1
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Jäck N, Hemming A, Hartmann L. Synthesis of Dual-Responsive Amphiphilic Glycomacromolecules: Controlled Release of Glycan Ligands via pH and UV Stimuli. Macromol Rapid Commun 2024:e2400439. [PMID: 39037337 DOI: 10.1002/marc.202400439] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2024] [Revised: 06/25/2024] [Indexed: 07/23/2024]
Abstract
This work presents a versatile strategy for the synthesis of dual stimuli-responsive amphiphilic glycomacromolecules with tailored release properties. Amphiphilic precision glycomacromolecules (APGs) derived from tailor-made building blocks using solid phase polymer synthesis form glycofunctionalized micelles, a versatile class of materials with applications in drug delivery, as antiinfection agents as well as simple cell mimetics. In this work, this concept is extended by integrating cleavable building blocks into APGs now allowing stimuli-responsive release of glycan ligands or destruction of the micelles. This study incorporates a newly designed acid-labile building block, 4-(4-(((((9H-fluoren-9-yl)methoxy)carbonyl)amino)methyl)-1,3-dioxolan-2-yl)benzoic acid (DBA), suitable also for other types of solid phase or amide chemistry, and an established UV-cleavable 2-nitrobenzyl linker (PL). The results demonstrate that both linkers can be cleaved independently and thus allow dual stimuli-responsive release from the APG micelles. By choosing the APG design e.g., placing the cleavable linkers between glycomacromolecular blocks presenting different types of carbohydrates, they can tune APG and micellar stability as well as the interaction and cluster formation with a carbohydrate-recognizing lectin. Such dual-responsive glycofunctionalized micelles have wide potential for use in drug delivery applications or for the development as anti-adhesion agents in antiviral and antibacterial treatments.
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Affiliation(s)
- Nicholas Jäck
- Institute of Macromolecular Chemistry, Albert-Ludwigs-Universität Freiburg, Stefan-Meier-Str. 31, 79104, Freiburg, Germany
- Institute of Organic Chemistry and Macromolecular Chemistry, Heinrich-Heine-Universität Düsseldorf, Universitätsstr. 1, 40225, Düsseldorf, Germany
- Cluster of Excellence livMatS @ FIT - Freiburg Center for Interactive Materials and Bioinspired Technologies, University of Freiburg, Georges-Köhler-Allee 105, D-79110, Freiburg, Germany
| | - Arne Hemming
- Institute of Organic Chemistry and Macromolecular Chemistry, Heinrich-Heine-Universität Düsseldorf, Universitätsstr. 1, 40225, Düsseldorf, Germany
| | - Laura Hartmann
- Institute of Macromolecular Chemistry, Albert-Ludwigs-Universität Freiburg, Stefan-Meier-Str. 31, 79104, Freiburg, Germany
- Cluster of Excellence livMatS @ FIT - Freiburg Center for Interactive Materials and Bioinspired Technologies, University of Freiburg, Georges-Köhler-Allee 105, D-79110, Freiburg, Germany
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2
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Herczeg M, Demeter F, Nagy T, Rusznyák Á, Hodek J, Sipos É, Lekli I, Fenyvesi F, Weber J, Kéki S, Borbás A. Block Synthesis and Step-Growth Polymerization of C-6-Sulfonatomethyl-Containing Sulfated Malto-Oligosaccharides and Their Biological Profiling. Int J Mol Sci 2024; 25:677. [PMID: 38203849 PMCID: PMC10779578 DOI: 10.3390/ijms25010677] [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: 12/06/2023] [Revised: 12/30/2023] [Accepted: 12/31/2023] [Indexed: 01/12/2024] Open
Abstract
Highly sulfated malto-oligomers, similar to heparin and heparan-sulfate, have good antiviral, antimetastatic, anti-inflammatory and cell growth inhibitory effects. Due to their broad biological activities and simple structure, sulfated malto-oligomer derivatives have a great therapeutic potential, therefore, the development of efficient synthesis methods for their production is of utmost importance. In this work, preparation of α-(1→4)-linked oligoglucosides containing a sulfonatomethyl moiety at position C-6 of each glucose unit was studied by different approaches. Malto-oligomeric sulfonic acid derivatives up to dodecasaccharides were prepared by polymerization using different protecting groups, and the composition of the product mixtures was analyzed by MALDI-MS methods and size-exclusion chromatography. Synthesis of lower oligomers was also accomplished by stepwise and block synthetic methods, and then the oligosaccharide products were persulfated. The antiviral, anti-inflammatory and cell growth inhibitory activity of the fully sulfated malto-oligosaccharide sulfonic acids were determined by in vitro tests. Four tested di- and trisaccharide sulfonic acids effectively inhibited the activation of the TNF-α-mediated inflammatory pathway without showing cytotoxicity.
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Affiliation(s)
- Mihály Herczeg
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, University of Debrecen, Egyetem tér 1, H-4032 Debrecen, Hungary;
| | - Fruzsina Demeter
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, University of Debrecen, Egyetem tér 1, H-4032 Debrecen, Hungary;
| | - Tibor Nagy
- Department of Applied Chemistry, Faculty of Science and Technology, Institute of Chemistry, University of Debrecen, Egyetem tér 1, H-4032 Debrecen, Hungary; (T.N.); (S.K.)
| | - Ágnes Rusznyák
- Department of Molecular and Nanopharmaceutics, Faculty of Pharmacy, University of Debrecen, Nagyerdei Körút 98, H-4032 Debrecen, Hungary; (Á.R.); (F.F.)
- Institute of Healthcare Industry, University of Debrecen, Egyetem tér 1, H-4032 Debrecen, Hungary
| | - Jan Hodek
- Institute of Organic Chemistry and Biochemistry, Czech Academy of Sciences, Flemingovo nam. 2, CZ-16000 Prague, Czech Republic; (J.H.); (J.W.)
| | - Éva Sipos
- Department of Pharmacodynamics, Faculty of Pharmacy, University of Debrecen, Nagyerdei Körút 98, H-4032 Debrecen, Hungary; (É.S.); (I.L.)
| | - István Lekli
- Department of Pharmacodynamics, Faculty of Pharmacy, University of Debrecen, Nagyerdei Körút 98, H-4032 Debrecen, Hungary; (É.S.); (I.L.)
| | - Ferenc Fenyvesi
- Department of Molecular and Nanopharmaceutics, Faculty of Pharmacy, University of Debrecen, Nagyerdei Körút 98, H-4032 Debrecen, Hungary; (Á.R.); (F.F.)
| | - Jan Weber
- Institute of Organic Chemistry and Biochemistry, Czech Academy of Sciences, Flemingovo nam. 2, CZ-16000 Prague, Czech Republic; (J.H.); (J.W.)
| | - Sándor Kéki
- Department of Applied Chemistry, Faculty of Science and Technology, Institute of Chemistry, University of Debrecen, Egyetem tér 1, H-4032 Debrecen, Hungary; (T.N.); (S.K.)
| | - Anikó Borbás
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, University of Debrecen, Egyetem tér 1, H-4032 Debrecen, Hungary;
- HUN-REN-UD Molecular Recognition and Interaction Research Group, University of Debrecen, Egyetem tér 1, H-4032 Debrecen, Hungary
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3
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Niman S, Buono R, Fruman DA, Vanderwal CD. Synthesis of a Complex Brasilicardin Analogue Utilizing a Cobalt-Catalyzed MHAT-Induced Radical Bicyclization Reaction. Org Lett 2023; 25:3451-3455. [PMID: 37141632 PMCID: PMC10204089 DOI: 10.1021/acs.orglett.3c01019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2023] [Indexed: 05/06/2023]
Abstract
We designed and executed an expedient synthesis of a complex analogue of the potent immunosuppressive natural product brasilicardin A. Our successful synthesis featured application of our recently developed MHAT-initiated radical bicyclization, which delivered the targeted, complex analogue in 17 steps in the longest linear sequence. Unfortunately, this analogue showed no observable immunosuppressive activity, which speaks to the importance of the structural and stereochemical elements of the natural core scaffold.
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Affiliation(s)
- Scott
W. Niman
- Department
of Chemistry, University of California, 1102 Natural Sciences II, Irvine, California 92697-2025, United States
| | - Roberta Buono
- Department
of Molecular Biology & Biochemistry, University of California, 3205 McGaugh Hall, Irvine, California 92697-2525, United States
| | - David A. Fruman
- Department
of Molecular Biology & Biochemistry, University of California, 3205 McGaugh Hall, Irvine, California 92697-2525, United States
| | - Christopher D. Vanderwal
- Department
of Chemistry, University of California, 1102 Natural Sciences II, Irvine, California 92697-2025, United States
- Department
of Pharmaceutical Sciences, University of
California, 101 Theory
#100, Irvine, California 92617, United States
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4
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Mohamad-Ramshan R, Ande C, Matsushita T, Haldimann K, Vasella A, Hobbie SN, Crich D. Synthesis of 4- O-(4-Amino-4-deoxy-β-D-xylopyranosyl)paromomycin and 4- S-(β-D-Xylopyranosyl)-4-deoxy-4'-thio-paromomycin and Evaluation of their Antiribosomal and Antibacterial Activity. Tetrahedron 2023; 135:133330. [PMID: 37035443 PMCID: PMC10081503 DOI: 10.1016/j.tet.2023.133330] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/24/2023]
Abstract
The design, synthesis and antiribosomal and antibacterial activity of two novel glycosides of the aminoglycoside antibiotic paromomycin are described. The first carries of 4-amino-4-deoxy-β-D-xylopyranosyl moiety at the paromomycin 4'-position and is approximately two-fold more active than the corresponding β-D-xylopyranosyl derivative. The second is a 4'-(β-D-xylopyranosylthio) derivative of 4'-deoxyparomomycin that is unexpectedly less active than the simple β-D-xylopyranosyl derivative, perhaps because of the insertion of the conformationally more mobile thioglycosidic linkage.
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Affiliation(s)
| | - Chennaiah Ande
- Department of Pharmaceutical and Biomedical Sciences, University of Georgia, 250 West Green Street, Athens, GA 30602, USA
| | - Takahiko Matsushita
- Department of Chemistry, Wayne State University, 5101 Cass Avenue, Detroit, MI 48202, USA
| | - Klara Haldimann
- Institute of Medical Microbiology, University of Zurich, Gloriastrasse 30, 8006 Zürich, Switzerland
| | - Andrea Vasella
- Organic Chemistry Laboratory, ETH Zürich, Vladimir-Prelog-Weg 1-5/10, 8093 Zürich, Switzerland
| | - Sven N Hobbie
- Institute of Medical Microbiology, University of Zurich, Gloriastrasse 30, 8006 Zürich, Switzerland
| | - David Crich
- Department of Chemistry, Wayne State University, 5101 Cass Avenue, Detroit, MI 48202, USA
- Department of Pharmaceutical and Biomedical Sciences, University of Georgia, 250 West Green Street, Athens, GA 30602, USA
- Department of Chemistry, University of Georgia, 302 East Campus Road, Athens, GA 30602, USA
- Complex Carbohydrate Research Center, University of Georgia, 315 Riverbend Road, Athens, GA 30602, USA
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5
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Alharthi FA, Potter GT, Jayson GC, Whitehead GFS, Vitórica-Yrezábal IJ, Gardiner JM. Unexpected Diastereomer Formation and Interconversions in Cyclohexane-1,2-diacetal Derivatization of a Glucuronic Acid Thioglycoside. Org Lett 2023; 25:2196-2200. [PMID: 36972327 PMCID: PMC10088025 DOI: 10.1021/acs.orglett.3c00255] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/29/2023]
Abstract
Reactions of a glucuronic acid (GlcA) β-thioglycoside with cyclohexadione show initial formation of the two anticipated all-trans decalin-type O2,O3 and O3,O4 cyclohexane-1,2-diacetals (CDAs) along with an epimer of the main O2,O3 acetal. This trans-cis isomer is then interconverted leading to higher amounts of the two all-trans products. Isomerization studies indicate slow interconversion between the all-trans CDA acetals, with only one undergoing significant interconversion with the minor 2,3-diastereomer. Crystal structures of all three isomers are included. These findings are relevant to other uses of CDA protections where occurrence of apparently disfavored isomers may be occurring, along with interconversions between CDA isomers.
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6
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Johnson LK, Niman SW, Vrubliauskas D, Vanderwal CD. Stereocontrolled Synthesis and Structural Revision of Plebeianiol A. Org Lett 2021; 23:9569-9573. [PMID: 34851132 PMCID: PMC8766249 DOI: 10.1021/acs.orglett.1c03791] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
We report the structural revision via synthesis of the abietane diterpenoid plebeianiol A. The synthesis was accomplished by a short and convergent sequence that featured our previously established cobalt-catalyzed hydrogen-atom-transfer-induced radical bicyclization. We further connected plebeianiol A as the likely biogenetic precursor to another previously reported ether-bridged abietane. Finally, we demonstrated that the key cyclization event is efficient with the A-ring diol protected as two different cyclic acetals or in unprotected form.
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Affiliation(s)
- Lucas K. Johnson
- Department of Chemistry, 1102 Natural Sciences II, University of California, Irvine, CA 92697-2025, USA
| | - Scott W. Niman
- Department of Chemistry, 1102 Natural Sciences II, University of California, Irvine, CA 92697-2025, USA
| | - Darius Vrubliauskas
- Department of Chemistry, 1102 Natural Sciences II, University of California, Irvine, CA 92697-2025, USA
| | - Christopher D. Vanderwal
- Department of Chemistry, 1102 Natural Sciences II, University of California, Irvine, CA 92697-2025, USA
- Department of Pharmaceutical Sciences, 101 Theory #100, University of California, Irvine, CA 92617, USA
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7
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Wheatley DE, Fontenelle CQ, Kuppala R, Szpera R, Briggs EL, Vendeville JB, Wells NJ, Light ME, Linclau B. Synthesis and Structural Characteristics of all Mono- and Difluorinated 4,6-Dideoxy-d- xylo-hexopyranoses. J Org Chem 2021; 86:7725-7756. [PMID: 34029099 DOI: 10.1021/acs.joc.1c00796] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Protein-carbohydrate interactions are implicated in many biochemical/biological processes that are fundamental to life and to human health. Fluorinated carbohydrate analogues play an important role in the study of these interactions and find application as probes in chemical biology and as drugs/diagnostics in medicine. The availability and/or efficient synthesis of a wide variety of fluorinated carbohydrates is thus of great interest. Here, we report a detailed study on the synthesis of monosaccharides in which the hydroxy groups at their 4- and 6-positions are replaced by all possible mono- and difluorinated motifs. Minimization of protecting group use was a key aim. It was found that introducing electronegative substituents, either as protecting groups or as deoxygenation intermediates, was generally beneficial for increasing deoxyfluorination yields. A detailed structural study of this set of analogues demonstrated that dideoxygenation/fluorination at the 4,6-positions caused very little distortion both in the solid state and in aqueous solution. Unexpected trends in α/β anomeric ratios were identified. Increasing fluorine content always increased the α/β ratio, with very little difference between regio- or stereoisomers, except when 4,6-difluorinated.
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Affiliation(s)
- David E Wheatley
- School of Chemistry, University of Southampton, Highfield, Southampton SO17 1BJ, U.K
| | - Clement Q Fontenelle
- School of Chemistry, University of Southampton, Highfield, Southampton SO17 1BJ, U.K
| | - Ramakrishna Kuppala
- School of Chemistry, University of Southampton, Highfield, Southampton SO17 1BJ, U.K
| | - Robert Szpera
- School of Chemistry, University of Southampton, Highfield, Southampton SO17 1BJ, U.K
| | - Edward L Briggs
- School of Chemistry, University of Southampton, Highfield, Southampton SO17 1BJ, U.K
| | | | - Neil J Wells
- School of Chemistry, University of Southampton, Highfield, Southampton SO17 1BJ, U.K
| | - Mark E Light
- School of Chemistry, University of Southampton, Highfield, Southampton SO17 1BJ, U.K
| | - Bruno Linclau
- School of Chemistry, University of Southampton, Highfield, Southampton SO17 1BJ, U.K
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8
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Khan I, Ibrar A, Zaib S. Alkynoates as Versatile and Powerful Chemical Tools for the Rapid Assembly of Diverse Heterocycles under Transition-Metal Catalysis: Recent Developments and Challenges. Top Curr Chem (Cham) 2021; 379:3. [PMID: 33398642 DOI: 10.1007/s41061-020-00316-4] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2020] [Accepted: 11/16/2020] [Indexed: 12/15/2022]
Abstract
Heterocycles, heteroaromatics and spirocyclic entities are ubiquitous components of a wide plethora of synthetic drugs, biologically active natural products, marketed pharmaceuticals and agrochemical targets. Recognizing their high proportion in drugs and rich pharmacological potential, these invaluable structural motifs have garnered significant interest, thus enabling the development of efficient catalytic methodologies providing access to architecturally complex and diverse molecules with high atom-economy and low cost. These chemical processes not only allow the formation of diverse heterocycles but also utilize a range of flexible and easily accessible building units in a single operation to discover diversity-oriented synthetic approaches. Alkynoates are significantly important, diverse and powerful building blocks in organic chemistry due to their unique and inherent properties such as the electronic bias on carbon-carbon triple bonds posed by electron-withdrawing groups or the metallic coordination site provided by carbonyl groups. The present review highlights the comprehensive picture of the utility of alkynoates (2007-2019) for the synthesis of various heterocycles (> 50 types) using transition-metal catalysts (Ru, Rh, Pd, Ir, Ag, Au, Pt, Cu, Mn, Fe) in various forms. The valuable function of versatile alkynoates (bearing multifunctional groups) as simple and useful starting materials is explored, thus cyclizing with an array of coupling partners to deliver a broad range of oxygen-, nitrogen-, sulfur-containing heterocycles alongside fused-, and spiro-heterocyclic compounds. In addition, these examples will also focus the scope and reaction limitations, as well as mechanistic investigations into the synthesis of these heterocycles. The biological significance will also be discussed, citing relevant examples of drug molecules highlighting each class of heterocycles. This review summarizes the recent developments in the synthetic methods for the synthesis of various heterocycles using alkynoates as readily available starting materials under transition-metal catalysis.
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Affiliation(s)
- Imtiaz Khan
- Department of Chemistry, School of Natural Sciences, The University of Manchester, Oxford Road, Manchester, M13 9PL, UK.
- Manchester Institute of Biotechnology, The University of Manchester, 131 Princess Street, Manchester, M1 7DN, UK.
| | - Aliya Ibrar
- Department of Chemistry, Faculty of Natural Sciences, The University of Haripur, Haripur, KPK-22620, Pakistan
| | - Sumera Zaib
- Department of Biochemistry, Faculty of Life Sciences, University of Central Punjab, Lahore, 54590, Pakistan
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9
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Gorbunov D, Nenasheva M, Gorbunov A, Matsukevich R, Maximov A, Karakhanov E. One-pot synthesis of short-chain cyclic acetals via tandem hydroformylation–acetalization under biphasic conditions. REACT CHEM ENG 2021. [DOI: 10.1039/d1re00070e] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
A novel method of producing short-chain acetals via tandem hydroformylation–acetalization under biphasic conditions is developed.
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Affiliation(s)
- Dmitry Gorbunov
- Department of Petroleum Chemistry and Organic Catalysis
- Faculty of Chemistry
- Moscow State University
- Moscow
- Russia
| | - Maria Nenasheva
- Department of Petroleum Chemistry and Organic Catalysis
- Faculty of Chemistry
- Moscow State University
- Moscow
- Russia
| | - Alexander Gorbunov
- Department of Petroleum Chemistry and Organic Catalysis
- Faculty of Chemistry
- Moscow State University
- Moscow
- Russia
| | - Roman Matsukevich
- Department of Petroleum Chemistry and Organic Catalysis
- Faculty of Chemistry
- Moscow State University
- Moscow
- Russia
| | - Anton Maximov
- Topchiev Institute of Petrochemical Synthesis RAS
- Moscow
- Russia
| | - Eduard Karakhanov
- Department of Petroleum Chemistry and Organic Catalysis
- Faculty of Chemistry
- Moscow State University
- Moscow
- Russia
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10
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Jeanneret RA, Johnson SE, Galan MC. Conformationally Constrained Glycosyl Donors as Tools to Control Glycosylation Outcomes. J Org Chem 2020; 85:15801-15826. [DOI: 10.1021/acs.joc.0c02045] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Robin A. Jeanneret
- School of Chemistry, University of Bristol, Cantock’s
Close, Bristol BS8 1TS, United Kingdom
| | - Simon E. Johnson
- School of Chemistry, University of Bristol, Cantock’s
Close, Bristol BS8 1TS, United Kingdom
| | - M. Carmen Galan
- School of Chemistry, University of Bristol, Cantock’s
Close, Bristol BS8 1TS, United Kingdom
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11
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Nikahd M, Mikusek J, Banwell MG, Yu LJ, Coote ML, Gardiner MG. Further, Small-Molecule Pyrolysis Products Derived from Chitin. Aust J Chem 2020. [DOI: 10.1071/ch20172] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
In an ongoing study of the products formed on pyrolysis of chitin (4) under a range of conditions, we now detail the isolation and characterisation of the crystalline and hitherto undetected pyridine N-oxide 18 and enamide 19. Pathways for the formation of these products have been proposed and subjected to both experimental and computational assessment.
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12
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Ohira S, Kuboki A, Takimoto Y, Matsuda K, Itasaki S, Urushibata Y, Takano Y, Nakamura Y. Novel protection of 1,2-diol for trans-dihydroxycyclopentene ring construction by the C H insertion of alkylidene carbene: Formal total synthesis of (+)-trehazolin. Tetrahedron Lett 2019. [DOI: 10.1016/j.tetlet.2019.151085] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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13
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San Segundo M, Correa A. Site-Selective Cu-Catalyzed Alkylation of α-Amino Acids and Peptides toward the Assembly of Quaternary Centers. CHEMSUSCHEM 2018; 11:3893-3898. [PMID: 30320455 DOI: 10.1002/cssc.201802216] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/26/2018] [Revised: 10/15/2018] [Indexed: 06/08/2023]
Abstract
The CuI -catalyzed selective α-alkylation of α-amino acid and peptide derivatives with 2-alkyl-1,3-dioxolanes is reported. This oxidative coupling is distinguished by its site-specificity, high diastereoselectivity, and chirality preservation and exhibits absolute chemoselectivity for N-aryl glycine motifs over other amino acid units. Collectively, the method allows for the assembly of challenging quaternary centers, as well as compounds derived from natural products of high structural complexity, which may provide ample opportunities for late-stage functionalization of peptides.
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Affiliation(s)
- Marcos San Segundo
- University of the Basque Country (UPV/EHU), Department of Organic Chemistry I, Joxe Mari Korta R&D Center, Avda. Tolosa 72, 20018, Donostia-San Sebastián, Spain
| | - Arkaitz Correa
- University of the Basque Country (UPV/EHU), Department of Organic Chemistry I, Joxe Mari Korta R&D Center, Avda. Tolosa 72, 20018, Donostia-San Sebastián, Spain
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14
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Carvalho LCR, Queda F, Almeida CV, Filipe SR, Marques MMB. From a Natural Polymer to Relevant NAG‐NAM Precursors. ASIAN J ORG CHEM 2018. [DOI: 10.1002/ajoc.201800592] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Luísa C. R. Carvalho
- LAQV@REQUIMTE, Departamento de Química, Faculdade de Ciências e TecnologiaUniversidade Nova de Lisboa Campus de Caparica 2829-516 Caparica Portugal
| | - Fausto Queda
- LAQV@REQUIMTE, Departamento de Química, Faculdade de Ciências e TecnologiaUniversidade Nova de Lisboa Campus de Caparica 2829-516 Caparica Portugal
| | - Cátia V. Almeida
- LAQV@REQUIMTE, Departamento de Química, Faculdade de Ciências e TecnologiaUniversidade Nova de Lisboa Campus de Caparica 2829-516 Caparica Portugal
| | - Sérgio R. Filipe
- UCIBIO@REQUIMTE, Departamento de Ciências da Vida, Faculdade de Ciências e TecnologiaUniversidade Nova de Lisboa Campus de Caparica 2829-516 Caparica Portugal
- Laboratory of Bacterial Cell Surfaces and Pathogenesis, Instituto de Tecnologia Química e BiológicaUniversidade Nova de Lisboa 2780-157 Oeiras Portugal
| | - M. Manuel B. Marques
- LAQV@REQUIMTE, Departamento de Química, Faculdade de Ciências e TecnologiaUniversidade Nova de Lisboa Campus de Caparica 2829-516 Caparica Portugal
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15
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Diehl Née Knobloch E, Brückner R. Turning the Nitrogen Atoms of an Ar 2 P-CH 2 -N-N-CH 2 -PAr 2 Motif into Uniquely Configured Stereocenters: A Novel Diphosphane Design for Asymmetric Catalysis. Chemistry 2018; 24:3429-3433. [PMID: 29292850 DOI: 10.1002/chem.201706160] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2017] [Indexed: 12/13/2022]
Abstract
Hexahydropyridazines with CH2 PAr2 groups at both N atoms are newly designed 1,4-diphosphanes and were synthesized for the first time. Their N atoms assume a single configuration under the influence of stereocenters at C-5 and C-6. In the solid state, these N-atoms bind the CH2 PAr2 substituents axially. Combined with Pd0 , N,N'-chiral diphosphanes of this kind catalyzed Tsuji-Trost type allylations of dialkyl malonates with racemic 1,3-diphenylallyl acetate efficiently and with up to 91 % ee.
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Affiliation(s)
- Eva Diehl Née Knobloch
- Institut für Organische Chemie, Albert-Ludwigs-Universität Freiburg, Albertstr. 21, 79104, Freiburg, Germany.,DSM Nutritional Products, Manufacturing Site Grenzach, Emil-Barell-Str. 3, 79639, Grenzach-Wyhlen, Germany
| | - Reinhard Brückner
- Institut für Organische Chemie, Albert-Ludwigs-Universität Freiburg, Albertstr. 21, 79104, Freiburg, Germany
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16
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Madsen J, Madden G, Themistou E, Warren NJ, Armes SP. pH-Responsive diblock copolymers with two different fluorescent labels for simultaneous monitoring of micellar self-assembly and degree of protonation. Polym Chem 2018. [DOI: 10.1039/c8py00111a] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
Facile labelling of both blocks of a pH-responsive diblock copolymer with different fluorophores allows monitoring of polymer aggregation and deprotonation.
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Affiliation(s)
- Jeppe Madsen
- Department of Chemistry
- University of Sheffield
- Sheffield
- UK
- Danish Polymer Centre
| | | | - Efrosyni Themistou
- School of Chemistry and Chemical Engineering
- Queen's University Belfast
- Belfast BT9 5AG
- UK
| | - Nicholas J. Warren
- Department of Chemistry
- University of Sheffield
- Sheffield
- UK
- School of Chemical and Process Engineering
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17
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Fontenelle CQ, Kuppala R, Light M, Linclau B. Isolation and characterisation of an unexpected byproduct in the regioselective butane diacetal protection of α-methyl galactopyranoside. Carbohydr Res 2018; 455:14-17. [DOI: 10.1016/j.carres.2017.10.023] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2017] [Revised: 10/29/2017] [Accepted: 10/29/2017] [Indexed: 10/18/2022]
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18
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Iwasaki K, Sasaki S, Kasai Y, Kawashima Y, Sasaki S, Ito T, Yotsu-Yamashita M, Sasaki M. Total Synthesis of Polycavernosides A and B, Two Lethal Toxins from Red Alga. J Org Chem 2017; 82:13204-13219. [PMID: 29124933 DOI: 10.1021/acs.joc.7b02293] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Polycavernosides A and B are glycosidic macrolide natural products isolated as the toxins causing fatal human poisoning by the edible red alga Gracilaria edulis (Polycavernosa tsudai). Total synthesis of polycavernosides A and B has been achieved via a convergent approach. The synthesis of the macrolactone core structure is highlighted by the catalytic asymmetric syntheses of the two key fragments using hetero-Diels-Alder reaction and Kiyooka aldol reaction as the key steps, their union through Suzuki-Miyaura coupling, and Keck macrolactonization. Finally, glycosylation with the l-fucosyl-d-xylose unit and construction of the polyene side chain through Stille coupling completed the total synthesis of polycavernosides A and B.
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Affiliation(s)
- Kotaro Iwasaki
- Graduate School of Life Sciences, Tohoku University , 2-1-1 Katahira, Aoba-ku, Sendai 980-8577, Japan
| | - Satori Sasaki
- Graduate School of Life Sciences, Tohoku University , 2-1-1 Katahira, Aoba-ku, Sendai 980-8577, Japan
| | - Yusuke Kasai
- Graduate School of Life Sciences, Tohoku University , 2-1-1 Katahira, Aoba-ku, Sendai 980-8577, Japan
| | - Yuki Kawashima
- Graduate School of Life Sciences, Tohoku University , 2-1-1 Katahira, Aoba-ku, Sendai 980-8577, Japan
| | - Shohei Sasaki
- Graduate School of Life Sciences, Tohoku University , 2-1-1 Katahira, Aoba-ku, Sendai 980-8577, Japan
| | - Takanori Ito
- Graduate School of Life Sciences, Tohoku University , 2-1-1 Katahira, Aoba-ku, Sendai 980-8577, Japan
| | - Mari Yotsu-Yamashita
- Graduate School of Agricultural Science, Tohoku University , 468-1 Aramaki-Aza-Aoba, Aoba-ku, Sendai 980-0845, Japan
| | - Makoto Sasaki
- Graduate School of Life Sciences, Tohoku University , 2-1-1 Katahira, Aoba-ku, Sendai 980-8577, Japan
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19
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Rigid diol bearing 6-6-6 fused ring system derived from naturally occurring myo
-inositol and its polyaddition with diisocyanates. ACTA ACUST UNITED AC 2017. [DOI: 10.1002/pola.28765] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
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20
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Buckler JN, Taher ES, Fraser NJ, Willis AC, Carr PD, Jackson CJ, Banwell MG. The Synthesis of Certain Derivatives and Analogues of (−)- and (+)-Galanthamine and an Assessment of their Capacities to Inhibit Acetylcholine Esterase. J Org Chem 2017; 82:7869-7886. [DOI: 10.1021/acs.joc.7b01062] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Joshua N. Buckler
- Research School of Chemistry,
Institute of Advanced Studies, The Australian National University, Canberra, Australian Capital Territory 2601, Australia
| | - Ehab S. Taher
- Research School of Chemistry,
Institute of Advanced Studies, The Australian National University, Canberra, Australian Capital Territory 2601, Australia
| | - Nicolas J. Fraser
- Research School of Chemistry,
Institute of Advanced Studies, The Australian National University, Canberra, Australian Capital Territory 2601, Australia
| | - Anthony C. Willis
- Research School of Chemistry,
Institute of Advanced Studies, The Australian National University, Canberra, Australian Capital Territory 2601, Australia
| | - Paul D. Carr
- Research School of Chemistry,
Institute of Advanced Studies, The Australian National University, Canberra, Australian Capital Territory 2601, Australia
| | - Colin J. Jackson
- Research School of Chemistry,
Institute of Advanced Studies, The Australian National University, Canberra, Australian Capital Territory 2601, Australia
| | - Martin G. Banwell
- Research School of Chemistry,
Institute of Advanced Studies, The Australian National University, Canberra, Australian Capital Territory 2601, Australia
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21
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Drop A, Wojtasek H, Frąckowiak-Wojtasek B. Selective isomerization of a trans -butanediacetal derivative of tartaric acid with differentiating substituents at C-2 and C-3. Tetrahedron Lett 2017. [DOI: 10.1016/j.tetlet.2017.02.072] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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22
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Matsumura S, Matsui Y, Nagatomo M, Inoue M. Stereoselective construction of anti - and syn -1,2-diol structures via decarbonylative radical coupling of α-alkoxyacyl tellurides. Tetrahedron 2016. [DOI: 10.1016/j.tet.2016.06.056] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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23
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Mönnich M, Eller S, Karagiannis T, Perkams L, Luber T, Ott D, Niemietz M, Hoffman J, Walcher J, Berger L, Pischl M, Weishaupt M, Wirkner C, Lichtenstein RG, Unverzagt C. Hocheffiziente Synthese von multiantennären “bisected” N-Glycanen über Imidate. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201604190] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Manuel Mönnich
- Bioorganische Chemie, Gebäude NW1; Universität Bayreuth; 95440 Bayreuth Deutschland
| | - Steffen Eller
- Bioorganische Chemie, Gebäude NW1; Universität Bayreuth; 95440 Bayreuth Deutschland
| | | | - Lukas Perkams
- Bioorganische Chemie, Gebäude NW1; Universität Bayreuth; 95440 Bayreuth Deutschland
| | - Thomas Luber
- Bioorganische Chemie, Gebäude NW1; Universität Bayreuth; 95440 Bayreuth Deutschland
| | - Dimitri Ott
- Bioorganische Chemie, Gebäude NW1; Universität Bayreuth; 95440 Bayreuth Deutschland
| | - Mathäus Niemietz
- Bioorganische Chemie, Gebäude NW1; Universität Bayreuth; 95440 Bayreuth Deutschland
| | - Joanna Hoffman
- Bioorganische Chemie, Gebäude NW1; Universität Bayreuth; 95440 Bayreuth Deutschland
| | - Janika Walcher
- Bioorganische Chemie, Gebäude NW1; Universität Bayreuth; 95440 Bayreuth Deutschland
| | - Lukas Berger
- Bioorganische Chemie, Gebäude NW1; Universität Bayreuth; 95440 Bayreuth Deutschland
| | - Matthias Pischl
- Bioorganische Chemie, Gebäude NW1; Universität Bayreuth; 95440 Bayreuth Deutschland
| | - Markus Weishaupt
- Bioorganische Chemie, Gebäude NW1; Universität Bayreuth; 95440 Bayreuth Deutschland
| | - Cathrin Wirkner
- Bioorganische Chemie, Gebäude NW1; Universität Bayreuth; 95440 Bayreuth Deutschland
| | - Rachel G. Lichtenstein
- Department of Biotechnology Engineering; Ben-Gurion University of the Negev; Beer-Sheva 84105 Israel
| | - Carlo Unverzagt
- Bioorganische Chemie, Gebäude NW1; Universität Bayreuth; 95440 Bayreuth Deutschland
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24
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Mönnich M, Eller S, Karagiannis T, Perkams L, Luber T, Ott D, Niemietz M, Hoffman J, Walcher J, Berger L, Pischl M, Weishaupt M, Wirkner C, Lichtenstein RG, Unverzagt C. Highly Efficient Synthesis of Multiantennary Bisected N-glycans Based on Imidates. Angew Chem Int Ed Engl 2016; 55:10487-92. [PMID: 27443163 DOI: 10.1002/anie.201604190] [Citation(s) in RCA: 35] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2016] [Indexed: 12/11/2022]
Abstract
The occurrence of N-glycans with a bisecting GlcNAc modification on glycoproteins has many implications in developmental and immune biology. However, these particular N-glycans are difficult to obtain either from nature or through synthesis. We have developed a flexible and general method for synthesizing bisected N-glycans of the complex type by employing modular TFAc-protected donors for all antennae. The TFAc-protected N-glycans are suitable for the late introduction of a bisecting GlcNAc. This integrated strategy permits for the first time the use of a single approach for multiantennary N-glycans as well as their bisected derivatives via imidates, with unprecedented yields even in a one-pot double glycosylation. With this new method, rare N-glycans of the bisected type can be obtained readily, thereby providing defined tools to decipher the biological roles of bisecting GlcNAc modifications.
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Affiliation(s)
- Manuel Mönnich
- Bioorganische Chemie, Gebäude NW1, Universität Bayreuth, 95440, Bayreuth, Germany
| | - Steffen Eller
- Bioorganische Chemie, Gebäude NW1, Universität Bayreuth, 95440, Bayreuth, Germany
| | | | - Lukas Perkams
- Bioorganische Chemie, Gebäude NW1, Universität Bayreuth, 95440, Bayreuth, Germany
| | - Thomas Luber
- Bioorganische Chemie, Gebäude NW1, Universität Bayreuth, 95440, Bayreuth, Germany
| | - Dimitri Ott
- Bioorganische Chemie, Gebäude NW1, Universität Bayreuth, 95440, Bayreuth, Germany
| | - Mathäus Niemietz
- Bioorganische Chemie, Gebäude NW1, Universität Bayreuth, 95440, Bayreuth, Germany
| | - Joanna Hoffman
- Bioorganische Chemie, Gebäude NW1, Universität Bayreuth, 95440, Bayreuth, Germany
| | - Janika Walcher
- Bioorganische Chemie, Gebäude NW1, Universität Bayreuth, 95440, Bayreuth, Germany
| | - Lukas Berger
- Bioorganische Chemie, Gebäude NW1, Universität Bayreuth, 95440, Bayreuth, Germany
| | - Matthias Pischl
- Bioorganische Chemie, Gebäude NW1, Universität Bayreuth, 95440, Bayreuth, Germany
| | - Markus Weishaupt
- Bioorganische Chemie, Gebäude NW1, Universität Bayreuth, 95440, Bayreuth, Germany
| | - Cathrin Wirkner
- Bioorganische Chemie, Gebäude NW1, Universität Bayreuth, 95440, Bayreuth, Germany
| | - Rachel G Lichtenstein
- Department of Biotechnology Engineering, Ben-Gurion University of the Negev, Beer-Sheva, 84105, Israel
| | - Carlo Unverzagt
- Bioorganische Chemie, Gebäude NW1, Universität Bayreuth, 95440, Bayreuth, Germany.
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25
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Dorel R, Echavarren AM. Gold(I)-Catalyzed Activation of Alkynes for the Construction of Molecular Complexity. Chem Rev 2015; 115:9028-72. [PMID: 25844920 PMCID: PMC4580024 DOI: 10.1021/cr500691k] [Citation(s) in RCA: 1311] [Impact Index Per Article: 145.7] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2014] [Indexed: 12/17/2022]
Affiliation(s)
- Ruth Dorel
- Institute of Chemical
Research of Catalonia (ICIQ), Av. Països
Catalans 16, 43007 Tarragona, Spain
| | - Antonio M. Echavarren
- Institute of Chemical
Research of Catalonia (ICIQ), Av. Països
Catalans 16, 43007 Tarragona, Spain
- Departament
de Química Analítica i Química Orgànica, Universitat Rovira i Virgili, C/Marcel·lí Domingo s/n, 43007 Tarragona, Spain
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26
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Herczeg M, Demeter F, Mező E, Pap M, Borbás A. Simultaneous Application of Arylmethylene Acetal and Butane Diacetal Groups for Protection of Hexopyranosides: Synthesis and Chemoselective Ring-Opening Reactions. European J Org Chem 2015. [DOI: 10.1002/ejoc.201500732] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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27
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Willwacher J, Heggen B, Wirtz C, Thiel W, Fürstner A. Total Synthesis, Stereochemical Revision, and Biological Reassessment of Mandelalide A: Chemical Mimicry of Intrafamily Relationships. Chemistry 2015; 21:10416-30. [PMID: 26094957 DOI: 10.1002/chem.201501491] [Citation(s) in RCA: 81] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2015] [Indexed: 11/06/2022]
Abstract
Mandelalide A and three congeners had recently been isolated as the supposedly highly cytotoxic principles of an ascidian collected off the South African coastline. Since these compounds are hardly available from the natural source, a concise synthesis route was developed, targeting structure 1 as the purported representation of mandelalide A. The sequence involves an iridium-catalyzed two-directional Krische allylation and a cobalt-catalyzed carbonylative epoxide opening as entry points for the preparation of the major building blocks. The final stages feature the first implementation of terminal acetylene metathesis into natural product total synthesis, which is remarkable in that this class of substrates had been beyond the reach of alkyne metathesis for decades. Synthetic 1, however, proved not to be identical with the natural product. In an attempt to clarify this issue, NMR spectra were simulated for 20 conceivable diastereomers by using DFT followed by DP4 analysis; however, this did not provide a reliable assignment either. The puzzle was ultimately solved by the preparation of three diastereomers, of which compound 6 proved identical with mandelalide A in all analytical and spectroscopic regards. As the entire "northern sector" about the tetrahydrofuran ring in 6 shows the opposite configuration of what had originally been assigned, it is highly likely that the stereostructures of the sister compounds mandelalides B-D must be corrected analogously; we propose that these natural products are accurately represented by structures 68-70. In an attempt to prove this reassignment, an entry into mandelalides C and D was sought by subjecting an advanced intermediate of the synthesis of 6 to a largely unprecedented intramolecular Morita-Baylis-Hillman reaction, which furnished the γ-lactone derivative 74 as a mixture of diastereomers. Whereas (24R)-74 was amenable to a hydroxyl-directed dihydroxylation by using OsO4 /TMEDA as the reagent, the sister compound (24S)-74 did not follow a directed path but simply obeyed Kishi's rule; only this unexpected escape precluded the preparation of mandelalides C and D by this route. A combined spectroscopic and computational (DFT) study showed that the reasons for this strikingly different behavior of the two diastereomers of 74 are rooted in their conformational peculiarities. This aspect apart, our results show that the OsO4 /TMEDA complex reacts preferentially with electron deficient double bonds even if other alkenes are present that are more electron rich and less encumbered. Finally, in a brief biological survey authentic mandelalide A (6) was found to exhibit appreciable cytotoxicity only against one out of three tested human cancer cell lines and all synthetic congeners were hardly active. No significant fungicidal properties were observed.
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Affiliation(s)
- Jens Willwacher
- Max-Planck-Institut für Kohlenforschung, 45470 Mülheim/Ruhr (Germany)
| | - Berit Heggen
- Max-Planck-Institut für Kohlenforschung, 45470 Mülheim/Ruhr (Germany)
| | - Conny Wirtz
- Max-Planck-Institut für Kohlenforschung, 45470 Mülheim/Ruhr (Germany)
| | - Walter Thiel
- Max-Planck-Institut für Kohlenforschung, 45470 Mülheim/Ruhr (Germany)
| | - Alois Fürstner
- Max-Planck-Institut für Kohlenforschung, 45470 Mülheim/Ruhr (Germany).
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28
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Devising New Syntheses of the Alkaloid Galanthamine, a Potent and Clinically Deployed Inhibitor of Acetylcholine Esterase. ACTA ACUST UNITED AC 2015. [DOI: 10.1016/b978-0-08-100023-6.00002-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register]
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29
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Walk JT, Buchan ZA, Montgomery J. Sugar Silanes: Versatile Reagents for Stereocontrolled Glycosylation via Intramolecular Aglycone Delivery. Chem Sci 2015; 6:3448-3453. [PMID: 26000163 PMCID: PMC4435934 DOI: 10.1039/c5sc00810g] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A new method for the intramolecular glycosylation of alcohols is described.
A new method for the intramolecular glycosylation of alcohols is described. Utilizing carbohydrate-derived silanes, the catalytic dehydrogenative silylation of alcohols is followed by intramolecular glycosylation. Appropriate combinations of silane position and protecting groups allow highly selective access to β-manno, α-gluco, or β-gluco stereochemical relationships as well as 2-azido-2-deoxy-β-gluco- and 2-deoxy-β-glucosides. Intramolecular aglycone delivery from the C-2 or C-6 position provides 1,2-cis or 1,2-trans glycosides, respectively. Multifunctional acceptor substrates such as hydroxyketones and diols are tolerated and are glycosylated in a site-selective manner.
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Affiliation(s)
- Jordan T Walk
- Department of Chemistry, University of Michigan, 930 N. University Ave., Ann Arbor, MI, 48109-1055, USA. All work was performed at this address
| | - Zachary A Buchan
- Department of Chemistry, University of Michigan, 930 N. University Ave., Ann Arbor, MI, 48109-1055, USA. All work was performed at this address
| | - John Montgomery
- Department of Chemistry, University of Michigan, 930 N. University Ave., Ann Arbor, MI, 48109-1055, USA. All work was performed at this address
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30
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Willwacher J, Fürstner A. Catalysis-Based Total Synthesis of Putative Mandelalide A. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201400605] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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31
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Willwacher J, Fürstner A. Catalysis-Based Total Synthesis of Putative Mandelalide A. Angew Chem Int Ed Engl 2014; 53:4217-21. [DOI: 10.1002/anie.201400605] [Citation(s) in RCA: 98] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2014] [Indexed: 12/26/2022]
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32
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Alvarez-Dorta D, León EI, Kennedy AR, Martín A, Pérez-Martín I, Riesco-Fagundo C, Suárez E. Photochemistry of α-Diketones in Carbohydrates: Anomalous Norrish Type II Photoelimination and Norrish-Yang Photocyclization Promoted by the Internal Carbonyl Group. Chemistry 2014; 20:2663-71. [DOI: 10.1002/chem.201303843] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2013] [Indexed: 11/08/2022]
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33
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Shimizu M, Hachiya I, Yamamoto T, Inagaki T, Matsumoto T, Takahashi A, Mizota I. Two-Step Synthesis of 3,4-Ethylenedioxythiophene (EDOT) from 2,3-Butanedione. HETEROCYCLES 2014. [DOI: 10.3987/com-13-s(s)8] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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34
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Mensah E, Camasso N, Kaplan W, Nagorny P. Chiral Phosphoric Acid Directed Regioselective Acetalization of Carbohydrate-Derived 1,2-Diols. Angew Chem Int Ed Engl 2013. [DOI: 10.1002/ange.201304298] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
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35
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Mensah E, Camasso N, Kaplan W, Nagorny P. Chiral Phosphoric Acid Directed Regioselective Acetalization of Carbohydrate-Derived 1,2-Diols. Angew Chem Int Ed Engl 2013; 52:12932-6. [DOI: 10.1002/anie.201304298] [Citation(s) in RCA: 68] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2013] [Revised: 07/29/2013] [Indexed: 01/21/2023]
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36
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Wang CC, Tang Y, Yang K, Li XY, Wu YB, Hsung RP. A carbohydrate based chiron approach to the lactone intermediate employed in the synthesis of BC-ring fragment of (+)-spirastrellolide A. Tetrahedron 2013. [DOI: 10.1016/j.tet.2013.07.009] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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37
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Barroso S, Geerdink D, ter Horst B, Casas-Arce E, Minnaard AJ. Total Synthesis of the Phenolic Glycolipid Mycoside B and the Glycosylatedp-Hydroxybenzoic Acid Methyl Ester HBAD-I, Virulence Markers ofMycobacterium tuberculosis. European J Org Chem 2013. [DOI: 10.1002/ejoc.201300437] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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38
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Kurane R, Gaikwad V, Jadhav J, Salunkhe R, Rashinkar G. Ferrocene tagged functional polymer: a robust solid-phase reagent for O-demethylation. Tetrahedron Lett 2012. [DOI: 10.1016/j.tetlet.2012.09.021] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
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39
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Heuckendorff M, Pedersen CM, Bols M. Rhamnosylation: diastereoselectivity of conformationally armed donors. J Org Chem 2012; 77:5559-68. [PMID: 22639871 DOI: 10.1021/jo300591k] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The α/β-selectivity of super-armed rhamnosyl donors have been investigated in glycosylation reactions. The solvent was found to have a minor influence, whereas temperature was crucial for the diastereoselectivity. At very low temperature, a modest β-selectivity could be obtained, and increasing temperature gave excellent α-selectivity. The donors were highly reactive, and activation was observed at temperatures as low as -107 °C. Different promoter systems and leaving groups were investigated, and only activation with a heterogeneous catalyst increased the amount of the β-anomer significantly. By introducing an electron-withdrawing nonparticipating group, benzyl sulfonyl, on 2-O, an increase in β-product was observed.
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Affiliation(s)
- Mads Heuckendorff
- Department of Chemistry, University of Copenhagen, Universitetsparken 5, 2100 Copenhagen, Denmark
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40
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Kleinbeck F, Fettes GJ, Fader LD, Carreira EM. Total Synthesis of Bafilomycin A1. Chemistry 2012; 18:3598-610. [DOI: 10.1002/chem.201102797] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2011] [Indexed: 11/06/2022]
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41
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Ramarao C, Nandipati R, Navakoti R, Kottamasu R. Synthesis and use of chiral substituted benzenes containing 1,2-diols protected as cyclic acetals. Tetrahedron Lett 2012. [DOI: 10.1016/j.tetlet.2011.11.111] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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42
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Burns DJ, Hachisu S, O'Brien P, Taylor RJK. Catalytic asymmetric synthesis of butane diacetal-protected (4S,5S)-dihydroxycyclohexen-1-one and use in natural product synthesis. Org Biomol Chem 2012; 10:7666-8. [DOI: 10.1039/c2ob26406d] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Affiliation(s)
- David J Burns
- Department of Chemistry, University of York, Heslington, York YO10 5DD, UK
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Lourenço EC, Ventura MR. Synthesis of Potassium (2R)-2-O-α-D-Mannopyranosyl-(1→2)-α-D-glucopyranosyl-2,3-dihydroxypropanoate: A Naturally Compatible Solute. European J Org Chem 2011. [DOI: 10.1002/ejoc.201100934] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Khasanova LS, Gimalova FA, Torosyan SA, Fatykhov AA, Miftakhov MS. Disaccharide blocks for analogs of OSW-1. RUSSIAN JOURNAL OF ORGANIC CHEMISTRY 2011. [DOI: 10.1134/s107042801108001x] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Corma A, Leyva-Pérez A, Sabater MJ. Gold-catalyzed carbon-heteroatom bond-forming reactions. Chem Rev 2011; 111:1657-712. [PMID: 21391565 DOI: 10.1021/cr100414u] [Citation(s) in RCA: 1111] [Impact Index Per Article: 85.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- A Corma
- Instituto de Tecnología Química UPV-CSIC, Universidad Politécnica de Valencia-Consejo Superior de Investigaciones Científicas, Avenida Los Naranjos s/n, 46022, Valencia, Spain.
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Shing TK, Chen Y, Ng WL. Carbocyclization of d-glucose: syntheses of gabosine I and streptol. Tetrahedron 2011. [DOI: 10.1016/j.tet.2011.06.028] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Siegbahn A, Aili U, Ochocinska A, Olofsson M, Rönnols J, Mani K, Widmalm G, Ellervik U. Synthesis, conformation and biology of naphthoxylosides. Bioorg Med Chem 2011; 19:4114-26. [DOI: 10.1016/j.bmc.2011.05.007] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2011] [Revised: 04/29/2011] [Accepted: 05/04/2011] [Indexed: 10/18/2022]
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Gassa F, Contini A, Fontana G, Pellegrino S, Gelmi ML. A Highly Diastereoselective Synthesis of α-Hydroxy-β-amino Acid Derivatives via a Lewis Acid Catalyzed Three-Component Condensation Reaction. J Org Chem 2010; 75:7099-106. [DOI: 10.1021/jo1011762] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Federico Gassa
- DISMAB, Sezione di Chimica Organica “A. Marchesini” Facoltà di Farmacia, Università di Milano, via Venezian 21, 20133 Milano, Italy
| | - Alessandro Contini
- DISMAB, Sezione di Chimica Organica “A. Marchesini” Facoltà di Farmacia, Università di Milano, via Venezian 21, 20133 Milano, Italy
| | | | - Sara Pellegrino
- DISMAB, Sezione di Chimica Organica “A. Marchesini” Facoltà di Farmacia, Università di Milano, via Venezian 21, 20133 Milano, Italy
| | - Maria Luisa Gelmi
- DISMAB, Sezione di Chimica Organica “A. Marchesini” Facoltà di Farmacia, Università di Milano, via Venezian 21, 20133 Milano, Italy
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Superarmed and superdisarmed building blocks in expeditious oligosaccharide synthesis. Top Curr Chem (Cham) 2010; 301:189-221. [PMID: 21120713 DOI: 10.1007/128_2010_106] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
: Traditional strategies for oligosaccharide synthesis often require extensive protecting and/or leaving group manipulations between each glycosylation step, thereby increasing the total number of synthetic steps while decreasing both the efficiency and yield. In contrast, expeditious strategies allow for the rapid chemical synthesis of complex carbohydrates by minimizing extraneous chemical manipulations. The armed-disarmed approach for chemoselective oligosaccharide synthesis is one such strategy that addresses these challenges. Herein, the significant improvements that have recently emerged in the area of chemoselective activation are discussed. These advancements have expanded the scope of the armed-disarmed methodology so that it can now be applied to a wider range of oligosaccharide sequences, in comparison to the original concept. Surveyed in this chapter are representative examples wherein these excellent innovations have already been applied to the synthesis of various oligosaccharides and glycoconjugates.
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