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Ota T, Saburi W, Komba S, Mori H. Chemical synthesis of oligosaccharide derivatives with partial structure of β1-3/1-6 glucan, using monomeric units for the formation of β1-3 and β1-6 glucosidic linkages. Biosci Biotechnol Biochem 2023; 87:1111-1121. [PMID: 37407435 DOI: 10.1093/bbb/zbad093] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2023] [Accepted: 06/29/2023] [Indexed: 07/07/2023]
Abstract
β1-3/1-6 Glucans, known for their diverse structures, comprise a β1-3-linked main chain and β1-6-linked short branches. Laminarin, a β1-3/1-6 glucan extracted from brown seaweed, for instance, includes β1-6 linkages even in the main chain. The diverse structures provide various beneficial functions for the glucan. To investigate the relationship between structure and functionality, and to enable the characterization of β1-3/1-6 glucan-metabolizing enzymes, oligosaccharides containing the exact structures of β1-3/1-6 glucans are required. We synthesized the monomeric units for the synthesis of β1-3/1-6 mixed-linked glucooligosaccharides. 2-(Trimethylsilyl)ethyl 2-O-benzoyl-4,6-O-benzylidene-β-d-glucopyranoside served as an acceptor in the formation of β1-3 linkages. Phenyl 2-O-benzoyl-4,6-O-benzylidene-3-O-(tert-butyldiphenylsilyl)-1-thio-β-d-glucopyranoside and phenyl 2,3-di-O-benzoyl-4,6-di-O-levulinyl-1-thio-β-d-glucopyranoside acted as donors, synthesizing acceptors suitable for the formation of β1-3- and β1-6-linkages, respectively. These were used to synthesize a derivative of Glcβ1-6Glcβ1-3Glcβ1-3Glc, demonstrating that the proposed route can be applied to synthesize the main chain of β-glucan, with the inclusion of both β1-3 and β1-6 linkages.
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Affiliation(s)
- Tomoya Ota
- Research Faculty of Agriculture, Hokkaido University, Sapporo, Japan
| | - Wataru Saburi
- Research Faculty of Agriculture, Hokkaido University, Sapporo, Japan
| | - Shiro Komba
- Institute of Food Research, National Agriculture and Food Research Organization, Tsukuba, Japan
| | - Haruhide Mori
- Research Faculty of Agriculture, Hokkaido University, Sapporo, Japan
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2
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Ślepokura KA. Reversiblechair↔skewconformational interconversion of 1,3,2-dioxaphosphorinane ring in the solid state. ACTA CRYSTALLOGRAPHICA SECTION B-STRUCTURAL SCIENCE CRYSTAL ENGINEERING AND MATERIALS 2016; 72:117-25. [DOI: 10.1107/s2052520615020259] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/03/2015] [Accepted: 10/26/2015] [Indexed: 11/10/2022]
Abstract
β-NH4[(MeO)2cDHAP] (where cDHAP is cyclic dihydroxyacetone phosphate) has been investigated by X-ray crystallography in the temperature range 350–100 K. Three reversible single-crystal-to-single-crystal phase transitions have been examined and four phases (high-, room-, medium- and low-temperature phase, HTP, RTP, MTP and LTP, respectively) have been structurally determined: HTP (at 350 K,P21/a,Z= 24), RTP (290 K, P \overline{1},Z= 12), MTP (205 K,P21/a,Z= 4) and LTP (100 K, P \overline{1},Z= 24). Various puckering modes of the 1,3,2-dioxaphosphorinane ring of the organic cyclic phosphate anion have been revealed in the crystal:chairandskew. Thechair↔skewring flipping, which has been shown to take place during the phase transitions, results in various populations ofskewandchairconformers in different phases. The flexibility in the coordination geometry of ammonium cations is considered to assist in the conformational flexibility of the dioxaphosphorinane ring.
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3
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Sartillo-Piscil F, Quintero L, Cruz-Gregorio S, Espinosa-Aguirre J, Elinos-Baez CM, Höpfl H, Serrano A. Further Evidence on the Favorable Role of the Anomeric Effect on the Cleavage of HepDirect and Cyclophosphamide Prodrugs. J Org Chem 2014; 79:9647-54. [DOI: 10.1021/jo501772g] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Fernando Sartillo-Piscil
- Centro
de Investigación de la Facultad de Ciencias Químicas, BUAP (Benemérita Universidad Autónoma de Puebla), 14 Sur Esq.
San Claudio, San Manuel, 72570 Puebla, Mexico
| | - Leticia Quintero
- Centro
de Investigación de la Facultad de Ciencias Químicas, BUAP (Benemérita Universidad Autónoma de Puebla), 14 Sur Esq.
San Claudio, San Manuel, 72570 Puebla, Mexico
| | - Silvano Cruz-Gregorio
- Centro
de Investigación de la Facultad de Ciencias Químicas, BUAP (Benemérita Universidad Autónoma de Puebla), 14 Sur Esq.
San Claudio, San Manuel, 72570 Puebla, Mexico
| | - Javier Espinosa-Aguirre
- Departamento
de Medicina Genómica y Toxicología Ambiental del Instituto
de Investigaciones Biomédicas, Universidad Nacional Autónoma de México, Distrito Federal, 04510 Mexico
City, Mexico
| | - Carmen M. Elinos-Baez
- Departamento
de Medicina Genómica y Toxicología Ambiental del Instituto
de Investigaciones Biomédicas, Universidad Nacional Autónoma de México, Distrito Federal, 04510 Mexico
City, Mexico
| | - Herbert Höpfl
- Centro
de Investigaciones Químicas de la Universidad Autónoma del Estado de Morelos, Avenida Universidad 1001, 62209 Cuernavaca, Mexico
| | - Abel Serrano
- Centro
de Investigación de la Facultad de Ciencias Químicas, BUAP (Benemérita Universidad Autónoma de Puebla), 14 Sur Esq.
San Claudio, San Manuel, 72570 Puebla, Mexico
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4
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Ślepokura K. Preparation and structural characterization of cDHAP—cyclic form of dihydroxyacetone phosphate—revealing chair and skew conformations of 1,3,2-dioxaphosphorinane ring. Carbohydr Res 2013; 368:96-103. [DOI: 10.1016/j.carres.2012.12.020] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2012] [Revised: 12/16/2012] [Accepted: 12/20/2012] [Indexed: 10/27/2022]
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5
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Conformational and configurational study of 2-phenyl-4-aryl-1,3,2-dioxaphosphonates derived from xylofuranose derivatives. The anomeric effect in the spontaneous isomerization of cyclic phosphonates. Tetrahedron Lett 2012. [DOI: 10.1016/j.tetlet.2012.06.103] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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6
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Du J, Bao D, Chun BK, Jiang Y, Reddy PG, Zhang HR, Ross BS, Bansal S, Bao H, Espiritu C, Lam AM, Murakami E, Niu C, Micolochick Steuer HM, Furman PA, Otto MJ, Sofia MJ. β-D-2'-α-F-2'-β-C-Methyl-6-O-substituted 3',5'-cyclic phosphate nucleotide prodrugs as inhibitors of hepatitis C virus replication: a structure-activity relationship study. Bioorg Med Chem Lett 2012; 22:5924-9. [PMID: 22892115 DOI: 10.1016/j.bmcl.2012.07.066] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2012] [Revised: 07/13/2012] [Accepted: 07/17/2012] [Indexed: 11/26/2022]
Abstract
The 3',5'-cyclic phosphate prodrug 9-[β-d-2'-deoxy-2'-α-fluoro-2'-β-C-methylribofuranosyl]-2-amino-6-ethoxypurine, PSI-352938 1, has demonstrated promising anti-HCV efficacy in vitro and in human clinical trials. A structure-activity relationship study of the nucleoside 3',5'-cyclic phosphate series of β-d-2'-deoxy-2'-α-fluoro-2'-β-C-methylribofuranosyl nucleoside prodrugs was undertaken and the anti-HCV activity and in vitro safety profile were assessed. Cycloalkyl 3',5'-cyclic phosphate prodrugs were shown to be significantly more potent as inhibitors of HCV replication than branched and straight chain alkyl 3',5'-cyclic phosphate prodrugs. No cytotoxicity and mitochondrial toxicity for prodrugs 12, 13 and 19 were observed at concentrations up to 100 μm in vitro. Cycloalkyl esters of 3',5'-cyclic phosphate nucleotide prodrugs demonstrated the ability to produce high levels of active triphosphate in clone-A cells and primary human hepatocytes. Compounds 12, 13 and 19 also demonstrated the ability to effectively deliver in vivo high levels of active nucleoside phosphates to rat liver.
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Affiliation(s)
- Jinfa Du
- Pharmasset, Inc., Princeton 303A College Road East, Princeton, NJ 08540, USA.
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Reddy PG, Chun BK, Zhang HR, Rachakonda S, Ross BS, Sofia MJ. Stereoselective Synthesis of PSI-352938: A β-d-2′-Deoxy-2′-α-fluoro-2′-β-C-methyl-3′,5′-cyclic Phosphate Nucleotide Prodrug for the Treatment of HCV. J Org Chem 2011; 76:3782-90. [DOI: 10.1021/jo200060f] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- P. Ganapati Reddy
- Pharmasset, Inc., 303A College Road East, Princeton, New Jersey 08540, United States
| | - Byoung-Kwon Chun
- Pharmasset, Inc., 303A College Road East, Princeton, New Jersey 08540, United States
| | - Hai-Ren Zhang
- Pharmasset, Inc., 303A College Road East, Princeton, New Jersey 08540, United States
| | - Suguna Rachakonda
- Pharmasset, Inc., 303A College Road East, Princeton, New Jersey 08540, United States
| | - Bruce S. Ross
- Pharmasset, Inc., 303A College Road East, Princeton, New Jersey 08540, United States
| | - Michael J. Sofia
- Pharmasset, Inc., 303A College Road East, Princeton, New Jersey 08540, United States
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Quintero L, Sánchez-Vazquez M, Cruz-Gregorio S, Sartillo-Piscil F. On the existence of the chair conformation in six-membered ring phosphates bearing an aryl group axially oriented at the C4 position: cyclic nucleotides as model compounds for cyclic phosph(on)ate and phosphoramide prodrugs. J Org Chem 2010; 75:5852-9. [PMID: 20698556 DOI: 10.1021/jo100863n] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A series of cyclic nucleotide analogues to HepDirect prodrugs were prepared by a three-component reaction of protected thymine, phosphoryl chloride, and 5-aryl-alpha-D-xylofuranoses derivatives. One of the cyclic nucleotides showed NMR data that suggest a predominant twisted conformation; however, in spite of having an aryl group at the C4 position within the crystal lattice, the cyclic nucleotide had a chair conformation with the aryl group axially oriented. By analyzing the unprecedented X-ray structure, it was observed that the oxygen atom from the phoshoryl group (P=O) is found in close proximity to the o-hydrogen atom of the aryl group (2.51 A), suggesting thus an attractive nonbonding electrostatic interaction, which might be the driving force that overcomes the steric diaxial interactions imposed by the aryl group. Theoretical studies (NBO) for two model compounds showed that there are indeed interactions between filled (donor) Lewis-type NBOs and empty (acceptor) non-Lewis NBOs corresponding to the nO-->sigma*(C-H) interaction. Additionally, conversion of a diastereomeric mixture of cyclic nucleotides into the more stable diastereomeric cyclic nucleotide was observed and explained by spontaneous isomerization in the phosphorinane ring. This finding supports the recently established hypothesis for the mode of action of prodrug cleavage, for which the anomeric effect plays an important role.
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Affiliation(s)
- Leticia Quintero
- Centro de Investigación de la Facultad de Ciencias Químicas, BUAP. 14 Sur Esq. San Claudio, San Manuel. 72570, Puebla, México
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9
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Reddy PG, Bao D, Chang W, Chun BK, Du J, Nagarathnam D, Rachakonda S, Ross BS, Zhang HR, Bansal S, Espiritu CL, Keilman M, Lam AM, Niu C, Steuer HM, Furman PA, Otto MJ, Sofia MJ. 2'-deoxy-2'-α-fluoro-2'-β-C-methyl 3',5'-cyclic phosphate nucleotide prodrug analogs as inhibitors of HCV NS5B polymerase: discovery of PSI-352938. Bioorg Med Chem Lett 2010; 20:7376-80. [PMID: 21050754 DOI: 10.1016/j.bmcl.2010.10.035] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2010] [Revised: 10/06/2010] [Accepted: 10/08/2010] [Indexed: 11/28/2022]
Abstract
A series of novel 2'-deoxy-2'-α-fluoro-2'-β-C-methyl 3',5'-cyclic phosphate nucleotide prodrug analogs were synthesized and evaluated for their in vitro anti-HCV activity and safety. These prodrugs demonstrated a 10-100-fold greater potency than the parent nucleoside in a cell-based replicon assay due to higher cellular triphosphate levels. Our structure-activity relationship (SAR) studies provided compounds that gave high levels of active triphosphate in rat liver when administered orally to rats. These studies ultimately led to the selection of the clinical development candidate 24a (PSI-352938).
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Affiliation(s)
- P Ganapati Reddy
- Pharmasset, Inc., 303A College Road East, Princeton, NJ 08540, USA.
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Ramirez E, Sánchez M, Meza-León RL, Quintero L, Sartillo-Piscil F. Selective Wittig olefination in aqueous media for the rapid preparation of unsaturated 7,3-lactone-α-d-xylofuranose derivatives. Tetrahedron Lett 2010. [DOI: 10.1016/j.tetlet.2010.02.094] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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11
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Gual A, Godard C, Castillón S, Claver C. Highly Efficient Rhodium Catalysts for the Asymmetric Hydroformylation of Vinyl and Allyl Ethers usingC1-Symmetrical Diphosphite Ligands. Adv Synth Catal 2010. [DOI: 10.1002/adsc.200900608] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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12
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Gual A, Godard C, Claver C, Castillón S. C1-Symmetric Diphosphite Ligands Derived from Carbohydrates: Influence of Structural Modifications on the Rhodium-Catalyzed Asymmetric Hydroformylation of Styrene. European J Org Chem 2009. [DOI: 10.1002/ejoc.200801093] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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13
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Cruz-Gregorio S, Rodriguez-Palacios V, Höpfl H, Quintero L, Sartillo-Piscil F. Six-Membered Ring Phosphates and Phosphonates As Model Compounds for Cyclic Phosphate Prodrugs: Is the Anomeric Effect Involved in the Selective and Spontaneous Cleavage of Cyclic Phosphate Prodrugs? J Org Chem 2008; 74:197-205. [DOI: 10.1021/jo8017473] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Silvano Cruz-Gregorio
- Centro de Investigación de la Facultad de Ciencias Químicas, BUAP, 14 Sur Esq. San Claudio, San Manuel, 72570, Puebla, México, and Centro de Investigaciones Químicas, Universidad Autónoma del Estado de Morelos, Avenida Universidad 1001, 62209, Cuernavaca, México
| | - Vicente Rodriguez-Palacios
- Centro de Investigación de la Facultad de Ciencias Químicas, BUAP, 14 Sur Esq. San Claudio, San Manuel, 72570, Puebla, México, and Centro de Investigaciones Químicas, Universidad Autónoma del Estado de Morelos, Avenida Universidad 1001, 62209, Cuernavaca, México
| | - Herbert Höpfl
- Centro de Investigación de la Facultad de Ciencias Químicas, BUAP, 14 Sur Esq. San Claudio, San Manuel, 72570, Puebla, México, and Centro de Investigaciones Químicas, Universidad Autónoma del Estado de Morelos, Avenida Universidad 1001, 62209, Cuernavaca, México
| | - Leticia Quintero
- Centro de Investigación de la Facultad de Ciencias Químicas, BUAP, 14 Sur Esq. San Claudio, San Manuel, 72570, Puebla, México, and Centro de Investigaciones Químicas, Universidad Autónoma del Estado de Morelos, Avenida Universidad 1001, 62209, Cuernavaca, México
| | - Fernando Sartillo-Piscil
- Centro de Investigación de la Facultad de Ciencias Químicas, BUAP, 14 Sur Esq. San Claudio, San Manuel, 72570, Puebla, México, and Centro de Investigaciones Químicas, Universidad Autónoma del Estado de Morelos, Avenida Universidad 1001, 62209, Cuernavaca, México
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14
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Synthesis and conformational study ofP-heterocyclic androst-5-ene derivatives. HETEROATOM CHEMISTRY 2008. [DOI: 10.1002/hc.20372] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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15
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Frank E, Körtvélyesi T, Czugler M, Mucsi Z, Keglevich G. New steroid-fused P-heterocycles. Part I. Synthesis and conformational study of dioxaphosphorino[16,17-d]estrone derivatives. Steroids 2007; 72:437-45. [PMID: 17383699 DOI: 10.1016/j.steroids.2007.02.002] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/20/2006] [Revised: 01/19/2007] [Accepted: 02/02/2007] [Indexed: 10/23/2022]
Abstract
D-ring-fused dioxaphosphorinanes (4-6) in the estrone series were synthetized as epimeric pairs and investigated by NMR and computational methods in order to determine their stereostructures and predominant conformations. The study was performed to evaluate the influence of the rigid sterane framework on the geometry of the condensed hetero ring, with regard to the possible steric effect of the angular methyl group at position 13. Additionally, the steric and electronic effects of the P-substituents on the conformational equilibrium were examined. The distorted-boat conformation of the hetero ring of dioxaphosphorinoestrone 3-methyl ether 4a was confirmed by single-crystal X-ray analysis. This is in good agreement with the observation in solution that, in the case of the boat conformation, the anisotropic shielding effect of the phenyl group of cyclic phosphonate 4a generates an upfield shift for 17-H, as compared with the corresponding chemical shift for epimer 4b. A similar boat conformation was substantiated for derivatives 4b, 5a, 5b and 6b on the basis of the J(H, H) and J(H, P) coupling constants and also ab initio calculations, regardless of the P-configuration. At the same time, the hetero ring of 6a seems to tilt towards a chair-like conformation due to the strong equatorial preference of the N-bis(2-chloroethyl) group.
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Affiliation(s)
- Eva Frank
- Department of Organic Chemistry, University of Szeged, Dóm tér 8., H-6720 Szeged, Hungary.
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Romero M, Hernández L, Quintero L, Sartillo-Piscil F. Nucleophilic substitution at the anomeric position of 1,2-O-isopropylidenefuranose derivatives. A novel stereoselective synthesis of cyclic phosphates analogous to cAMP. Carbohydr Res 2006; 341:2883-90. [PMID: 17087924 DOI: 10.1016/j.carres.2006.10.015] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2006] [Revised: 09/08/2006] [Accepted: 10/13/2006] [Indexed: 11/19/2022]
Abstract
1,2-O-Isopropylidenefuranose derivatives were treated with various nucleophiles in the presence of either BF(3).OEt(2) or trimethylsilyl trifluoromethanesulfonate (TMSOTf) leading to substitution products in a regio- and stereoselective manner. In particular, nucleophilic substitution of 1,2-O-isopropylidenefuranose derivatives when treated with allyltrimethylsilane was controlled by steric and electronic factors (similar to Woerpel's stereoelectronic model). On the other hand, when 1,2-O-isopropylidenefuranose derivatives were treated with trimethylsilane, in the presence of bis-O-trimethylsilyl-5-iodouracil or bis-O-trimethylsilyl-thymidine, substitution products were generated in high regio- and stereoselectivities via an unusual nucleophilic substitution with opening of the furanose ring. Based on these results, a stereoselective method for the synthesis of neutral cyclic phosphates analogous to cAMP was developed.
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Affiliation(s)
- Miriam Romero
- Centro de Investigación de la Facultad de Ciencias Químicas, Benemérita Universidad Autónoma de Puebla, 14 Sur Esq. San Claudio, Col. San Manuel, 72570 Puebla, Mexico
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