Bennett
- Department Department of Chemistry, Tufts University, 62 Talbot Ave., Medford, MA, 02155, USA
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27
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Dyapa R, Dockery LT, Walczak MA. Dehydrative glycosylation with cyclic phosphonium anhydrides. Org Biomol Chem 2018; 15:51-55. [PMID: 27722396 DOI: 10.1039/c6ob01812b] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Cyclic phosphonium anhydrides generated from bis-phosphine oxides and trifluoromethanesulfonic anhydride are shown as general coupling reagents in a dehydrative glycosylation reaction of C1-hemiacetals. This reaction protocol is characterized by a broad substrate scope and high yields, including reactions of O-, C-, N-, and S-based nucleophiles with furanose, pyranose, and deoxysugar donors.
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Affiliation(s)
- Rajendar Dyapa
- Department of Chemistry and Biochemistry, University of Colorado, Boulder, CO 80309, USA.
| | - Lance T Dockery
- Department of Chemistry and Biochemistry, University of Colorado, Boulder, CO 80309, USA.
| | - Maciej A Walczak
- Department of Chemistry and Biochemistry, University of Colorado, Boulder, CO 80309, USA.
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28
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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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29
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Neralkar M, Mishra B, Hotha S. Nucleofuge Generating Glycosidations by the Remote Activation of Hydroxybenzotriazolyl Glycosides. J Org Chem 2017; 82:11494-11504. [DOI: 10.1021/acs.joc.7b02027] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Affiliation(s)
- Mahesh Neralkar
- Department of Chemistry, Indian Institute of Science Education and Research, Pune, 411 008 MH, India
| | - Bijoyananda Mishra
- Department of Chemistry, Indian Institute of Science Education and Research, Pune, 411 008 MH, India
| | - Srinivas Hotha
- Department of Chemistry, Indian Institute of Science Education and Research, Pune, 411 008 MH, India
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30
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Zeng J, Xu Y, Wang H, Meng L, Wan Q. Recent progress on the synthesis of 2-deoxy glycosides. Sci China Chem 2017. [DOI: 10.1007/s11426-016-9010-9] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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31
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Lyons DJM, Crocker RD, Blümel M, Nguyen TV. Promotion of Organic Reactions by Non‐Benzenoid Carbocyclic Aromatic Ions. Angew Chem Int Ed Engl 2016; 56:1466-1484. [DOI: 10.1002/anie.201605979] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2016] [Indexed: 12/12/2022]
Affiliation(s)
| | - Reece D. Crocker
- School of Chemistry University of New South Wales Sydney Australia
| | - Marcus Blümel
- School of Chemistry University of New South Wales Sydney Australia
- Institute of Organic Chemistry RWTH Aachen University Landoltweg 1 52074 Aachen Germany
| | - Thanh V. Nguyen
- School of Chemistry University of New South Wales Sydney Australia
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32
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Lyons DJM, Crocker RD, Blümel M, Nguyen TV. Vermittlung organischer Reaktionen durch nichtbenzoide carbocyclische aromatische Ionen. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201605979] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
| | - Reece D. Crocker
- School of Chemistry University of New South Wales Sydney Australien
| | - Marcus Blümel
- School of Chemistry University of New South Wales Sydney Australien
- Institut für Organische Chemie RWTH Aachen Landoltweg 1 52074 Aachen Deutschland
| | - Thanh V. Nguyen
- School of Chemistry University of New South Wales Sydney Australien
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33
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Rai A, Singh PK, Shukla P, Rai VK. Carbocation catalyzed carboxylic acid activation in Staudinger reaction for stereoselective synthesis of β-lactams. Tetrahedron Lett 2016. [DOI: 10.1016/j.tetlet.2016.10.012] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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34
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Qiu S, Zhang W, Sun G, Wang Z, Zhang J. A Facile and Direct Glycosidation Method for the Synthesis of 2-Deoxy α-Rhamnosides Catalyzed by Ferric Chloride. ChemistrySelect 2016. [DOI: 10.1002/slct.201600802] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Saifeng Qiu
- School of Chemistry and Molecular Engineering; East China Normal University; Shanghai 200241 P.R. China
| | - Wan Zhang
- School of Chemistry and Molecular Engineering; East China Normal University; Shanghai 200241 P.R. China
| | - Guosheng Sun
- School of Chemistry and Molecular Engineering; East China Normal University; Shanghai 200241 P.R. China
| | - Zhongfu Wang
- School of Life Sciences; Northwestern University; Xi'an, Shaanxi 710069 P.R. China
| | - Jianbo Zhang
- School of Chemistry and Molecular Engineering; East China Normal University; Shanghai 200241 P.R. China
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35
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Nogueira JM, Bylsma M, Bright DK, Bennett CS. Reagent‐Controlled α‐Selective Dehydrative Glycosylation of 2,6‐Dideoxy‐ and 2,3,6‐Trideoxy Sugars. Angew Chem Int Ed Engl 2016; 55:10088-92. [DOI: 10.1002/anie.201605091] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2016] [Indexed: 01/08/2023]
Affiliation(s)
- Jason M. Nogueira
- Department of Chemistry Tufts University 62 Talbot Ave. Medford MA 02155 USA
| | - Marissa Bylsma
- Department of Chemistry Tufts University 62 Talbot Ave. Medford MA 02155 USA
| | - Danielle K. Bright
- Department of Chemistry Tufts University 62 Talbot Ave. Medford MA 02155 USA
| | - Clay S. Bennett
- Department of Chemistry Tufts University 62 Talbot Ave. Medford MA 02155 USA
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36
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Nogueira JM, Bylsma M, Bright DK, Bennett CS. Reagent‐Controlled α‐Selective Dehydrative Glycosylation of 2,6‐Dideoxy‐ and 2,3,6‐Trideoxy Sugars. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201605091] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Jason M. Nogueira
- Department of Chemistry Tufts University 62 Talbot Ave. Medford MA 02155 USA
| | - Marissa Bylsma
- Department of Chemistry Tufts University 62 Talbot Ave. Medford MA 02155 USA
| | - Danielle K. Bright
- Department of Chemistry Tufts University 62 Talbot Ave. Medford MA 02155 USA
| | - Clay S. Bennett
- Department of Chemistry Tufts University 62 Talbot Ave. Medford MA 02155 USA
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37
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Nguyen TV, Lyons DJM. A novel aromatic carbocation-based coupling reagent for esterification and amidation reactions. Chem Commun (Camb) 2015; 51:3131-4. [DOI: 10.1039/c4cc09539a] [Citation(s) in RCA: 49] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Driven by aromatization: a novel tropylium-based coupling reagent has been developed to facilitate nucleophilic coupling reactions of carboxylic acids.
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38
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Wang H, Tao J, Cai X, Chen W, Zhao Y, Xu Y, Yao W, Zeng J, Wan Q. Stereoselective Synthesis of α-Linked 2-Deoxy Glycosides Enabled by Visible-Light-Mediated Reductive Deiodination. Chemistry 2014; 20:17319-23. [DOI: 10.1002/chem.201405516] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2014] [Indexed: 12/23/2022]
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39
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Balmond EI, Benito-Alifonso D, Coe DM, Alder RW, McGarrigle EM, Galan MC. A 3,4-trans-fused cyclic protecting group facilitates α-selective catalytic synthesis of 2-deoxyglycosides. Angew Chem Int Ed Engl 2014; 53:8190-4. [PMID: 24953049 PMCID: PMC4499252 DOI: 10.1002/anie.201403543] [Citation(s) in RCA: 89] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2014] [Indexed: 11/09/2022]
Abstract
A practical approach has been developed to convert glucals and rhamnals into disaccharides or glycoconjugates with high α-selectivity and yields (77-97%) using a trans-fused cyclic 3,4-O-disiloxane protecting group and TsOH⋅H2O (1 mol%) as a catalyst. Control of the anomeric selectivity arises from conformational locking of the intermediate oxacarbenium cation. Glucals outperform rhamnals because the C6 side-chain conformation augments the selectivity.
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Affiliation(s)
- Edward I Balmond
- School of Chemistry, University of Bristol, Cantock's CloseBristol BS8 1TS (UK)
| | | | - Diane M Coe
- GlaxoSmithKline Medicines Research CentreGunnels Wood Road, Stevenage SG1 2NY (UK)
| | - Roger W Alder
- School of Chemistry, University of Bristol, Cantock's CloseBristol BS8 1TS (UK)
| | - Eoghan M McGarrigle
- Centre for Synthesis and Chemical Biology, UCD School of Chemistry & Chemical Biology, University College DublinBelfield, Dublin 4 (Ireland)
| | - M Carmen Galan
- School of Chemistry, University of Bristol, Cantock's CloseBristol BS8 1TS (UK)
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40
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Liu D, Sarrafpour S, Guo W, Goulart B, Bennett CS. Matched/Mismatched Interactions in Chiral Brønsted Acid-Catalyzed Glycosylation Reactions with 2-Deoxy-Sugar Trichloroacetimidate Donors. J Carbohydr Chem 2014. [DOI: 10.1080/07328303.2014.927882] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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41
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Balmond EI, Benito-Alifonso D, Coe DM, Alder RW, McGarrigle EM, Galan MC. A 3,4-trans-Fused Cyclic Protecting Group Facilitates α-Selective Catalytic Synthesis of 2-Deoxyglycosides. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201403543] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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42
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Islam M, Tirukoti ND, Nandi S, Hotha S. Hypervalent Iodine Mediated Synthesis of C-2 Deoxy Glycosides and Amino Acid Glycoconjugates. J Org Chem 2014; 79:4470-6. [DOI: 10.1021/jo500465m] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Maidul Islam
- Department of Chemistry, Indian Institute of Science Education
and Research, Pune 411 008, India
| | - Nishanth D. Tirukoti
- Department of Chemistry, Indian Institute of Science Education
and Research, Pune 411 008, India
| | - Shyamapada Nandi
- Department of Chemistry, Indian Institute of Science Education
and Research, Pune 411 008, India
| | - Srinivas Hotha
- Department of Chemistry, Indian Institute of Science Education
and Research, Pune 411 008, India
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43
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Issa JP, Bennett CS. A Reagent-Controlled SN2-Glycosylation for the Direct Synthesis of β-Linked 2-Deoxy-Sugars. J Am Chem Soc 2014; 136:5740-4. [DOI: 10.1021/ja500410c] [Citation(s) in RCA: 121] [Impact Index Per Article: 12.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Affiliation(s)
- John Paul Issa
- Department of Chemistry, Tufts University, 62 Talbot Avenue, Medford, Massachusetts 02155, United States
| | - Clay S. Bennett
- Department of Chemistry, Tufts University, 62 Talbot Avenue, Medford, Massachusetts 02155, United States
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44
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Chen JH, Ruei JH, Mong KKT. Iterative α-Glycosylation Strategy for 2-Deoxy- and 2,6-Dideoxysugars: Application to the One-Pot Synthesis of Deoxysugar-Containing Oligosaccharides. European J Org Chem 2014. [DOI: 10.1002/ejoc.201400006] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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45
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Chen G, Yin Q, Yin J, Gu X, Liu X, You Q, Chen YL, Xiong B, Shen J. Strained olefin enables triflic anhydride mediated direct dehydrative glycosylation. Org Biomol Chem 2014; 12:9781-5. [DOI: 10.1039/c4ob01807a] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Tf2O mediated dehydrative glycosylation was enabled by strained olefins, including beta-(−)-pinene, and inhibited by other typical bases.
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Affiliation(s)
- Guohua Chen
- School of Pharmacy
- China Pharmaceutical University
- Nanjing 210009, P. R. China
| | - Qiang Yin
- School of Pharmacy
- China Pharmaceutical University
- Nanjing 210009, P. R. China
- Shanghai Institute of Materia Medica
- Chinese Academy of Sciences
| | - Jian Yin
- The Key Laboratory of Carbohydrate Chemistry and Biotechnology
- Ministry of Education
- School of Biotechnology
- Jiangnan University
- Wuxi 214122, P. R. China
| | - Xiangying Gu
- School of Pharmacy
- China Pharmaceutical University
- Nanjing 210009, P. R. China
- Shanghai Institute of Materia Medica
- Chinese Academy of Sciences
| | - Xiao Liu
- School of Pharmacy
- China Pharmaceutical University
- Nanjing 210009, P. R. China
- Shanghai Institute of Materia Medica
- Chinese Academy of Sciences
| | - Qidong You
- School of Pharmacy
- China Pharmaceutical University
- Nanjing 210009, P. R. China
| | - Yue-Lei Chen
- Shanghai Institute of Materia Medica
- Chinese Academy of Sciences
- Shanghai 201203, P. R. China
| | - Bing Xiong
- Shanghai Institute of Materia Medica
- Chinese Academy of Sciences
- Shanghai 201203, P. R. China
| | - Jingkang Shen
- Shanghai Institute of Materia Medica
- Chinese Academy of Sciences
- Shanghai 201203, P. R. China
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46
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Issa JP, Lloyd D, Steliotes E, Bennett CS. Reagent controlled β-specific dehydrative glycosylation reactions with 2-deoxy-sugars. Org Lett 2013; 15:4170-3. [PMID: 23906042 DOI: 10.1021/ol4018547] [Citation(s) in RCA: 69] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
N-Sulfonyl imidazoles activate 2-deoxy-sugar hemiacetals for glycosylation presumably by converting them into glycosyl sulfonates in situ. By matching the leaving group ability of the sulfonate with the reactivity of the donor, it is possible to obtain β-specific glycosylation reactions. The reaction serves as proof of the principle that, by choosing promoters that can modulate the reactivity of active intermediates, it is possible to place glycosylation reactions entirely under reagent control.
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Affiliation(s)
- John Paul Issa
- Department of Chemistry, Tufts University, Medford, Massachusetts 02155, USA
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47
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Chu AHA, Nguyen SH, Sisel JA, Minciunescu A, Bennett CS. Selective synthesis of 1,2-cis-α-glycosides without directing groups. Application to iterative oligosaccharide synthesis. Org Lett 2013; 15:2566-9. [PMID: 23646882 DOI: 10.1021/ol401095k] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
A method for the highly selective synthesis of 1,2-cis-α-linked glycosides that does not require the use of the specialized protecting group patterns normally employed to control diastereoselectivity is described. Thioglycoside acceptors can be used, permitting iterative oligosaccharide synthesis. The approach eliminates the need for lengthy syntheses of monosaccharides possessing highly specialized and unconventional protecting group patterns.
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Affiliation(s)
- An-Hsiang Adam Chu
- Department of Chemistry, Tufts University , 62 Talbot Avenue, Medford, Massachusetts 02145, United States
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48
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Rai A, Yadav LDS. Cyclopropenone-Catalyzed Direct Conversion of Aldoximes and Primary Amides into Nitriles. European J Org Chem 2013. [DOI: 10.1002/ejoc.201300059] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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49
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Adhikari S, Baryal KN, Zhu D, Li X, Zhu J. Gold-Catalyzed Synthesis of 2-Deoxy Glycosides Using S-But-3-ynyl Thioglycoside Donors. ACS Catal 2012. [DOI: 10.1021/cs300670k] [Citation(s) in RCA: 61] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Affiliation(s)
- Surya Adhikari
- Department of Chemistry and School
of Green Chemistry
and Engineering, The University of Toledo, 2801 West Bancroft Street, Toledo, Ohio 43606, United States
| | - Kedar N. Baryal
- Department of Chemistry and School
of Green Chemistry
and Engineering, The University of Toledo, 2801 West Bancroft Street, Toledo, Ohio 43606, United States
| | - Danyang Zhu
- Department of Chemistry and School
of Green Chemistry
and Engineering, The University of Toledo, 2801 West Bancroft Street, Toledo, Ohio 43606, United States
| | - Xiaohua Li
- Department of Chemistry and School
of Green Chemistry
and Engineering, The University of Toledo, 2801 West Bancroft Street, Toledo, Ohio 43606, United States
| | - Jianglong Zhu
- Department of Chemistry and School
of Green Chemistry
and Engineering, The University of Toledo, 2801 West Bancroft Street, Toledo, Ohio 43606, United States
| |
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Verma VP, Wang CC. Highly Stereoselective Glycosyl-Chloride-Mediated Synthesis of 2-Deoxyglucosides. Chemistry 2012; 19:846-51. [DOI: 10.1002/chem.201203418] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2012] [Revised: 10/20/2012] [Indexed: 11/11/2022]
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