151
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Kim KH, Lee SY, Kim DG, Lee SY, Kim JY, Yoo JS. Absolute Quantification of N-Glycosylation of Alpha-Fetoprotein Using Parallel Reaction Monitoring with Stable Isotope-Labeled N-Glycopeptide as an Internal Standard. Anal Chem 2020; 92:12588-12595. [DOI: 10.1021/acs.analchem.0c02563] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Kwang Hoe Kim
- Research Center for Bioconvergence Analysis, Korea Basic Science Institute, 162 YeonGuDanji-Ro, Ochang-eup, Cheongju 28119, Republic of Korea
| | - Sang Yoon Lee
- Research Center for Bioconvergence Analysis, Korea Basic Science Institute, 162 YeonGuDanji-Ro, Ochang-eup, Cheongju 28119, Republic of Korea
- Graduate School of Analytical Science and Technology, Chungnam National University, Daejeon 34134, Republic of Korea
| | - Dong Geun Kim
- Research Center for Bioconvergence Analysis, Korea Basic Science Institute, 162 YeonGuDanji-Ro, Ochang-eup, Cheongju 28119, Republic of Korea
- Graduate School of Analytical Science and Technology, Chungnam National University, Daejeon 34134, Republic of Korea
| | - Soo-Youn Lee
- Department of Laboratory Medicine and Genetics, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul 06351, Republic of Korea
| | - Jin Young Kim
- Research Center for Bioconvergence Analysis, Korea Basic Science Institute, 162 YeonGuDanji-Ro, Ochang-eup, Cheongju 28119, Republic of Korea
| | - Jong Shin Yoo
- Research Center for Bioconvergence Analysis, Korea Basic Science Institute, 162 YeonGuDanji-Ro, Ochang-eup, Cheongju 28119, Republic of Korea
- Graduate School of Analytical Science and Technology, Chungnam National University, Daejeon 34134, Republic of Korea
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152
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Molla MR, Das P, Guleria K, Subramanian R, Kumar A, Thakur R. Cyanomethyl Ether as an Orthogonal Participating Group for Stereoselective Synthesis of 1,2- trans-β- O-Glycosides. J Org Chem 2020; 85:9955-9968. [PMID: 32600042 DOI: 10.1021/acs.joc.0c01249] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
Stereoselective formation of glycosidic linkages has been the prime focus for contemporary carbohydrate chemistry. Herein, we report cyanomethyl (CNMe) ether as an efficient and effective participating orthogonal protecting group for the stereoselective synthesis of 1,2-trans-β-O-glycosides. The participating group facilitated good to high β-selective glycosylation with a broad range of electron-rich and electron-deficient glycosyl acceptors. Detailed experimental and theoretical studies reveal the involvement of CNMe ether in the formation of a six-membered imine-type cyclic intermediate for the observed stereoselectivity. Rapid incorporation and selective removal of the CNMe ether group in the presence of benzyl ether and isopropylidene acetal protection have also been reported here. The nitrile group provided an opportunity for the glycodiversification through further derivatizations.
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Affiliation(s)
- Mosidur Rahaman Molla
- Department of Chemistry, National Institute of Technology Patna, Patna, Bihar 800005, India
| | - Pradip Das
- Department of Chemistry, National Institute of Technology Patna, Patna, Bihar 800005, India
| | - Kanika Guleria
- Department of Chemistry, Indian Institute of Technology Patna, Patna, Bihar 801103, India
| | - Ranga Subramanian
- Department of Chemistry, Indian Institute of Technology Patna, Patna, Bihar 801103, India
| | - Amit Kumar
- Department of Chemistry, Indian Institute of Technology Patna, Patna, Bihar 801103, India
| | - Rima Thakur
- Department of Chemistry, National Institute of Technology Patna, Patna, Bihar 800005, India
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153
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Fujino H, Fukuda T, Nagatomo M, Inoue M. Convergent Total Synthesis of Hikizimycin Enabled by Intermolecular Radical Addition to Aldehyde. J Am Chem Soc 2020; 142:13227-13234. [PMID: 32628018 DOI: 10.1021/jacs.0c06354] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Hikizimycin (1), which exhibits powerful anthelmintic activity, has the most densely functionalized structure among nucleoside antibiotics. A central 4-amino-4-deoxyundecose of 1 possesses 10 contiguous stereocenters on a C1-C11 linear chain and is decorated with a cytosine base at C1 and a 3-amino-3-deoxyglucose at C6-OH. These distinctive structural features of 1 make it an extremely challenging target for de novo construction. Herein, we report a convergent total synthesis of 1 from four known components: 3-azide-3-deoxyglucose derivative 4, bis-TMS-cytosine 5, d-mannose 9, and d-galactose derivative 10. We first designed and devised a novel radical coupling reaction between multiply hydroxylated aldehydes and α-alkoxyacyl tellurides. The generality and efficiency of this process was demonstrated by the coupling of 7c and 8, which were readily accessible from two hexoses, 9 and 10, respectively. Et3B and O2 rapidly induced decarbonylative radical formation from α-alkoxyacyl telluride 8, and intermolecular addition of the generated α-alkoxy radical to aldehyde 7c yielded 4-amino-4-deoxyundecose 6-α with installation of the desired C5,6-stereocenters. Subsequent attachments of the cytosine with 5 and of the 3-azide-3-deoxyglucose with 4 were realized through selective activation of the C1-acetal and selective deprotection of the C6-hydroxy group. Finally, the 3 amino and 10 hydroxy groups were liberated in a single step to deliver the target 1. Thus, the combination of the newly developed radical-coupling and protective-group strategies minimized the functional group manipulations and thereby enabled the synthesis of 1 from 10 in only 17 steps. The present total synthesis demonstrates the versatility of intermolecular radical addition to aldehyde for the first time and offers a new strategic design for multistep target-oriented syntheses of various nucleoside antibiotics and other bioactive natural products.
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Affiliation(s)
- Haruka Fujino
- Graduate School of Pharmaceutical Sciences, The University of Tokyo, Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan
| | - Takumi Fukuda
- Graduate School of Pharmaceutical Sciences, The University of Tokyo, Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan
| | - Masanori Nagatomo
- Graduate School of Pharmaceutical Sciences, The University of Tokyo, Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan
| | - Masayuki Inoue
- Graduate School of Pharmaceutical Sciences, The University of Tokyo, Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan
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154
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Ouyang W, Huang H, Yang R, Ding H, Xiao Q. First Total Synthesis of 5'- O-α-d-Glucopyranosyl Tubercidin. Mar Drugs 2020; 18:E398. [PMID: 32751067 PMCID: PMC7459636 DOI: 10.3390/md18080398] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2020] [Revised: 07/27/2020] [Accepted: 07/28/2020] [Indexed: 02/07/2023] Open
Abstract
The first total synthesis of 5'-O-α-d-glucopyranosyl tubercidin was successfully developed. It is a structurally unique disaccharide 7-deazapurine nucleoside exhibiting fungicidal activity, and was isolated from blue-green algae. The total synthesis was accomplished in eight steps with 27% overall yield from commercially available 1-O-acetyl-2,3,5-tri-O-benzoyl-β-d-ribose. The key step involves stereoselective α-O-glycosylation of the corresponding 7-bromo-6-chloro-2',3'-O-isopropylidene-β-d-tubercidin with 2,3,4,6-tetra-O-benzyl-glucopyranosyl trichloroacetimidate. All spectra are in accordance with the reported data for natural 5'-O-α-d-glucopyranosyl tubercidin. Meanwhile, 5'-O-β-d-glucopyranosyl tubercidin was also prepared using the same strategy.
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Affiliation(s)
| | - Haiyang Huang
- Jiangxi Key Laboratory of Organic Chemistry, Institute of Organic Chemistry, Jiangxi Science and Technology Normal University, Nanchang 330013, China; (W.O.); (R.Y.); (H.D.)
| | | | | | - Qiang Xiao
- Jiangxi Key Laboratory of Organic Chemistry, Institute of Organic Chemistry, Jiangxi Science and Technology Normal University, Nanchang 330013, China; (W.O.); (R.Y.); (H.D.)
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155
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Khanam A, Tiwari A, Mandal PK. Chiral auxiliaries: Usefullness in stereoselective glycosylation reactions and their synthetic applications. Carbohydr Res 2020; 495:108045. [PMID: 32679340 DOI: 10.1016/j.carres.2020.108045] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2020] [Revised: 05/07/2020] [Accepted: 05/22/2020] [Indexed: 01/01/2023]
Abstract
Oligosaccharides play a very important role in biological system and structure-activity relationships that is why it has a lot of application to medicinal chemistry and development of polysaccharide conjugate vaccines. The stereoselective introduction of a glycosidic linkage presents the principal challenge for biological importance oligosaccharide synthesis. The main aim of this review is to described the importance of chiral auxiliary and neibhouring group participation for the stereoselective 1,2-cis glycosidic bonds formation and their application in complex oligosaccharide synthesis.Numerous 1,2-cis-linked oligosaccharides and glyconjugates are naturally found in the compounds of blood group, human milk, antigens of bacterial lipopolysaccharide etc.that predominantly increased it's importance in this field.
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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, 226031, India
| | - Ashwani Tiwari
- Medicinal and Process Chemistry Division, CSIR-Central Drug Research Institute, BS-10/1, Sector 10, Jankipuram Extension, Sitapur Road, P.O. Box 173, Lucknow, 226031, India
| | - Pintu Kumar Mandal
- Medicinal and Process Chemistry Division, CSIR-Central Drug Research Institute, BS-10/1, Sector 10, Jankipuram Extension, Sitapur Road, P.O. Box 173, Lucknow, 226031, India; Academy of Scientific and Innovative Research, New Delhi, 110001, India.
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156
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Parvin N, Mishra B, George A, Neralkar M, Hossain J, Parameswaran P, Hotha S, Khan S. N-Heterocyclic silylene/germylene ligands in Au(i) catalysis. Chem Commun (Camb) 2020; 56:7625-7628. [PMID: 32515769 DOI: 10.1039/d0cc03156a] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Cationic Au(i) complexes (2, 5 and 8) supported by N-heterocyclic carbene, silylene and germylene ligands were prepared and their potential as catalysts in glycosidation chemistry has been evaluated. Insights into the mechanism are provided using DFT studies. Practical application of them as catalysts was achieved by the synthesis of the branched pentamannan core of the HIV-gp120 envelope under mild conditions.
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Affiliation(s)
- Nasrina Parvin
- Department of Chemistry, Indian Institute of Science Education and Research Pune, Dr Homi Bhabha Road, Pashan, Pune-411008, India.
| | - Bijoyananda Mishra
- Department of Chemistry, Indian Institute of Science Education and Research Pune, Dr Homi Bhabha Road, Pashan, Pune-411008, India.
| | - Anjana George
- Department of Chemistry, National Institute of Technology Calicut, NIT Campus P. O., Calicut-673601, India.
| | - Mahesh Neralkar
- Department of Chemistry, Indian Institute of Science Education and Research Pune, Dr Homi Bhabha Road, Pashan, Pune-411008, India.
| | - Jabed Hossain
- Department of Chemistry, Indian Institute of Science Education and Research Pune, Dr Homi Bhabha Road, Pashan, Pune-411008, India.
| | - Pattiyil Parameswaran
- Department of Chemistry, National Institute of Technology Calicut, NIT Campus P. O., Calicut-673601, India.
| | - Srinivas Hotha
- Department of Chemistry, Indian Institute of Science Education and Research Pune, Dr Homi Bhabha Road, Pashan, Pune-411008, India.
| | - Shabana Khan
- Department of Chemistry, Indian Institute of Science Education and Research Pune, Dr Homi Bhabha Road, Pashan, Pune-411008, India.
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157
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Liu M, Liu KM, Xiong DC, Zhang H, Li T, Li B, Qin X, Bai J, Ye XS. Stereoselective Electro-2-deoxyglycosylation from Glycals. Angew Chem Int Ed Engl 2020; 59:15204-15208. [PMID: 32394599 DOI: 10.1002/anie.202006115] [Citation(s) in RCA: 33] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2020] [Indexed: 11/09/2022]
Abstract
We report a novel and highly stereoselective electro-2-deoxyglycosylation from glycals. This method features excellent stereoselectivity, scope, and functional-group tolerance. This process can also be applied to the modification of a wide range of natural products and drugs. Furthermore, a scalable synthesis of glycosylated podophyllotoxin and a one-pot trisaccharide synthesis through iterative electroglycosylations were achieved.
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Affiliation(s)
- Miao Liu
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University, Xue Yuan Road No. 38, Beijing, 100191, China
| | - Kai-Meng Liu
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University, Xue Yuan Road No. 38, Beijing, 100191, China
| | - De-Cai Xiong
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University, Xue Yuan Road No. 38, Beijing, 100191, China.,Shandong Key Laboratory of Carbohydrate Chemistry and Glycobiology, Shandong University, 27 Shanda Nanlu, Jinan, Shandong, 250100, China
| | - Hanyu Zhang
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University, Xue Yuan Road No. 38, Beijing, 100191, China
| | - Tian Li
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University, Xue Yuan Road No. 38, Beijing, 100191, China
| | - Bohan Li
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University, Xue Yuan Road No. 38, Beijing, 100191, China
| | - Xianjin Qin
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University, Xue Yuan Road No. 38, Beijing, 100191, China
| | - Jinhe Bai
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University, Xue Yuan Road No. 38, Beijing, 100191, China
| | - Xin-Shan Ye
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University, Xue Yuan Road No. 38, Beijing, 100191, China
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158
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Hansen T, Elferink H, van Hengst JMA, Houthuijs KJ, Remmerswaal WA, Kromm A, Berden G, van der Vorm S, Rijs AM, Overkleeft HS, Filippov DV, Rutjes FPJT, van der Marel GA, Martens J, Oomens J, Codée JDC, Boltje TJ. Characterization of glycosyl dioxolenium ions and their role in glycosylation reactions. Nat Commun 2020; 11:2664. [PMID: 32471982 PMCID: PMC7260182 DOI: 10.1038/s41467-020-16362-x] [Citation(s) in RCA: 73] [Impact Index Per Article: 18.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2019] [Accepted: 04/22/2020] [Indexed: 12/28/2022] Open
Abstract
Controlling the chemical glycosylation reaction remains the major challenge in the synthesis of oligosaccharides. Though 1,2-trans glycosidic linkages can be installed using neighboring group participation, the construction of 1,2-cis linkages is difficult and has no general solution. Long-range participation (LRP) by distal acyl groups may steer the stereoselectivity, but contradictory results have been reported on the role and strength of this stereoelectronic effect. It has been exceedingly difficult to study the bridging dioxolenium ion intermediates because of their high reactivity and fleeting nature. Here we report an integrated approach, using infrared ion spectroscopy, DFT computations, and a systematic series of glycosylation reactions to probe these ions in detail. Our study reveals how distal acyl groups can play a decisive role in shaping the stereochemical outcome of a glycosylation reaction, and opens new avenues to exploit these species in the assembly of oligosaccharides and glycoconjugates to fuel biological research.
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Affiliation(s)
- Thomas Hansen
- Leiden University, Leiden Institute of Chemistry, Einsteinweg 55, 2333 CC, Leiden, The Netherlands
| | - Hidde Elferink
- Radboud University Institute for Molecules and Materials, Heyendaalseweg 135, 6525 AJ, Nijmegen, The Netherlands
| | - Jacob M A van Hengst
- Leiden University, Leiden Institute of Chemistry, Einsteinweg 55, 2333 CC, Leiden, The Netherlands
| | - Kas J Houthuijs
- Radboud University Institute for Molecules and Materials, Heyendaalseweg 135, 6525 AJ, Nijmegen, The Netherlands
| | - Wouter A Remmerswaal
- Leiden University, Leiden Institute of Chemistry, Einsteinweg 55, 2333 CC, Leiden, The Netherlands
| | - Alexandra Kromm
- Radboud University Institute for Molecules and Materials, Heyendaalseweg 135, 6525 AJ, Nijmegen, The Netherlands
| | - Giel Berden
- Radboud University Institute for Molecules and Materials, FELIX Laboratory, Toernooiveld 7-c, 6525 ED, Nijmegen, The Netherlands
| | - Stefan van der Vorm
- Leiden University, Leiden Institute of Chemistry, Einsteinweg 55, 2333 CC, Leiden, The Netherlands
| | - Anouk M Rijs
- Radboud University Institute for Molecules and Materials, FELIX Laboratory, Toernooiveld 7-c, 6525 ED, Nijmegen, The Netherlands
| | - Hermen S Overkleeft
- Leiden University, Leiden Institute of Chemistry, Einsteinweg 55, 2333 CC, Leiden, The Netherlands
| | - Dmitri V Filippov
- Leiden University, Leiden Institute of Chemistry, Einsteinweg 55, 2333 CC, Leiden, The Netherlands
| | - Floris P J T Rutjes
- Radboud University Institute for Molecules and Materials, Heyendaalseweg 135, 6525 AJ, Nijmegen, The Netherlands
| | - Gijsbert A van der Marel
- Leiden University, Leiden Institute of Chemistry, Einsteinweg 55, 2333 CC, Leiden, The Netherlands
| | - Jonathan Martens
- Radboud University Institute for Molecules and Materials, FELIX Laboratory, Toernooiveld 7-c, 6525 ED, Nijmegen, The Netherlands
| | - Jos Oomens
- Radboud University Institute for Molecules and Materials, FELIX Laboratory, Toernooiveld 7-c, 6525 ED, Nijmegen, The Netherlands.
| | - Jeroen D C Codée
- Leiden University, Leiden Institute of Chemistry, Einsteinweg 55, 2333 CC, Leiden, The Netherlands.
| | - Thomas J Boltje
- Radboud University Institute for Molecules and Materials, Heyendaalseweg 135, 6525 AJ, Nijmegen, The Netherlands.
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159
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Canela-Xandri A, Balcells M, Villorbina G, Christou P, Canela-Garayoa R. Preparation and Uses of Chlorinated Glycerol Derivatives. Molecules 2020; 25:E2511. [PMID: 32481583 PMCID: PMC7321119 DOI: 10.3390/molecules25112511] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2020] [Revised: 05/19/2020] [Accepted: 05/25/2020] [Indexed: 11/16/2022] Open
Abstract
Crude glycerol (C3H8O3) is a major by-product of biodiesel production from vegetable oils and animal fats. The increased biodiesel production in the last two decades has forced glycerol production up and prices down. However, crude glycerol from biodiesel production is not of adequate purity for industrial uses, including food, cosmetics and pharmaceuticals. The purification process of crude glycerol to reach the quality standards required by industry is expensive and dificult. Novel uses for crude glycerol can reduce the price of biodiesel and make it an economical alternative to diesel. Moreover, novel uses may improve environmental impact, since crude glycerol disposal is expensive and dificult. Glycerol is a versatile molecule with many potential applications in fermentation processes and synthetic chemistry. It serves as a glucose substitute in microbial growth media and as a precursor in the synthesis of a number of commercial intermediates or fine chemicals. Chlorinated derivatives of glycerol are an important class of such chemicals. The main focus of this review is the conversion of glycerol to chlorinated derivatives, such as epichlorohydrin and chlorohydrins, and their further use in the synthesis of additional downstream products. Downstream products include non-cyclic compounds with allyl, nitrile, azide and other functional groups, as well as oxazolidinones and triazoles, which are cyclic compounds derived from ephichlorohydrin and chlorohydrins. The polymers and ionic liquids, which use glycerol as an initial building block, are highlighted, as well.
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Affiliation(s)
- Anna Canela-Xandri
- Department of Chemistry, University of Lleida-Agrotecnio Centre and DBA center, Av. Alcalde Rovira Roure, 191, 25198 Lleida, Spain; (A.C.-X.); (M.B.); (G.V.)
| | - Mercè Balcells
- Department of Chemistry, University of Lleida-Agrotecnio Centre and DBA center, Av. Alcalde Rovira Roure, 191, 25198 Lleida, Spain; (A.C.-X.); (M.B.); (G.V.)
| | - Gemma Villorbina
- Department of Chemistry, University of Lleida-Agrotecnio Centre and DBA center, Av. Alcalde Rovira Roure, 191, 25198 Lleida, Spain; (A.C.-X.); (M.B.); (G.V.)
| | - Paul Christou
- Department of Crop and Forest Sciences, University of Lleida-Agrotecnio Center, Av. Rovira Roure 191, 25198 Lleida, Spain;
- ICREA, Catalan Institute for Research and Advanced Studies, Passeig Lluıís Companys 23, 08010 Barcelona, Spain
| | - Ramon Canela-Garayoa
- Department of Chemistry, University of Lleida-Agrotecnio Centre and DBA center, Av. Alcalde Rovira Roure, 191, 25198 Lleida, Spain; (A.C.-X.); (M.B.); (G.V.)
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160
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Borbás A. Photoinitiated Thiol-ene Reactions of Enoses: A Powerful Tool for Stereoselective Synthesis of Glycomimetics with Challenging Glycosidic Linkages. Chemistry 2020; 26:6090-6101. [PMID: 31910299 PMCID: PMC7317871 DOI: 10.1002/chem.201905408] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2019] [Revised: 01/03/2020] [Indexed: 12/21/2022]
Abstract
Thioglycosides and C-glycosides represent pharmacologically useful classes of glycomimetics that possess a high degree of biological stability. One emerging tool for the stereoselective synthesis of thioglycosides is the photoinitiated addition of thiols to unsaturated sugars. Moreover, thiyl radical-mediated reactions of exo-glycals and 1-substituted endo-glycals offer facile routes to β-C-glycosidic structures. This Concept article summarizes the thiol-ene coupling strategies developed recently by our group and Somsák's group for the synthesis of several kinds of glycomimetics which are difficult to synthesize by conventional methods. One unusual characteristic of the thiol-ene reactions of endo-glycals is that heating inhibits, whereas cooling promotes the reaction. This unique temperature dependence as well as the effects of the enose structures and thiol configurations on the efficacy and stereoselectivity of the reactions are also discussed.
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Affiliation(s)
- Anikó Borbás
- Department of Pharmaceutical ChemistryUniversity of DebrecenEgyetem tér 14032DebrecenHungary
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161
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Mrudulakumari Vasudevan U, Lee EY. Flavonoids, terpenoids, and polyketide antibiotics: Role of glycosylation and biocatalytic tactics in engineering glycosylation. Biotechnol Adv 2020; 41:107550. [PMID: 32360984 DOI: 10.1016/j.biotechadv.2020.107550] [Citation(s) in RCA: 42] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2020] [Revised: 04/19/2020] [Accepted: 04/24/2020] [Indexed: 02/07/2023]
Abstract
Flavonoids, terpenoids, and polyketides are structurally diverse secondary metabolites used widely as pharmaceuticals and nutraceuticals. Most of these molecules exist in nature as glycosides, in which sugar residues act as a decisive factor in their architectural complexity and bioactivity. Engineering glycosylation through selective trimming or extension of the sugar residues in these molecules is a prerequisite to their commercial production as well to creating novel derivatives with specialized functions. Traditional chemical glycosylation methods are tedious and can offer only limited end-product diversity. New in vitro and in vivo biocatalytic tools have emerged as outstanding platforms for engineering glycosylation in these three classes of secondary metabolites to create a large repertoire of versatile glycoprofiles. As knowledge has increased about secondary metabolite-associated promiscuous glycosyltransferases and sugar biosynthetic machinery, along with phenomenal progress in combinatorial biosynthesis, reliable industrial production of unnatural secondary metabolites has gained momentum in recent years. This review highlights the significant role of sugar residues in naturally occurring flavonoids, terpenoids, and polyketide antibiotics. General biocatalytic tools used to alter the identity and pattern of sugar molecules are described, followed by a detailed illustration of diverse strategies used in the past decade to engineer glycosylation of these valuable metabolites, exemplified with commercialized products and patents. By addressing the challenges involved in current bio catalytic methods and considering the perspectives portrayed in this review, exceptional drugs, flavors, and aromas from these small molecules could come to dominate the natural-product industry.
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Affiliation(s)
| | - Eun Yeol Lee
- Department of Chemical Engineering, Kyung Hee University, Yongin-si, Gyeonggi-do 17104, Republic of Korea.
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162
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Joseph AA, Pardo-Vargas A, Seeberger PH. Total Synthesis of Polysaccharides by Automated Glycan Assembly. J Am Chem Soc 2020; 142:8561-8564. [PMID: 32338884 PMCID: PMC7304863 DOI: 10.1021/jacs.0c00751] [Citation(s) in RCA: 103] [Impact Index Per Article: 25.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
Polysaccharides are the most abundant biopolymers on earth that serve various structural and modulatory functions. Pure, completely defined linear and branched polysaccharides are essential to understand carbohydrate structure and function. Polysaccharide isolation provides heterogeneous mixtures, while heroic efforts were required to complete chemical and/or enzymatic syntheses of polysaccharides as long 92-mers. Here, we show that automated glycan assembly (AGA) enables access to a 100-mer polysaccharide via a 201-step synthesis within 188 h. Convergent block coupling of 30- and 31-mer oligosaccharide fragments, prepared by AGA, yielded a multiple-branched 151-mer polymannoside. Quick access to polysaccharides provides the basis for future material science applications of carbohydrates.
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Affiliation(s)
- A Abragam Joseph
- Department of Biomolecular Systems, Max-Planck-Institute of Colloids and Interfaces, Am Mühlenberg 1, 14476 Potsdam, Germany
| | - Alonso Pardo-Vargas
- Department of Biomolecular Systems, Max-Planck-Institute of Colloids and Interfaces, Am Mühlenberg 1, 14476 Potsdam, Germany.,Freie Universität Berlin, Institute of Chemistry and Biochemistry, Arnimallee 22, 14195 Berlin, Germany
| | - Peter H Seeberger
- Department of Biomolecular Systems, Max-Planck-Institute of Colloids and Interfaces, Am Mühlenberg 1, 14476 Potsdam, Germany.,Freie Universität Berlin, Institute of Chemistry and Biochemistry, Arnimallee 22, 14195 Berlin, Germany
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163
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Meng S, Bhetuwal BR, Nguyen H, Qi X, Fang C, Saybolt K, Li X, Liu P, Zhu J. β-Mannosylation via O-Alkylation of Anomeric Cesium Alkoxides: Mechanistic Studies and Synthesis of the Hexasaccharide Core of Complex Fucosylated N-Linked Glycans. European J Org Chem 2020; 2020:2291-2301. [PMID: 32431565 PMCID: PMC7236807 DOI: 10.1002/ejoc.202000313] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2020] [Indexed: 12/11/2022]
Abstract
A number of structurally diverse D-mannose-derived lactols, including various deoxy-D-mannoses and conformationally restricted bicyclic D-mannoses, have been synthesized and investigated in mechanistic studies of β-mannosylation via Cs2CO3-mediated anomeric O-alkylation. It was found that deoxy mannoses or conformationally restricted bicyclic D-mannoses are not as reactive as their corresponding parent mannose. This type of β-mannosylation proceeds efficiently when the C2-OH is left free, and protection of that leads to inferior results. NMR studies of D-mannose-derived anomeric cesium alkoxides indicated the predominance of the equatorial β-anomer after deprotonation. Reaction progress kinetic analysis suggested that monomeric cesium alkoxides be the key reactive species for alkylation with electrophiles. DFT calculations supported that oxygen atoms at C2, C3, and C6 of mannose promote the deprotonation of the anomeric hydroxyl group by Cs2CO3 and chelating interactions between Cs and these oxygen atoms favour the formation of equatorial anomeric alkoxides, leading to the highly β-selective anomeric O-alkylation. Based on experimental data and computational results, a revised mechanism for this β-mannosylation is proposed. The utilization of this β-mannosylation was demonstrated by an efficient synthesis of the hexasaccharide core of complex fucosylated N-linked glycans.
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Affiliation(s)
- Shuai Meng
- Department of Chemistry and Biochemistry and School of Green Chemistry and Engineering, The University of Toledo, 2801 W. Bancroft Street, Toledo, Ohio 43606, United States
| | - Bishwa Raj Bhetuwal
- Department of Chemistry and Biochemistry and School of Green Chemistry and Engineering, The University of Toledo, 2801 W. Bancroft Street, Toledo, Ohio 43606, United States
| | - Hai Nguyen
- Department of Chemistry and Biochemistry and School of Green Chemistry and Engineering, The University of Toledo, 2801 W. Bancroft Street, Toledo, Ohio 43606, United States
| | - Xiaotian Qi
- Department of Chemistry, University of Pittsburgh, 219 Parkman Avenue, Pittsburgh, Pennsylvania 15260, United States
| | - Cheng Fang
- Department of Chemistry, University of Pittsburgh, 219 Parkman Avenue, Pittsburgh, Pennsylvania 15260, United States
| | - Kevin Saybolt
- Department of Natural Sciences, University of Michigan‒Dearborn, 4901 Evergreen Road, Dearborn, Michigan 48128, United States
| | - Xiaohua Li
- Department of Natural Sciences, University of Michigan‒Dearborn, 4901 Evergreen Road, Dearborn, Michigan 48128, United States
| | - Peng Liu
- Department of Chemistry, University of Pittsburgh, 219 Parkman Avenue, Pittsburgh, Pennsylvania 15260, United States
- Department of Chemical and Petroleum Engineering, University of Pittsburgh, 3700 O'Hara Street, Pittsburgh, Pennsylvania 15261, United States
| | - Jianglong Zhu
- Department of Chemistry and Biochemistry and School of Green Chemistry and Engineering, The University of Toledo, 2801 W. Bancroft Street, Toledo, Ohio 43606, United States
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164
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Ding F, Ishiwata A, Zhou S, Zhong X, Ito Y. Unified Strategy toward Stereocontrolled Assembly of Various Glucans Based on Bimodal Glycosyl Donors. J Org Chem 2020; 85:5536-5558. [PMID: 32212661 DOI: 10.1021/acs.joc.0c00292] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Polymers of glucose, the most abundant and one of the biologically important natural products, named glucans are widely present in fungi, bacteria, mammals, and plants with various anomeric configurations and glycosidic linkages. Because of their structural diversity, the unified strategy for the assembly of pure glucans is yet to be developed. Herein, we describe a general strategy that is applicable to construction of all types of glucans by exploiting a bimodal glycosyl donor equipped with C2-o-TsNHbenzyl ether (TAB), which enables stereocontrolled synthesis of both α- and β-glycosides by switching reaction conditions.
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Affiliation(s)
- Feiqing Ding
- School of Pharmaceutical Sciences (Shenzhen), Sun Yat-sen University, Guangzhou 510275, China.,Synthetic Cellular Chemistry Laboratory, RIKEN, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - Akihiro Ishiwata
- Synthetic Cellular Chemistry Laboratory, RIKEN, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - Siai Zhou
- School of Pharmaceutical Sciences (Shenzhen), Sun Yat-sen University, Guangzhou 510275, China
| | - Xuemei Zhong
- School of Pharmaceutical Sciences (Shenzhen), Sun Yat-sen University, Guangzhou 510275, China
| | - Yukishige Ito
- Synthetic Cellular Chemistry Laboratory, RIKEN, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan.,Graduate School of Science, Osaka University, Toyonaka, Osaka 560-0043, Japan
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165
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Azidophenylselenylation of glycals towards 2-azido-2-deoxy-selenoglycosides and their application in oligosaccharide synthesis. PURE APPL CHEM 2020. [DOI: 10.1515/pac-2020-0105] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
Abstract
2-Amino-2-deoxy-pyranosyl units are important structural components of cell-wall polymers in prokaryotes, fungi and mammals. With respect to the need for development of novel and efficient vaccines and tools for serodiagnosis of infectious diseases, of particular interest are the oligosaccharide cell-wall antigens of pathogenic bacteria and fungi, which comprise 2-amino-2-deoxy-D-glucopyranose and 2-amino-2-deoxy-D-galactopyranose units as α- or β-anomers. Synthesis of N-acylated α-GlcN and α-GalN containing oligosaccharides is a special challenge due to the presence of a participating group at C2 which favors the formation of β- rather than α-glycoside bond. Herein we overview the efficient two-step approach for preparation of 1,2-cis-glycosides of 2-amino-2-deoxy-D-glucopyranose and 2-amino-2-deoxy-D-galactopyranose, which was recently developed in our laboratory. In the first step, an efficient and straightforward azidophenylselenylation procedure of glycals gives phenyl 2-azido-2-deoxy-1-selenoglycosides as versatile glycosyl donors. In the second step, these donors can be efficiently transformed into α- or β-glycosides depending on the choice of the solvent. In acetonitrile, total β-stereocontrol was achieved, and the use of diethyl ether as a solvent favouring α-stereoselectivity of glycosylations with phenyl 2-azido-2-deoxy-1-selenoglycosides. Besides, it was shown, that low reactivity and nucleophilicity of glycosyl acceptors which are glycosylated with phenyl 2-azido-2-deoxy-1-selenogalactosides facilitated the formation of α-GalN derivatives. To date, homogenous azidophenylselenylation of glycals and glycosylation with phenyl 2-azido-2-deoxy-1-seleno-α-D-glycopyranosides can be regarded as most useful tool for introduction of 2-amino-2-deoxy-D-glycopyranoside residues into complex synthetic oligosaccharides.
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166
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Meng S, Zhong W, Yao W, Li Z. Stereoselective Phenylselenoglycosylation of Glycals Bearing a Fused Carbonate Moiety toward the Synthesis of 2-Deoxy-β-galactosides and β-Mannosides. Org Lett 2020; 22:2981-2986. [PMID: 32216320 DOI: 10.1021/acs.orglett.0c00732] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
A phenylselenoglycosylation reaction of glycal derivatives mediated by diphenyl diselenide and phenyliodine(III) bis(trifluoroacetate) under mild conditions is described. Stereoselective glycosylation has been achieved by installing fused carbonate on those glycals. 3,4-O-Carbonate galactals and 2,3-O-carbonate 2-hydroxyglucals are converted into corresponding glycosides in good yields with excellent β-selectivity, resulting in 2-phenylseleno-2-deoxy-β-galactosides and 2-phenylseleno-β-mannosides which are good precursors of 2-deoxy-β-galactosides and β-mannosides, respectively.
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Affiliation(s)
- Shuai Meng
- State Key Laboratory of Natural and Biomimetic Drugs, Department of Chemical Biology, School of Pharmaceutical Sciences, Peking University, Beijing 100191, P.R. China
| | - Wenhe Zhong
- State Key Laboratory of Natural and Biomimetic Drugs, Department of Chemical Biology, School of Pharmaceutical Sciences, Peking University, Beijing 100191, P.R. China
| | - Wang Yao
- State Key Laboratory of Natural and Biomimetic Drugs, Department of Chemical Biology, School of Pharmaceutical Sciences, Peking University, Beijing 100191, P.R. China
| | - Zhongjun Li
- State Key Laboratory of Natural and Biomimetic Drugs, Department of Chemical Biology, School of Pharmaceutical Sciences, Peking University, Beijing 100191, P.R. China
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167
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Xiao X, Zeng J, Fang J, Sun J, Li T, Song Z, Cai L, Wan Q. One-Pot Relay Glycosylation. J Am Chem Soc 2020; 142:5498-5503. [PMID: 32150398 DOI: 10.1021/jacs.0c00447] [Citation(s) in RCA: 45] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
A novel one-pot relay glycosylation has been established. The protocol is characterized by the construction of two glycosidic bonds with only one equivalent of triflic anhydride. This method capitalizes on the in situ generated cyclic-thiosulfonium ion as the relay activator, which directly activates the newly formed thioglycoside in one pot. A wide range of substrates are well-accommodated to furnish both linear and branched oligosaccharides. The synthetic utility and advantage of this method have been demonstrated by rapid access to naturally occurring phenylethanoid glycoside kankanoside F and resin glycoside merremoside D.
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Affiliation(s)
- Xiong Xiao
- Hubei Key Laboratory of Natural Medicinal Chemistry and Resource Evaluation, School of Pharmacy, Huazhong University of Science and Technology, 13 Hangkong Road, Wuhan, Hubei 430030, People's Republic of China
| | - Jing Zeng
- Hubei Key Laboratory of Natural Medicinal Chemistry and Resource Evaluation, School of Pharmacy, Huazhong University of Science and Technology, 13 Hangkong Road, Wuhan, Hubei 430030, People's Republic of China
| | - Jing Fang
- Hubei Key Laboratory of Natural Medicinal Chemistry and Resource Evaluation, School of Pharmacy, Huazhong University of Science and Technology, 13 Hangkong Road, Wuhan, Hubei 430030, People's Republic of China
| | - Jiuchang Sun
- Hubei Key Laboratory of Natural Medicinal Chemistry and Resource Evaluation, School of Pharmacy, Huazhong University of Science and Technology, 13 Hangkong Road, Wuhan, Hubei 430030, People's Republic of China
| | - Ting Li
- Hubei Key Laboratory of Natural Medicinal Chemistry and Resource Evaluation, School of Pharmacy, Huazhong University of Science and Technology, 13 Hangkong Road, Wuhan, Hubei 430030, People's Republic of China
| | - Zejin Song
- Hubei Key Laboratory of Natural Medicinal Chemistry and Resource Evaluation, School of Pharmacy, Huazhong University of Science and Technology, 13 Hangkong Road, Wuhan, Hubei 430030, People's Republic of China
| | - Lei Cai
- Hubei Key Laboratory of Natural Medicinal Chemistry and Resource Evaluation, School of Pharmacy, Huazhong University of Science and Technology, 13 Hangkong Road, Wuhan, Hubei 430030, People's Republic of China
| | - Qian Wan
- Hubei Key Laboratory of Natural Medicinal Chemistry and Resource Evaluation, School of Pharmacy, Huazhong University of Science and Technology, 13 Hangkong Road, Wuhan, Hubei 430030, People's Republic of China.,Institute of Brain Research, Huazhong University of Science and Technology, 13 Hangkong Road, Wuhan, Hubei 430030, People's Republic of China
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168
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Uriel C, Permingeat C, Ventura J, Avellanal-Zaballa E, Bañuelos J, García-Moreno I, Gómez AM, Lopez JC. BODIPYs as Chemically Stable Fluorescent Tags for Synthetic Glycosylation Strategies towards Fluorescently Labeled Saccharides. Chemistry 2020; 26:5388-5399. [PMID: 31999023 DOI: 10.1002/chem.201905780] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2019] [Indexed: 12/11/2022]
Abstract
A series of fluorescent boron-dipyrromethene (BODIPY, 4,4-difluoro-4-bora-3a,4a-diaza-s-indacene) dyes have been designed to participate, as aglycons, in synthetic oligosaccharide protocols. As such, they served a dual purpose: first, by being incorporated at the beginning of the process (at the reducing-end of the growing saccharide moiety), they can function as fluorescent glycosyl tags, facilitating the detection and purification of the desired glycosidic intermediates, and secondly, the presence of these chromophores on the ensuing compounds grants access to fluorescently labeled saccharides. In this context, a sought-after feature of the fluorescent dyes has been their chemical robustness. Accordingly, some BODIPY derivatives described in this work can withstand the reaction conditions commonly employed in the chemical synthesis of saccharides; namely, glycosylation and protecting-group manipulations. Regarding their photophysical properties, the BODIPY-labeled saccharides obtained in this work display remarkable fluorescence efficiency in water, reaching quantum yield values up to 82 %, as well as notable lasing efficiencies and photostabilities.
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Affiliation(s)
- Clara Uriel
- Instituto de Química Organica General (IQOG-CSIC), Juan de la Cierva 3, 28006, Madrid, Spain
| | - Caterina Permingeat
- Instituto de Química Organica General (IQOG-CSIC), Juan de la Cierva 3, 28006, Madrid, Spain
| | - Juan Ventura
- Instituto de Química Organica General (IQOG-CSIC), Juan de la Cierva 3, 28006, Madrid, Spain
| | | | - Jorge Bañuelos
- Dpto. Química Física, Universidad del País Vasco (UPV/EHU), Aptdo. 644, 48080, Bilbao, Spain
| | | | - Ana M Gómez
- Instituto de Química Organica General (IQOG-CSIC), Juan de la Cierva 3, 28006, Madrid, Spain
| | - J Cristobal Lopez
- Instituto de Química Organica General (IQOG-CSIC), Juan de la Cierva 3, 28006, Madrid, Spain
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169
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Fan Y, Fu F, Chen L, Li J, Zhang J. Surface Activity of Alkoxy Ethoxyethyl β-d-Glucopyranosides. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2020; 68:2684-2695. [PMID: 32083874 DOI: 10.1021/acs.jafc.9b05966] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Dioxyethene fragment (-(OCH2CH2)2-) was introduced into traditional alkyl β-d-glucopyranosides to ameliorate the water solubility, and eight nonionic surfactants, that is, alkoxy ethoxyethyl β-d-glucopyranosides with alkyl chain lengths (n = 6-16), were synthesized and characterized. Their hydrophilic and lipophilic balance number, water solubility, critical micelle concentration (cmc), γcmc, Γmax, and hygroscopic rate decreased with an increase in the alkyl chain length. Hexadecoxy ethoxyethyl β-d-glucopyranoside had no water solubility at 25 °C. Decoxy ethoxyethyl β-d-glucopyranoside had the best emulsifying property in the toluene/water and n-octane/water systems and the strongest foaming property, whereas dodecoxy ethoxyethyl β-d-glucopyranoside had the best emulsifying property in the rapeseed oil/water system. Such β-d-glucopyranosides (n = 6-12) exhibited excellent surface activity. In addition, for the binary mixture of alkoxy ethoxyethyl β-d-glucopyranosides (n = 8, 10, 12) and sodium dodecyl sulfate or cetyl trimethyl ammonium chloride, their cmc values were lower than the pure β-d-glucopyranosides, indicating that they had synergistic interactions. The fan focal conic textures of alkoxy ethoxyethyl β-d-glucopyranosides (n = 7-16) were observed during the cooling process under a polarizing optical microscope. Alkoxy ethoxyethyl β-d-glucopyranosides (n = 14, 16) had the related melting points and the clear points with differential scanning calorimetry. With β-d-glucopyranosides (n = 6-16) and n-butanol as the surfactant and cosurfactant, respectively, and with cyclohexane as the oil phase, the related microemulsion areas in their pseudoternary phase diagram system were investigated with the visual observation at 25 °C. Along with the slashing requirements of petroleum consumption, environmental protection, and green and sustainable development, nonionic sugar-based alkoxy ethoxyethyl β-d-glucopyranosides should be expected to have their potential practical application because of their strengthened hydrophilicity, improved water solubility, and enhanced surface activity.
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Affiliation(s)
- Yulin Fan
- Key Laboratory of Environmentally Friendly Chemistry and Application of Ministry of Education, College of Chemistry, Xiangtan University, Xiangtan, Hunan 411105, People's Republic of China
| | - Fang Fu
- Key Laboratory of Environmentally Friendly Chemistry and Application of Ministry of Education, College of Chemistry, Xiangtan University, Xiangtan, Hunan 411105, People's Republic of China
| | - Langqiu Chen
- Key Laboratory of Environmentally Friendly Chemistry and Application of Ministry of Education, College of Chemistry, Xiangtan University, Xiangtan, Hunan 411105, People's Republic of China
| | - Jiping Li
- Key Laboratory of Environmentally Friendly Chemistry and Application of Ministry of Education, College of Chemistry, Xiangtan University, Xiangtan, Hunan 411105, People's Republic of China
| | - Jing Zhang
- Key Laboratory of Environmentally Friendly Chemistry and Application of Ministry of Education, College of Chemistry, Xiangtan University, Xiangtan, Hunan 411105, People's Republic of China
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170
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Bachmann T, Rychlik M. Chemical glucosylation of pyridoxine. Carbohydr Res 2020; 489:107929. [DOI: 10.1016/j.carres.2020.107929] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2019] [Revised: 01/27/2020] [Accepted: 01/27/2020] [Indexed: 11/28/2022]
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171
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Synthesis of 3-S- and 3-Se-glycals by using R-S-S-R and R-Se-Se-R as the nucleophile precursors promoted by Hf(OTf)4 and the temperature-dependent formation of the above-mentioned 3-S- and 3-Se products. Tetrahedron Lett 2020. [DOI: 10.1016/j.tetlet.2020.151648] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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172
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Dvores MP, Çarçabal P, Maître P, Simons JP, Gerber RB. Gas phase dynamics, conformational transitions and spectroscopy of charged saccharides: the oxocarbenium ion, protonated anhydrogalactose and protonated methyl galactopyranoside. Phys Chem Chem Phys 2020; 22:4144-4157. [PMID: 32039431 DOI: 10.1039/c9cp06572e] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Protonated intermediates are postulated to be involved in the rate determining step of many sugar reactions. This paper presents a study of protonated sugar species, isolated in the gas phase, using a combination of infrared multiple photon dissociation (IRMPD) spectroscopy, classical ab initio molecular dynamics (AIMD) and quantum mechanical vibrational self-consistent field (VSCF) calculations. It provides a likely identification of the reactive intermediate oxocarbenium ion structure in a d-galactosyl system as well as the saccharide pyrolysis product anhydrogalactose (that suggests oxocarbenium ion stabilization), along with the spectrum of the protonated parent species: methyl d-galactopyranoside-H+. Its vibrational fingerprint indicates intramolecular proton sharing. Classical AIMD simulations for galactosyl oxocarbenium ions, conducted in the temperature range ∼300-350 K (using B3LYP potentials on-the-fly) reveal efficient transitions on the picosecond timescale. Multiple conformers are likely to exist under the experimental conditions and along with static VSCF calculations, they have facilitated the identification of the individual structural motifs of the galactosyl oxocarbenium ion and protonated anhydrogalactose ion conformers that contribute to the observed experimental spectra. These results demonstrate the power of experimental IRMPD spectroscopy combined with dynamics simulations and with computational spectroscopy at the anharmonic level to unravel conformer structures of protonated saccharides, and to provide information on their lifetimes.
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Affiliation(s)
- M P Dvores
- Institute of Chemistry and the Fritz Haber Research Center, The Hebrew University, Jerusalem 91904, Israel.
| | - P Çarçabal
- Université Paris-Saclay, CNRS, Institut des Sciences Moléculaires d'Orsay, 91405, Orsay, France
| | - P Maître
- Université Paris-Saclay, CNRS, Institut de Chimie Physique, 91405, Orsay, France
| | - J P Simons
- Department of Chemistry, Physical and Theoretical Chemistry Laboratory, Oxford University, South Parks Road, Oxford OX1 3QZ, UK
| | - R B Gerber
- Institute of Chemistry and the Fritz Haber Research Center, The Hebrew University, Jerusalem 91904, Israel. and Department of Chemistry, University of California Irvine, CA 92697, USA
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173
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de Kleijne FFJ, Moons SJ, White PB, Boltje TJ. C-2 auxiliaries for stereoselective glycosylation based on common additive functional groups. Org Biomol Chem 2020; 18:1165-1184. [PMID: 31984407 DOI: 10.1039/c9ob02700a] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The stereoselective introduction of the glycosidic bond is one of the main challenges in chemical oligosaccharide synthesis. Stereoselective glycosylation can be achieved using neighbouring group participation of a C-2 auxiliary or using additives, for example. Both methods aim to generate a defined reactive intermediate that reacts in a stereoselective manner with alcohol nucleophiles. This inspired us to develop new C-2 auxiliaries based on commonly used additive functionalities such as ethers, phosphine oxides and tertiary amides. Good 1,2-trans-selectivity was observed for the phosphine oxide and amide-based auxiliaries expanding the toolbox with new auxiliaries for stereoselective glycosylation reactions.
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Affiliation(s)
| | - Sam J Moons
- Institute for molecules and materials, Nijmegen, 6525AJ, Netherlands.
| | - Paul B White
- Institute for molecules and materials, Nijmegen, 6525AJ, Netherlands.
| | - Thomas J Boltje
- Institute for molecules and materials, Nijmegen, 6525AJ, Netherlands.
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174
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Gao H, Liang D, Li C, Xu G, Jiang M, Li H, Yin J, Song Y. 2-Deoxy-Rh2: A novel ginsenoside derivative, as dual-targeting anti-cancer agent via regulating apoptosis and glycolysis. Biomed Pharmacother 2020; 124:109891. [PMID: 31991384 DOI: 10.1016/j.biopha.2020.109891] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2019] [Revised: 01/06/2020] [Accepted: 01/13/2020] [Indexed: 12/28/2022] Open
Abstract
20(S)-Rh2 is a ginsenoside isolated from Panax ginseng, which exhibits anti-cancer activities on various human cancer cells. A novel 20(S)-Rh2 derivative, 2-Deoxy-Rh2 was synthesized and hybridized with protopanaxadiol and 2-deoxy-glucose in an attempt to enhance the anticancer activity. Through screening the antitumor effect against various cell lines by MTT assay, 2-Deoxy-Rh2 especially resulted in a concentration-dependent and time-dependent inhibition of viability in MCF-7 human breast cancer cells. Multiple methods were used to explore the cellular and molecular mechanisms of 2-Deoxy-Rh2 as a potent anti-cancer agent. In MCF-7 cells, 2-Deoxy-Rh2 triggered apoptosis, stimulated ROS production and disrupted normal mitochondrial membrane potential. Meantime, 2-Deoxy-Rh2 eff ;ectively suppressed the glucose uptake capabilities and intracellular ATP production. The cellular oxygen consumption rate (OCR) and extracellular acidification rate (ECAR) were significantly decreased in response to 2-Deoxy-Rh2, which were carried out to assess the overall glycolytic flux and mitochondrial respiration. Docking studies and molecular dynamics simulations were performed to verify the binding mode of 2-DG and 2-Deoxy-Rh2 with hexokinase II, with results showing that 2-Deoxy-Rh2 could easily fit into the similar active site of 2-DG, finally binding to hexokinase II to suppress glycolysis. Taken together, the results suggest that 2-Deoxy-Rh2 exhibited remarkable anticancer activity based on regulating mitochondrial apoptosis pathway, dampening glycolysis and inhibiting mitochondrial respiration, which support development of 2-Deoxy-Rh2 as a potential agent for cancer therapy.
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Affiliation(s)
- Huan Gao
- Department of Pharmacy, The First Hospital of Jilin University, Changchun, Jilin, 130021, PR China; School of Pharmaceutical Sciences, Jilin University, Changchun, Jilin, 130021, PR China
| | - Di Liang
- School of Pharmaceutical Sciences, Jilin University, Changchun, Jilin, 130021, PR China
| | - Chenchen Li
- School of Pharmaceutical Sciences, Jilin University, Changchun, Jilin, 130021, PR China
| | - Guoxing Xu
- School of Pharmaceutical Sciences, Jilin University, Changchun, Jilin, 130021, PR China
| | - Mengnan Jiang
- School of Pharmaceutical Sciences, Jilin University, Changchun, Jilin, 130021, PR China
| | - Heng Li
- School of Pharmaceutical Sciences, Jilin University, Changchun, Jilin, 130021, PR China
| | - Jianyuan Yin
- School of Pharmaceutical Sciences, Jilin University, Changchun, Jilin, 130021, PR China.
| | - Yanqing Song
- Department of Pharmacy, The First Hospital of Jilin University, Changchun, Jilin, 130021, PR China.
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175
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Han F, Xiao Y, Lee IS. Microbial Transformation of Prenylquercetins by Mucor hiemalis. Molecules 2020; 25:molecules25030528. [PMID: 31991807 PMCID: PMC7037548 DOI: 10.3390/molecules25030528] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2019] [Revised: 01/23/2020] [Accepted: 01/23/2020] [Indexed: 01/26/2023] Open
Abstract
Quercetin, one of the most widely distributed flavonoids, has been found to show various biological activities including antioxidant, anticancer, and anti-inflammatory effects. It has been reported that bioactivity enhancement of flavonoids has often been closely associated with nuclear prenylation, as shown in 8-prenylquercetin and 5'-prenylquercetin. It has also been revealed in many studies that the biological activities of flavonoids could be improved after glucosylation. Three prenylated quercetins were prepared in this study, and microbial transformation was carried out in order to identify derivatives of prenylquercetins with increased water solubility and improved bioavailability. The fungus M. hiemalis was proved to be capable of converting prenylquercetins into more polar metabolites and was selected for preparative fermentation. Six novel glucosylated metabolites were obtained and their chemical structures were elucidated by NMR and mass spectrometric analyses. All the microbial metabolites showed improvement in water solubility.
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176
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Wen GE, Qiao Z, Liu H, Zeng ZY, Tu YH, Xia JH, Zhang QJ, Sun JS. The first total synthesis of rebaudioside R. Org Biomol Chem 2020; 18:108-126. [DOI: 10.1039/c9ob02422k] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The first total synthesis of rebaudioside R has been achieved via two different approaches.
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Affiliation(s)
- Guo-En Wen
- National Research Centre for Carbohydrate Synthesis
- Jiangxi Normal University
- Nanchang 330022
- China
| | - Zhi Qiao
- National Research Centre for Carbohydrate Synthesis
- Jiangxi Normal University
- Nanchang 330022
- China
| | - Hui Liu
- National Research Centre for Carbohydrate Synthesis
- Jiangxi Normal University
- Nanchang 330022
- China
| | - Zhi-Yong Zeng
- National Research Centre for Carbohydrate Synthesis
- Jiangxi Normal University
- Nanchang 330022
- China
| | - Yuan-Hong Tu
- National Research Centre for Carbohydrate Synthesis
- Jiangxi Normal University
- Nanchang 330022
- China
| | - Jian-Hui Xia
- National Research Centre for Carbohydrate Synthesis
- Jiangxi Normal University
- Nanchang 330022
- China
| | - Qing-Ju Zhang
- National Research Centre for Carbohydrate Synthesis
- Jiangxi Normal University
- Nanchang 330022
- China
| | - Jian-Song Sun
- National Research Centre for Carbohydrate Synthesis
- Jiangxi Normal University
- Nanchang 330022
- China
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177
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Zhao Q, Zhang H, Zhang Y, Zhou S, Gao J. Stereoselective synthesis of a branched α-decaglucan. Org Biomol Chem 2020; 18:6549-6557. [PMID: 32789329 DOI: 10.1039/d0ob01402h] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
The first and convergent synthesis of a branched Arca subcrenata Lischke α-decaglucan containing all of the α-(1 → 3), α-(1 → 4), and α-(1 → 6) glycosyl linkages was efficiently achieved. The tri- and tetrasaccharide fragments and fully protected decasaccharide were assembled in a one-pot manner with excellent α-stereoselectivity, which was secured by the synergistic α-directing effects of the TolSCl/AgOTf catalysis system and the remote participation effect or steric β-shielding of functionalized groups at the donor 6-O-position. Low substrate concentration was revealed to favor the α-stereochemical outcome of glycosylations between bulkier building blocks. The synthetic approach established here would be very useful for the preparation of more complex α-glucans containing different types of glycosidic linkages and branched architectures.
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Affiliation(s)
- Qingpeng Zhao
- National Glycoengineering Research Center, Shandong Key Laboratory of Carbohydrate Chemistry and Glycobiology, Shandong University, Qingdao, Shandong 266237, China.
| | - Han Zhang
- National Glycoengineering Research Center, Shandong Key Laboratory of Carbohydrate Chemistry and Glycobiology, Shandong University, Qingdao, Shandong 266237, China.
| | - Yanxin Zhang
- National Glycoengineering Research Center, Shandong Key Laboratory of Carbohydrate Chemistry and Glycobiology, Shandong University, Qingdao, Shandong 266237, China.
| | - Shihao Zhou
- National Glycoengineering Research Center, Shandong Key Laboratory of Carbohydrate Chemistry and Glycobiology, Shandong University, Qingdao, Shandong 266237, China.
| | - Jian Gao
- National Glycoengineering Research Center, Shandong Key Laboratory of Carbohydrate Chemistry and Glycobiology, Shandong University, Qingdao, Shandong 266237, China.
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178
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Del Vigo EA, Stortz CA, Marino C. Regioselectivity of glycosylation reactions of galactose acceptors: an experimental and theoretical study. Beilstein J Org Chem 2019; 15:2982-2989. [PMID: 31921370 PMCID: PMC6941450 DOI: 10.3762/bjoc.15.294] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2019] [Accepted: 12/06/2019] [Indexed: 11/23/2022] Open
Abstract
Regioselective glycosylations allow planning simpler strategies for the synthesis of oligosaccharides, and thus reducing the need of using protecting groups. With the idea of gaining further understanding of such regioselectivity, we analyzed the relative reactivity of the OH-3 and OH-4 groups of 2,6-diprotected methyl α- and β-galactopyranoside derivatives in glycosylation reactions. The glycosyl acceptors were efficiently prepared by simple methodologies, and glycosyl donors with different reactivities were assessed. High regioselectivities were achieved in favor of the 1→3 products due to the equatorial orientation of the OH-3 group. A molecular modeling approach endorsed this general trend of favoring O-3 substitution, although it showed some failures to explain subtler factors governing the difference in regioselectivity between some of the acceptors. However, the Galp-(β1→3)-Galp linkage could be regioselectively installed by using some of the acceptors assayed herein.
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Affiliation(s)
- Enrique A Del Vigo
- Universidad de Buenos Aires, Facultad de Ciencias Exactas y Naturales, Consejo Nacional de Investigaciones Científicas y Técnicas, Centro de Investigaciones en Hidratos de Carbono (CIHIDECAR), Departamento de Química Orgánica, Pab. 2, Ciudad Universitaria, 1428 Buenos Aires, Argentina
| | - Carlos A Stortz
- Universidad de Buenos Aires, Facultad de Ciencias Exactas y Naturales, Consejo Nacional de Investigaciones Científicas y Técnicas, Centro de Investigaciones en Hidratos de Carbono (CIHIDECAR), Departamento de Química Orgánica, Pab. 2, Ciudad Universitaria, 1428 Buenos Aires, Argentina
| | - Carla Marino
- Universidad de Buenos Aires, Facultad de Ciencias Exactas y Naturales, Consejo Nacional de Investigaciones Científicas y Técnicas, Centro de Investigaciones en Hidratos de Carbono (CIHIDECAR), Departamento de Química Orgánica, Pab. 2, Ciudad Universitaria, 1428 Buenos Aires, Argentina
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179
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Son SH, Byun Y, Sakairi N. Selection of Neighboring Group Participation Intermediates of Fully Acylated Donors around the Glycosylation Sites in Oligosaccharide Acceptors. Org Lett 2019; 21:9368-9371. [PMID: 31710504 DOI: 10.1021/acs.orglett.9b03601] [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
Stereo- and regioselective formation of glycosidic linkages is a challenging topic in oligosaccharide syntheses. The stereoselective construction of 1,2-trans-glycosides generally involves neighboring group participation, which is less successful when synthesizing β-1,3-linked oligosaccharides. The combined steric effect of a 2-O-substituent and an aglycon moiety in acceptors increases the efficiency of glycosylation via neighboring group participation. This steric effect was reduced by using vicinal polyol acceptors and was demonstrated in the synthesis of 1,3-linked branched oligosaccharides.
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Affiliation(s)
- Sang-Hyun Son
- Division of Environment Materials Science , Graduate School of Environmental Science, Hokkaido University , Kita-ku, Sapporo 060-0810 , Japan.,College of Pharmacy , Korea University , 2511 Sejong-ro, Jochiwon-eup , Sejong 30019 , Republic of Korea
| | - Youngjoo Byun
- College of Pharmacy , Korea University , 2511 Sejong-ro, Jochiwon-eup , Sejong 30019 , Republic of Korea
| | - Nobuo Sakairi
- Division of Environment Materials Science , Graduate School of Environmental Science, Hokkaido University , Kita-ku, Sapporo 060-0810 , Japan
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180
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Kundu M, Misra AK. Selective acetolysis of primary benzyl groups in carbohydrate derivatives under the mild reaction condition. Carbohydr Res 2019; 486:107830. [PMID: 31627048 DOI: 10.1016/j.carres.2019.107830] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2019] [Revised: 09/26/2019] [Accepted: 10/02/2019] [Indexed: 11/27/2022]
Abstract
Selective acetolysis of the primary benzyloxy groups in a wide variety of carbohydrate derivatives was achieved in excellent yield using acetic anhydride and perchloric acid supported over silica (HClO4-SiO2) as a solid acid catalyst in a fast reaction condition without using any organic solvent. The reaction condition is significantly rapid and can be scaled up for its use in the multi-step oligosaccharide synthesis.
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Affiliation(s)
- Monalisa Kundu
- Bose Institute, Division of Molecular Medicine, P-1/12, C.I.T. Scheme VII-M, Kolkata, 700054, India
| | - Anup Kumar Misra
- Bose Institute, Division of Molecular Medicine, P-1/12, C.I.T. Scheme VII-M, Kolkata, 700054, India.
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181
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Sordon S, Popłoński J, Tronina T, Huszcza E. Regioselective O-glycosylation of flavonoids by fungi Beauveria bassiana, Absidia coerulea and Absidia glauca. Bioorg Chem 2019; 93:102750. [DOI: 10.1016/j.bioorg.2019.01.046] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2018] [Revised: 01/11/2019] [Accepted: 01/18/2019] [Indexed: 01/02/2023]
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182
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Cai L, Zeng J, Li T, Xiao Y, Ma X, Xiao X, Zhang Q, Meng L, Wan Q. Dehydrative Glycosylation Enabled by a Comproportionation Reaction of 2‐Aryl‐1,3‐dithiane 1‐Oxide
†. CHINESE J CHEM 2019. [DOI: 10.1002/cjoc.201900419] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Lei Cai
- Hubei Key Laboratory of Natural Medicinal Chemistry and Resource Evaluation, School of PharmacyHuazhong University of Science and Technology, 13 Hangkong Road Wuhan Hubei 430030 China
| | - Jing Zeng
- Hubei Key Laboratory of Natural Medicinal Chemistry and Resource Evaluation, School of PharmacyHuazhong University of Science and Technology, 13 Hangkong Road Wuhan Hubei 430030 China
| | - Ting Li
- Hubei Key Laboratory of Natural Medicinal Chemistry and Resource Evaluation, School of PharmacyHuazhong University of Science and Technology, 13 Hangkong Road Wuhan Hubei 430030 China
| | - Ying Xiao
- Hubei Key Laboratory of Natural Medicinal Chemistry and Resource Evaluation, School of PharmacyHuazhong University of Science and Technology, 13 Hangkong Road Wuhan Hubei 430030 China
| | - Xiang Ma
- Hubei Key Laboratory of Natural Medicinal Chemistry and Resource Evaluation, School of PharmacyHuazhong University of Science and Technology, 13 Hangkong Road Wuhan Hubei 430030 China
| | - Xiong Xiao
- Hubei Key Laboratory of Natural Medicinal Chemistry and Resource Evaluation, School of PharmacyHuazhong University of Science and Technology, 13 Hangkong Road Wuhan Hubei 430030 China
| | - Qin Zhang
- Hubei Key Laboratory of Natural Medicinal Chemistry and Resource Evaluation, School of PharmacyHuazhong University of Science and Technology, 13 Hangkong Road Wuhan Hubei 430030 China
| | - Lingkui Meng
- Hubei Key Laboratory of Natural Medicinal Chemistry and Resource Evaluation, School of PharmacyHuazhong University of Science and Technology, 13 Hangkong Road Wuhan Hubei 430030 China
| | - Qian Wan
- Hubei Key Laboratory of Natural Medicinal Chemistry and Resource Evaluation, School of PharmacyHuazhong University of Science and Technology, 13 Hangkong Road Wuhan Hubei 430030 China
- Institute of Brain Research, Huazhong University of Science and Technology, 13 Hangkong Road Wuhan Hubei 430030 China
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183
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Li X, Li C, Liu R, Wang J, Wang Z, Chen Y, Yang Y. Gold(I)-Catalyzed Glycosylation with Glycosyl Ynenoates as Donors. Org Lett 2019; 21:9693-9698. [DOI: 10.1021/acs.orglett.9b03851] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Xiaona Li
- Shanghai Key Laboratory of New Drug Design, School of Pharmacy, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, China
| | - Chenyu Li
- Shanghai Key Laboratory of New Drug Design, School of Pharmacy, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, China
| | - Rongkun Liu
- Shanghai Key Laboratory of New Drug Design, School of Pharmacy, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, China
| | - Jiazhe Wang
- Shanghai Key Laboratory of New Drug Design, School of Pharmacy, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, China
| | - Zixuan Wang
- Shanghai Key Laboratory of New Drug Design, School of Pharmacy, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, China
| | - Yan Chen
- Shanghai Key Laboratory of New Drug Design, School of Pharmacy, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, China
| | - You Yang
- Shanghai Key Laboratory of New Drug Design, School of Pharmacy, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, China
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184
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Hemiketal‐Keto Tautomerism in 2‐Deoxy‐δ‐lactones Mediated by 2‐Lithiothiazole in Solution State: A Formal Synthesis of DAH, Kamusol and Their
C
5
Epimers. ASIAN J ORG CHEM 2019. [DOI: 10.1002/ajoc.201900407] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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185
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Wei M, McKitrick TR, Mehta AY, Gao C, Jia N, McQuillan AM, Heimburg-Molinaro J, Sun L, Cummings RD. Novel Reversible Fluorescent Glycan Linker for Functional Glycomics. Bioconjug Chem 2019; 30:2897-2908. [PMID: 31600064 DOI: 10.1021/acs.bioconjchem.9b00613] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
To aid in generating complex and diverse natural glycan libraries for functional glycomics, more efficient and reliable methods are needed to derivatize glycans. Here we present our development of a reversible, cleavable bifunctional linker 3-(methoxyamino)propylamine (MAPA). As the fluorenylmethyloxycarbonate (Fmoc) version (F-MAPA), it is highly fluorescent and efficiently derivatizes free reducing glycans to generate closed-ring derivatives that preserve the structural integrity of glycans. A library of glycans were derivatized and used to generate a covalent glycan microarray using N-hydroxysuccinimide derivatization. The array was successfully interrogated by a variety of lectins and antibodies, demonstrating the importance of closed-ring chemistry. The glycan derivatization was also performed at large scale using milligram quantities of glycans and excess F-MAPA, and the reaction system was successfully recycled up to five times, without an apparent decrease in conjugation efficiency. The MAPA-glycan is also easy to link to protein to generate neoglycoproteins with equivalent glycan densities. Importantly, the MAPA linker can be reversibly cleaved to regenerate free reducing glycans for detailed structural analysis (catch-and-release), often critical for functional studies of undefined glycans from natural sources. The high conjugation efficiency, bright fluorescence, and reversible cleavage of the linker enable access to natural glycans for functional glycomics.
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Affiliation(s)
- Mohui Wei
- Department of Surgery, Beth Israel Deaconess Medical Center , Harvard Medical School , National Center for Functional Glycomics, CLS 11087-3 Blackfan Circle , Boston , Massachusetts 02115 , United States
| | - Tanya R McKitrick
- Department of Surgery, Beth Israel Deaconess Medical Center , Harvard Medical School , National Center for Functional Glycomics, CLS 11087-3 Blackfan Circle , Boston , Massachusetts 02115 , United States
| | - Akul Y Mehta
- Department of Surgery, Beth Israel Deaconess Medical Center , Harvard Medical School , National Center for Functional Glycomics, CLS 11087-3 Blackfan Circle , Boston , Massachusetts 02115 , United States
| | - Chao Gao
- Department of Surgery, Beth Israel Deaconess Medical Center , Harvard Medical School , National Center for Functional Glycomics, CLS 11087-3 Blackfan Circle , Boston , Massachusetts 02115 , United States
| | - Nan Jia
- Department of Surgery, Beth Israel Deaconess Medical Center , Harvard Medical School , National Center for Functional Glycomics, CLS 11087-3 Blackfan Circle , Boston , Massachusetts 02115 , United States
| | - Alyssa M McQuillan
- Department of Surgery, Beth Israel Deaconess Medical Center , Harvard Medical School , National Center for Functional Glycomics, CLS 11087-3 Blackfan Circle , Boston , Massachusetts 02115 , United States
| | - Jamie Heimburg-Molinaro
- Department of Surgery, Beth Israel Deaconess Medical Center , Harvard Medical School , National Center for Functional Glycomics, CLS 11087-3 Blackfan Circle , Boston , Massachusetts 02115 , United States
| | - Lijun Sun
- Department of Surgery, Beth Israel Deaconess Medical Center , Harvard Medical School , National Center for Functional Glycomics, CLS 11087-3 Blackfan Circle , Boston , Massachusetts 02115 , United States
| | - Richard D Cummings
- Department of Surgery, Beth Israel Deaconess Medical Center , Harvard Medical School , National Center for Functional Glycomics, CLS 11087-3 Blackfan Circle , Boston , Massachusetts 02115 , United States
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186
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Cheng JMH, Chee SH, Dölen Y, Verdoes M, Timmer MSM, Stocker BL. An efficient synthesis of a 6″-BODIPY-α-Galactosylceramide probe for monitoring α-Galactosylceramide uptake by cells. Carbohydr Res 2019; 486:107840. [PMID: 31689579 DOI: 10.1016/j.carres.2019.107840] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2019] [Revised: 10/14/2019] [Accepted: 10/15/2019] [Indexed: 01/07/2023]
Abstract
Herein, an efficient synthesis of BODIPY-α-Galactosylceramide 3, which can be used to study the cellular uptake of the potent immunostimulatory parent compound α-Galactosylceramide, is reported. Key in our synthetic strategy is the six-step synthesis of the core BODIPY scaffold (64% yield overall) and its quantitative conversion to an N-hydroxysuccinimidyl ester to facilitate conjugation and purification of the target glycolipid. For the preparation of the core of the glycolipid, the solubility of the lipid acceptor proved to be critical. The ability of BODIPY-αGalCer 3 to activate invariant natural killer cells was then demonstrated in vitro.
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Affiliation(s)
- Janice M H Cheng
- School of Chemical and Physical Sciences, Victoria University of Wellington, PO Box 600, 6140, Wellington, New Zealand
| | - Stephanie H Chee
- School of Chemical and Physical Sciences, Victoria University of Wellington, PO Box 600, 6140, Wellington, New Zealand
| | - Yusuf Dölen
- Department of Tumor Immunology, Radboud Institute for Molecular Life Sciences, Radboud University Medical Center, Geert Grooteplein 26, 6525, GA, Nijmegen, the Netherlands
| | - Martijn Verdoes
- Department of Tumor Immunology, Radboud Institute for Molecular Life Sciences, Radboud University Medical Center, Geert Grooteplein 26, 6525, GA, Nijmegen, the Netherlands
| | - Mattie S M Timmer
- School of Chemical and Physical Sciences, Victoria University of Wellington, PO Box 600, 6140, Wellington, New Zealand.
| | - Bridget L Stocker
- School of Chemical and Physical Sciences, Victoria University of Wellington, PO Box 600, 6140, Wellington, New Zealand
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187
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Liu H, Hansen T, Zhou SY, Wen GE, Liu XX, Zhang QJ, Codée JDC, Schmidt RR, Sun JS. Dual-Participation Protecting Group Solves the Anomeric Stereocontrol Problems in Glycosylation Reactions. Org Lett 2019; 21:8713-8717. [DOI: 10.1021/acs.orglett.9b03321] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Affiliation(s)
- Hui Liu
- National Research Center for Carbohydrate Synthesis, Jiangxi Normal University, 99 Ziyang Avenue, Nanchang 330022, China
| | - Thomas Hansen
- Leiden Institute of Chemistry, Leiden University, Einsteinweg 55, 2333 CC Leiden, Netherlands
| | - Si-Yu Zhou
- National Research Center for Carbohydrate Synthesis, Jiangxi Normal University, 99 Ziyang Avenue, Nanchang 330022, China
| | - Guo-En Wen
- National Research Center for Carbohydrate Synthesis, Jiangxi Normal University, 99 Ziyang Avenue, Nanchang 330022, China
| | - Xu-Xue Liu
- National Research Center for Carbohydrate Synthesis, Jiangxi Normal University, 99 Ziyang Avenue, Nanchang 330022, China
| | - Qing-Ju Zhang
- National Research Center for Carbohydrate Synthesis, Jiangxi Normal University, 99 Ziyang Avenue, Nanchang 330022, China
| | - Jeroen D. C. Codée
- Leiden Institute of Chemistry, Leiden University, Einsteinweg 55, 2333 CC Leiden, Netherlands
| | - Richard R. Schmidt
- National Research Center for Carbohydrate Synthesis, Jiangxi Normal University, 99 Ziyang Avenue, Nanchang 330022, China
- Department of Chemistry, University of Konstanz, D-78457 Konstanz, Germany
| | - Jian-Song Sun
- National Research Center for Carbohydrate Synthesis, Jiangxi Normal University, 99 Ziyang Avenue, Nanchang 330022, China
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188
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Hydrolysis of Glycosyl Thioimidates by Glycoside Hydrolase Requires Remote Activation for Efficient Activity. Catalysts 2019. [DOI: 10.3390/catal9100826] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
Chemoenzymatic synthesis of glycosides relies on efficient glycosyl donor substrates able to react rapidly and efficiently, yet with increased stability towards chemical or enzymatic hydrolysis. In this context, glycosyl thioimidates have previously been used as efficient donors, in the case of hydrolysis or thioglycoligation. In both cases, the release of the thioimidoyl aglycone was remotely activated through a protonation driven by a carboxylic residue in the active site of the corresponding enzymes. A recombinant glucosidase (DtGly) from Dictyoglomus themophilum, previously used in biocatalysis, was also able to use such glycosyl thioimidates as substrates. Yet, enzymatic kinetic values analysis, coupled to mutagenesis and in silico modelling of DtGly/substrate complexes demonstrated that the release of the thioimidoyl moiety during catalysis is only driven by its leaving group ability, without the activation of a remote protonation. In the search of efficient glycosyl donors, glycosyl thioimidates are attractive and efficient. Their utility, however, is limited to enzymes able to promote leaving group release by remote activation.
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189
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Liu R, Li X, Li X, Wang J, Yang Y. Gold(I)-Catalyzed Intermolecular Rearrangement Reaction of Glycosyl Alkynoic β-Ketoesters for the Synthesis of 4-O-Glycosylated 2-Pyrones. J Org Chem 2019; 84:14141-14150. [DOI: 10.1021/acs.joc.9b01582] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Rongkun Liu
- Shanghai Key Laboratory of New Drug Design, School of Pharmacy, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, China
| | - Xiaoqian Li
- Shanghai Key Laboratory of New Drug Design, School of Pharmacy, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, China
| | - Xiaona Li
- Shanghai Key Laboratory of New Drug Design, School of Pharmacy, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, China
| | - Jiazhe Wang
- Shanghai Key Laboratory of New Drug Design, School of Pharmacy, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, China
| | - You Yang
- Shanghai Key Laboratory of New Drug Design, School of Pharmacy, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, China
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190
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Zu Y, Cai C, Sheng J, Cheng L, Feng Y, Zhang S, Zhang Q, Chai Y. n-Pentenyl-Type Glycosides for Catalytic Glycosylation and Their Application in Single-Catalyst One-Pot Oligosaccharide Assemblies. Org Lett 2019; 21:8270-8274. [DOI: 10.1021/acs.orglett.9b03038] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Yujia Zu
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, Xi’an, Shaanxi 710119, P. R. China
| | - Chenglin Cai
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, Xi’an, Shaanxi 710119, P. R. China
| | - Jingyuan Sheng
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, Xi’an, Shaanxi 710119, P. R. China
| | - Lili Cheng
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, Xi’an, Shaanxi 710119, P. R. China
| | - Yingle Feng
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, Xi’an, Shaanxi 710119, P. R. China
| | - Shengyong Zhang
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, Xi’an, Shaanxi 710119, P. R. China
| | - Qi Zhang
- School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi’an, Shaanxi 710119, P. R. China
| | - Yonghai Chai
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, Xi’an, Shaanxi 710119, P. R. China
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191
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Miura K, Tsukagoshi T, Hirano T, Nishio T, Hakamata W. Development of Fluorogenic Substrates of α-l-Fucosidase Useful for Inhibitor Screening and Gene-expression Profiling. ACS Med Chem Lett 2019; 10:1309-1313. [PMID: 31531202 DOI: 10.1021/acsmedchemlett.9b00259] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2019] [Accepted: 08/26/2019] [Indexed: 12/18/2022] Open
Abstract
Inhibitors of human α-l-fucosidases, tissue α-l-fucosidase (tFuc), and plasma α-l-fucosidase reportedly play roles in multiple diseases, suggesting their therapeutic potential for gastric disease associated with Helicobacter pylori and fucosidosis. Terminal fucose linkages on glycoproteins and glycolipids are a natural substrate for both enzymes; however, there are currently no fluorogenic substrates allowing their cellular evaluation. Here, we described the development of novel three-color fluorogenic substrates for lysosome-localized tFuc that exhibited excellent specificity and sensitivity in three human cell lines. Additionally, we developed a cell-based high-throughput inhibitor screening system in a 96-well format and a cell-based inhibitory activity evaluation system in a 6-well format for tFuc inhibitors using this substrate, which allowed accurate quantification of the inhibition rate. Moreover, analysis of significant changes in gene expression resulting from 30% inhibition of tFuc in HeLa cells revealed potential roles in gastric disease.
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Affiliation(s)
- Kazuki Miura
- Department of Chemistry and Life Science, College of Bioresource Sciences, Nihon University, 1866 Kameino, Fujisawa-shi, Kanagawa 252-0880, Japan
| | - Takumi Tsukagoshi
- Department of Chemistry and Life Science, College of Bioresource Sciences, Nihon University, 1866 Kameino, Fujisawa-shi, Kanagawa 252-0880, Japan
| | - Takako Hirano
- Department of Chemistry and Life Science, College of Bioresource Sciences, Nihon University, 1866 Kameino, Fujisawa-shi, Kanagawa 252-0880, Japan
| | - Toshiyuki Nishio
- Department of Chemistry and Life Science, College of Bioresource Sciences, Nihon University, 1866 Kameino, Fujisawa-shi, Kanagawa 252-0880, Japan
| | - Wataru Hakamata
- Department of Chemistry and Life Science, College of Bioresource Sciences, Nihon University, 1866 Kameino, Fujisawa-shi, Kanagawa 252-0880, Japan
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192
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Micoli F, Del Bino L, Alfini R, Carboni F, Romano MR, Adamo R. Glycoconjugate vaccines: current approaches towards faster vaccine design. Expert Rev Vaccines 2019; 18:881-895. [PMID: 31475596 DOI: 10.1080/14760584.2019.1657012] [Citation(s) in RCA: 52] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
Introduction: Over the last decades, glycoconjugate vaccines have been proven to be a successful strategy to prevent infectious diseases. Many diseases remain to be controlled, especially in developing countries, and emerging antibiotic-resistant bacteria present an alarming public-health threat. The increasing complexity of future vaccines, and the need to accelerate development processes have triggered the development of faster approaches to glycoconjugate vaccines design. Areas covered: This review provides an overview of recent progress in glycoconjugation technologies toward faster vaccine design. Expert opinion: Among the different emerging approaches, glycoengineering has the potential to combine glycan assembly and conjugation to carrier systems (such as proteins or outer membrane vesicles) in one step, resulting in a simplified manufacturing process and fewer analytical controls. Chemical and enzymatic strategies, and their automation can facilitate glycoepitope identification for vaccine design. Other approaches, such as the liposomal encapsulation of polysaccharides, potentially enable fast and easy combination of numerous antigens in the same formulation. Additional progress is envisaged in the near future, and some of these systems still need to be further validated in humans. In parallel, new strategies are needed to accelerate the vaccine development process, including the associated clinical trials, up to vaccine release onto the market.
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Affiliation(s)
- Francesca Micoli
- Technology Platform, GSK Vaccines Institute for Global Health s.r.l , Siena , Italy
| | | | - Renzo Alfini
- Technology Platform, GSK Vaccines Institute for Global Health s.r.l , Siena , Italy
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193
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Shaw M, Kumar A. Additive‐Free Gold(III)‐Catalyzed Stereoselective Synthesis of 2‐Deoxyglycosides Using Phenylpropiolate Glycosides as Donors. Chem Asian J 2019; 14:4651-4658. [DOI: 10.1002/asia.201900888] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2019] [Revised: 08/05/2019] [Indexed: 11/07/2022]
Affiliation(s)
- Mukta Shaw
- Department of ChemistryIndian Institute of Technology Patna, Bihta 801106 Bihar India
| | - Amit Kumar
- Department of ChemistryIndian Institute of Technology Patna, Bihta 801106 Bihar India
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194
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Toward Automated Enzymatic Glycan Synthesis in a Compartmented Flow Microreactor System. Adv Synth Catal 2019. [DOI: 10.1002/adsc.201900709] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
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195
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Li QW, Zhang R, Zhou ZQ, Sun WY, Fan HX, Wang Y, Xiao J, So KF, Yao XS, Gao H. Phenylpropanoid glycosides from the fruit of Lycium barbarum L. and their bioactivity. PHYTOCHEMISTRY 2019; 164:60-66. [PMID: 31096077 DOI: 10.1016/j.phytochem.2019.04.017] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/23/2019] [Revised: 04/05/2019] [Accepted: 04/25/2019] [Indexed: 06/09/2023]
Abstract
Fifteen phenylpropanoid glycosides, including six undescribed compounds were isolated from the fruit of Lycium barbarum L. (Solanaceae) (goji or wolfberry). Their structures were identified by detailed spectroscopic analyses. Seven known compounds were firstly isolated from the genus Lycium, in which the 1D and 2D NMR data of one compound were reported for the first time. Notably, two undescribed compounds were a pair of rare tautomeric glycoside anomers characterized by the presence of free anomeric hydroxy. Antioxidant and hypoglycemic activities of all these compounds were assessed using DPPH radical scavenging, oxygen radical absorbance capacity (ORAC), and α-glucosidase inhibitory assays, respectively. These compounds showed different levels of oxygen radical absorbance capacity, and some isolates exhibited potent antioxidant activity with greater ORAC values than the positive control (EGCG).
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Affiliation(s)
- Qing-Wen Li
- Institute of Traditional Chinese Medicine and Natural Products, College of Pharmacy / Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM and New Drugs Research, Jinan University, Guangzhou 510632, People's Republic of China
| | - Rui Zhang
- Clinical Medicine Research Institute, The First Affiliated Hospital of Jinan University, Guangzhou 510632, People's Republic of China
| | - Zheng-Qun Zhou
- Institute of Traditional Chinese Medicine and Natural Products, College of Pharmacy / Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM and New Drugs Research, Jinan University, Guangzhou 510632, People's Republic of China; Integrated Chinese and Western Medicine Postdoctoral Research Station, Jinan University, Guangzhou 510632, People's Republic of China.
| | - Wan-Yang Sun
- Institute of Traditional Chinese Medicine and Natural Products, College of Pharmacy / Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM and New Drugs Research, Jinan University, Guangzhou 510632, People's Republic of China
| | - Hong-Xia Fan
- Institute of Traditional Chinese Medicine and Natural Products, College of Pharmacy / Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM and New Drugs Research, Jinan University, Guangzhou 510632, People's Republic of China; Integrated Chinese and Western Medicine Postdoctoral Research Station, Jinan University, Guangzhou 510632, People's Republic of China
| | - Ying Wang
- Guangdong Provincial Key Laboratory of Applied Botany, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, People's Republic of China
| | - Jia Xiao
- Clinical Medicine Research Institute, The First Affiliated Hospital of Jinan University, Guangzhou 510632, People's Republic of China
| | - Kwok-Fai So
- Guangdong Medical Key Laboratory of Brain Function and Diseases, GMH Institute of Central Nervous System Regeneration, Jinan University, Guangzhou, 510632, People's Republic of China
| | - Xin-Sheng Yao
- Institute of Traditional Chinese Medicine and Natural Products, College of Pharmacy / Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM and New Drugs Research, Jinan University, Guangzhou 510632, People's Republic of China
| | - Hao Gao
- Institute of Traditional Chinese Medicine and Natural Products, College of Pharmacy / Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM and New Drugs Research, Jinan University, Guangzhou 510632, People's Republic of China.
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196
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Prasad V, Mishra N, Agrahari AK, Singh SK, Mohapatra PP, Tiwari VK. Cycloelimination-assisted Combinatorial Synthesis of Diverse Heterocyclic Scaffolds of Chemotherapeutic Values. CURR ORG CHEM 2019. [DOI: 10.2174/1385272823666190405145805] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Recent advances in high-throughput, automated techniques combined with the identification of new therapeutic targets in genome sequencing and molecular biology have generated a need for a large collection of diverse heterocyclic scaffolds. This inspires toward the development of novel reaction sequences and linking strategies to generate libraries of diverse simple to complex heterocyclic systems. In this regard, combinatorial chemistry has emerged as an excellent technology platform for the rapid assembly of building blocks to synthesize complex molecular structures with great ease in a few synthetic steps. By means of the implementation of high-throughput screening for the biological evaluation of hits and leads, combinatorial libraries have become important assets in drug discovery and development. In the last two decades, the cyclorelease strategy that minimizes the chemical and tethering implications by releasing the intact desired target molecule in the final step of reaction has attracted much attention. Recently, a particular interest is developing in linking strategies, where loading and cleavage steps contribute to the complexity of the target structure rather than only extraneous manipulations. This review summarises the practical and high-yielding approaches of solid phase combinatorial synthesis for diverse high-purity heterocyclic skeletons of pharmacological importance involving the cycloelimination strategy.
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Affiliation(s)
- Virendra Prasad
- Department of Chemistry, Institute of Science, Banaras Hindu University, Varanasi-221005, India
| | - Nidhi Mishra
- Department of Chemistry, Institute of Science, Banaras Hindu University, Varanasi-221005, India
| | - Anand K. Agrahari
- Department of Chemistry, Institute of Science, Banaras Hindu University, Varanasi-221005, India
| | - Sumit K. Singh
- Department of Chemistry, Institute of Science, Banaras Hindu University, Varanasi-221005, India
| | | | - Vinod K. Tiwari
- Department of Chemistry, Institute of Science, Banaras Hindu University, Varanasi-221005, India
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197
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Otsuka Y, Yamamoto T, Fukase K. β‐Selective Glycosylation by Using
O
‐Aryl‐Protected Glycosyl Donors. Chem Asian J 2019; 14:2719-2723. [DOI: 10.1002/asia.201900700] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2019] [Indexed: 12/18/2022]
Affiliation(s)
- Yuji Otsuka
- Department of ChemistryGraduate School of ScienceOsaka University Machikaneyama 1-1 Toyonaka Osaka Prefecture 560-0043 Japan
- Peptide Institute, Inc. Saito-Asagi 7-2-9 Ibaraki Osaka Prefecture 567-0085 Japan
| | - Toshihiro Yamamoto
- Department of ChemistryGraduate School of ScienceOsaka University Machikaneyama 1-1 Toyonaka Osaka Prefecture 560-0043 Japan
- Peptide Institute, Inc. Saito-Asagi 7-2-9 Ibaraki Osaka Prefecture 567-0085 Japan
| | - Koichi Fukase
- Department of ChemistryGraduate School of ScienceOsaka University Machikaneyama 1-1 Toyonaka Osaka Prefecture 560-0043 Japan
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198
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Mahapa A, Samanta GC, Maiti K, Chatterji D, Jayaraman N. Mannopyranoside Glycolipids Inhibit Mycobacterial and Biofilm Growth and Potentiate Isoniazid Inhibition Activities in M. smegmatis. Chembiochem 2019; 20:1966-1976. [PMID: 30951240 DOI: 10.1002/cbic.201900040] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2019] [Revised: 04/04/2019] [Indexed: 12/17/2022]
Abstract
Lipomannan and lipoarabinomannan are integral components of the mycobacterial cell wall. Earlier studies demonstrated that synthetic arabinan and arabinomannan glycolipids acted as inhibitors of mycobacterial growth, in addition to exhibiting inhibitory activities of mycobacterial biofilm. Herein, it is demonstrated that synthetic mannan glycolipids are better inhibitors of mycobacterial growth, whereas lipoarabinomannan has a higher inhibition efficiency to biofilm. Syntheses of mannan glycolipids with a graded number of mannan moieties and an arabinomannan glycolipid are conducted by chemical methods and subsequent mycobacterial growth and biofilm inhibition studies are conducted on Mycobacterium smegmatis. Growth inhibition of (73±3) % is observed with a mannose trisaccharide containing a glycolipid, whereas this glycolipid did not promote biofilm inhibition activity better than that of arabinomannan glycolipid. The antibiotic supplementation activities of glycolipids on growth and biofilm inhibitions are evaluated. Increases in growth and biofilm inhibitions are observed if the antibiotic is supplemented with glycolipids, which leads to a significant reduction of inhibition concentrations of the antibiotic.
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Affiliation(s)
- Avisek Mahapa
- Molecular Biophysics Unit, Indian Institute of Science, Bangalore, 560 012, India
| | - Gopal Ch Samanta
- Department of Organic Chemistry, Indian Institute of Science, Bangalore, 560 012, India
| | - Krishnagopal Maiti
- Department of Organic Chemistry, Indian Institute of Science, Bangalore, 560 012, India
| | - Dipankar Chatterji
- Molecular Biophysics Unit, Indian Institute of Science, Bangalore, 560 012, India
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199
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Yamamoto K, Ichikawa S. Tunicamycin: chemical synthesis and biosynthesis. J Antibiot (Tokyo) 2019; 72:924-933. [PMID: 31235901 DOI: 10.1038/s41429-019-0200-1] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2019] [Revised: 05/20/2019] [Accepted: 05/27/2019] [Indexed: 11/09/2022]
Abstract
Tunicamycins are nucleoside natural products and show antibacterial, antiviral and antitumor activities, which are attributed to their inhibition of enzymatic reactions between polyisoprenyl phosphate and UDP-GlcNAc or UDP-MurNAc-pentapeptide. Because of their various intriguing biological activities, tunicamycins have potential as therapeutic agents for infectious diseases or cancers. Structurally, tunicamycins have a unique structure composed of an undecodialdose skeleton, a lipid chain and a GlcNAc fragment linked by a 1,1-β,α-trehalose-type glycosidic bond. In this mini review, we summarize the total chemical syntheses and biosynthetic studies of tunicamycins.
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Affiliation(s)
- Kazuki Yamamoto
- Faculty of Pharmaceutical Sciences, Hokkaido University, Kita-12, Nishi-6, Kita-ku, Sapporo, 060-0812, Japan
| | - Satoshi Ichikawa
- Faculty of Pharmaceutical Sciences, Hokkaido University, Kita-12, Nishi-6, Kita-ku, Sapporo, 060-0812, Japan. .,Center for Research and Education on Drug Discovery, Faculty of Pharmaceutical Sciences, Hokkaido University, Kita-12, Nishi-6, Kita-ku, Sapporo, 060-0812, Japan.
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200
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Elferink H, Mensink RA, Castelijns WWA, Jansen O, Bruekers JPJ, Martens J, Oomens J, Rijs AM, Boltje TJ. The Glycosylation Mechanisms of 6,3‐Uronic Acid Lactones. Angew Chem Int Ed Engl 2019; 58:8746-8751. [DOI: 10.1002/anie.201902507] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2019] [Revised: 04/15/2019] [Indexed: 12/14/2022]
Affiliation(s)
- Hidde Elferink
- Radboud UniversityInstitute for Molecules and Materials Heyendaalseweg 135 6525 AJ Nijmegen The Netherlands
| | - Rens A. Mensink
- Radboud UniversityInstitute for Molecules and Materials Heyendaalseweg 135 6525 AJ Nijmegen The Netherlands
| | - Wilke W. A. Castelijns
- Radboud UniversityInstitute for Molecules and Materials Heyendaalseweg 135 6525 AJ Nijmegen The Netherlands
| | - Oscar Jansen
- Radboud UniversityInstitute for Molecules and Materials Heyendaalseweg 135 6525 AJ Nijmegen The Netherlands
- Radboud UniversityInstitute for Molecules and Materials, FELIX laboratory Toernooiveld 7c 6525 ED Nijmegen The Netherlands
| | - Jeroen P. J. Bruekers
- Radboud UniversityInstitute for Molecules and Materials Heyendaalseweg 135 6525 AJ Nijmegen The Netherlands
| | - Jonathan Martens
- Radboud UniversityInstitute for Molecules and Materials, FELIX laboratory Toernooiveld 7c 6525 ED Nijmegen The Netherlands
| | - Jos Oomens
- Radboud UniversityInstitute for Molecules and Materials, FELIX laboratory Toernooiveld 7c 6525 ED Nijmegen The Netherlands
| | - Anouk M. Rijs
- Radboud UniversityInstitute for Molecules and Materials, FELIX laboratory Toernooiveld 7c 6525 ED Nijmegen The Netherlands
| | - Thomas J. Boltje
- Radboud UniversityInstitute for Molecules and Materials Heyendaalseweg 135 6525 AJ Nijmegen The Netherlands
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