1
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Manzano VE, Dada L, Uhrig ML, Varela O. Synthesis of sugar enones and their use as powerful synthetic precursors of thiodisaccharides. Carbohydr Res 2023; 529:108833. [PMID: 37216699 DOI: 10.1016/j.carres.2023.108833] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2023] [Revised: 05/04/2023] [Accepted: 05/08/2023] [Indexed: 05/24/2023]
Abstract
Monosaccharide derivatives having a double bond conjugated to a carbonyl (sugar enones or enuloses) are relevant synthetic tools. They are also suitable starting materials, or versatile intermediates, for the synthesis of a wide variety of natural or synthetic compounds with a broad spectrum of biological and pharmacological activities. The preparation of enones is mainly focused on the search for more efficient and diastereoselective synthetic methodologies. The usefulness of enuloses relies on the diverse reaction possibilities offered by alkene and carbonyl double bonds, which are prone to undergo varied reactions such as halogenation, nitration, epoxidation, reduction, addition, etc. The addition of thiol groups that led to sulfur glycomimetics, such as thiooligosaccharides, is particularly relevant. Therefore, the synthesis of enuloses and the Michael addition of sulfur nucleophiles to give thiosugars or thiodisaccharides are discussed here. Chemical modifications of the conjugate addition products to afford biologically active compounds are also reported.
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Affiliation(s)
- Verónica E Manzano
- Universidad de Buenos Aires, Facultad de Ciencias Exactas y Naturales, Departamento de Química Orgánica, Intendente Güiraldes 2160, C1428EHA, Buenos Aires, Argentina; CONICET- Universidad de Buenos Aires, Centro de Investigaciones en Hidratos de Carbono (CIHIDECAR), Buenos Aires, Argentina
| | - Lucas Dada
- Universidad de Buenos Aires, Facultad de Ciencias Exactas y Naturales, Departamento de Química Orgánica, Intendente Güiraldes 2160, C1428EHA, Buenos Aires, Argentina; CONICET- Universidad de Buenos Aires, Centro de Investigaciones en Hidratos de Carbono (CIHIDECAR), Buenos Aires, Argentina
| | - María Laura Uhrig
- Universidad de Buenos Aires, Facultad de Ciencias Exactas y Naturales, Departamento de Química Orgánica, Intendente Güiraldes 2160, C1428EHA, Buenos Aires, Argentina; CONICET- Universidad de Buenos Aires, Centro de Investigaciones en Hidratos de Carbono (CIHIDECAR), Buenos Aires, Argentina.
| | - Oscar Varela
- Universidad de Buenos Aires, Facultad de Ciencias Exactas y Naturales, Departamento de Química Orgánica, Intendente Güiraldes 2160, C1428EHA, Buenos Aires, Argentina; CONICET- Universidad de Buenos Aires, Centro de Investigaciones en Hidratos de Carbono (CIHIDECAR), Buenos Aires, Argentina.
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2
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Cortés I, Sarotti AM. E/ Z configurational determination of oximes and related derivatives through quantum mechanics NMR calculations: scope and limitations of the leading probabilistic methods. Org Biomol Chem 2023; 21:2935-2940. [PMID: 36942946 DOI: 10.1039/d3ob00291h] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/16/2023]
Abstract
Oximes and related derivatives featuring a CN double bond are important in many areas of chemistry. Different methods for the determination of the E/Z configuration have been developed, each with its own scope and limitations. While some cannot be used when only one isomer is available, others require special NMR experiments. Here, three popular computational methodologies (DP4, DP4+, and ML-J-DP4) have been thoroughly studied using a challenging test set. Although DP4+ provides the best confidence, its computational cost might be high. On the other hand, ML-J-DP4 shows excellent performance in most cases in a fraction of CPU time. A detailed analysis of the structural factors affecting the NMR prediction and sense of the assignment is also provided.
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Affiliation(s)
- Iván Cortés
- Instituto de Química Rosario (CONICET), Facultad de Ciencias Bioquímicas y Farmacéuticas, Universidad Nacional de Rosario, Suipacha 531, Rosario 2000, Argentina.
| | - Ariel M Sarotti
- Instituto de Química Rosario (CONICET), Facultad de Ciencias Bioquímicas y Farmacéuticas, Universidad Nacional de Rosario, Suipacha 531, Rosario 2000, Argentina.
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3
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Dada L, Colomer JP, Manzano VE, Varela O. Synthesis of thiodisaccharides related to 4-thiolactose. Specific structural modifications increase the inhibitory activity against E. coli β-galactosidase. Org Biomol Chem 2023; 21:2188-2203. [PMID: 36806338 DOI: 10.1039/d2ob02301f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/16/2023]
Abstract
In the search for new glycosidase inhibitors, a set of benzyl β-D-Gal-S-(1→4)-3-deoxy-4-thio-α-D-hexopyranosides was synthesized. Diverse configurations were installed at C-2 and C-4 of the glucose residue. The benzyl glycosidic group was kept intact or substituted by an electron-donating or electron-withdrawing group that could also participate in hydrogen bonding. All thiodisaccharides were found to be inhibitors of E. coli β-galactosidase. In general, benzyl thiodisaccharides were better inhibitors than those substituted (NO2 or NH2) on the benzyl ring. Thiodisaccharides containing a hexopyranoside, instead of a pentopyranoside, showed a weaker inhibitory activity, except for those having the α-D-xylo configuration, which exhibited inhibition constants of the same order of magnitude. These and previous results indicated that the inhibition process by thiodisaccharides is strongly dependent on the configuration of the 3-deoxy-4-thiopyranoside, as well as its substitution pattern (such as the presence of a benzyl glycoside). The enzyme-inhibitor interaction during the hydrolysis process involves a conformational selection resulting from rotation around the thioglycosidic bond and the flexibility of the terminal six-membered ring. Thus, the mentioned structural features of the inhibitor could give rise to favorable ground state conformations for the interaction with the enzyme, similar to those found for selected thiodisaccharides in the bound state. These studies demonstrated that the performance of thiodisaccharides as enzyme inhibitors could be increased by selecting the appropriate configuration and substitution of the hexopyranoside replacing the glucose moiety of 4-thiolactose.
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Affiliation(s)
- Lucas Dada
- Universidad de Buenos Aires, Facultad de Ciencias Exactas y Naturales, Departamento de Química Orgánica, Ciudad Universitaria, Pabellón 2, C1428EHA, Buenos Aires, Argentina. .,Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET)-UBA, Centro de Investigación en Hidratos de Carbono (CIHIDECAR)
| | - Juan Pablo Colomer
- Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET)-UNC, Instituto de Investigaciones en Fisico-Química de Córdoba (INFIQC).,Departamento de Química Orgánica, Facultad de Ciencias Químicas, Universidad Nacional de Córdoba, Ciudad Universitaria, Edificio de Ciencias II, Córdoba, Argentina
| | - Verónica E Manzano
- Universidad de Buenos Aires, Facultad de Ciencias Exactas y Naturales, Departamento de Química Orgánica, Ciudad Universitaria, Pabellón 2, C1428EHA, Buenos Aires, Argentina. .,Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET)-UBA, Centro de Investigación en Hidratos de Carbono (CIHIDECAR)
| | - Oscar Varela
- Universidad de Buenos Aires, Facultad de Ciencias Exactas y Naturales, Departamento de Química Orgánica, Ciudad Universitaria, Pabellón 2, C1428EHA, Buenos Aires, Argentina. .,Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET)-UBA, Centro de Investigación en Hidratos de Carbono (CIHIDECAR)
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4
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Usami Y, Mizobuchi Y, Ijuin M, Yamada T, Morita M, Mizuki K, Yoneyama H, Harusawa S. Synthesis of 6-Halo-Substituted Pericosine A and an Evaluation of Their Antitumor and Antiglycosidase Activities. Mar Drugs 2022; 20:md20070438. [PMID: 35877731 PMCID: PMC9323573 DOI: 10.3390/md20070438] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2022] [Revised: 06/25/2022] [Accepted: 06/28/2022] [Indexed: 11/16/2022] Open
Abstract
The enantiomers of 6-fluoro-, 6-bromo-, and 6-iodopericosine A were synthesized. An efficient synthesis of both enantiomers of pericoxide via 6-bromopericosine A was also developed. These 6-halo-substituted pericosine A derivatives were evaluated in terms of their antitumor activity against three types of tumor cells (p388, L1210, and HL-60) and glycosidase inhibitory activity. The bromo- and iodo-congeners exhibited moderate antitumor activity similar to pericosine A against the three types of tumor cell lines studied. The fluorinated compound was less active than the others, including pericosine A. In the antitumor assay, no significant difference in potency between the enantiomers was observed for any of the halogenated compounds. Meanwhile, the (−)-6-fluoro- and (−)-6-bromo-congeners inhibited α-glucosidase to a greater extent than those of their corresponding (+)-enantiomers, whereas (+)-iodopericosine A showed increased activity when compared to its (−)-enantiomer.
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Affiliation(s)
- Yoshihide Usami
- Department of Pharmaceutical Organic Chemistry, Osaka University of Pharmaceutical Sciences, Nasahara 4-20-1, Takatsuki 569-1094, Osaka, Japan; (Y.M.); (M.I.); (M.M.); (K.M.); (H.Y.); (S.H.)
- Correspondence: ; Tel.: +81-796-90-1087; Fax: +81-796-90-1005
| | - Yoshino Mizobuchi
- Department of Pharmaceutical Organic Chemistry, Osaka University of Pharmaceutical Sciences, Nasahara 4-20-1, Takatsuki 569-1094, Osaka, Japan; (Y.M.); (M.I.); (M.M.); (K.M.); (H.Y.); (S.H.)
| | - Mai Ijuin
- Department of Pharmaceutical Organic Chemistry, Osaka University of Pharmaceutical Sciences, Nasahara 4-20-1, Takatsuki 569-1094, Osaka, Japan; (Y.M.); (M.I.); (M.M.); (K.M.); (H.Y.); (S.H.)
| | - Takeshi Yamada
- Department of Medicinal Molecular Chemistry, Osaka University of Pharmaceutical Sciences, Nasahara 4-20-1, Takatsuki 569-1094, Osaka, Japan;
| | - Mizuki Morita
- Department of Pharmaceutical Organic Chemistry, Osaka University of Pharmaceutical Sciences, Nasahara 4-20-1, Takatsuki 569-1094, Osaka, Japan; (Y.M.); (M.I.); (M.M.); (K.M.); (H.Y.); (S.H.)
| | - Koji Mizuki
- Department of Pharmaceutical Organic Chemistry, Osaka University of Pharmaceutical Sciences, Nasahara 4-20-1, Takatsuki 569-1094, Osaka, Japan; (Y.M.); (M.I.); (M.M.); (K.M.); (H.Y.); (S.H.)
| | - Hiroki Yoneyama
- Department of Pharmaceutical Organic Chemistry, Osaka University of Pharmaceutical Sciences, Nasahara 4-20-1, Takatsuki 569-1094, Osaka, Japan; (Y.M.); (M.I.); (M.M.); (K.M.); (H.Y.); (S.H.)
| | - Shinya Harusawa
- Department of Pharmaceutical Organic Chemistry, Osaka University of Pharmaceutical Sciences, Nasahara 4-20-1, Takatsuki 569-1094, Osaka, Japan; (Y.M.); (M.I.); (M.M.); (K.M.); (H.Y.); (S.H.)
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5
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Dada L, Manzano VE, Varela O. Benzyl Glycosides of Thiodisaccharides. Influence of C‐2 Configuration of the Reducing End and Substitution at Benzyl on the Inhibition of the
E. coli
β‐Galactosidase. ChemistrySelect 2021. [DOI: 10.1002/slct.202103461] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Lucas Dada
- Universidad de Buenos Aires Facultad de Ciencias Exactas y Naturales Departamento de Química Orgánica. Ciudad Universitaria, Pabellón 2 C1428EHA Buenos Aires Argentina
- Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET)-UBA, Centro de Investigación en Hidratos de Carbono (CIHIDECAR)
| | - Verónica E. Manzano
- Universidad de Buenos Aires Facultad de Ciencias Exactas y Naturales Departamento de Química Orgánica. Ciudad Universitaria, Pabellón 2 C1428EHA Buenos Aires Argentina
- Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET)-UBA, Centro de Investigación en Hidratos de Carbono (CIHIDECAR)
| | - Oscar Varela
- Universidad de Buenos Aires Facultad de Ciencias Exactas y Naturales Departamento de Química Orgánica. Ciudad Universitaria, Pabellón 2 C1428EHA Buenos Aires Argentina
- Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET)-UBA, Centro de Investigación en Hidratos de Carbono (CIHIDECAR)
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6
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Cristófalo AE, Cano ME, Uhrig ML. Synthesis of Thiodisaccharides Bearing N-Acetylhexosamine Residues: Challenges, Achievements and Perspectives. CHEM REC 2021; 21:2808-2836. [PMID: 34170606 DOI: 10.1002/tcr.202100146] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2021] [Revised: 06/09/2021] [Accepted: 06/10/2021] [Indexed: 01/06/2023]
Abstract
Carbohydrate-protein interactions are involved in a myriad of biological processes. Thus, glycomimetics have arisen as one of the most promising synthetic targets to that end. Within the broad variety of glycomimetics, thiodisaccharides have proven to be excellent tools to study these processes, and even more, some of them unveiled interesting biological activities. This review brings together research made on the introduction of N-acetylhexosamine residues into thiodisaccharides to date, passing through classic substitution (as SN 2, thioglycosylation and ring-opening reactions) and addition (as thiol-ene coupling and Michael-type additions) reactions. Recent and interesting developments regarding addition reactions to vinyl azides, cross-coupling reactions and novel chemoenzymatic methods are also discussed.
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Affiliation(s)
- Alejandro E Cristófalo
- Universidad de Buenos Aires, Facultad de Ciencias Exactas y Naturales., Departamento de Química Orgánica, Intendente Güiraldes, 2160 (C1428EHA), Buenos Aires, Argentina.,CONICET - Universidad de Buenos Aires, Centro de Investigaciones en Hidratos de Carbono (CIHIDECAR), Buenos Aires, Argentina
| | - María Emilia Cano
- Universidad de Buenos Aires, Facultad de Ciencias Exactas y Naturales., Departamento de Química Orgánica, Intendente Güiraldes, 2160 (C1428EHA), Buenos Aires, Argentina.,CONICET - Universidad de Buenos Aires, Centro de Investigaciones en Hidratos de Carbono (CIHIDECAR), Buenos Aires, Argentina
| | - María Laura Uhrig
- Universidad de Buenos Aires, Facultad de Ciencias Exactas y Naturales., Departamento de Química Orgánica, Intendente Güiraldes, 2160 (C1428EHA), Buenos Aires, Argentina.,CONICET - Universidad de Buenos Aires, Centro de Investigaciones en Hidratos de Carbono (CIHIDECAR), Buenos Aires, Argentina
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7
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Feng G, Wang S, Lv J, Luo T, Wu Y, Dong H. Improved Synthesis of 1‐Glycosyl Thioacetates and Its Application in the Synthesis of Thioglucoside Gliflozin Analogues. European J Org Chem 2021. [DOI: 10.1002/ejoc.202100357] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Guang‐Jing Feng
- Key Laboratory of Material Chemistry for Energy Conversion and Storage Ministry of Education, School of Chemistry & Chemical Engineering Huazhong University of Science & Technology Luoyu Road 1037 Wuhan 430074 PR China
| | - Shuang‐Shuang Wang
- Key Laboratory of Material Chemistry for Energy Conversion and Storage Ministry of Education, School of Chemistry & Chemical Engineering Huazhong University of Science & Technology Luoyu Road 1037 Wuhan 430074 PR China
| | - Jian Lv
- Key Laboratory of Material Chemistry for Energy Conversion and Storage Ministry of Education, School of Chemistry & Chemical Engineering Huazhong University of Science & Technology Luoyu Road 1037 Wuhan 430074 PR China
| | - Tao Luo
- Key Laboratory of Material Chemistry for Energy Conversion and Storage Ministry of Education, School of Chemistry & Chemical Engineering Huazhong University of Science & Technology Luoyu Road 1037 Wuhan 430074 PR China
| | - Yuzhou Wu
- Key Laboratory of Material Chemistry for Energy Conversion and Storage Ministry of Education, School of Chemistry & Chemical Engineering Huazhong University of Science & Technology Luoyu Road 1037 Wuhan 430074 PR China
| | - Hai Dong
- Key Laboratory of Material Chemistry for Energy Conversion and Storage Ministry of Education, School of Chemistry & Chemical Engineering Huazhong University of Science & Technology Luoyu Road 1037 Wuhan 430074 PR China
- Hubei Key Laboratory of Bioinorganic Chemistry and Materia Medica Huazhong University of Science & Technology Luoyu Road 1037 Wuhan 430074 PR China
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8
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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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9
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Usami Y, Higuchi M, Mizuki K, Yamamoto M, Kanki M, Nakasone C, Sugimoto Y, Shibano M, Uesawa Y, Nagai J, Yoneyama H, Harusawa S. Syntheses and Glycosidase Inhibitory Activities, and in Silico Docking Studies of Pericosine E Analogs Methoxy-Substituted at C6. Mar Drugs 2020; 18:E221. [PMID: 32326065 PMCID: PMC7230162 DOI: 10.3390/md18040221] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2020] [Revised: 04/15/2020] [Accepted: 04/17/2020] [Indexed: 12/14/2022] Open
Abstract
Inspired by the significant -glucosidase inhibitory activities of (+)- and (-)-pericosine E, we herein designed and synthesized 16 analogs of these marine natural products bearing a methoxy group instead of a chlorine atom at C6. Four of these compounds exhibited moderate -glucosidase inhibitory activities, which were weaker than those of the corresponding chlorine-containing species. The four compounds could be prepared by coupling reactions utilizing the (-)-pericosine B moiety. An additional in silico docking simulation suggested that the reason of reduced activity of the C6-methoxylated analogs might be an absence of hydrogen bonding between a methoxy group with the surrounding amino acid residues in the active site in -glucosidase.
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Affiliation(s)
- Yoshihide Usami
- Department of Pharmaceutical Organic Chemistry, Osaka University of Pharmaceutical Sciences, Nasahara 4-20-1, Takatsuki, Osaka 569-1094, Japan; (M.H.); (K.M.); (M.Y.); (M.K.); (C.N.); (Y.S.); (H.Y.); (S.H.)
| | - Megumi Higuchi
- Department of Pharmaceutical Organic Chemistry, Osaka University of Pharmaceutical Sciences, Nasahara 4-20-1, Takatsuki, Osaka 569-1094, Japan; (M.H.); (K.M.); (M.Y.); (M.K.); (C.N.); (Y.S.); (H.Y.); (S.H.)
| | - Koji Mizuki
- Department of Pharmaceutical Organic Chemistry, Osaka University of Pharmaceutical Sciences, Nasahara 4-20-1, Takatsuki, Osaka 569-1094, Japan; (M.H.); (K.M.); (M.Y.); (M.K.); (C.N.); (Y.S.); (H.Y.); (S.H.)
| | - Mizuki Yamamoto
- Department of Pharmaceutical Organic Chemistry, Osaka University of Pharmaceutical Sciences, Nasahara 4-20-1, Takatsuki, Osaka 569-1094, Japan; (M.H.); (K.M.); (M.Y.); (M.K.); (C.N.); (Y.S.); (H.Y.); (S.H.)
| | - Mao Kanki
- Department of Pharmaceutical Organic Chemistry, Osaka University of Pharmaceutical Sciences, Nasahara 4-20-1, Takatsuki, Osaka 569-1094, Japan; (M.H.); (K.M.); (M.Y.); (M.K.); (C.N.); (Y.S.); (H.Y.); (S.H.)
| | - Chika Nakasone
- Department of Pharmaceutical Organic Chemistry, Osaka University of Pharmaceutical Sciences, Nasahara 4-20-1, Takatsuki, Osaka 569-1094, Japan; (M.H.); (K.M.); (M.Y.); (M.K.); (C.N.); (Y.S.); (H.Y.); (S.H.)
| | - Yuya Sugimoto
- Department of Pharmaceutical Organic Chemistry, Osaka University of Pharmaceutical Sciences, Nasahara 4-20-1, Takatsuki, Osaka 569-1094, Japan; (M.H.); (K.M.); (M.Y.); (M.K.); (C.N.); (Y.S.); (H.Y.); (S.H.)
| | - Makio Shibano
- Department of Natural Products Research, Osaka University of Pharmaceutical Sciences, Nasahara 4-20-1, Takatsuki, Osaka 569-1094, Japan;
| | - Yoshihiro Uesawa
- Department of Medical Molecular Informatics, Meiji Pharmaceutical University, 2-522-1 Noshio, Kiyose, Tokyo 204-8588, Japan; (Y.U.); (J.N.)
| | - Junko Nagai
- Department of Medical Molecular Informatics, Meiji Pharmaceutical University, 2-522-1 Noshio, Kiyose, Tokyo 204-8588, Japan; (Y.U.); (J.N.)
| | - Hiroki Yoneyama
- Department of Pharmaceutical Organic Chemistry, Osaka University of Pharmaceutical Sciences, Nasahara 4-20-1, Takatsuki, Osaka 569-1094, Japan; (M.H.); (K.M.); (M.Y.); (M.K.); (C.N.); (Y.S.); (H.Y.); (S.H.)
| | - Shinya Harusawa
- Department of Pharmaceutical Organic Chemistry, Osaka University of Pharmaceutical Sciences, Nasahara 4-20-1, Takatsuki, Osaka 569-1094, Japan; (M.H.); (K.M.); (M.Y.); (M.K.); (C.N.); (Y.S.); (H.Y.); (S.H.)
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10
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Cristófalo AE, Nieto PM, Uhrig ML. Synthesis of (1→3) Thiodisaccharides of GlcNAc and the Serendipitous Formation of 2,3-Dideoxy-(1→2)-thiodisaccharides through a Vinyl Azide Intermediate. J Org Chem 2019; 85:306-317. [PMID: 31802661 DOI: 10.1021/acs.joc.9b01883] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The syntheses of β-S-GlcA(1→3)GlcNAc and β-S-Gal(1→3)GlcNAc thiodisaccharides, which can be considered mimetics of the repeating units of hyaluronan and keratan respectively, were achieved by SN2 displacement of a triflate group allocated at the 3-position of a convenient 2-azido-4,6-O-benzylidene-2-deoxy-β-d-allopyranose precursor by the corresponding nucleophilic suitable protected thioaldoses derived from glucuronic acid (GlcA) and galactose (Gal). The study of the reaction led to the finding that the vinyl azide formed by competitive E2 reaction of the mentioned triflate was an interesting precursor of a new kind of 2,3-dideoxy-2-azido-(1→2) thiodisaccharides through an addition reaction. Determination of the stereochemistry of the new stereocenter at C-2 was achieved by NOESY experiments. Final protecting group manipulation of the (1→3) thiodisaccharides led to a family of derivatives that could be used as building blocks for the synthesis of complex glycomimetics.
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Affiliation(s)
- Alejandro Ezequiel Cristófalo
- Departamento de Química Orgánica, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires , Ciudad Universitaria , Pabellón 2, C1428EGA Buenos Aires , Argentina.,CONICET-Universidad de Buenos Aires, Centro de Investigaciones en Hidratos de Carbono (CIHIDECAR) , C1428EGA Buenos Aires , Argentina
| | - Pedro M Nieto
- Glycosystems Laboratory, Instituto de Investigaciones Químicas (IIQ), cicCartuja , CSIC and Universidad de Sevilla , 41092 Sevilla , España
| | - María Laura Uhrig
- Departamento de Química Orgánica, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires , Ciudad Universitaria , Pabellón 2, C1428EGA Buenos Aires , Argentina.,CONICET-Universidad de Buenos Aires, Centro de Investigaciones en Hidratos de Carbono (CIHIDECAR) , C1428EGA Buenos Aires , Argentina
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