1
|
Shakeel-u-Rehman, Bhat KA, Lone SH, Malik FA. Click chemistry inspired facile synthesis and bioevaluation of novel triazolyl analogs of D-(+)-pinitol. ARAB J CHEM 2019. [DOI: 10.1016/j.arabjc.2015.10.009] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022] Open
|
2
|
Sarkar N, Sardessai RS, Shashidhar MS, Tamboli MI, Gonnade RG. Lithium hydride as an efficient reagent for the preparation of 1,2-anhydro inositols: Does the reaction proceed through 'axial rich' conformation? Carbohydr Res 2018; 463:32-36. [PMID: 29751207 DOI: 10.1016/j.carres.2018.04.014] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2018] [Revised: 04/20/2018] [Accepted: 04/25/2018] [Indexed: 11/16/2022]
Abstract
scyllo-Inositol derived 1,2-trans-diequatorial halohydrins can be efficiently converted to the corresponding epoxides in the presence of lithium hydride. The structure of one of the epoxides was determined by single crystal X-ray diffraction analysis. This provides a potential route for the preparation of ring modified inositol derivatives. DFT calculations suggest that this epoxide formation could be proceeding through the intermediacy of the cyclohexane ring-inverted axial-rich conformer (1,2-trans-diaxial halohydrin). This is supported by the results of DFT calculations on the formation of inositol orthoformate, where the product is locked in the axial-rich conformation, while the starting inositol has the equatorial-rich conformation.
Collapse
Affiliation(s)
- Nitai Sarkar
- Academy of Scientific and Innovative Research (AcSIR), India; The Division of Organic Chemistry, CSIR-National Chemical Laboratory, Pashan Road, Pune 411 008, India.
| | - Richa S Sardessai
- The Division of Organic Chemistry, CSIR-National Chemical Laboratory, Pashan Road, Pune 411 008, India.
| | - Mysore S Shashidhar
- Academy of Scientific and Innovative Research (AcSIR), India; The Division of Organic Chemistry, CSIR-National Chemical Laboratory, Pashan Road, Pune 411 008, India.
| | - Majid I Tamboli
- The Division of Organic Chemistry, CSIR-National Chemical Laboratory, Pashan Road, Pune 411 008, India.
| | - Rajesh G Gonnade
- Academy of Scientific and Innovative Research (AcSIR), India; Center for Materials Characterization, CSIR- National Chemical Laboratory, Pashan Road, Pune 411008, India.
| |
Collapse
|
3
|
Zaini PA, Nascimento R, Gouran H, Cantu D, Chakraborty S, Phu M, Goulart LR, Dandekar AM. Molecular Profiling of Pierce's Disease Outlines the Response Circuitry of Vitis vinifera to Xylella fastidiosa Infection. FRONTIERS IN PLANT SCIENCE 2018; 9:771. [PMID: 29937771 PMCID: PMC6002507 DOI: 10.3389/fpls.2018.00771] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/17/2018] [Accepted: 05/18/2018] [Indexed: 05/19/2023]
Abstract
Pierce's disease is a major threat to grapevines caused by the bacterium Xylella fastidiosa. Although devoid of a type 3 secretion system commonly employed by bacterial pathogens to deliver effectors inside host cells, this pathogen is able to influence host parenchymal cells from the xylem lumen by secreting a battery of hydrolytic enzymes. Defining the cellular and biochemical changes induced during disease can foster the development of novel therapeutic strategies aimed at reducing the pathogen fitness and increasing plant health. To this end, we investigated the transcriptional, proteomic, and metabolomic responses of diseased Vitis vinifera compared to healthy plants. We found that several antioxidant strategies were induced, including the accumulation of gamma-aminobutyric acid (GABA) and polyamine metabolism, as well as iron and copper chelation, but these were insufficient to protect the plant from chronic oxidative stress and disease symptom development. Notable upregulation of phytoalexins, pathogenesis-related proteins, and various aromatic acid metabolites was part of the host responses observed. Moreover, upregulation of various cell wall modification enzymes followed the proliferation of the pathogen within xylem vessels, consistent with the intensive thickening of vessels' secondary walls observed by magnetic resonance imaging. By interpreting the molecular profile changes taking place in symptomatic tissues, we report a set of molecular markers that can be further explored to aid in disease detection, breeding for resistance, and developing therapeutics.
Collapse
Affiliation(s)
- Paulo A. Zaini
- Department of Plant Sciences, University of California, Davis, Davis, CA, United States
| | - Rafael Nascimento
- Institute of Genetics and Biochemistry, Federal University of Uberlândia, Uberlândia, Brazil
| | - Hossein Gouran
- Department of Plant Sciences, University of California, Davis, Davis, CA, United States
| | - Dario Cantu
- Department of Viticulture and Enology, University of California, Davis, Davis, CA, United States
| | - Sandeep Chakraborty
- Department of Plant Sciences, University of California, Davis, Davis, CA, United States
| | - My Phu
- Department of Plant Sciences, University of California, Davis, Davis, CA, United States
| | - Luiz R. Goulart
- Institute of Genetics and Biochemistry, Federal University of Uberlândia, Uberlândia, Brazil
| | - Abhaya M. Dandekar
- Department of Plant Sciences, University of California, Davis, Davis, CA, United States
- *Correspondence: Abhaya M. Dandekar,
| |
Collapse
|
4
|
Wang D, Zhang S, Chang Z, Kong DX, Zuo Z. Quebrachitol: Global Status and Basic Research. NATURAL PRODUCTS AND BIOPROSPECTING 2017; 7:113-122. [PMID: 28132388 PMCID: PMC5315676 DOI: 10.1007/s13659-017-0120-3] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/23/2016] [Accepted: 01/02/2017] [Indexed: 05/17/2023]
Abstract
Recently, there has been a renewed interest in the natural-products-inspired drugs. Quebrachitol (QCT) is one of naturally occurring optically active cyclitols that has now received considerable attention. Until the last decade, it came to be a starting point for the lead discovery. In this review, we had a discussion on the basic research of QCT, including its source, structure, properties, and the recent advances on its application. The biological activities and QCT-inspired leads that are potentially effective for treating human diseases were also discussed.
Collapse
Affiliation(s)
- Dong Wang
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, 650201, China
| | - Shuqun Zhang
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, 650201, China
| | - Zhe Chang
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, 650201, China
| | - De-Xin Kong
- State Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan, 430070, China.
| | - Zhili Zuo
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, 650201, China.
- Yunnan Key Laboratory of Natural Medicinal Chemistry, Kunming, 650201, China.
| |
Collapse
|
5
|
Rendle P, Kassibawi F, Johnston K, Hart J, Cameron S, Falshaw A, Painter G, Loomes K. Synthesis and biological activities of d - chiro -inositol analogues with insulin-like actions. Eur J Med Chem 2016; 122:442-451. [DOI: 10.1016/j.ejmech.2016.06.047] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2015] [Revised: 06/23/2016] [Accepted: 06/25/2016] [Indexed: 10/21/2022]
|
6
|
Trant JF, Hudlicky T. Ring-opening of hindered cyclic epoxides with potassium carboxylates in the presence of conjugate acids. CAN J CHEM 2013. [DOI: 10.1139/cjc-2013-0386] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
During attempts to ring-open a highly hindered epoxide, traditional methods were found to be ineffective. An alternative strategy for opening epoxides was implemented that employed a potassium carboxylate in the presence of its conjugate acid in a solvent mixture containing polar and potassium-sequestering components. A systematic analysis of the components of the reaction mixture indicated that the addition of the conjugate acid was the most important feature for providing good conversion. This reaction appears to be general for most classes of carboxylic acids including cinnamic, aromatic, and highly hindered carboxylic acids (30%–79% yield) and only fails with weak carboxylate nucleophiles. Three highly substituted and hindered cyclohexene oxide derivatives were examined for reactivity and the reaction conditions appear to tolerate a variety of functional groups to provide the ring-opened species. This pH-moderate system proved useful for hindered cyclic epoxides when all other techniques failed and should prove general to a wide spectrum of epoxide and carboxylic acid partners in those cases where the use of a strong Lewis or protic acid catalyst, or a strong basic nucleophile, is inappropriate.
Collapse
Affiliation(s)
- John F. Trant
- Department of Chemistry and Centre for Biotechnology, Brock University, 500 Glenridge Avenue, St. Catharines, ON L2S 3A1, Canada
| | - Tomas Hudlicky
- Department of Chemistry and Centre for Biotechnology, Brock University, 500 Glenridge Avenue, St. Catharines, ON L2S 3A1, Canada
| |
Collapse
|
7
|
Gielen F, van Vliet L, Koprowski BT, Devenish SRA, Fischlechner M, Edel JB, Niu X, deMello AJ, Hollfelder F. A fully unsupervised compartment-on-demand platform for precise nanoliter assays of time-dependent steady-state enzyme kinetics and inhibition. Anal Chem 2013; 85:4761-9. [PMID: 23614771 PMCID: PMC3715888 DOI: 10.1021/ac400480z] [Citation(s) in RCA: 78] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
![]()
The ability to miniaturize biochemical
assays in water-in-oil emulsion
droplets allows a massive scale-down of reaction volumes, so that
high-throughput experimentation can be performed more economically
and more efficiently. Generating such droplets in compartment-on-demand
(COD) platforms is the basis for rapid, automated screening of chemical
and biological libraries with minimal volume consumption. Herein,
we describe the implementation of such a COD platform to perform high
precision nanoliter assays. The coupling of a COD platform to a droplet
absorbance detection set-up results in a fully automated analytical
system. Michaelis–Menten parameters of 4-nitrophenyl glucopyranoside
hydrolysis by sweet almond β-glucosidase can be generated based
on 24 time-courses taken at different substrate concentrations with
a total volume consumption of only 1.4 μL. Importantly, kinetic
parameters can be derived in a fully unsupervised manner within 20
min: droplet production (5 min), initial reading of the droplet sequence
(5 min), and droplet fusion to initiate the reaction and read-out
over time (10 min). Similarly, the inhibition of the enzymatic reaction
by conduritol B epoxide and 1-deoxynojirimycin was measured, and Ki values were determined. In both cases, the
kinetic parameters obtained in droplets were identical within error
to values obtained in titer plates, despite a >104-fold
volume reduction, from micro- to nanoliters.
Collapse
Affiliation(s)
- Fabrice Gielen
- Department of Biochemistry, University of Cambridge, Cambridge, United Kingdom
| | | | | | | | | | | | | | | | | |
Collapse
|
8
|
Pistarà V, Lombardo GM, Rescifina A, Bacchi A, D’Andrea F, Punzo F. Experimental and in silico characterization of a biologically active inosose. Struct Chem 2013. [DOI: 10.1007/s11224-013-0221-5] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
|
9
|
|
10
|
Discovery of new β-d-glucosidase inhibitors via pharmacophore modeling and QSAR analysis followed by in silico screening. J Mol Model 2010; 17:443-64. [PMID: 20490878 DOI: 10.1007/s00894-010-0737-1] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2010] [Accepted: 04/28/2010] [Indexed: 10/19/2022]
|
11
|
Risseeuw MDP, van den Berg RJBHN, Donker-Koopman WE, van der Marel GA, Aerts JMFG, Overhand M, Overkleeft HS. Synthesis and evaluation of D-gluco-pyranocyclopropyl amines as potential glucosidase inhibitors. Bioorg Med Chem Lett 2009; 19:6600-3. [PMID: 19853441 DOI: 10.1016/j.bmcl.2009.10.022] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2009] [Revised: 10/05/2009] [Accepted: 10/06/2009] [Indexed: 10/20/2022]
Abstract
In the recent past sugar-derived cyclopropylamines were proposed as structurally new glycosidase inhibitors. In this Letter we report our efforts in the synthesis of a set of alpha-glucose configured oxabicyclo[4.1.0] heptanes, based on this hypothesis, bearing an amine substituent on the propyl ring and reveal that their inhibitory potential towards a range of mammalian glucosidases is modest.
Collapse
Affiliation(s)
- Martijn D P Risseeuw
- Leiden Institute of Chemistry, Leiden University, Gorlaeus Laboratories, Einsteinweg 55, 2300 RA Leiden, The Netherlands
| | | | | | | | | | | | | |
Collapse
|
12
|
Semi-synthetic analogs of pinitol as potential inhibitors of TNF-α cytokine expression in human neutrophils. Bioorg Med Chem Lett 2009; 19:1939-43. [DOI: 10.1016/j.bmcl.2009.02.050] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2008] [Revised: 01/22/2009] [Accepted: 02/12/2009] [Indexed: 11/19/2022]
|
13
|
Gonzalez-Bulnes P, Casas J, Delgado A, Llebaria A. Practical synthesis of (−)-1-amino-1-deoxy-myo-inositol from achiral precursors. Carbohydr Res 2007; 342:1947-52. [PMID: 17524374 DOI: 10.1016/j.carres.2007.04.024] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2007] [Revised: 04/13/2007] [Accepted: 04/22/2007] [Indexed: 11/30/2022]
Abstract
A new synthesis of enantiomerically pure 1-amino-1-deoxy-myo-inositol is reported. The route described employs p-benzoquinone, an achiral compound, as the starting material to give conduritol B tetraacetate in three steps. Kinetic resolution of this compound using a palladium catalyst with a chiral ligand allows access to a conduritol B tetraester in high enantiomeric excess. This compound is transformed into tetrabenzyl conduritol B epoxide, which is regioselectively opened with azide to give the key azidocyclitol. Final transformation into (-)-1-amino-1-deoxy-myo-inositol hydrochloride is achieved in four synthetic steps. This sequence allows the synthesis of this compound in high enantiomeric purity in a semi-preparative scale.
Collapse
Affiliation(s)
- Patricia Gonzalez-Bulnes
- Research Unit on Bioactive Molecules (RUBAM), Departament de Química Orgànica Biològica, Institut d' Investigacions Químiques, i Ambientals de Barcelona (IIQAB-CSIC), Jordi Girona 18-26, 08034 Barcelona, Spain
| | | | | | | |
Collapse
|
14
|
Salazar MO, Furlan RLE. A rapid TLC autographic method for the detection of glucosidase inhibitors. PHYTOCHEMICAL ANALYSIS : PCA 2007; 18:209-12. [PMID: 17500363 DOI: 10.1002/pca.971] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/15/2023]
Abstract
A new bioautographic assay suitable for the localisation of beta-glucosidase inhibitors present in a complex matrix is described. Enzyme activity was detected using esculin as the substrate to produce esculetin, which reacts with ferric ion to form a brown complex.
Collapse
Affiliation(s)
- Mario O Salazar
- Catedra de Farmacognosia, Facultad de Ciencias Bioquímicas y Farmacéuticas, Universidad Nacional de Rosario, Suipacha 531, S2002LRK Rosario, Argentina
| | | |
Collapse
|
15
|
Falshaw A, Gainsford GJ, Lensink C, Slade AT, Wright LJ. Ruthenium complexes that incorporate a chiro-inositol derived diphosphinite ligand as catalysts for asymmetric hydrogenation reactions. Polyhedron 2007. [DOI: 10.1016/j.poly.2006.06.016] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
|
16
|
|
17
|
Synthesis of cyclophellitol utilizing a palladium chloride mediated-Ferrier-II rearrangement. Molecules 2005; 10:901-11. [PMID: 18007359 PMCID: PMC6147719 DOI: 10.3390/10080901] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2005] [Accepted: 01/05/2005] [Indexed: 11/17/2022] Open
Abstract
Cyclophellitol and its C3-epimer have been synthesized from5-enoglucopyranoside and 5-enomannopyranoside, respectively. The carbocyclic skeletonwas constructed through a Ferrier-II reaction meditated by PdCl2.
Collapse
|
18
|
Painter GF, Eldridge PJ, Falshaw A. Syntheses of tetrahydroxyazepanes from chiro-inositols and their evaluation as glycosidase inhibitors. Bioorg Med Chem 2004; 12:225-32. [PMID: 14697787 DOI: 10.1016/j.bmc.2003.10.003] [Citation(s) in RCA: 48] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
Two pairs of C(2)-symmetric tetrahydroxyazepanes [(-), (+)-1 and (-), (+)-2] have been synthesized from the enantiomeric chiro-inositols and evaluated as glycosidase inhibitors. Alternative syntheses of ido-tetrahydroxyazepanes (-)- and (+)-2 from myo-inositol were also developed. The key synthetic transformations were glycol fission and cyclization of the derived dialdehydes by double reductive amination. The D-manno-tetrahydroxyazepane [(-)-1] showed selective inhibition of alpha-L-fucosidase and beta-D-galactosidase, while the enantiomer [(+)-1] was a selective inhibitor of an alpha-D-galactosidase. In contrast, the L-ido-tetrahydroxyazepane (+)-2 was a broad spectrum hexosidase inhibitor, but showed none of the reported hexosaminidase inhibition. Its enantiomer (-)-2 is a poor hexosidase inhibitor.
Collapse
Affiliation(s)
- Gavin F Painter
- Carbohydrate Chemistry, Industrial Research Limited, PO Box 31-310, Lower Hutt, New Zealand.
| | | | | |
Collapse
|
19
|
Abstract
We have described the synthesis of (+)-(2R,3S,4R)-2,3,4-trihydroxycyclohexanone by the reduction of a keto-conduritol derivative, the latter being prepared in five steps from (-)-(2S,3R,4S,5S)-2,3,4-tribenzyloxy-5-hydroxycyclohexanone, which is in turn readily synthesized from D-glucose.
Collapse
Affiliation(s)
- Ivone Carvalho
- Departamento de Ciências Farmacêuticas, Faculdade de Ciências Farmacêuticas de Ribeirão Preto, Universidade de São Paulo, Av. do Café s/n, Monte Alegre, 14040-903 Ribeirão, Preto, SP, Brazil.
| | | |
Collapse
|
20
|
Sureshan KM, Shashidhar MS, Praveen T, Das T. Regioselective Protection and Deprotection of Inositol Hydroxyl Groups. Chem Rev 2003; 103:4477-503. [PMID: 14611268 DOI: 10.1021/cr0200724] [Citation(s) in RCA: 131] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Kana M Sureshan
- Division of Organic Synthesis, National Chemical Laboratory, Pune 411 008, India
| | | | | | | |
Collapse
|
21
|
Cid M, Bonilla J, Dumarçay S, Alfonso F, Martín-Lomas M. New Synthesis of 1-D-O-(2-Amino-2-deoxy-D-gluco- and -galactopyranosyl)-chiro-inositols. European J Org Chem 2002. [DOI: 10.1002/1099-0690(200203)2002:5<881::aid-ejoc881>3.0.co;2-z] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
|