251
|
Soengas RG, Simone MI, Hunter S, Nash RJ, Evinson EL, Fleet GWJ. Hydroxymethyl-Branched Piperidines from Hydroxymethyl-Branched Lactones: Synthesis and Biological Evaluation of 1,5-Dideoxy-2-C-hydroxymethyl-1,5-imino-D-mannitol, 1,5-Dideoxy-2-C-hydroxymethyl-1,5-imino-L-gulitol and 1,5-Dideoxy-2-C-hydroxymethyl-1,5-imi. European J Org Chem 2012. [DOI: 10.1002/ejoc.201200054] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
|
252
|
Hu H, Liu Y, Zhong H, Zhu Y, Wang C, Ji M. Heck-Type Cross-Dehydrogenative Coupling Reactions of Indolizines at the 3-Position with Electron-Deficient Alkenes through Palladium-Catalyzed CH Activation. Chem Asian J 2012; 7:884-8. [DOI: 10.1002/asia.201101050] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2011] [Indexed: 01/04/2023]
|
253
|
Simone MI, Soengas RG, Jenkinson SF, Evinson EL, Nash RJ, Fleet GW. Synthesis of three branched iminosugars [(3R,4R,5S)-3-(hydroxymethyl)piperidine-3,4,5-triol, (3R,4R,5R)-3-(hydroxymethyl)piperidine-3,4,5-triol and (3S,4R,5R)-3-(hydroxymethyl)piperidine-3,4,5-triol] and a branched trihydroxynipecotic acid [(3R,4R,5R)-3,4,5-trihydroxypiperidine-3-carboxylic acid] from sugar lactones with a carbon substituent at C-2. ACTA ACUST UNITED AC 2012. [DOI: 10.1016/j.tetasy.2012.03.007] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
|
254
|
Awan SI, Werz DB. Syntheses of 1,2-annulated and 1-spiroannulated carbohydrate derivatives: Recent developments. Bioorg Med Chem 2012; 20:1846-56. [DOI: 10.1016/j.bmc.2011.10.089] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2011] [Revised: 10/20/2011] [Accepted: 10/30/2011] [Indexed: 01/09/2023]
|
255
|
Sumida T, Stubbs KA, Ito M, Yokoyama S. Gaining insight into the inhibition of glycoside hydrolase family 20 exo-β-N-acetylhexosaminidases using a structural approach. Org Biomol Chem 2012; 10:2607-12. [PMID: 22367352 DOI: 10.1039/c2ob06636j] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
One useful methodology that has been used to give insight into how chemically synthesized inhibitors bind to enzymes and the reasons underlying their potency is crystallographic studies of inhibitor-enzyme complexes. Presented here is the X-ray structural analysis of a representative family 20 exo-β-N-acetylhexosaminidase in complex with various known classes of inhibitor of these types of enzymes, which highlights how different inhibitor classes can inhibit the same enzyme. This study will aid in the future development of inhibitors of not only exo-β-N-acetylhexosaminidases but also other types of glycoside hydrolases.
Collapse
Affiliation(s)
- Tomomi Sumida
- RIKEN Systems and Structural Biology Center, 1-7-22 Suehiro-cho, Tsurumi, Yokohama 230-0045, Japan
| | | | | | | |
Collapse
|
256
|
Weber CC, Masters AF, Maschmeyer T. Controlling Hydrolysis Reaction Rates with Binary Ionic Liquid Mixtures by Tuning Hydrogen-Bonding Interactions. J Phys Chem B 2012; 116:1858-64. [DOI: 10.1021/jp211543v] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Cameron C. Weber
- Laboratory of Advanced Catalysis
for Sustainability,
School of Chemistry, University of Sydney, Sydney 2006, Australia
| | - Anthony F. Masters
- Laboratory of Advanced Catalysis
for Sustainability,
School of Chemistry, University of Sydney, Sydney 2006, Australia
| | - Thomas Maschmeyer
- Laboratory of Advanced Catalysis
for Sustainability,
School of Chemistry, University of Sydney, Sydney 2006, Australia
| |
Collapse
|
257
|
Intramolecular Huisgen [3+2] cycloaddition in water: synthesis of fused pyrrolidine–triazoles. ACTA ACUST UNITED AC 2012. [DOI: 10.1016/j.tetasy.2012.02.011] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
|
258
|
Kelebekli L, Balcı N, Şahin E. Oxazolidinone polycyclitols. Stereospecific synthesis of novel aminocarbasugars with oxazolidinone ring. Tetrahedron 2012. [DOI: 10.1016/j.tet.2011.12.078] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
|
259
|
Structural and mechanistic insight into N-glycan processing by endo-α-mannosidase. Proc Natl Acad Sci U S A 2012; 109:781-6. [PMID: 22219371 DOI: 10.1073/pnas.1111482109] [Citation(s) in RCA: 63] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023] Open
Abstract
N-linked glycans play key roles in protein folding, stability, and function. Biosynthetic modification of N-linked glycans, within the endoplasmic reticulum, features sequential trimming and readornment steps. One unusual enzyme, endo-α-mannosidase, cleaves mannoside linkages internally within an N-linked glycan chain, short circuiting the classical N-glycan biosynthetic pathway. Here, using two bacterial orthologs, we present the first structural and mechanistic dissection of endo-α-mannosidase. Structures solved at resolutions 1.7-2.1 Å reveal a (β/α)(8) barrel fold in which the catalytic center is present in a long substrate-binding groove, consistent with cleavage within the N-glycan chain. Enzymatic cleavage of authentic Glc(1/3)Man(9)GlcNAc(2) yields Glc(1/3)-Man. Using the bespoke substrate α-Glc-1,3-α-Man fluoride, the enzyme was shown to act with retention of anomeric configuration. Complexes with the established endo-α-mannosidase inhibitor α-Glc-1,3-deoxymannonojirimycin and a newly developed inhibitor, α-Glc-1,3-isofagomine, and with the reducing-end product α-1,2-mannobiose structurally define the -2 to +2 subsites of the enzyme. These structural and mechanistic data provide a foundation upon which to develop new enzyme inhibitors targeting the hijacking of N-glycan synthesis in viral disease and cancer.
Collapse
|
260
|
Liu Y, Sun JW. Copper(II)-catalyzed synthesis of benzo[f]pyrido[1,2-a]indole-6,11-dione derivatives via naphthoquinone difunctionalization reaction. J Org Chem 2012; 77:1191-7. [PMID: 22185652 DOI: 10.1021/jo2023312] [Citation(s) in RCA: 56] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Benzo[f]pyrido[1,2-a]indole-6,11-diones have been synthesized in high yields by copper(II)-catalyzed three-component reactions of acyl bromide, 1,4-naphthoquinone, and pyridine (or isoquinoline) via sp(2)-C-H difunctionalization of naphthoquinone followed by intramolecular cyclization and oxidative aromatization. In an attempt to expand the reaction scope and to help clarify the reaction mechanism, 1,3-dicarbonyl compounds are used in place of acyl bromides to take part in this reaction, and the benzo[f]pyrido[1,2-a]indole-6,11-diones derivatives are also obtained in excellent yields.
Collapse
Affiliation(s)
- Yun Liu
- Institute of Chemistry and Chemical Engineering, Xuzhou Normal University, Xuzhou 221116, Jiangsu, P. R. China.
| | | |
Collapse
|
261
|
Kanso R, Yancey EA, Striegler S. N-Benzylgalactonoamidines as potent β-galactosidase inhibitors. Tetrahedron 2012. [DOI: 10.1016/j.tet.2011.10.048] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/16/2022]
|
262
|
|
263
|
Pérez-Castells J, Fontanella M, Ardá A, Canãda FJ, Sollogoub M, Blériot Y, Jiménez-Barbero J. Conformational analysis of seven-membered 1-N-iminosugars by NMR and molecular modelling. NEW J CHEM 2012. [DOI: 10.1039/c2nj20967e] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
|
264
|
Aguilar-Moncayo M, Díaz-Pérez P, García Fernández JM, Ortiz Mellet C, García-Moreno MI. Synthesis and glycosidase inhibitory activity of isourea-type bicyclic sp2-iminosugars related to galactonojirimycin and allonojirimycin. Tetrahedron 2012. [DOI: 10.1016/j.tet.2011.10.091] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
|
265
|
Dragutan I, Dragutan V, Demonceau A. Targeted drugs by olefin metathesis: piperidine-based iminosugars. RSC Adv 2012. [DOI: 10.1039/c1ra00910a] [Citation(s) in RCA: 84] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
|
266
|
Jang J, Jung JW, Ahn J, Sim J, Chang DJ, Kim DD, Suh YG. Asymmetric formal synthesis of schulzeines A and C. Org Biomol Chem 2012; 10:5202-4. [DOI: 10.1039/c2ob25772f] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
267
|
Merino-Montiel P, López Ó, Fernández-Bolaños JG. Unprecedented spiro-annelated sugar isoureas, guanidines and amidines as new families of glycosidase inhibitors. RSC Adv 2012. [DOI: 10.1039/c2ra21561f] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
|
268
|
Hu H, Feng J, Zhu Y, Gu N, Kan Y. Copper acetate monohydrate: a cheap but efficient oxidant for synthesizing multi-substituted indolizines from pyridinium ylides and electron deficient alkenes. RSC Adv 2012. [DOI: 10.1039/c2ra21213g] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023] Open
|
269
|
Takahata H, Taguchi T, Imahori T, Yoshimura Y, Kato A, Adachi I, Kawahata M, Yamaguchi K. Asymmetric Synthesis of 2-Propylisofagomine Using Allylic Hydroxy Group Accelerated Ring-Closing Enyne Metathesis. HETEROCYCLES 2012. [DOI: 10.3987/com-11-s(p)74] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
|
270
|
Durka M, Buffet K, Iehl J, Holler M, Nierengarten JF, Vincent SP. The Inhibition of Liposaccharide Heptosyltransferase WaaC with Multivalent Glycosylated Fullerenes: A New Mode of Glycosyltransferase Inhibition. Chemistry 2011; 18:641-51. [DOI: 10.1002/chem.201102052] [Citation(s) in RCA: 92] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2011] [Indexed: 12/13/2022]
|
271
|
Kim JY, Mu Y, Jin X, Park SH, Pham VT, Song DK, Lee KY, Ham WH. Efficient and stereoselective syntheses of DAB-1 and d-fagomine via chiral 1,3-oxazine. Tetrahedron 2011. [DOI: 10.1016/j.tet.2011.09.084] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
|
272
|
Cordero FM, Bonanno P, Chioccioli M, Gratteri P, Robina I, Moreno Vargas AJ, Brandi A. Diversity-oriented syntheses of 7-substituted lentiginosines. Tetrahedron 2011. [DOI: 10.1016/j.tet.2011.10.008] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
|
273
|
Rönnols J, Burkhardt A, Cumpstey I, Widmalm G. pKa-Determination and Conformational Studies by NMR Spectroscopy of D-Altrose-Containing and other Pseudodisaccharides as Glycosidase Inhibitor Candidates. European J Org Chem 2011. [DOI: 10.1002/ejoc.201101385] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
|
274
|
Win-Mason AL, Jongkees SAK, Withers SG, Tyler PC, Timmer MSM, Stocker BL. Stereoselective Total Synthesis of Aminoiminohexitols via Carbamate Annulation. J Org Chem 2011; 76:9611-21. [DOI: 10.1021/jo201151b] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Anna L. Win-Mason
- School of Chemical and Physical
Sciences, Victoria University of Wellington, P.O. Box 600, Wellington 6140, New Zealand
- Malaghan Institute of Medical Research, P.O. Box 7060, Wellington 6242,
New Zealand
| | - Seino A. K. Jongkees
- Chemistry Department, University of British Columbia, 2036 Main Mall, Vancouver,
BC, Canada V6T 1Z1
| | - Stephen G. Withers
- Chemistry Department, University of British Columbia, 2036 Main Mall, Vancouver,
BC, Canada V6T 1Z1
| | - Peter C. Tyler
- Carbohydrate
Chemistry Team, Industrial Research Limited, P.O. Box 31-310, Lower
Hutt 5040, New Zealand
| | - Mattie S. M. Timmer
- School of Chemical and Physical
Sciences, Victoria University of Wellington, P.O. Box 600, Wellington 6140, New Zealand
| | - Bridget L. Stocker
- Malaghan Institute of Medical Research, P.O. Box 7060, Wellington 6242,
New Zealand
| |
Collapse
|
275
|
Decroocq C, Rodríguez-Lucena D, Russo V, Mena Barragán T, Ortiz Mellet C, Compain P. The Multivalent Effect in Glycosidase Inhibition: Probing the Influence of Architectural Parameters with Cyclodextrin-based Iminosugar Click Clusters. Chemistry 2011; 17:13825-31. [DOI: 10.1002/chem.201102266] [Citation(s) in RCA: 83] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2011] [Indexed: 11/08/2022]
|
276
|
Chiron approach strategy to the bicyclic oxazolidinylpiperidine: a building block for preparing mono- and bi-cyclic iminosugars. Tetrahedron Lett 2011. [DOI: 10.1016/j.tetlet.2011.09.039] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
|
277
|
Chandrasekhar B, Prasada Rao J, Venkateswara Rao B, Naresh P. [2,3]-Wittig rearrangement approach to iminosugar C-glycosides: 5-epi-ethylfagomine, 2-epi-5-deoxyadenophorine and formal synthesis of indolizidine 167B and 209D. Tetrahedron Lett 2011. [DOI: 10.1016/j.tetlet.2011.08.084] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
|
278
|
Chemo-enzymatic synthesis of the azasugars 1,4-dideoxyallonojirimycin and 1,4-dideoxymannojirimycin. ACTA ACUST UNITED AC 2011. [DOI: 10.1016/j.tetasy.2011.10.015] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
|
279
|
Cao HT, Roisnel T, Grée R. Intramolecular Tandem Isomerization-Mannich Reaction as a New Route Towards Aminocyclopentitols. European J Org Chem 2011. [DOI: 10.1002/ejoc.201101130] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
|
280
|
|
281
|
Jabgunde AM, Kalamkar NB, Chavan ST, Sabharwal SG, Dhavale DD. Synthesis of new six- and seven-membered 1-N-iminosugars as promising glycosidase inhibitors. Bioorg Med Chem 2011; 19:5912-5. [DOI: 10.1016/j.bmc.2011.07.059] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2011] [Revised: 07/28/2011] [Accepted: 07/29/2011] [Indexed: 11/24/2022]
|
282
|
Burland PA, Osborn HM, Turkson A. Synthesis and glycosidase inhibitory profiles of functionalised morpholines and oxazepanes. Bioorg Med Chem 2011; 19:5679-92. [DOI: 10.1016/j.bmc.2011.07.019] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2011] [Revised: 07/06/2011] [Accepted: 07/10/2011] [Indexed: 12/12/2022]
|
283
|
Li GL, He JY, Zhang A, Wan Y, Wang B, Chen WH. Toward potent α-glucosidase inhibitors based on xanthones: A closer look into the structure–activity correlations. Eur J Med Chem 2011; 46:4050-5. [DOI: 10.1016/j.ejmech.2011.06.003] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2010] [Revised: 06/02/2011] [Accepted: 06/04/2011] [Indexed: 11/26/2022]
|
284
|
Diot JD, Moreno IG, Twigg G, Mellet CO, Haupt K, Butters TD, Kovensky J, Gouin SG. Amphiphilic 1-Deoxynojirimycin Derivatives through Click Strategies for Chemical Chaperoning in N370S Gaucher Cells. J Org Chem 2011; 76:7757-68. [DOI: 10.1021/jo201125x] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Affiliation(s)
- Jennifer D. Diot
- Laboratoire des Glucides UMR CNRS 6219, Institut de Chimie de Picardie, Faculté des Sciences, Université de Picardie Jules Verne, 33 rue Saint-Leu, 80039 Amiens Cedex 1, France
| | - Isabel Garcia Moreno
- Departamento de Química Orgánica, Facultad de Química, Universidad de Sevilla C/Profesor García González no. 1, 41012 Sevilla, Spain
| | - Gabriele Twigg
- Oxford Glycobiology Institute, Department of Biochemistry, University of Oxford, South Parks Road, Oxford OX1 3QU, United Kingdom
| | - Carmen Ortiz Mellet
- Departamento de Química Orgánica, Facultad de Química, Universidad de Sevilla C/Profesor García González no. 1, 41012 Sevilla, Spain
| | - Karsten Haupt
- Laboratoire Génie Enzymatique et Cellulaire, UMR CNRS-6022, Université de Technologie de Compiègne BP 20205, 60205 Compiègne Cedex, France
| | - Terry D. Butters
- Oxford Glycobiology Institute, Department of Biochemistry, University of Oxford, South Parks Road, Oxford OX1 3QU, United Kingdom
| | - José Kovensky
- Laboratoire des Glucides UMR CNRS 6219, Institut de Chimie de Picardie, Faculté des Sciences, Université de Picardie Jules Verne, 33 rue Saint-Leu, 80039 Amiens Cedex 1, France
| | - Sébastien G. Gouin
- Laboratoire des Glucides UMR CNRS 6219, Institut de Chimie de Picardie, Faculté des Sciences, Université de Picardie Jules Verne, 33 rue Saint-Leu, 80039 Amiens Cedex 1, France
| |
Collapse
|
285
|
Zhang R, Pan YT, He S, Lam M, Brayer GD, Elbein AD, Withers SG. Mechanistic analysis of trehalose synthase from Mycobacterium smegmatis. J Biol Chem 2011; 286:35601-35609. [PMID: 21840994 DOI: 10.1074/jbc.m111.280362] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Trehalose synthase (TreS) catalyzes the reversible interconversion of maltose and trehalose and has been shown recently to function primarily in the mobilization of trehalose as a glycogen precursor. Consequently, the mechanism of this intriguing isomerase is of both academic and potential pharmacological interest. TreS catalyzes the hydrolytic cleavage of α-aryl glucosides as well as α-glucosyl fluoride, thereby allowing facile, continuous assays. Reaction of TreS with 5-fluoroglycosyl fluorides results in the trapping of a covalent glycosyl-enzyme intermediate consistent with TreS being a member of the retaining glycoside hydrolase family 13 enzyme family, thus likely following a two-step, double displacement mechanism. This trapped intermediate was subjected to protease digestion followed by LC-MS/MS analysis, and Asp(230) was thereby identified as the catalytic nucleophile. The isomerization reaction was shown to be an intramolecular process by demonstration of the inability of TreS to incorporate isotope-labeled exogenous glucose into maltose or trehalose consistent with previous studies on other TreS enzymes. The absence of a secondary deuterium kinetic isotope effect and the general independence of k(cat) upon leaving group ability both point to a rate-determining conformational change, likely the opening and closing of the enzyme active site.
Collapse
Affiliation(s)
- Ran Zhang
- Department of Chemistry, University of British Columbia, Vancouver, British Columbia V6T 1Z1, Canada
| | - Yuan T Pan
- Department of Biochemistry and Molecular Biology, University of Arkansas for Medical Sciences, Little Rock, Arkansas 72205
| | - Shouming He
- Department of Chemistry, University of British Columbia, Vancouver, British Columbia V6T 1Z1, Canada
| | - Michael Lam
- Department of Biochemistry and Molecular Biology, University of British Columbia, Vancouver, British Columbia V6T 1Z1, Canada
| | - Gary D Brayer
- Department of Biochemistry and Molecular Biology, University of British Columbia, Vancouver, British Columbia V6T 1Z1, Canada
| | - Alan D Elbein
- Department of Biochemistry and Molecular Biology, University of Arkansas for Medical Sciences, Little Rock, Arkansas 72205
| | - Stephen G Withers
- Department of Chemistry, University of British Columbia, Vancouver, British Columbia V6T 1Z1, Canada.
| |
Collapse
|
286
|
Rehák J, Fišera L, Kožíšek J, Bellovičová L. Synthesis of trihydroxylated pyrrolizidine and indolizidine alkaloids based on SmI2-induced reductive coupling of chiral nitrones with methyl acrylate. Tetrahedron 2011. [DOI: 10.1016/j.tet.2011.05.129] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
|
287
|
Muthusamy S, Gangadurai C, Krishnamurthi J, Suresh E. Stereoselective synthesis of piperidinone and quinolinone systems via ring opening reactions using TiCl4/silyl reagents. Tetrahedron 2011. [DOI: 10.1016/j.tet.2011.04.049] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
|
288
|
Rao MV, Chandrasekhar B, Rao BV, Swarnalatha JL. A new stereoselective approach to aminocyclohexitols using a Grignard addition on to an N-benzyl sugar imine and RCM. ACTA ACUST UNITED AC 2011. [DOI: 10.1016/j.tetasy.2011.07.015] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
|
289
|
Dragutan I, Dragutan V, Mitan C, Vosloo HCM, Delaude L, Demonceau A. Metathesis access to monocyclic iminocyclitol-based therapeutic agents. Beilstein J Org Chem 2011; 7:699-716. [PMID: 21804866 PMCID: PMC3135129 DOI: 10.3762/bjoc.7.81] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2011] [Accepted: 05/05/2011] [Indexed: 02/05/2023] Open
Abstract
By focusing on recent developments on natural and non-natural azasugars (iminocyclitols), this review bolsters the case for the role of olefin metathesis reactions (RCM, CM) as key transformations in the multistep syntheses of pyrrolidine-, piperidine- and azepane-based iminocyclitols, as important therapeutic agents against a range of common diseases and as tools for studying metabolic disorders. Considerable improvements brought about by introduction of one or more metathesis steps are outlined, with emphasis on the exquisite steric control and atom-economical outcome of the overall process. The comparative performance of several established metathesis catalysts is also highlighted.
Collapse
Affiliation(s)
- Ileana Dragutan
- Institute of Organic Chemistry, Romanian Academy, 202B Spl. Independentei, P.O. Box 35-108, Bucharest 060023, Romania
| | - Valerian Dragutan
- Institute of Organic Chemistry, Romanian Academy, 202B Spl. Independentei, P.O. Box 35-108, Bucharest 060023, Romania
| | - Carmen Mitan
- Institute of Organic Chemistry, Romanian Academy, 202B Spl. Independentei, P.O. Box 35-108, Bucharest 060023, Romania
| | - Hermanus CM Vosloo
- School of Physical and Chemical Sciences, North-West University, Hoffman Street, Potchefstroom 2520, South Africa
| | - Lionel Delaude
- Macromolecular Chemistry and Organic Catalysis, Institute of Chemistry (B6a), University of Liège, Sart Tilman, Liège 4000, Belgium
| | - Albert Demonceau
- Macromolecular Chemistry and Organic Catalysis, Institute of Chemistry (B6a), University of Liège, Sart Tilman, Liège 4000, Belgium
| |
Collapse
|
290
|
Boto A, Romero-Estudillo I. One-pot stereoselective synthesis of 1,2-amino alcohol derivatives. Org Lett 2011; 13:3426-9. [PMID: 21615165 DOI: 10.1021/ol201173a] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Common β-hydroxy amino acids (such as threonine) can be readily transformed into 1,2-amino alcohols with excellent stereoselectivity. This one-pot decarboxylation-alkylation process allows the replacement of the carboxyl group by alkyl, allyl, or aryl groups, generally in high yields. A variation of the process (decarboxylation-Diels-Alder) allows the formation of bi- and polycyclic systems, which are useful precursors of alkaloid cores or iminosugars.
Collapse
Affiliation(s)
- Alicia Boto
- Instituto de Productos Naturales y Agrobiología CSIC, Avda. Astrofísico Fco. Sánchez 3, 38206-La Laguna, Tenerife, Spain.
| | | |
Collapse
|
291
|
Dekaris V, Pulz R, Al-Harrasi A, Lentz D, Reissig HU. Stereoselective Syntheses of Aza, Amino and Imino Sugar Derivatives by Hydroboration of 3,6-Dihydro-2H-1,2-oxazines as Key Reaction. European J Org Chem 2011. [DOI: 10.1002/ejoc.201100230] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
|
292
|
Kanso R, Striegler S. Multi gram-scale synthesis of galactothionolactam and its transformation into a galactonoamidine. Carbohydr Res 2011; 346:897-904. [DOI: 10.1016/j.carres.2011.02.021] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2010] [Revised: 02/18/2011] [Accepted: 02/24/2011] [Indexed: 11/25/2022]
|
293
|
High regiocontrol in the nucleophilic ring opening of 1-aralkyl-3,4-epoxypiperidines with amines—a short-step synthesis of 4-fluorobenzyltrozamicol and novel anilidopiperidines. Tetrahedron 2011. [DOI: 10.1016/j.tet.2011.03.045] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
|
294
|
Tanabe G, Otani T, Cong W, Minematsu T, Ninomiya K, Yoshikawa M, Muraoka O. Biological evaluation of 3′-O-alkylated analogs of salacinol, the role of hydrophobic alkyl group at 3′ position in the side chain on the α-glucosidase inhibitory activity. Bioorg Med Chem Lett 2011; 21:3159-62. [DOI: 10.1016/j.bmcl.2011.02.109] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2010] [Revised: 02/24/2011] [Accepted: 02/26/2011] [Indexed: 11/29/2022]
|
295
|
Xie W, Tanabe G, Matsuoka K, Amer MF, Minematsu T, Wu X, Yoshikawa M, Muraoka O. Role of the side chain stereochemistry in the α-glucosidase inhibitory activity of kotalanol, a potent natural α-glucosidase inhibitor. Bioorg Med Chem 2011; 19:2252-62. [DOI: 10.1016/j.bmc.2011.02.028] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2010] [Revised: 02/15/2011] [Accepted: 02/16/2011] [Indexed: 10/18/2022]
|
296
|
Lamas MC, Malacria M, Thorimbert S. Enantioselective Synthesis of Deoxymannojirimycin Based on Sharpless Asymmetric Epoxidation of a Highly Functionalized Allylic Alcohol. European J Org Chem 2011. [DOI: 10.1002/ejoc.201100102] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
|
297
|
Massen ZS, Coutouli-Argyropoulou E, Sarli VC, Gallos JK. Synthesis of a protected trihydroxyindolizidine 3-carboxylate via a hetero-Diels–Alder addition of ethyl 2-nitrosoacrylate to a d-ribose-derived exo-glycal. Carbohydr Res 2011; 346:508-11. [DOI: 10.1016/j.carres.2010.12.022] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2010] [Revised: 12/28/2010] [Accepted: 12/29/2010] [Indexed: 11/29/2022]
|
298
|
|
299
|
Lahiri R, Kokatla HP, Vankar YD. An improved method of ring closing metathesis in the presence of basic amines: application to the formal synthesis of (+)-lentiginosine and other piperidines and carbamino sugar analogs. Tetrahedron Lett 2011. [DOI: 10.1016/j.tetlet.2010.12.020] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
|
300
|
Macauley MS, He Y, Gloster TM, Stubbs KA, Davies GJ, Vocadlo DJ. Inhibition of O-GlcNAcase using a potent and cell-permeable inhibitor does not induce insulin resistance in 3T3-L1 adipocytes. ACTA ACUST UNITED AC 2011; 17:937-48. [PMID: 20851343 PMCID: PMC2954295 DOI: 10.1016/j.chembiol.2010.07.006] [Citation(s) in RCA: 65] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2010] [Revised: 07/08/2010] [Accepted: 07/13/2010] [Indexed: 01/12/2023]
Abstract
To probe increased O-GlcNAc levels as an independent mechanism governing insulin resistance in 3T3-L1 adipocytes, a new class of O-GlcNAcase (OGA) inhibitor was studied. 6-Acetamido-6-deoxy-castanospermine (6-Ac-Cas) is a potent inhibitor of OGA. The structure of 6-Ac-Cas bound in the active site of an OGA homolog reveals structural features contributing to its potency. Treatment of 3T3-L1 adipocytes with 6-Ac-Cas increases O-GlcNAc levels in a dose-dependent manner. These increases in O-GlcNAc levels do not induce insulin resistance functionally, measured using a 2-deoxyglucose (2-DOG) uptake assay, or at the molecular level, determined by evaluating levels of phosphorylated IRS-1 and Akt. These results, and others described, provide a structural blueprint for improved inhibitors and collectively suggest that increased O-GlcNAc levels, brought about by inhibition of OGA, does not by itself cause insulin resistance in 3T3-L1 adipocytes.
Collapse
|