1
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Chand HR, Tiwari MK, Bhattacharya AK. Glycal mediated synthesis of piperidine alkaloids: fagomine, 4- epi-fagomine, 2-deoxynojirimycin, and an advanced intermediate, iminoglycal. RSC Adv 2022; 12:33021-33031. [PMID: 36425185 PMCID: PMC9670682 DOI: 10.1039/d2ra05224e] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2022] [Accepted: 10/26/2022] [Indexed: 12/09/2023] Open
Abstract
Glucal and galactal are transformed into 2-deoxyglycolactams, which are important building blocks in the synthesis of biologically active piperidine alkaloids, fagomine and 4-epi-fagomine. In one of the strategies, reduction of 2-deoxyglycolactam-N-Boc carbonyl by lithium triethylborohydride (Super-Hydride®) has been exploited to generate lactamol whereas reduction followed by dehydration was utilized as the other strategy to functionalize the C1-C2 bond in the iminosugar substrate. The strategies provide the formal synthesis of 2-deoxynojirimycin, nojirimycin and nojirimycin B. DFT studies were carried out to determine the reason for the failure of the formation of the 2-deoxygalactonojirimycin derivative. Further, DFT studies suggest that phenyl moieties of protecting groups and lone pairs of oxygen in carbamate group plays a vital role in deciphering the conformational space of the reaction intermediates and transition-state structures through cation-π or cation-lone pair interactions. The influence of these interactions is more pronounced at low temperature when the entropy factor is small.
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Affiliation(s)
- Hemender R Chand
- Division of Organic Chemistry, CSIR-National Chemical Laboratory Dr Homi Bhabha Road, Pashan Pune 411008 Maharashtra India
| | - Mritunjay K Tiwari
- Physical and Material Chemistry Division, CSIR-National Chemical Laboratory Dr Homi Bhabha Road, Pashan Pune 411008 Maharashtra India
| | - Asish K Bhattacharya
- Division of Organic Chemistry, CSIR-National Chemical Laboratory Dr Homi Bhabha Road, Pashan Pune 411008 Maharashtra India
- Academy of Scientific and Innovative Research (AcSIR) Ghaziabad India
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2
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Nájera C, Foubelo F, Sansano JM, Yus M. Stereodivergent routes in organic synthesis: carbohydrates, amino acids, alkaloids and terpenes. Org Biomol Chem 2020; 18:1232-1278. [DOI: 10.1039/c9ob02419k] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
The natural occurrence of enantiomers and diastereomers is often encountered.
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Affiliation(s)
- Carmen Nájera
- Centro de Innovación en Química Avanzada (ORFEO-CINQA)
- Universidad de Alicante
- E-03080 Alicante
- Spain
| | - Francisco Foubelo
- Centro de Innovación en Química Avanzada (ORFEO-CINQA)
- Universidad de Alicante
- E-03080 Alicante
- Spain
- Departamento de Química Orgánica
| | - José M. Sansano
- Centro de Innovación en Química Avanzada (ORFEO-CINQA)
- Universidad de Alicante
- E-03080 Alicante
- Spain
- Departamento de Química Orgánica
| | - Miguel Yus
- Centro de Innovación en Química Avanzada (ORFEO-CINQA)
- Universidad de Alicante
- E-03080 Alicante
- Spain
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3
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Santhanam V, Pant P, Jayaram B, Ramesh NG. Design, synthesis and glycosidase inhibition studies of novel triazole fused iminocyclitol-δ-lactams. Org Biomol Chem 2019; 17:1130-1140. [DOI: 10.1039/c8ob03084g] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Synthesis of novel triazole fused iminocyclitol-δ-lactams, from tri-O-benzyl-d-glucal, involving intermolecular [3 + 2]cycloaddition and intramolecular lactamisation reactions as key steps is described.
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Affiliation(s)
- Venkatesan Santhanam
- Department of Chemistry
- Indian Institute of Technology Delhi
- New Delhi – 110016
- India
| | - Pradeep Pant
- Department of Chemistry
- Indian Institute of Technology Delhi
- New Delhi – 110016
- India
| | - B. Jayaram
- Department of Chemistry
- Indian Institute of Technology Delhi
- New Delhi – 110016
- India
| | - Namakkal G. Ramesh
- Department of Chemistry
- Indian Institute of Technology Delhi
- New Delhi – 110016
- India
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4
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Kuznetsov NY, Tikhov RM, Godovikov IA, Khrustalev VN, Bubnov YN. New enolate-carbodiimide rearrangement in the concise synthesis of 6-amino-2,3-dihydro-4-pyridinones from homoallylamines. Org Biomol Chem 2018; 14:4283-98. [PMID: 27080757 DOI: 10.1039/c6ob00293e] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Three-step synthesis of 6-amino-2,3-dihydro-4-pyridinones from homoallylamines involving NBS-mediated cyclization of N-(3-butenyl)ureas to 6-(bromomethyl)-2-iminourethanes, dehydrohalogenation and a novel rearrangement as a key step has been developed. The scope and limitations of the method, as well as the mechanism of the rearrangement, supported by kinetic studies and the isolation of N-(1-adamantyl)carbodiimide, are discussed. The final products, imino-analogues of well known piperidine-2,4-diones, are promising building blocks in the synthesis of bio-/pharmacological compounds.
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Affiliation(s)
- N Yu Kuznetsov
- A.N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, Vavilov 28, 119991, Moscow, Russian Federation.
| | - R M Tikhov
- A.N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, Vavilov 28, 119991, Moscow, Russian Federation.
| | - I A Godovikov
- A.N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, Vavilov 28, 119991, Moscow, Russian Federation.
| | - V N Khrustalev
- A.N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, Vavilov 28, 119991, Moscow, Russian Federation. and Department of Inorganic Chemistry, Peoples' Friendship University of Russia, Miklukho-Maklay St., 6, Moscow 117198, Russian Federation
| | - Yu N Bubnov
- A.N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, Vavilov 28, 119991, Moscow, Russian Federation. and N.D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Leninsky pr. 47, 119991 Moscow, Russia
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5
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Guo J, Li W, Xue W, Ye XS. Transition State-Based Sialyltransferase Inhibitors: Mimicking Oxocarbenium Ion by Simple Amide. J Med Chem 2017; 60:2135-2141. [PMID: 28165727 DOI: 10.1021/acs.jmedchem.6b01644] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
In the new transition-state based sialyltransferase inhibitors, an amide group was placed at the corresponding C-2 position of CMP-sialic acid to mimic the geometry and charge distribution in the transition state, and simple aromatic or aliphatic rings were used instead of the sialic acid moiety. All synthetic compounds exhibited excellent α(2-6)-sialyltransferase inhibition, resulting in up to a 2600-fold higher affinity for the enzyme than CMP-Neu5Ac, suggesting that amide is a key element for simulating transition-state features.
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Affiliation(s)
- Jian Guo
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University , Xue Yuan Road no. 38, Beijing 100191, China
| | - Wenming Li
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University , Xue Yuan Road no. 38, Beijing 100191, China
| | - Weiwei Xue
- School of Pharmaceutical Sciences and Innovative Drug Research Centre, Chongqing University , Daxuecheng South Road no. 55, Chongqing 401331, China
| | - Xin-Shan Ye
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University , Xue Yuan Road no. 38, Beijing 100191, China
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6
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Ketenimine mediated synthesis of lactam iminosugars: development of one-pot process via tandem hydrative amidation of amino-alkynes and intramolecular transamidation. Tetrahedron 2016. [DOI: 10.1016/j.tet.2016.07.036] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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7
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Wuttke A, Fischer SN, Nebel A, Marsch M, Geyer A. Improved δ-valerolactam templates for the assembly of Aβ-miniamyloids by boronic ester formation. Org Biomol Chem 2016; 14:5032-48. [DOI: 10.1039/c6ob00565a] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Numerically defined oligomers of amyloidogenic peptides were obtained by boronic ester formation with synthetic polyol templates.
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Affiliation(s)
- André Wuttke
- Institute of Chemistry
- Philipps-University Marburg
- 35032 Marburg
- Germany
| | | | - Annika Nebel
- Institute of Chemistry
- Philipps-University Marburg
- 35032 Marburg
- Germany
| | - Michael Marsch
- Institute of Chemistry
- Philipps-University Marburg
- 35032 Marburg
- Germany
| | - Armin Geyer
- Institute of Chemistry
- Philipps-University Marburg
- 35032 Marburg
- Germany
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8
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Marson CM, Yau KC. Regioselective synthesis of substituted piperidine-2,4-diones and their derivatives via Dieckmann cyclisations. Tetrahedron 2015. [DOI: 10.1016/j.tet.2015.06.052] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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9
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Sośnicki JG, Dzitkowski P, Struk Ł. Regioselective Synthesis of 6-Vinyl-3,6-dihydropyridine-2(1H)-ones through Simple Addition of a Vinylmagnesium “Ate” Complex to 2-Pyridones. European J Org Chem 2015. [DOI: 10.1002/ejoc.201500605] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
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10
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Wheatley RW, Huber RE. An allolactose trapped at the lacZ β-galactosidase active site with its galactosyl moiety in a (4)H3 conformation provides insights into the formation, conformation, and stabilization of the transition state. Biochem Cell Biol 2015; 93:531-40. [PMID: 26291713 DOI: 10.1139/bcb-2015-0037] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
When lactose was incubated with G794A-β-galactosidase (a variant with a "closed" active site loop that binds transition state analogs well) an allolactose was trapped with its Gal moiety in a (4)H3 conformation, similar to the oxocarbenium ion-like conformation expected of the transition state. The numerous interactions formed between the (4)H3 structure and β-galactosidase indicate that this structure is representative of the transition state. This conformation is also very similar to that of d-galactono-1,5-lactone, a good transition state analog. Evidence indicates that substrates take up the (4)H3 conformation during migration from the shallow to the deep mode. Steric forces utilizing His418 and other residues are important for positioning the O1 leaving group into a quasi-axial position. An electrostatic interaction between the O5 of the distorted Gal and Tyr503 as well as C-H-π bonds with Trp568 are also significant. Computational studies of the energy of sugar ring distortion show that the β-galactosidase reaction itinerary is driven by energetic considerations in utilization of a (4)H3 transition state with a novel (4)C1-(4)H3-(4)C1 conformation itinerary. To our knowledge, this is the first X-ray crystallographic structural demonstration that the transition state of a natural substrate of a glycosidase has a (4)H3 conformation.
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Affiliation(s)
- Robert W Wheatley
- Biochemistry Division, Faculty of Science, University of Calgary, Calgary, AB T2N 1N4, Canada.,Biochemistry Division, Faculty of Science, University of Calgary, Calgary, AB T2N 1N4, Canada
| | - Reuben E Huber
- Biochemistry Division, Faculty of Science, University of Calgary, Calgary, AB T2N 1N4, Canada.,Biochemistry Division, Faculty of Science, University of Calgary, Calgary, AB T2N 1N4, Canada
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11
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Kim K, Hong SH. Iridium-catalyzed single-step N-substituted lactam synthesis from lactones and amines. J Org Chem 2015; 80:4152-6. [PMID: 25798753 DOI: 10.1021/acs.joc.5b00101] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Catalytic lactam synthesis was achieved directly from lactones and amines using an Ir catalyst. Three sequential transformations—aminolysis of lactone, N-alkylation of amine with hydroxyamide, and intramolecular transamidation of aminoamide—afforded the corresponding N-substituted lactams.
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Affiliation(s)
- Kicheol Kim
- Department of Chemistry, College of Natural Sciences, Seoul National University, Seoul 151-747, Korea
| | - Soon Hyeok Hong
- Department of Chemistry, College of Natural Sciences, Seoul National University, Seoul 151-747, Korea
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12
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Bhuma N, Vangala M, Nair RJ, Sabharwal SG, Dhavale DD. Halogenated d-xylono-δ-lactams: synthesis and enzyme inhibition study. Carbohydr Res 2015; 402:215-24. [DOI: 10.1016/j.carres.2014.10.023] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2014] [Revised: 10/18/2014] [Accepted: 10/23/2014] [Indexed: 10/24/2022]
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13
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Guo LD, Liang P, Zheng JF, Huang PQ. A Concise and Divergent Approach to Hydroxylated Piperidine Alkaloids and Azasugar Lactams. European J Org Chem 2013. [DOI: 10.1002/ejoc.201201618] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
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14
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An efficient synthesis of δ-glyconolactams by intramolecular Schmidt–Boyer reaction under microwave radiation. Tetrahedron Lett 2012. [DOI: 10.1016/j.tetlet.2012.10.098] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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15
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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]
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16
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He Y, Bubb AK, Stubbs KA, Gloster TM, Davies GJ. Inhibition of a bacterial O-GlcNAcase homologue by lactone and lactam derivatives: structural, kinetic and thermodynamic analyses. Amino Acids 2010; 40:829-39. [PMID: 20689974 DOI: 10.1007/s00726-010-0700-6] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2010] [Accepted: 07/13/2010] [Indexed: 11/26/2022]
Abstract
The dynamic, intracellular, O-GlcNAc modification is of continuing interest and one whose study through targeted "chemical genetics" approaches is set to increase. Of particular importance is the inhibition of the O-GlcNAc hydrolase, O-GlcNAcase (OGA), since this provides a route to elevate cellular O-GlcNAc levels, and subsequent phenotypic evaluation. Such a small molecule approach complements other methods and potentially avoids changes in protein-protein interactions that manifest themselves in molecular biological approaches to O-GlcNAc transferase knockout or over-expression. Here we describe the kinetic, thermodynamic and three-dimensional structural analysis of a bacterial OGA analogue from Bacteroides thetaiotaomicron, BtGH84, in complex with a lactone oxime (LOGNAc) and a lactam form of N-acetylglucosamine and compare their binding signatures with that of the more potent inhibitor O-(2-acetamido-2-deoxy-D-glucopyranosylidene)amino N-phenyl carbamate (PUGNAc). We show that both LOGNAc and the N-acetyl gluconolactam are significantly poorer inhibitors than PUGNAc, which may reflect poorer mimicry of transition state geometry and steric clashes with the enzyme upon binding; drawbacks that the phenyl carbamate adornment of PUGNAc helps mitigate. Implications for the design of future generations of inhibitors are discussed.
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Affiliation(s)
- Yuan He
- York Structural Biology Laboratory, Department of Chemistry, The University of York, York, UK
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17
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Robertson J, Abdulmalek E. Concerning directed oxidation and transacylation during a general approach to hydroxylated lactams. Tetrahedron Lett 2009. [DOI: 10.1016/j.tetlet.2009.03.084] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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18
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C-2 Epimerization of aldonolactones promoted by magnesium iodide: a new way towards non-enzymatic epimerization. Carbohydr Res 2008; 343:18-30. [DOI: 10.1016/j.carres.2007.10.006] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2007] [Revised: 10/02/2007] [Accepted: 10/10/2007] [Indexed: 11/24/2022]
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19
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Synthesis and Conformational Study of Ser and Cys Derivatives of N-Hydroxy Diketopiperazine. B KOREAN CHEM SOC 2007. [DOI: 10.5012/bkcs.2007.28.12.2414] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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20
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RCM as a tool to freeze conformation of monosaccharides: synthesis of a β-mannopyranoside mimic adopting a conformation close to the biologically relevant B2,5 boat. Tetrahedron Lett 2006. [DOI: 10.1016/j.tetlet.2006.10.046] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
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21
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Jayakanthan K, Vankar YD. Hybrid sugars as glycosidase inhibitors en route to 2-deoxy-2-amino C-glycosyl amino acids. Tetrahedron Lett 2006. [DOI: 10.1016/j.tetlet.2006.10.024] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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22
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Pandey G, Dumbre SG, Khan MI, Shabab M, Puranik VG. A β-lactam-azasugar hybrid as a competitive potent galactosidase inhibitor. Tetrahedron Lett 2006. [DOI: 10.1016/j.tetlet.2006.09.005] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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23
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24
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Pandey G, Dumbre SG, Khan MI, Shabab M. Convergent Approach toward the Synthesis of the Stereoisomers of C-6 Homologues of 1-Deoxynojirimycin and Their Analogues: Evaluation as Specific Glycosidase Inhibitors. J Org Chem 2006; 71:8481-8. [PMID: 17064023 DOI: 10.1021/jo061455v] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A new and stereoselective strategy is developed to synthesize an appropriate template 9 to obtain C-6 homologues of 1-deoxyazasugars such as 1-deoxy-D-galactohomonojirimycin (5), 1-deoxy-4-hydroxymethyl-D-glucohomonojirimycin (6), and their enantiomers. The template 9 is also used to obtain neutral nonbasic pseudo-glyconolactam (8), C-4 amino, and methyl analogues of 1-deoxy-homonojirimycin as new analogues of 1-deoxyhomoazasugars. Compound 5 is found to be a potent and specific inhibitor to alpha-galactosidase (Ki = 1.7 microM). Similarly compounds 6 (Ki= 28 microM), ent-5 (Ki= 129 microM), and ent-6 (Ki= 12 microM) exhibited specific inhibition of beta-glucosidase.
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Affiliation(s)
- Ganesh Pandey
- Division of Organic Chemistry (Synthesis) and Division of Biochemical Science, National Chemical Laboratory, Pune-411008, India.
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25
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Pabba J, Vasella A. Probing the Interaction of the Hydroxy Group at C(4) of Lactone-Type Inhibitors withβ-Glucosidases andβ-Galactosidases. Helv Chim Acta 2006. [DOI: 10.1002/hlca.200690191] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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26
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Pabba J, Mohal N, Vasella A. Synthesis of Glucuronic, Mannuronic, and Galacturonic Acid-Derived Imidazoles as Inhibitors of Bovine Liverβ-Glucuronidase. Helv Chim Acta 2006. [DOI: 10.1002/hlca.200690137] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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27
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A new approach for the asymmetric syntheses of 2-epi-deoxoprosopinine and azasugar derivatives. Tetrahedron 2006. [DOI: 10.1016/j.tet.2005.09.112] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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28
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Cardona F, Moreno G, Guarna F, Vogel P, Schuetz C, Merino P, Goti A. New Concise Total Synthesis of (+)-Lentiginosine and Some Structural Analogues. J Org Chem 2005; 70:6552-5. [PMID: 16050731 DOI: 10.1021/jo0509408] [Citation(s) in RCA: 65] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
An efficient and concise total synthesis of (+)-lentiginosine (1) starting from an L-tartaric acid-derived nitrone using organometallic addition, indium-catalyzed reduction, and ring-closing metathesis reaction as the key steps is reported. Structural analogues of (+)-1 have been also synthesized, and their inhibitory activity toward 22 commercially available glycosidases has been evaluated.
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Affiliation(s)
- Francesca Cardona
- Dipartimento di Chimica Organica Ugo Schiff, Università di Firenze, ICCOM, CNR, via della Lastruccia 13, I-50019 Sesto Fiorentino (FI), Italy.
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29
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30
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Terinek M, Vasella A. Synthesis and evaluation of two mannosamine-derived lactone-type inhibitors of snail β-mannosidase. ACTA ACUST UNITED AC 2005. [DOI: 10.1016/j.tetasy.2004.11.068] [Citation(s) in RCA: 17] [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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31
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van den Berg RJBHN, Donker-Koopman W, van Boom JH, Aerts HMFG, Noort D. Design and synthesis of 2-acetamidomethyl derivatives of isofagomine as potential inhibitors of human lysosomal β-hexosaminidases. Bioorg Med Chem 2004; 12:891-902. [PMID: 14980601 DOI: 10.1016/j.bmc.2003.12.040] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2003] [Accepted: 12/22/2003] [Indexed: 10/26/2022]
Abstract
As part of a program towards the development of specific inhibitors of human lysosomal beta-hexosaminidase for use as chemical chaperones in therapy of G(M2) gangliosidosis related diseases, the synthesis of 2-acetamidomethyl derivatives of isofagomine has been undertaken. Key event in this synthesis is the conversion of a C-2 substituted gluconolactone derivative into the corresponding lactam, followed by reduction to the corresponding amine. The 1-N-imino-2 acetamidomethyl derivative 5 proved to be a rather selective inhibitor with a K(i) of 2.4 microM for homogenate of human spleen lysosomal beta-hexosaminidase.
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Affiliation(s)
- Richard J B H N van den Berg
- Leiden Institute of Chemistry, Gorlaeus Laboratories, University of Leiden, PO Box 9502, Leiden NL-2300 RA, The Netherlands
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32
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Facile conversion of 2-azetidinones to 2-piperidones: application to a formal synthesis of Prosopis and Cassia alkaloids. Tetrahedron 2003. [DOI: 10.1016/s0040-4020(03)01063-9] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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33
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Devel L, Hamon L, Becker H, Thellend A, Vidal-Cros A. Synthesis of protected 2-amino-2-deoxy-D-xylothionolactam derivatives and some aspects of their reactivity. Carbohydr Res 2003; 338:1591-601. [PMID: 12860430 DOI: 10.1016/s0008-6215(03)00239-8] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Abstract
The synthesis of polyfunctionalized delta-lactams as key intermediates of glycomimetics in the 2-acetamido-2-deoxy sugar series is presented. Starting from a chiral gamma-amino vinylic ester synthesized from Garner's aldehyde and after regioselective reduction, 1-azido-3-(N-tert-butyloxycarbonyl-2,2-dimethyloxazolidin-4-yl)-2-propene was obtained. Next, a cis-dihydroxylation reaction provided the protected D-xylitol and L-arabinitol azides. A simple protection-deprotection sequence, followed by an oxidation and a reductive cyclization, led to protected 2-amino-delta-lactams bearing a tert-butyloxycarbonyl group on the amine functionality. To explore the reactivity of such compounds, activation of the lactam into the corresponding thionolactam was performed. The resulting 2-amino-D-xylothionolactam derivative, a versatile intermediate, allowed access to a first generation of protected 2-amino-D-xylosamidoxime derivatives which are of interest as precursors of N-acetylhexosaminidase and N-acetylglucosaminyltransferase inhibitors. In this series of compounds, epimerization at C-2 was observed. AM(1) calculations performed on these analogs showed that they adopted a B(2,5) conformation and that the axial epimer was favored in the protected series whereas the equatorial epimer was preferred in the unprotected series.
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Affiliation(s)
- Laurent Devel
- Structure et Fonction de Molécules Bioactives, Université Pierre et Marie Curie, Tour 44-45, 3ème étage, 4 place Jussieu, F-75252 Paris, France
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Weintraub PM, Sabol JS, Kane JM, Borcherding DR. Recent advances in the synthesis of piperidones and piperidines. Tetrahedron 2003. [DOI: 10.1016/s0040-4020(03)00295-3] [Citation(s) in RCA: 320] [Impact Index Per Article: 15.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Squarcia A, Vivolo F, Weinig HG, Passacantilli P, Piancatelli G. Glycal-mediated syntheses of enantiomerically pure polyhydroxylated γ- and δ-lactams. Tetrahedron Lett 2002. [DOI: 10.1016/s0040-4039(02)00852-3] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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