201
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Manabe S, Ishii K, Satoh H, Ito Y. Substituent effects in endocyclic cleavage–recyclization anomerization reaction of pyranosides. Tetrahedron 2011. [DOI: 10.1016/j.tet.2011.09.059] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
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202
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A potential glucuronate glycosyl donor with 2-O-acyl-6,3-lactone structure: efficient synthesis of glycosaminoglycan disaccharides. Tetrahedron Lett 2011. [DOI: 10.1016/j.tetlet.2011.08.024] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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203
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Ramesh D, Rajaram S, Prabhakar P, Ramulu U, Kumar Reddy D, Venkateswarlu Y. Asymmetric Total Synthesis of Stagonolide G. Helv Chim Acta 2011. [DOI: 10.1002/hlca.201000416] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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204
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Chen JB, Liu EM, Chern TR, Yang CW, Lin CI, Huang NK, Lin YL, Chern Y, Lin JH, Fang JM. Design and Synthesis of Novel Dual-Action Compounds Targeting the Adenosine A2A Receptor and Adenosine Transporter for Neuroprotection. ChemMedChem 2011; 6:1390-400. [DOI: 10.1002/cmdc.201100126] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2011] [Revised: 05/08/2011] [Indexed: 12/22/2022]
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205
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Meurillon M, Chaloin L, Périgaud C, Peyrottes S. Synthesis of Pyrimidine-Containing Nucleoside β-(R/S)-Hydroxyphosphonate Analogues. European J Org Chem 2011. [DOI: 10.1002/ejoc.201100219] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
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206
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Yadav J, Ramesh K, Subba Reddy U, Subba Reddy B, Ghamdi AAKA. The stereoselective total synthesis of (+)-18-(6S,9R,10R)-bovidic acid. Tetrahedron Lett 2011. [DOI: 10.1016/j.tetlet.2011.03.089] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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207
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Varizhuk A, Kochetkova S, Kolganova N, Timofeev E, Florentiev V. Oligonucleotide analogs with peptide internucleotide linkages. NUCLEOSIDES NUCLEOTIDES & NUCLEIC ACIDS 2011; 30:31-48. [PMID: 21259162 DOI: 10.1080/15257770.2010.542790] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
Oligonucleotide analogs containing one or a few glycine, L-, and D-alanine or L-and D-phenylalanine residues instead of phosphodiesterinternucleotide linkages were synthesized. The stability of the duplexes formed by modified oligonucleotides and their wildtype complements was studied. Oligonucleotides with D-alanine residues in internucleotide linkages form duplexes more stable than native ones (ΔT(m) +0.2 °C per modification), whereas other modifications destabilize the duplexes.
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Affiliation(s)
- Anna Varizhuk
- Engelhardt Institute of Molecular Biology, Moscow, Russian Federation
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208
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Volpini R, Marucci G, Buccioni M, Dal Ben D, Lambertucci C, Lammi C, Mishra RC, Thomas A, Cristalli G. Evidence for the existence of a specific g protein-coupled receptor activated by guanosine. ChemMedChem 2011; 6:1074-80. [PMID: 21500353 DOI: 10.1002/cmdc.201100100] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2011] [Revised: 03/11/2011] [Indexed: 11/10/2022]
Abstract
Guanosine, released extracellularly from neurons and glial cells, plays important roles in the central nervous system, including neuroprotection. The innovative DELFIA Eu-GTP binding assay was optimized for characterization of the putative guanosine receptor binding site at rat brain membranes by using a series of novel and known guanosine derivatives. These nucleosides were prepared by modifying the purine and sugar moieties of guanosine at the 6- and 5'-positions, respectively. Results of these experiments prove that guanosine, 6-thioguanosine, and their derivatives activate a G protein-coupled receptor that is different from the well-characterized adenosine receptors.
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Affiliation(s)
- Rosaria Volpini
- School of Pharmacy, Medicinal Chemistry Unit, University of Camerino via S. Agostino 1, 62032 Camerino, Italy
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209
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Yakura T, Ozono A. Novel 2,2,6,6-Tetramethylpiperidine 1-Oxyl-Iodobenzene Hybrid Catalyst for Oxidation of Primary Alcohols to Carboxylic Acids. Adv Synth Catal 2011. [DOI: 10.1002/adsc.201100024] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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210
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Baragaña B, McCarthy O, Sánchez P, Bosch-Navarrete C, Kaiser M, Brun R, Whittingham JL, Roberts SM, Zhou XX, Wilson KS, Johansson NG, González-Pacanowska D, Gilbert IH. β-Branched acyclic nucleoside analogues as inhibitors of Plasmodium falciparum dUTPase. Bioorg Med Chem 2011; 19:2378-91. [DOI: 10.1016/j.bmc.2011.02.012] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2010] [Revised: 02/06/2011] [Accepted: 02/09/2011] [Indexed: 10/18/2022]
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211
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Sarabia F, Chammaa S, García-Ruiz C. Solid Phase Synthesis of Globomycin and SF-1902 A5. J Org Chem 2011; 76:2132-44. [DOI: 10.1021/jo1025145] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Francisco Sarabia
- Department of Organic Chemistry, Faculty of Sciences, University of Malaga, Campus de Teatinos s/n 29071, Malaga, Spain
| | - Samy Chammaa
- Department of Organic Chemistry, Faculty of Sciences, University of Malaga, Campus de Teatinos s/n 29071, Malaga, Spain
| | - Cristina García-Ruiz
- Department of Organic Chemistry, Faculty of Sciences, University of Malaga, Campus de Teatinos s/n 29071, Malaga, Spain
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212
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Christina AE, van den Bos LJ, Overkleeft HS, van der Marel GA, Codée JDC. Galacturonic Acid Lactones in the Synthesis of All Trisaccharide Repeating Units of the Zwitterionic Polysaccharide Sp1. J Org Chem 2011; 76:1692-706. [DOI: 10.1021/jo102363d] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Alphert E. Christina
- Leiden Institute of Chemistry, Leiden University, P.O. Box 9502, 2300 RA Leiden, The Netherlands
| | - Leendert J. van den Bos
- Leiden Institute of Chemistry, Leiden University, P.O. Box 9502, 2300 RA Leiden, The Netherlands
| | - Herman S. Overkleeft
- Leiden Institute of Chemistry, Leiden University, P.O. Box 9502, 2300 RA Leiden, The Netherlands
| | | | - Jeroen D. C. Codée
- Leiden Institute of Chemistry, Leiden University, P.O. Box 9502, 2300 RA Leiden, The Netherlands
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213
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Huang TY, Zulueta MML, Hung SC. One-Pot Strategies for the Synthesis of the Tetrasaccharide Linkage Region of Proteoglycans. Org Lett 2011; 13:1506-9. [DOI: 10.1021/ol200192d] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Affiliation(s)
- Teng-Yi Huang
- Genomics Research Center, Academia Sinica, 128 Sec.2 Academia Road, Taipei 115, Taiwan, Department of Chemistry, National Tsing Hua University, 101 Sec. 2 Kuang-Fu Road, Hsinchu 300, Taiwan, and Department of Applied Chemistry, National Chiao Tung University, 1001 Ta-Hsueh Road, Hsinchu 300, Taiwan
| | - Medel Manuel L. Zulueta
- Genomics Research Center, Academia Sinica, 128 Sec.2 Academia Road, Taipei 115, Taiwan, Department of Chemistry, National Tsing Hua University, 101 Sec. 2 Kuang-Fu Road, Hsinchu 300, Taiwan, and Department of Applied Chemistry, National Chiao Tung University, 1001 Ta-Hsueh Road, Hsinchu 300, Taiwan
| | - Shang-Cheng Hung
- Genomics Research Center, Academia Sinica, 128 Sec.2 Academia Road, Taipei 115, Taiwan, Department of Chemistry, National Tsing Hua University, 101 Sec. 2 Kuang-Fu Road, Hsinchu 300, Taiwan, and Department of Applied Chemistry, National Chiao Tung University, 1001 Ta-Hsueh Road, Hsinchu 300, Taiwan
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214
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Adrio LA, Hii KKM. An Expedient Synthesis of Olfactory Lactones by Intramolecular Hydroacylalkoxylation Reactions. European J Org Chem 2011. [DOI: 10.1002/ejoc.201001556] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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215
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Buchs (née Levrand) B, Fieber W, Vigouroux-Elie F, Sreenivasachary N, Lehn JM, Herrmann A. Release of bioactive volatiles from supramolecular hydrogels: influence of reversible acylhydrazone formation on gel stability and volatile compound evaporation. Org Biomol Chem 2011; 9:2906-19. [DOI: 10.1039/c0ob01139h] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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216
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Cell-penetrating peptides modulate the vascular action of phenylephrine. Pharmacol Rep 2011; 63:195-9. [DOI: 10.1016/s1734-1140(11)70416-9] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2010] [Revised: 09/15/2010] [Indexed: 11/17/2022]
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217
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218
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Yadav JS, Reddy AS, Reddy CS, Reddy BVS, Saddanapu V, Addlagatta A. First Stereoselective Total Synthesis and Biological Evaluation of Amphidinin B and Its Analogues. European J Org Chem 2010. [DOI: 10.1002/ejoc.201001205] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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219
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Körner C, Raiber EA, Keegan SE, Nicolau DC, Sheppard TD, Tabor AB. An expedient synthesis of orthogonally protected lysinoalanine from Aloc-protected Garner’s aldehyde. Tetrahedron Lett 2010. [DOI: 10.1016/j.tetlet.2010.09.119] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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220
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Paterson I, Gibson LJ, Kan SBJ. Synthesis of the C15-C35 northern hemisphere subunit of the chivosazoles. Org Lett 2010; 12:5530-3. [PMID: 21043512 DOI: 10.1021/ol102425n] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
An advanced C15-C35 subunit of the chivosazole polyene macrolides was prepared in a convergent manner, exploiting boron-mediated aldol reactions for the stereocontrolled construction of the C15-C26 and C27-C35 segments, followed by their Pd/Cu-promoted Stille coupling to configure the signature (23E,25E,27Z)-triene motif. Correlation with a known C28-C35 degradation fragment of chivosazole A was also achieved.
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Affiliation(s)
- Ian Paterson
- University Chemical Laboratory, Lensfield Road, Cambridge, CB2 1EW, UK.
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221
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Dupouy C, Zhang C, Padilla A, Pochet S, Kaminski PA. Probing the active site of the deoxynucleotide N-hydrolase Rcl encoded by the rat gene c6orf108. J Biol Chem 2010; 285:41806-14. [PMID: 20962348 DOI: 10.1074/jbc.m110.181594] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Rcl is a potential anti-angiogenic therapeutic target that hydrolyzes the N-glycosidic bond of 2'-deoxyribonucleoside 5'-monophosphate, yielding 2-deoxyribose 5-phosphate and the corresponding base. Its recently elucidated solution structure provided the first insight into the molecular basis for the substrate recognition. To facilitate the development of potent and specific inhibitors of Rcl, the active site was probed by site-directed mutagenesis and by the use of substrate analogs. The nucleobase shows weak interactions with the protein, and the deoxyribose binding pocket includes the catalytic triad Tyr-13, Asp-69, and Glu-93 and the phosphate binding site Ser-87 and Ser-117. The phosphomimetic mutation of Ser-17 to Glu prevents substrate binding and, thus, abolishes the activity of Rcl. The synthetic ligand-based analysis of the Rcl binding site shows that substitutions at positions 2 and 6 of the nucleobase as well as large heterocycles are well tolerated. The phosphate group at position 5 of the (deoxy)ribose moiety is the critical binding determinant. This study provides the roadmap for the design of small molecules inhibitors with pharmacological properties.
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Affiliation(s)
- Christelle Dupouy
- Institut Pasteur, Unité de Chimie et Biocatalyse, 75724 Paris Cedex 15, France
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222
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Varizhuk AM, Kochetkova SV, Kolganova NA, Timofeev ÉN, Florent'ev VL. [Oligonucleotides with peptide internucleotide linkage. A novel class of modified oligonucleotides]. RUSSIAN JOURNAL OF BIOORGANIC CHEMISTRY 2010; 36:570-3. [PMID: 20823927 DOI: 10.1134/s1068162010040138] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Oligonucleotide analogues with replacement of one or more internucleotide phosphodiester linkages with glycine, L- and D-alanine residues have been synthesized (C3'-NH-C(O)-CH(X)-NH-C(O)-C4', X = H, (S)-CH3 and (R)-CH3). The stability of the duplexes formed by the modified oligonucleotides and their wild-type complements have been studied. Incorporation of glycine and L-alanine residues have been shown to substantially decrease the stability the modified duplexes in comparison with that of the wild-type ones (DeltaT(m) approximately -2 degrees C per modification), while the analogs with D-alanine-containing linkages appeared to form duplexes with increased stability (DeltaT(m), approximately +0.2 degrees C per modification).
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223
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Sarabia F, Martín-Gálvez F, Chammaa S, Martín-Ortiz L, Sánchez-Ruiz A. Chiral Sulfur Ylides for the Synthesis of Bengamide E and Analogues. J Org Chem 2010; 75:5526-32. [DOI: 10.1021/jo100696w] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Francisco Sarabia
- Department of Organic Chemistry, Faculty of Sciences, University of Malaga, Campus de Teatinos s/n 29071, Malaga, Spain
| | - Francisca Martín-Gálvez
- Department of Organic Chemistry, Faculty of Sciences, University of Malaga, Campus de Teatinos s/n 29071, Malaga, Spain
| | - Samy Chammaa
- Department of Organic Chemistry, Faculty of Sciences, University of Malaga, Campus de Teatinos s/n 29071, Malaga, Spain
| | - Laura Martín-Ortiz
- Department of Organic Chemistry, Faculty of Sciences, University of Malaga, Campus de Teatinos s/n 29071, Malaga, Spain
| | - Antonio Sánchez-Ruiz
- Department of Organic Chemistry, Faculty of Sciences, University of Malaga, Campus de Teatinos s/n 29071, Malaga, Spain
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224
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Mohapatra DK, Samad Hossain S, Dhara S, Yadav J. Application of desymmetrization protocol for the formal total synthesis of emericellamide B. Tetrahedron Lett 2010. [DOI: 10.1016/j.tetlet.2010.04.015] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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225
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Srihari P, Kumaraswamy B, Bhunia DC, Yadav J. First stereoselective total synthesis of stagonolide G. Tetrahedron Lett 2010. [DOI: 10.1016/j.tetlet.2010.03.102] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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226
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Cheshev P, Morelli L, Marchesi M, Podlipnik C, Bergström M, Bernardi A. Synthesis and affinity evaluation of a small library of bidentate cholera toxin ligands: towards nonhydrolyzable ganglioside mimics. Chemistry 2010; 16:1951-67. [PMID: 20039344 DOI: 10.1002/chem.200902469] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
A small library of nonhydrolyzable mimics of GM1 ganglioside, featuring galactose and sialic acid as pharmacophoric carbohydrate residues, was synthesized and tested. All compounds were synthesized from readily available precursors using high-performance reactions, including click chemistry protocols, and avoiding O-glycosidic bonds. Some of the most active molecules also feature a point of further derivatization that can be used for conjugation with polyvalent aglycons. Their affinity towards cholera toxin was assessed by weak affinity chromatography, which allowed a systematic evaluation and selection of the best candidates. Affinity could be enhanced up to one or two orders of magnitude over the affinity of the individual pharmacophoric sugar residues.
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Affiliation(s)
- Pavel Cheshev
- Dipartimento di Chimica Organica e Industriale, Università degli Studi di Milano via Venezian 21, 20133 Milano, Italy
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227
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Reddy GV, Kumar RSC, Sreedhar E, Babu KS, Rao JM. Stereoselective synthesis (+)-cephalosporolide D. Tetrahedron Lett 2010. [DOI: 10.1016/j.tetlet.2010.01.082] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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228
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Affiliation(s)
- Ying Jin
- Laboratory of Chemical Genomics, Peking University Shenzhen Graduate School, University Town of Shenzhen, Xili, Nanshan District, Shenzhen, China, 518055, and Department of Applied Biology & Chemical Technology, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, China
| | - Yuqing Liu
- Laboratory of Chemical Genomics, Peking University Shenzhen Graduate School, University Town of Shenzhen, Xili, Nanshan District, Shenzhen, China, 518055, and Department of Applied Biology & Chemical Technology, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, China
| | - Zhuo Wang
- Laboratory of Chemical Genomics, Peking University Shenzhen Graduate School, University Town of Shenzhen, Xili, Nanshan District, Shenzhen, China, 518055, and Department of Applied Biology & Chemical Technology, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, China
| | - Shuqin Kwong
- Laboratory of Chemical Genomics, Peking University Shenzhen Graduate School, University Town of Shenzhen, Xili, Nanshan District, Shenzhen, China, 518055, and Department of Applied Biology & Chemical Technology, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, China
| | - Zhengshuang Xu
- Laboratory of Chemical Genomics, Peking University Shenzhen Graduate School, University Town of Shenzhen, Xili, Nanshan District, Shenzhen, China, 518055, and Department of Applied Biology & Chemical Technology, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, China
| | - Tao Ye
- Laboratory of Chemical Genomics, Peking University Shenzhen Graduate School, University Town of Shenzhen, Xili, Nanshan District, Shenzhen, China, 518055, and Department of Applied Biology & Chemical Technology, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, China
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229
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230
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Chandrasekhar S, Pavankumarreddy G, Sathish K. Total synthesis of arenamide A and its diastereomer. Tetrahedron Lett 2009. [DOI: 10.1016/j.tetlet.2009.09.119] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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231
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232
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Mei ZW, Ma LJ, Kawafuchi H, Okihara T, Inokuchi T. TEMPO-Mediated Oxidation of Primary Alcohols to Carboxylic Acids by Exploitation of Ethers in an Aqueous–Organic Biphase System. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2009. [DOI: 10.1246/bcsj.82.1000] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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233
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Yadav J, Bezawada P, Chenna V. Formal total synthesis of borrelidin: synthesis of C1–C11 fragment via desymmetrization strategy. Tetrahedron Lett 2009. [DOI: 10.1016/j.tetlet.2009.03.196] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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234
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Affiliation(s)
- J. S. Yadav
- Organic Chemistry Division I, Indian Institute of Chemical Technology, Hyderabad 500607, India
| | - Ch. Suresh Reddy
- Organic Chemistry Division I, Indian Institute of Chemical Technology, Hyderabad 500607, India
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235
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Chandrasekhar S, Rao CL, Seenaiah M, Naresh P, Jagadeesh B, Manjeera D, Sarkar A, Bhadra MP. Total synthesis of azumamide E and sugar amino acid-containing analogue. J Org Chem 2009; 74:401-4. [PMID: 19053574 DOI: 10.1021/jo8020264] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
An efficient and practical total synthesis of marine cyclic tetrapeptide, natural product azumamide E (1) is achieved via high-yielding reactions. The strategy also allowed us to synthesize the azumamide E-SAA (sugar amino acid) analogue (2), whose solution-phase NMR and biological activity studies were also carried out.
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Affiliation(s)
- Srivari Chandrasekhar
- Organic Division-I, Indian Institute of Chemical Technology, Hyderabad, India 500 607.
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236
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Shibuya M, Sato T, Tomizawa M, Iwabuchi Y. Oxoammonium salt/NaClO2: an expedient, catalytic system for one-pot oxidation of primary alcohols to carboxylic acids with broad substrate applicability. Chem Commun (Camb) 2009:1739-41. [PMID: 19294280 DOI: 10.1039/b822944a] [Citation(s) in RCA: 80] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A facile, green, one-pot oxidation of primary alcohols to carboxylic acids with broad substrate applicability has been developed by employing an expedient catalytic system consisting of 1-Me-AZADO+X-/NaClO2.
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Affiliation(s)
- Masatoshi Shibuya
- Department of Organic Chemistry, Graduate School of Pharmaceutical Sciences, Tohoku University, 6-3 Aobayama, Sendai, 980-8578, Japan
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237
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Chen J, Zhou Y, Chen C, Xu W, Yu B. Synthesis of a tetrasaccharide substrate of heparanase. Carbohydr Res 2008; 343:2853-62. [DOI: 10.1016/j.carres.2008.06.011] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2008] [Revised: 06/08/2008] [Accepted: 06/11/2008] [Indexed: 11/27/2022]
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238
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Studies on the synthesis of neamine-dinucleosides and neamine-PNA conjugates and their interaction with RNA. Bioorg Med Chem Lett 2008; 18:5355-8. [PMID: 18829307 DOI: 10.1016/j.bmcl.2008.09.062] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2008] [Revised: 09/13/2008] [Accepted: 09/16/2008] [Indexed: 11/20/2022]
Abstract
Two types of neamine derivatives, neamine-dinucleotide conjugates 8a-g and neamine-PNA conjugates 12a-c and 14a-d, were synthesized. Compound 8a-g were synthesized by the condensation of azido-neamine with dinucleotide-5'-carboxylic acids, followed by reduction and deprotection. Compound 12a-c and 14a-d were synthesized by the similar strategy. The binding affinities of conjugates 8a-g, 12a-c, and 14a-d towards 16S RNA, 18S RNA, and TAR RNA were evaluated by SPR. It indicates that conjugates 12a-c and 14a-d interact with 16S, 18S RNA at the same level as that of neamine, 14a and 14d show about twofold binding affinities to TAR RNA compared to that of neamine. However, the neamine-dinucleotide conjugates 8a-g exhibit very weak binding affinities to 16S, 18S, and TAR RNA, computer modelling results that negative-negative electrostatic repulsion of phosphate group in compound 8a-g and RNA leads to a sharp decrease of the binding affinities compared with that of neamine, neamine-nucleoside and neamine-PNA conjugates.
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239
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Katoh N, Nakahata T, Kuwahara S. Synthesis of novel antifungal phthalides produced by a wheat rhizosphere fungus. Tetrahedron 2008. [DOI: 10.1016/j.tet.2008.07.023] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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240
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Brunschweiger A, Iqbal J, Umbach F, Scheiff AB, Munkonda MN, Sévigny J, Knowles AF, Müller CE. Selective nucleoside triphosphate diphosphohydrolase-2 (NTPDase2) inhibitors: nucleotide mimetics derived from uridine-5'-carboxamide. J Med Chem 2008; 51:4518-28. [PMID: 18630897 DOI: 10.1021/jm800175e] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Ecto-nucleoside triphosphate diphosphohydrolases (E-NTPDases, subtypes 1, 2, 3, 8 of NTPDases) dephosphorylate nucleoside tri- and diphosphates to the corresponding di- and monophosphates. In the present study we synthesized adenine and uracil nucleotide mimetics, in which the phosphate residues were replaced by phosphonic acid esters attached to the nucleoside at the 5'-position by amide linkers. Among the synthesized uridine derivatives, we identified the first potent and selective inhibitors of human NTPDase2. The most potent compound was 19a (PSB-6426), which was a competitive inhibitor of NTPDase2 exhibiting a K i value of 8.2 microM and selectivity versus other NTPDases. It was inactive toward uracil nucleotide-activated P2Y 2, P2Y 4, and P2Y 6 receptor subtypes. Compound 19a was chemically and metabolically highly stable. In contrast to the few known (unselective) NTPDase inhibitors, 19a is an uncharged molecule and may be perorally bioavailable. NTPDase2 inhibitors have potential as novel cardioprotective drugs for the treatment of stroke and for cancer therapy.
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Affiliation(s)
- Andreas Brunschweiger
- PharmaCenter Bonn, Pharmaceutical Institute, Pharmaceutical Chemistry I, Pharmaceutical Sciences Bonn, University of Bonn, An der Immenburg 4, D-53121 Bonn, Germany
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241
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Miyaoka H, Yamanishi M, Hoshino A, Mitome H, Kawashima E. Practical synthesis of a key intermediate for lactacystin from (R)-4-hydroxymethyl-2-phenyl-4,5-dihydrooxazol-4-ylmethyl acetate. Chem Pharm Bull (Tokyo) 2008; 56:738-41. [PMID: 18451571 DOI: 10.1248/cpb.56.738] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
A practical synthesis of a key intermediate for the proteasome inhibitor lactacystin from (R)-4-hydroxymethyl-2-phenyl-4,5-dihydrooxazol-4-ylmethyl acetate was established. (R)-4-Hydroxymethyl-2-phenyl-4,5-dihydrooxazol-4-ylmethyl acetate is a useful chiral building block for the synthesis of biologically active compounds containing alpha-substituted alpha-amino acid moieties.
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Affiliation(s)
- Hiroaki Miyaoka
- School of Pharmacy, Tokyo University of Pharmacy and Life Sciences, Hachioji, Tokyo, Japan.
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242
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Chandrasekhar S, Pavan Kumar Reddy G, Udaya Kiran M, Nagesh C, Jagadeesh B. Nucleoside derived amino acids (NDA) in foldamer chemistry: synthesis and conformational studies of homooligomers of modified AZT. Tetrahedron Lett 2008. [DOI: 10.1016/j.tetlet.2008.03.001] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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243
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Threlfall R, Davies A, Howarth N, Cosstick R. Foldamers derived from nucleoside beta-amino acids: PNA Or DNA? Can we have both in one place? NUCLEOSIDES NUCLEOTIDES & NUCLEIC ACIDS 2008; 26:611-4. [PMID: 18066865 DOI: 10.1080/15257770701490399] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Abstract
The synthesis of a modified thymidine (nucleoside beta-amino acid) monomer and preliminary investigations into the solid phase peptide synthesis of PNA/DNA chimeras containing a neutral, internucleoside amide linkage are described.
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Affiliation(s)
- Richard Threlfall
- Department of Chemistry, University of Liverpool, Liverpool, United Kingdom.
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244
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Devine SM, Scammells PJ. An efficient convergent synthesis of adenosine-5′-N-alkyluronamides. Tetrahedron 2008. [DOI: 10.1016/j.tet.2007.11.100] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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245
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Sreenivasachary N, Lehn JM. Structural Selection in G-Quartet-Based Hydrogels and Controlled Release of Bioactive Molecules. Chem Asian J 2008; 3:134-9. [DOI: 10.1002/asia.200700041] [Citation(s) in RCA: 70] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
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246
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Threlfall R, Davies A, Howarth NM, Fisher J, Cosstick R. Peptides derived from nucleoside β-amino acids form an unusual 8-helix. Chem Commun (Camb) 2008:585-7. [DOI: 10.1039/b714350h] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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247
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Gogoi K, Kumar VA. Chimeric (α-amino acid + nucleoside-β-amino acid)npeptide oligomers show sequence specific DNA/RNA recognition. Chem Commun (Camb) 2008:706-8. [DOI: 10.1039/b716835g] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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248
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Xu R, Jiang ZH. Synthesis of β-(1→4)-oligo-d-mannuronic acid neoglycolipids. Carbohydr Res 2008; 343:7-17. [DOI: 10.1016/j.carres.2007.10.007] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2007] [Revised: 10/05/2007] [Accepted: 10/11/2007] [Indexed: 11/24/2022]
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249
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van den Bos LJ, Codée JDC, Litjens REJN, Dinkelaar J, Overkleeft HS, van der Marel GA. Uronic Acids in Oligosaccharide Synthesis. European J Org Chem 2007. [DOI: 10.1002/ejoc.200700101] [Citation(s) in RCA: 68] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Leendert J. van den Bos
- Leiden Institute of Chemistry, Leiden University, P. O. Box 9502, 2300 RA Leiden, The Netherlands
| | - Jeroen D. C. Codée
- Leiden Institute of Chemistry, Leiden University, P. O. Box 9502, 2300 RA Leiden, The Netherlands
| | - Remy E. J. N. Litjens
- Leiden Institute of Chemistry, Leiden University, P. O. Box 9502, 2300 RA Leiden, The Netherlands
| | - Jasper Dinkelaar
- Leiden Institute of Chemistry, Leiden University, P. O. Box 9502, 2300 RA Leiden, The Netherlands
| | - Herman S. Overkleeft
- Leiden Institute of Chemistry, Leiden University, P. O. Box 9502, 2300 RA Leiden, The Netherlands
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250
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Mackman RL, Zhang L, Prasad V, Boojamra CG, Douglas J, Grant D, Hui H, Kim CU, Laflamme G, Parrish J, Stoycheva AD, Swaminathan S, Wang K, Cihlar T. Synthesis, anti-HIV activity, and resistance profile of thymidine phosphonomethoxy nucleosides and their bis-isopropyloxymethylcarbonyl (bisPOC) prodrugs. Bioorg Med Chem 2007; 15:5519-28. [PMID: 17562366 DOI: 10.1016/j.bmc.2007.05.047] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2007] [Revised: 05/17/2007] [Accepted: 05/18/2007] [Indexed: 11/15/2022]
Abstract
Phosphonomethoxy nucleoside analogs of the thymine containing nucleoside reverse transcriptase inhibitors (NRTIs), 3'-azido-2',3'-dideoxythymidine (AZT), 2',3'-didehydro-2',3'-dideoxythymidine (d4T), and 2',3'-dideoxythymidine (ddT), were synthesized. The anti-HIV activity against wild-type and several major nucleoside-resistant strains of HIV-1 was evaluated together with the inhibition of wild-type HIV reverse transcriptase (RT). Phosphonomethoxy analog of d4T, 8 (d4TP), demonstrated antiviral activity with an EC(50) value of 26 microM, whereas, phosphonomethoxy analogs of ddT, 7 (ddTP), and AZT, 6 (AZTP), were both inactive at concentrations up to 200 microM. Bis-isopropyloxymethylcarbonyl (bisPOC) prodrugs improved the anti-HIV activity of 7 and 8 by >150-fold and 29-fold, respectively, allowing for antiviral resistance to be determined. The K65R RT mutant virus was more resistant to the bisPOC prodrugs of 7 and 8 than bisPOC PMPA (tenofovir DF) 1. However, bisPOC prodrug of 7 demonstrated superior resistance toward the RT virus containing multiple thymidine analog mutations (6TAMs) indicating that new phosphonate nucleoside analogs may be suitable for targeting clinically relevant nucleoside resistant HIV-1 strains.
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Affiliation(s)
- Richard L Mackman
- Gilead Sciences, Inc., 333 Lakeside Drive, Foster City, CA 94404, USA.
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