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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Design, Synthesis, and Anticancer Activity of a Selenium-Containing Galectin-3 and Galectin-9N Inhibitor. Int J Mol Sci 2022; 23:ijms23052581. [PMID: 35269724 PMCID: PMC8910629 DOI: 10.3390/ijms23052581] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2022] [Revised: 02/21/2022] [Accepted: 02/22/2022] [Indexed: 12/24/2022] Open
Abstract
Galectins are soluble β-D-galactoside-binding proteins whose implication in cancer progression and disease outcome makes them prominent targets for therapeutic intervention. In this frame, the development of small inhibitors that block selectively the activity of galectins represents an important strategy for cancer therapy which is, however, still relatively underdeveloped. To this end, we designed here a rationally and efficiently novel diglycosylated compound, characterized by a selenoglycoside bond and the presence of a lipophilic benzyl group at both saccharide residues. The relatively high binding affinity of the new compound to the carbohydrate recognition domain of two galectins, galectin 3 and galectin 9, its good antiproliferative and anti-migration activity towards melanoma cells, as well as its anti-angiogenesis properties, pave the way for its further development as an anticancer agent.
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3
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Santana AG, Herrera AJ, González CC. Intramolecular Metal-Free C(sp 3)-H Activation Enables a Selective Mono O-Debenzylation of Fully Protected Aminosugars. J Org Chem 2021; 86:16736-16752. [PMID: 34807601 DOI: 10.1021/acs.joc.1c01977] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Carbamate-bearing benzylated aminosugars undergo an I2/I(III)-promoted intramolecular hydrogen atom transfer (IHAT) followed by a nucleophilic attack to provide polycyclic structures. Thus, suitably positioned benzyl ethers are surgically oxidized into the corresponding mixed N/O-benzylidene acetals, which can be conveniently deprotected under mild acidic conditions to grant access to selectively O-deprotected aminosugars amenable for further derivatization. The scope of this strategy has been proven with a series of furanosic and pyranosic scaffolds. Preliminary mechanistic studies, including Hammett LFER and KIE analyses, support a reaction pathway with nucleophilic cyclization as the rate-determining step.
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Affiliation(s)
- Andrés G Santana
- Instituto de Productos Naturales y Agrobiología del C.S.I.C., Avenida Astrofísico Francisco Sánchez 3, 38206 La Laguna, Tenerife, Spain
| | - Antonio J Herrera
- Instituto de Productos Naturales y Agrobiología del C.S.I.C., Avenida Astrofísico Francisco Sánchez 3, 38206 La Laguna, Tenerife, Spain
| | - Concepción C González
- Instituto de Productos Naturales y Agrobiología del C.S.I.C., Avenida Astrofísico Francisco Sánchez 3, 38206 La Laguna, Tenerife, Spain
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4
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Sridhar PR, Anjaneyulu B, Rao BU. Regioselective Anomeric
O
‐Benzyl Deprotection in Carbohydrates. European J Org Chem 2021. [DOI: 10.1002/ejoc.202101033] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Perali Ramu Sridhar
- School of Chemistry University of Hyderabad Hyderabad, Gachibowli 500046 India
| | - Bandi Anjaneyulu
- School of Chemistry University of Hyderabad Hyderabad, Gachibowli 500046 India
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5
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Goyard D, Kónya B, Czifrák K, Larini P, Demontrond F, Leroy J, Balzarin S, Tournier M, Tousch D, Petit P, Duret C, Maurel P, Docsa T, Gergely P, Somsák L, Praly JP, Azay-Milhau J, Vidal S. Glucose-based spiro-oxathiazoles as in vivo anti-hyperglycemic agents through glycogen phosphorylase inhibition. Org Biomol Chem 2020; 18:931-940. [PMID: 31922157 DOI: 10.1039/c9ob01190k] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
The design of glycogen phosphorylase (GP) inhibitors targeting the catalytic site of the enzyme is a promising strategy for a better control of hyperglycaemia in the context of type 2 diabetes. Glucopyranosylidene-spiro-heterocycles have been demonstrated as potent GP inhibitors, and more specifically spiro-oxathiazoles. A new synthetic route has now been elaborated through 1,3-dipolar cycloaddition of an aryl nitrile oxide to a glucono-thionolactone affording in one step the spiro-oxathiazole moiety. The thionolactone was obtained from the thermal rearrangement of a thiosulfinate precursor according to Fairbanks' protocols, although with a revisited outcome and also rationalised with DFT calculations. The 2-naphthyl substituted glucose-based spiro-oxathiazole 5h, identified as one of the most potent GP inhibitors (Ki = 160 nM against RMGPb) could be produced on the gram-scale from this strategy. Further evaluation in vitro using rat and human hepatocytes demonstrated that compound 5h is a anti-hyperglycaemic drug candidates performing slightly better than DAB used as a positive control. Investigation in Zucker fa/fa rat model in acute and subchronic assays further confirmed the potency of compound 5h since it lowered blood glucose levels by ∼36% at 30 mg kg-1 and ∼43% at 60 mg kg-1. The present study is one of the few in vivo investigations for glucose-based GP inhibitors and provides data in animal models for such drug candidates.
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Affiliation(s)
- David Goyard
- Institut de Chimie et Biochimie Moléculaires et Supramoléculaires, UMR 5246, CNRS, Université Claude Bernard Lyon 1, Bâtiment Lederer, 1 Rue Victor Grignard, F-69622 Villeurbanne, France.
| | - Bálint Kónya
- Department of Organic Chemistry, University of Debrecen, POB 400, H-4002 Debrecen, Hungary
| | - Katalin Czifrák
- Department of Organic Chemistry, University of Debrecen, POB 400, H-4002 Debrecen, Hungary
| | - Paolo Larini
- Institut de Chimie et Biochimie Moléculaires et Supramoléculaires, UMR 5246, CNRS, Université Claude Bernard Lyon 1, Bâtiment Lederer, 1 Rue Victor Grignard, F-69622 Villeurbanne, France.
| | - Fanny Demontrond
- Institut de Chimie et Biochimie Moléculaires et Supramoléculaires, UMR 5246, CNRS, Université Claude Bernard Lyon 1, Bâtiment Lederer, 1 Rue Victor Grignard, F-69622 Villeurbanne, France.
| | - Jérémy Leroy
- Montpellier University, EA7288, Biocommunication in cardiometabolism (BC2M), Montpellier, France
| | - Sophie Balzarin
- Montpellier University, EA7288, Biocommunication in cardiometabolism (BC2M), Montpellier, France
| | - Michel Tournier
- Montpellier University, EA7288, Biocommunication in cardiometabolism (BC2M), Montpellier, France
| | - Didier Tousch
- Montpellier University, EA7288, Biocommunication in cardiometabolism (BC2M), Montpellier, France
| | - Pierre Petit
- Montpellier University, EA7288, Biocommunication in cardiometabolism (BC2M), Montpellier, France
| | - Cédric Duret
- INSERM U1040, Montpellier, France and Montpellier University, UMR-1040, Montpellier, France
| | - Patrick Maurel
- INSERM U1040, Montpellier, France and Montpellier University, UMR-1040, Montpellier, France
| | - Tibor Docsa
- Institute of Medical Chemistry, University of Debrecen, POB 7, Nagyerdei krt. 98, H-4012 Debrecen, Hungary
| | - Pál Gergely
- Institute of Medical Chemistry, University of Debrecen, POB 7, Nagyerdei krt. 98, H-4012 Debrecen, Hungary
| | - László Somsák
- Department of Organic Chemistry, University of Debrecen, POB 400, H-4002 Debrecen, Hungary
| | - Jean-Pierre Praly
- Institut de Chimie et Biochimie Moléculaires et Supramoléculaires, UMR 5246, CNRS, Université Claude Bernard Lyon 1, Bâtiment Lederer, 1 Rue Victor Grignard, F-69622 Villeurbanne, France.
| | - Jacqueline Azay-Milhau
- Montpellier University, EA7288, Biocommunication in cardiometabolism (BC2M), Montpellier, France
| | - Sébastien Vidal
- Institut de Chimie et Biochimie Moléculaires et Supramoléculaires, UMR 5246, CNRS, Université Claude Bernard Lyon 1, Bâtiment Lederer, 1 Rue Victor Grignard, F-69622 Villeurbanne, France.
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6
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Verkhnyatskaya SA, de Vries AH, Douma‐de Vries E, Sneep RJL, Walvoort MTC. Direct and Regioselective Di-α-fucosylation on the Secondary Rim of β-Cyclodextrin. Chemistry 2019; 25:6722-6727. [PMID: 30801812 PMCID: PMC6563713 DOI: 10.1002/chem.201806090] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2018] [Revised: 02/15/2019] [Indexed: 01/01/2023]
Abstract
A straightforward glycosylation method is described to regio- and stereoselectively introduce two α-l-fucose moieties directly to the secondary rim of β-cyclodextrin. Using NMR and MS fragmentation studies, the nonasaccharide structure was determined, which was also visualized using molecular dynamics simulations. The reported glycosylation method proved to be robust on gram-scale, and may be generally applied to directly glycosylate β-cyclodextrins to make well-defined multivalent glycoclusters.
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Affiliation(s)
- Stella A. Verkhnyatskaya
- Stratingh Institute for ChemistryUniversity of GroningenNijenborgh 79747 AGGroningenThe Netherlands
| | - Alex H. de Vries
- Groningen Biomolecular Sciences and Biotechnology InstituteUniversity of GroningenNijenborgh 79747 AGGroningenThe Netherlands
| | - Elmatine Douma‐de Vries
- Stratingh Institute for ChemistryUniversity of GroningenNijenborgh 79747 AGGroningenThe Netherlands
| | - Renze J. L. Sneep
- Stratingh Institute for ChemistryUniversity of GroningenNijenborgh 79747 AGGroningenThe Netherlands
| | - Marthe T. C. Walvoort
- Stratingh Institute for ChemistryUniversity of GroningenNijenborgh 79747 AGGroningenThe Netherlands
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7
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Wang T, Demchenko AV. Synthesis of carbohydrate building blocks via regioselective uniform protection/deprotection strategies. Org Biomol Chem 2019; 17:4934-4950. [PMID: 31044205 DOI: 10.1039/c9ob00573k] [Citation(s) in RCA: 37] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Discussed herein is the synthesis of partially protected carbohydrates by manipulating only one type of a protecting group for a given substrate. The first focus of this review is the uniform protection of an unprotected starting material in a way that only one (or two) hydroxyl group remains unprotected. The second focus involves regioselective partial deprotection of uniformly protected compounds in a way that only one (or two) hydroxyl group becomes liberated.
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Affiliation(s)
- Tinghua Wang
- Department of Chemistry and Biochemistry, University of Missouri - St Louis, One University Boulevard, St Louis, Missouri 63121, USA.
| | - Alexei V Demchenko
- Department of Chemistry and Biochemistry, University of Missouri - St Louis, One University Boulevard, St Louis, Missouri 63121, USA.
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8
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Kulkarni SS, Wang CC, Sabbavarapu NM, Podilapu AR, Liao PH, Hung SC. "One-Pot" Protection, Glycosylation, and Protection-Glycosylation Strategies of Carbohydrates. Chem Rev 2018; 118:8025-8104. [PMID: 29870239 DOI: 10.1021/acs.chemrev.8b00036] [Citation(s) in RCA: 202] [Impact Index Per Article: 33.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Carbohydrates, which are ubiquitously distributed throughout the three domains of life, play significant roles in a variety of vital biological processes. Access to unique and homogeneous carbohydrate materials is important to understand their physical properties, biological functions, and disease-related features. It is difficult to isolate carbohydrates in acceptable purity and amounts from natural sources. Therefore, complex saccharides with well-defined structures are often most conviently accessed through chemical syntheses. Two major hurdles, regioselective protection and stereoselective glycosylation, are faced by carbohydrate chemists in synthesizing these highly complicated molecules. Over the past few years, there has been a radical change in tackling these problems and speeding up the synthesis of oligosaccharides. This is largely due to the development of one-pot protection, one-pot glycosylation, and one-pot protection-glycosylation protocols and streamlined approaches to orthogonally protected building blocks, including those from rare sugars, that can be used in glycan coupling. In addition, new automated strategies for oligosaccharide syntheses have been reported not only for program-controlled assembly on solid support but also by the stepwise glycosylation in solution phase. As a result, various sugar molecules with highly complex, large structures could be successfully synthesized. To summarize these recent advances, this review describes the methodologies for one-pot protection and their one-pot glycosylation into the complex glycans and the chronological developments associated with automated syntheses of oligosaccharides.
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Affiliation(s)
- Suvarn S Kulkarni
- Department of Chemistry , Indian Institute of Technology Bombay , Mumbai 400076 , India
| | | | | | - Ananda Rao Podilapu
- Department of Chemistry , Indian Institute of Technology Bombay , Mumbai 400076 , India
| | - Pin-Hsuan Liao
- Institute of Chemistry , Academia Sinica , Taipei 115 , Taiwan
| | - Shang-Cheng Hung
- Genomics Research Center , Academia Sinica , Taipei 115 , Taiwan
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9
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Tatina MB, Khong DT, Judeh ZMA. Efficient Synthesis of α-Glycosyl Chlorides Using 2-Chloro-1,3-dimethylimidazolinium Chloride: A Convenient Protocol for Quick One-Pot Glycosylation. European J Org Chem 2018. [DOI: 10.1002/ejoc.201800360] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Madhu Babu Tatina
- School of Chemical and Biomedical Engineering; Nanyang Technological University; 62 Nanyang Drive, N1.2-B1-14 637459 Singapore Singapore
| | - Duc Thinh Khong
- School of Chemical and Biomedical Engineering; Nanyang Technological University; 62 Nanyang Drive, N1.2-B1-14 637459 Singapore Singapore
| | - Zaher M. A. Judeh
- School of Chemical and Biomedical Engineering; Nanyang Technological University; 62 Nanyang Drive, N1.2-B1-14 637459 Singapore Singapore
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10
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11
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Traboni S, Liccardo F, Bedini E, Giordano M, Iadonisi A. Solvent-free synthesis of glycosyl chlorides based on the triphenyl phosphine/hexachloroacetone system. Tetrahedron Lett 2017. [DOI: 10.1016/j.tetlet.2017.03.068] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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12
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Sheerin K, Guazzelli L, Oscarson S. Large scale synthesis and regioselective protection schemes of ethyl 2-azido-2-deoxy-1-thio-α-d-cellobioside for preparation of heparin thiodisaccharide building blocks. Carbohydr Res 2017; 440-441:16-31. [PMID: 28167367 DOI: 10.1016/j.carres.2017.01.005] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2016] [Revised: 01/10/2017] [Accepted: 01/10/2017] [Indexed: 02/04/2023]
Abstract
Crystalline acetylated ethyl 2-azido-2-deoxy-1-thio-α-d-cellobioside has been prepared on a multigram scale from cellobiose in an overall yield of 23% with no chromatography required and converted after deacetylation into the 4',6'-O-benzylidene and 4',6'-O-benzylidene-6-O-TBDMS protected derivatives. Applying a number of regioselective benzylation methods on these gave access to a variety of regioselectively protected derivatives, both mono-ols (2'- and 3-OH), diols (2',6-, 2',3-, and 3,6-di-OH), and triols (2',3,6- and 2',3',3-tri-OH). A number of these derivatives were further processed by benzoylation followed by removal or opening of the benzylidene acetal and selective oxidation of the exposed primary alcohol to give heparin building block intermediates comprising a range of possible sulfation patterns.
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Affiliation(s)
- Kevin Sheerin
- School of Chemistry, University College Dublin, Belfield, Dublin 4, Ireland
| | - Lorenzo Guazzelli
- School of Chemistry, University College Dublin, Belfield, Dublin 4, Ireland
| | - Stefan Oscarson
- School of Chemistry, University College Dublin, Belfield, Dublin 4, Ireland.
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13
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14
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Lanz G, Madsen R. Glycosylation with Disarmed Glycosyl Bromides Promoted by Iodonium Ions. European J Org Chem 2016. [DOI: 10.1002/ejoc.201600545] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Gyrithe Lanz
- Department of Chemistry; Technical University of Denmark; 2800 Kgs. Lyngby Denmark
| | - Robert Madsen
- Department of Chemistry; Technical University of Denmark; 2800 Kgs. Lyngby Denmark
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15
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Tambie MS, Jalsa NK. A Novel Selectfluor-Mediated Regioselective O-Benzyl Ether Acetolysis of Perbenzylated Monosaccharides. J Carbohydr Chem 2015. [DOI: 10.1080/07328303.2015.1108423] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Affiliation(s)
- Marlon S. Tambie
- Department of Chemistry, The University of the West Indies, St. Augustine, Trinidad and Tobago
| | - Nigel Kevin Jalsa
- Department of Chemistry, The University of the West Indies, St. Augustine, Trinidad and Tobago
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16
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Caso MF, D’Alonzo D, D’Errico S, Palumbo G, Guaragna A. Highly Stereoselective Synthesis of Lamivudine (3TC) and Emtricitabine (FTC) by a Novel N-Glycosidation Procedure. Org Lett 2015; 17:2626-9. [DOI: 10.1021/acs.orglett.5b00982] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Affiliation(s)
- Maria Federica Caso
- Dipartimento
di Scienze Chimiche, Università degli Studi di Napoli Federico II, Via Cintia 21, 80126 Napoli, Italy
| | - Daniele D’Alonzo
- Dipartimento
di Scienze Chimiche, Università degli Studi di Napoli Federico II, Via Cintia 21, 80126 Napoli, Italy
| | - Stefano D’Errico
- Dipartimento
di Farmacia, Università degli Studi di Napoli Federico II, Via D. Montesano 49, 80131 Napoli, Italy
| | - Giovanni Palumbo
- Dipartimento
di Scienze Chimiche, Università degli Studi di Napoli Federico II, Via Cintia 21, 80126 Napoli, Italy
| | - Annalisa Guaragna
- Dipartimento
di Scienze Chimiche, Università degli Studi di Napoli Federico II, Via Cintia 21, 80126 Napoli, Italy
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17
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Zulueta MML, Janreddy D, Hung SC. One-Pot Methods for the Protection and Assembly of Sugars. Isr J Chem 2015. [DOI: 10.1002/ijch.201400171] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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18
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Ali SP, Jalsa NK. Order of Reactivity of OH/NH Groups of Glucosamine Hydrochloride and N-Acetyl Glucosamine Toward Benzylation Using NaH/BnBr in DMF. J Carbohydr Chem 2014. [DOI: 10.1080/07328303.2014.907907] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Affiliation(s)
- Stacy P. Ali
- Department of Chemistry, The University of the West Indies, St. Augustine, Trinidad and Tobago
| | - Nigel Kevin Jalsa
- Department of Chemistry, The University of the West Indies, St. Augustine, Trinidad and Tobago
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19
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Zhang XL, Yu P, Wu YW, Wu QP, Zhang QS. Reductive Amination of Acetals by Anilines in the Presence of Triethylsilane and Iodine. JOURNAL OF CHEMICAL RESEARCH 2014. [DOI: 10.3184/174751914x13946178288518] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
A mild and efficient method for N-alkylation of aromatic amines with various acetals such as aryl, alkyl, cyclic and acyclic acetals was developed. A number of aromatic amines bearing electron-donating or electron-withdrawing substituents were directly alkylated by acetals with excellent yields. The method uses a catalytic amount of I2 and triethylsilane as the hydride source without a metal present. Monoalkylation with excellent chemoselectivity was observed.
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Affiliation(s)
- Xue-Lin Zhang
- School of Chemical Engineering and Environment, Beijing Institute of Technology, Beijing 100081, P.R. China
| | - Pan Yu
- School of Chemical Engineering and Environment, Beijing Institute of Technology, Beijing 100081, P.R. China
| | - Yong-Wei Wu
- School of Chemical Engineering and Environment, Beijing Institute of Technology, Beijing 100081, P.R. China
| | - Qin-Pei Wu
- School of Chemical Engineering and Environment, Beijing Institute of Technology, Beijing 100081, P.R. China
| | - Qing-Shan Zhang
- School of Chemical Engineering and Environment, Beijing Institute of Technology, Beijing 100081, P.R. China
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20
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Hsu Y, Ma HH, Lico LS, Jan JT, Fukase K, Uchinashi Y, Zulueta MML, Hung SC. One-pot synthesis of N-acetyl- and N-glycolylneuraminic acid capped trisaccharides and evaluation of their influenza A(H1 N1) inhibition. Angew Chem Int Ed Engl 2014; 53:2413-6. [PMID: 24482157 DOI: 10.1002/anie.201309646] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2013] [Revised: 12/25/2013] [Indexed: 12/23/2022]
Abstract
Human lung epithelial cells natively offer terminal N-acetylneuraminic acid (Neu5Ac) α(2→6)-linked to galactose (Gal) as binding sites for influenza virus hemagglutinin. N-Glycolylneuraminic acid (Neu5Gc) in place of Neu5Ac is known to affect hemagglutinin binding in other species. Not normally generated by humans, Neu5Gc may find its way to human cells from dietary sources. To compare their influence in influenza virus infection, six trisaccharides with Neu5Ac or Neu5Gc α(2→6) linked to Gal and with different reducing end sugar units were prepared using one-pot assembly and divergent transformation. The sugar assembly made use of an N-phthaloyl-protected sialyl imidate for chemoselective activation and α-stereoselective coupling with a thiogalactoside. Assessment of cytopathic effect showed that the Neu5Gc-capped trisaccharides inhibited the viral infection better than their Neu5Ac counterparts.
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Affiliation(s)
- Yun Hsu
- Genomics Research Center, Academia Sinica, No. 128 Academia Road, Section 2, Taipei 115 (Taiwan); Department of Chemistry, National Tsing Hua University, No. 101, Section 2, Kuang-Fu Road, Hsinchu 300 (Taiwan)
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21
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Hsu Y, Ma HH, Lico LS, Jan JT, Fukase K, Uchinashi Y, Zulueta MML, Hung SC. One-Pot Synthesis ofN-Acetyl- andN-Glycolylneuraminic Acid Capped Trisaccharides and Evaluation of Their Influenza A(H1 N1) Inhibition. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201309646] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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22
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Giordano M, Iadonisi A. Tin-Mediated Regioselective Benzylation and Allylation of Polyols: Applicability of a Catalytic Approach Under Solvent-Free Conditions. J Org Chem 2013; 79:213-22. [DOI: 10.1021/jo402399n] [Citation(s) in RCA: 62] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Affiliation(s)
- Maddalena Giordano
- Department
of Chemical Sciences, University of Naples “Federico II”, Via Cintia 4, Naples 80126, Italy
| | - Alfonso Iadonisi
- Department
of Chemical Sciences, University of Naples “Federico II”, Via Cintia 4, Naples 80126, Italy
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Komarova BS, Orekhova MV, Tsvetkov YE, Nifantiev NE. Is an acyl group at O-3 in glucosyl donors able to control α-stereoselectivity of glycosylation? The role of conformational mobility and the protecting group at O-6. Carbohydr Res 2013; 384:70-86. [PMID: 24368161 DOI: 10.1016/j.carres.2013.11.016] [Citation(s) in RCA: 65] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2013] [Revised: 11/21/2013] [Accepted: 11/23/2013] [Indexed: 11/28/2022]
Abstract
The stereodirecting effect of a 3-O-acetyl protecting group, which is potentially capable of the remote anchimeric participation, and other protecting groups in 2-O-benzyl glucosyl donors with flexible and rigid conformations has been investigated. To this aim, an array of N-phenyltrifluoroacetimidoyl and sulfoxide donors bearing either 3-O-acetyl or 3-O-benzyl groups in combination with 4,6-di-O-benzyl, 6-O-acyl-4-O-benzyl, or 4,6-O-benzylidene protecting groups was prepared. The conformationally flexible 3-O-acetylated glucosyl donor protected at other positions with O-benzyl groups demonstrated very low or no α-stereoselectivity upon glycosylation of primary or secondary acceptors. On the contrary, 3,6-di-O-acylated glucosyl donors proved to be highly α-stereoselective as well as the donor having a single potentially participating acetyl group at O-6. The 3,6-di-O-acylated donor was shown to be the best α-glucosylating block for the primary acceptor, whereas the best α-selectivity of glycosylation of the secondary acceptor was achieved with the 6-O-acylated donor. Glycosylation of the secondary acceptor with the conformationally constrained 3-O-acetyl-4,6-O-benzylidene-protected donor displayed under standard conditions (-35°C) even lower α-selectivity as compared to the 3-O-benzyl analogue. However, increasing the reaction temperature essentially raised the α-stereoselectivities of glycosylation with both 3-O-acetyl and 3-O-benzyl donors and made them almost equal. The stereodirecting effects of protecting groups observed for N-phenyltrifluoroacetimidoyl donors were also generally proven for sulfoxide donors.
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Affiliation(s)
- Bozhena S Komarova
- Laboratory of Glycoconjugate Chemistry, N.D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Leninsky Prospect 47, 119991 Moscow, Russia
| | - Maria V Orekhova
- Laboratory of Glycoconjugate Chemistry, N.D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Leninsky Prospect 47, 119991 Moscow, Russia
| | - Yury E Tsvetkov
- Laboratory of Glycoconjugate Chemistry, N.D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Leninsky Prospect 47, 119991 Moscow, Russia
| | - Nikolay E Nifantiev
- Laboratory of Glycoconjugate Chemistry, N.D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Leninsky Prospect 47, 119991 Moscow, Russia.
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24
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Emmadi M, Kulkarni SS. Synthesis of orthogonally protected bacterial, rare-sugar and D-glycosamine building blocks. Nat Protoc 2013; 8:1870-89. [DOI: 10.1038/nprot.2013.113] [Citation(s) in RCA: 61] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
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25
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Chouhan M, Kumar K, Sharma R, Grover V, Nair VA. NiCl2·6H2O/NaBH4 in methanol: a mild and efficient strategy for chemoselective deallylation/debenzylation of aryl ethers. Tetrahedron Lett 2013. [DOI: 10.1016/j.tetlet.2013.06.072] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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26
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Attouche A, Urban D, Beau JM. A Tin-Free Regioselective Radical De-O-benzylation by an Intramolecular Hydrogen Atom Transfer on Carbohydrate Templates. Angew Chem Int Ed Engl 2013. [DOI: 10.1002/ange.201301783] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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27
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Attouche A, Urban D, Beau JM. A Tin-Free Regioselective Radical De-O-benzylation by an Intramolecular Hydrogen Atom Transfer on Carbohydrate Templates. Angew Chem Int Ed Engl 2013; 52:9572-5. [DOI: 10.1002/anie.201301783] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2013] [Revised: 04/30/2013] [Indexed: 11/08/2022]
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28
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Synthesis of raffinose family oligosaccharides by regioselective de-O-benzylation with Co2(CO)8/Et3SiH/CO system. Tetrahedron 2013. [DOI: 10.1016/j.tet.2013.03.094] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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29
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Giordano M, Iadonisi A, Pastore A. Regioselective Acetolysis of HighlyO-Benzylated Carbohydrates Promoted by Iodine or an Iodine/Silane Combined Reagent: Use of Isopropenyl Acetate as an Alternative to Acetic Anhydride. European J Org Chem 2013. [DOI: 10.1002/ejoc.201300064] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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30
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Giordano M, Iadonisi A. A practical approach to regioselective O-benzylation of primary positions of polyols. Tetrahedron Lett 2013. [DOI: 10.1016/j.tetlet.2013.01.023] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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31
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Balbuena P, Gonçalves-Pereira R, Jiménez Blanco JL, García-Moreno MI, Lesur D, Ortiz Mellet C, García Fernández JM. o-Xylylene protecting group in carbohydrate chemistry: application to the regioselective protection of a single vic-diol segment in cyclodextrins. J Org Chem 2013; 78:1390-403. [PMID: 23336396 DOI: 10.1021/jo302178f] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A systematic study of the suitability of α,α'-dibromo-o-xylene as a reagent for cyclic o-xylylene protection of vic-diols in different monosaccharide substrates is reported. The installation of this protecting group, formally equivalent to a di-O-benzylation reaction, proceeds with good regioselectivity toward 1,2-trans-diequatorial diol systems in pyranose and furanose rings. Initially, the benzyl ether-type derivative of the more acidic hydroxyl is preferentially formed. Subsequent intramolecular etherification toward the equatorial-oriented vicinal OH is kinetically favored. The methodology has been implemented for the simultaneous protection of the secondary O-2 and O-3 positions of a single d-glucopyranosyl unit in cyclic oligosaccharides of the cyclodextrin (CD) family (cyclomaltohexa-, -hepta-, and -octaose; α, β, and γCD).
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Affiliation(s)
- Patricia Balbuena
- Instituto de Investigaciones Químicas, CSIC-Universidad de Sevilla, c/Américo Vespucio 49, Isla de la Cartuja, E-41092 Sevilla, Spain
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32
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Giordano M, Iadonisi A. Polymethylhydrosiloxane (PMHS): A Convenient Option for Synthetic Applications of the Iodine/Silane Combined Reagent - Straightforward Entries to 2-Hydroxyglycals and Useful Building-Blocks of Glucuronic Acid and Glucosamine. European J Org Chem 2012. [DOI: 10.1002/ejoc.201201084] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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33
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Filice M, Guisan JM, Terreni M, Palomo JM. Regioselective monodeprotection of peracetylated carbohydrates. Nat Protoc 2012; 7:1783-96. [PMID: 22955694 DOI: 10.1038/nprot.2012.098] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
This protocol describes the regioselective deprotection of single hydroxyls in peracetylated monosaccharides and disaccharides by enzymatic or chemoenzymatic strategies. The introduction of a one-pot enzymatic step by using immobilized biocatalysts obviates the requirement to carry out tedious workups and time-consuming purifications. By using this straightforward protocol, different per-O-acetylated glycopyranosides (mono- or disaccharides, 1-substituted or glycals) can be transformed into a whole set of differentially monodeprotected 1-alcohols, 3-alcohols, 4-alcohols and 6-alcohols in high yields. These tailor-made glycosyl acceptors can then be used for stereoselective glycosylation for oligosaccharide and glycoderivative synthesis. They have been successfully used as building blocks to synthesize tailor-made di- and trisaccharides involved in the structure of lacto-N-neo-tetraose and precursors of the tumor-associated carbohydrate antigen T and the antitumoral drug peracetylated β-naphtyl-lactosamine. We are able to prepare a purified monoprotected carbohydrate in between 1 and 4 d. With this protocol, the small library of monodeprotected products can be synthesized in 1-2 weeks.
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Affiliation(s)
- Marco Filice
- Departamento de Biocatálisis, Instituto de Catálisis (CSIC), Madrid, Spain
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34
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Guitet M, Beaumais SAD, Blériot Y, Vauzeilles B, Zhang Y, Ménand M, Sollogoub M. Cyclodextrins selectively modified on both rims using an O-3-debenzylative post-functionalisation, a consequence of the Sorrento meeting. Carbohydr Res 2012; 356:278-81. [DOI: 10.1016/j.carres.2011.12.002] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2011] [Revised: 11/28/2011] [Accepted: 12/02/2011] [Indexed: 11/26/2022]
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35
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Jalsa NK. Regioselective removal of the anomeric O-benzyl from differentially protected carbohydrates. Tetrahedron Lett 2011. [DOI: 10.1016/j.tetlet.2011.09.130] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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36
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Wang B, Yin Z, Li Y, Yang TX, Meng XB, Li ZJ. Active Cobalt Catalyst for the Cleavage of Benzyl Ether. J Org Chem 2011; 76:9531-5. [DOI: 10.1021/jo2018284] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Bo Wang
- The State
Key Laboratory of Natural and Biomimetic
Drugs, School of Pharmaceutical Sciences, Peking University, Beijing 100191, P. R. China
| | - Zhaojun Yin
- The State
Key Laboratory of Natural and Biomimetic
Drugs, School of Pharmaceutical Sciences, Peking University, Beijing 100191, P. R. China
| | - Yangbing Li
- The State
Key Laboratory of Natural and Biomimetic
Drugs, School of Pharmaceutical Sciences, Peking University, Beijing 100191, P. R. China
| | - Ting-Xiang Yang
- The State
Key Laboratory of Natural and Biomimetic
Drugs, School of Pharmaceutical Sciences, Peking University, Beijing 100191, P. R. China
| | - Xiang-Bao Meng
- The State
Key Laboratory of Natural and Biomimetic
Drugs, School of Pharmaceutical Sciences, Peking University, Beijing 100191, P. R. China
| | - Zhong-Jun Li
- The State
Key Laboratory of Natural and Biomimetic
Drugs, School of Pharmaceutical Sciences, Peking University, Beijing 100191, P. R. China
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