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Široký M, Gonda J, Martinková M, Jacková D, Vilková M, Bindzár V, Kuchár J, Šesták S. Synthesis and mannosidase inhibitory profile of a small library of aminocyclitols from shikimic acid-derived scaffolds. Carbohydr Res 2020; 493:108027. [DOI: 10.1016/j.carres.2020.108027] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2020] [Revised: 04/28/2020] [Accepted: 04/28/2020] [Indexed: 12/18/2022]
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3
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Shashidhar MS, Krishnaswamy S. Intermolecular Acyl-Transfer Reactions in Molecular Crystals. Acc Chem Res 2019; 52:437-446. [PMID: 30698945 DOI: 10.1021/acs.accounts.8b00557] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
It is far more difficult to recognize and predict the chemical reactions that a molecule of an organic compound can undergo in crystalline (solid) state as compared to the solution state (the "organic functional group" approach), since the published data on solid-state structure-reactivity investigations and correlations are scant. The discovery of the first intermolecular acyl-transfer reaction in molecular crystals of racemic 2,4-di- O-benzoyl- myo-inositol-1,3,5-orthoformate (DiBz) during our attempts to develop methods for the synthesis of phosphoinositols, motivated us to find other molecular crystals capable of supporting similar reactions. Small changes to the molecular structure of DiBz yielded analogues with different crystal structures which showed varying degrees of acyl transfer reactivity as compared to the crystals of DiBz. A systematic investigation of the structures, polymorphism, cocrystallization behavior, and the corresponding reactivity of these crystals allowed us to correlate the acyl transfer reactivity with their structures and inherent noncovalent interactions and provided crucial insights into the mechanism of these reactions. Polymorphs or cocrystals of these compounds exhibited dissimilar reactivities due to differences in the molecular conformation and/or arrangements in their crystals. The knowledge of phase transitions between polymorphs enabled us to control and tune the reactivity in the solid state. We could identify three conditions essential for intermolecular acyl transfer: (i) favorable relative geometry of the electrophile (ester C═O) and the nucleophile (OH), (ii) noncovalent interactions (C-H···π) between the reacting molecules which help in maintaining the facility and specificity of the reaction, and (iii) the presence of channels in the lattice which enable propagation of the reaction in the crystal. Based on this supramolecular structure-reactivity correlation, we identified other molecular crystals (composed of molecules of widely different molecular structure from that of DiBz) from a survey of the Cambridge Structural Database (CSD) and predicted their acyl transfer reactivity. The increased availability of user-friendly modern X-ray diffractometers and related software has enabled efficient collection, analysis and interpretation of single crystal X-ray diffraction data, essential for such studies. The rapidly expanding CSD facilitates the identification of crystals with similar structures and reactivity patterns. In a wider perspective, facile reactions in molecular crystals fascinate chemists because these reactions usually exhibit unique product selectivity and have the potential to be developed as sustainable green reactions. We are optimistic that similar approaches for the study of other group transfer reactions in molecular crystals would augment and widen the scope of chemical reactions in molecular crystals in particular and the solid state in general. The ability to predict the reactivity of molecules in their crystals could find applications in organic synthesis, material science and industry. Realization of the involvement of inositol derivatives in cellular processes led to the discovery of cellular signal transduction mechanisms. The ability of inositol derivatives to support facile acyl-transfer reactions in the crystalline state might well have opened a new avenue for research in the area of organic solid-state reactions.
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Affiliation(s)
- Mysore S. Shashidhar
- Division of Organic Chemistry and the Academy of Scientific and Industrial Research, CSIR-National Chemical Laboratory, Pune 411008, India
| | - Shobhana Krishnaswamy
- Division of Organic Chemistry and the Academy of Scientific and Industrial Research, CSIR-National Chemical Laboratory, Pune 411008, India
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4
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Carrau G, Bellomo AI, Suescun L, Gonzalez D. Chemoenzymatic Synthesis of Hygromycin Aminocyclitol Moiety and its C2 Epimer. European J Org Chem 2019. [DOI: 10.1002/ejoc.201801424] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Gonzalo Carrau
- Departamento de Química Orgánica Facultad de Química Universidad de la República (UdelaR) Montevideo Uruguay
| | - Ana Inés Bellomo
- Centro de investigaciones en Bionanociencias (CIBION) Facultad de Química Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET) Argentina
| | - Leopoldo Suescun
- Laboratorio de Cristalografía estado sólido y materiales/Cátedra de Física/DETEMA/Facultad de Química Universidad de la República (UdelaR) Montevideo Uruguay
| | - David Gonzalez
- Departamento de Química Orgánica Facultad de Química Universidad de la República (UdelaR) Montevideo Uruguay
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Ricks TJ, Cassilly CD, Carr AJ, Alves DS, Alam S, Tscherch K, Yokley TW, Workman CE, Morrell-Falvey JL, Barrera FN, Reynolds TB, Best MD. Labeling of Phosphatidylinositol Lipid Products in Cells through Metabolic Engineering by Using a Clickable myo-Inositol Probe. Chembiochem 2018; 20:172-180. [PMID: 30098105 DOI: 10.1002/cbic.201800248] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2018] [Revised: 07/30/2018] [Indexed: 12/28/2022]
Abstract
Phosphatidylinositol (PI) lipids control critical biological processes, so aberrant biosynthesis often leads to disease. As a result, the capability to track the production and localization of these compounds in cells is vital for elucidating their complex roles. Herein, we report the design, synthesis, and application of clickable myo-inositol probe 1 a for bioorthogonal labeling of PI products. To validate this platform, we initially conducted PI synthase assays to show that 1 a inhibits PI production in vitro. Fluorescence microscopy experiments next showed probe-dependent imaging in T-24 human bladder cancer and Candida albicans cells. Growth studies in the latter showed that replacement of myo-inositol with probe 1 a led to an enhancement in cell growth. Finally, fluorescence-based TLC analysis and mass spectrometry experiments support the labeling of PI lipids. This approach provides a promising means for tracking the complex biosynthesis and trafficking of these lipids in cells.
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Affiliation(s)
- Tanei J Ricks
- Department of Chemistry, University of Tennessee, 1420 Circle Park Drive, Knoxville, TN, 37996, USA
| | - Chelsi D Cassilly
- Department of Microbiology, University of Tennessee, 1414 Cumberland Avenue, Knoxville, TN, 37996-0840, USA
| | - Adam J Carr
- Department of Chemistry, University of Tennessee, 1420 Circle Park Drive, Knoxville, TN, 37996, USA
| | - Daiane S Alves
- Department of Biochemistry and Cellular and Molecular Biology, University of Tennessee, 1414 Cumberland Avenue, Knoxville, TN, 37996-0840, USA
| | - Shahrina Alam
- Department of Chemistry, University of Tennessee, 1420 Circle Park Drive, Knoxville, TN, 37996, USA
| | - Kathrin Tscherch
- Department of Chemistry, University of Tennessee, 1420 Circle Park Drive, Knoxville, TN, 37996, USA
| | - Timothy W Yokley
- Department of Chemistry, University of Tennessee, 1420 Circle Park Drive, Knoxville, TN, 37996, USA
| | - Cameron E Workman
- Department of Chemistry, University of Tennessee, 1420 Circle Park Drive, Knoxville, TN, 37996, USA
| | | | - Francisco N Barrera
- Department of Biochemistry and Cellular and Molecular Biology, University of Tennessee, 1414 Cumberland Avenue, Knoxville, TN, 37996-0840, USA
| | - Todd B Reynolds
- Department of Microbiology, University of Tennessee, 1414 Cumberland Avenue, Knoxville, TN, 37996-0840, USA
| | - Michael D Best
- Department of Chemistry, University of Tennessee, 1420 Circle Park Drive, Knoxville, TN, 37996, USA
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6
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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.
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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.
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7
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Gurale BP, Shashidhar MS, Sardessai RS, Gonnade RG. Inositol to aromatics -benzene free synthesis of poly oxygenated aromatics. Carbohydr Res 2018; 461:38-44. [PMID: 29574293 DOI: 10.1016/j.carres.2018.03.007] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2018] [Revised: 03/13/2018] [Accepted: 03/13/2018] [Indexed: 11/28/2022]
Abstract
A method for the preparation of benzene derivatives from myo-inositol, an abundantly available phyto chemical is described. 1,3-Bridged acetals of inososes undergo step-wise elimination leading to the formation of polyoxygenated benzene derivatives. This aromatization reaction proceeds through the intermediacy of a β-alkoxyenone, which could be isolated. This sequence of reactions starting from myo-inositol, provides a novel route for the preparation of polyoxygenated benzene derivatives including polyoxygenated biphenyl. This scheme of synthesis demonstrates the potential of myo-inositol as a sustainable non-petrochemical resource for aromatic compounds.
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Affiliation(s)
- Bharat P Gurale
- The Division of Organic Chemistry, CSIR-National Chemical Laboratory, Pashan Road, Pune, 411 008, India.
| | - Mysore S Shashidhar
- 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
| | - Rajesh G Gonnade
- Center for Materials Characterization, CSIR- National Chemical Laboratory, Pashan Road, Pune, 411008, India.
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8
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Ravi A, Hassan SZ, Vanikrishna AN, Sureshan KM. Regioselective SN2 reactions for rapid syntheses of azido-inositols by one-pot sequence-specific nucleophilysis. Chem Commun (Camb) 2017; 53:3971-3973. [DOI: 10.1039/c7cc01219e] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Sequential nucleophilysis of myo-inositol-disulfonate provides easy access to azido-inositols.
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Affiliation(s)
- Arthi Ravi
- School of Chemistry
- Indian Institute of Science Education and Research Thiruvananthapuram
- Thiruvananthapuram-695016
- India
| | - Syed Zahid Hassan
- School of Chemistry
- Indian Institute of Science Education and Research Thiruvananthapuram
- Thiruvananthapuram-695016
- India
| | - Ajithkumar N. Vanikrishna
- School of Chemistry
- Indian Institute of Science Education and Research Thiruvananthapuram
- Thiruvananthapuram-695016
- India
| | - Kana M. Sureshan
- School of Chemistry
- Indian Institute of Science Education and Research Thiruvananthapuram
- Thiruvananthapuram-695016
- India
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Harit VK, Ramesh NG. A Chiron Approach to Diversity-Oriented Synthesis of Aminocyclitols, (−)-Conduramine F-4 and Polyhydroxyaminoazepanes from a Common Precursor. J Org Chem 2016; 81:11574-11586. [DOI: 10.1021/acs.joc.6b01790] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Vimal Kant Harit
- Department of Chemistry, Indian Institute of Technology Delhi, Hauz Khas, New Delhi 110016, India
| | - Namakkal G. Ramesh
- Department of Chemistry, Indian Institute of Technology Delhi, Hauz Khas, New Delhi 110016, India
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10
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Kaminishi T, Schedlbauer A, Fabbretti A, Brandi L, Ochoa-Lizarralde B, He CG, Milón P, Connell SR, Gualerzi CO, Fucini P. Crystallographic characterization of the ribosomal binding site and molecular mechanism of action of Hygromycin A. Nucleic Acids Res 2015; 43:10015-25. [PMID: 26464437 PMCID: PMC4787777 DOI: 10.1093/nar/gkv975] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2015] [Revised: 08/20/2015] [Accepted: 08/22/2015] [Indexed: 11/13/2022] Open
Abstract
Hygromycin A (HygA) binds to the large ribosomal subunit and inhibits its peptidyl transferase (PT) activity. The presented structural and biochemical data indicate that HygA does not interfere with the initial binding of aminoacyl-tRNA to the A site, but prevents its subsequent adjustment such that it fails to act as a substrate in the PT reaction. Structurally we demonstrate that HygA binds within the peptidyl transferase center (PTC) and induces a unique conformation. Specifically in its ribosomal binding site HygA would overlap and clash with aminoacyl-A76 ribose moiety and, therefore, its primary mode of action involves sterically restricting access of the incoming aminoacyl-tRNA to the PTC.
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MESH Headings
- Binding Sites
- Cinnamates/chemistry
- Cinnamates/metabolism
- Cinnamates/pharmacology
- Crystallography, X-Ray
- Hygromycin B/analogs & derivatives
- Hygromycin B/chemistry
- Hygromycin B/metabolism
- Hygromycin B/pharmacology
- Models, Molecular
- Peptidyl Transferases/chemistry
- Peptidyl Transferases/drug effects
- Protein Synthesis Inhibitors/chemistry
- Protein Synthesis Inhibitors/metabolism
- Protein Synthesis Inhibitors/pharmacology
- RNA, Transfer, Amino Acyl/metabolism
- Ribosome Subunits, Large, Bacterial/chemistry
- Ribosome Subunits, Large, Bacterial/drug effects
- Ribosome Subunits, Large, Bacterial/enzymology
- Ribosome Subunits, Large, Bacterial/metabolism
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Affiliation(s)
- Tatsuya Kaminishi
- Structural Biology Unit, CIC bioGUNE, Parque Tecnológico de Bizkaia, 48160 Derio, Bizkaia, Spain
| | - Andreas Schedlbauer
- Structural Biology Unit, CIC bioGUNE, Parque Tecnológico de Bizkaia, 48160 Derio, Bizkaia, Spain
| | - Attilio Fabbretti
- Laboratory of Genetics, Department of Biosciences and Veterinary Medicine, University of Camerino, 62032 Camerino, Italy
| | - Letizia Brandi
- Laboratory of Genetics, Department of Biosciences and Veterinary Medicine, University of Camerino, 62032 Camerino, Italy
| | - Borja Ochoa-Lizarralde
- Structural Biology Unit, CIC bioGUNE, Parque Tecnológico de Bizkaia, 48160 Derio, Bizkaia, Spain
| | - Cheng-Guang He
- Laboratory of Genetics, Department of Biosciences and Veterinary Medicine, University of Camerino, 62032 Camerino, Italy
| | - Pohl Milón
- School of Medicine, Faculty of Health Sciences, Universidad Peruana de Ciencias Aplicadas - UPC, Lima, L-33, Perú
| | - Sean R Connell
- Structural Biology Unit, CIC bioGUNE, Parque Tecnológico de Bizkaia, 48160 Derio, Bizkaia, Spain IKERBASQUE, Basque Foundation for Science, 48013 Bilbao, Spain
| | - Claudio O Gualerzi
- Laboratory of Genetics, Department of Biosciences and Veterinary Medicine, University of Camerino, 62032 Camerino, Italy
| | - Paola Fucini
- Structural Biology Unit, CIC bioGUNE, Parque Tecnológico de Bizkaia, 48160 Derio, Bizkaia, Spain IKERBASQUE, Basque Foundation for Science, 48013 Bilbao, Spain
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11
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12
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Worawalai W, Wacharasindhu S, Phuwapraisirisan P. N-Arylmethylaminoquercitols, a new series of effective antidiabetic agents having α-glucosidase inhibition and antioxidant activity. Bioorg Med Chem Lett 2015; 25:2570-3. [PMID: 25959812 DOI: 10.1016/j.bmcl.2015.04.033] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2015] [Revised: 04/07/2015] [Accepted: 04/11/2015] [Indexed: 11/19/2022]
Abstract
A new series of N-arylalkylaminoquercitols were synthesized by reductive amination of aminoquercitol bisacetonide 5 and a variety of aryl aldehydes. The targeted N-substituted aminoquercitols having phenolic moiety (7a-7c) displayed significantly enhanced α-glucosidase inhibition, which is 26-32 times more potent than that of the unmodified aminoquercitol 6. In addition, compounds 7a-7c also retained antioxidant activity with relatively more pronounced potency than their original phenolics. This recent finding suggests an approach to develop effective antidiabetic agents by incorporating antioxidative moiety into aminocyclitol core structure.
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Affiliation(s)
- Wisuttaya Worawalai
- Natural Products Research Unit, Department of Chemistry, Faculty of Science, Chulalongkorn University, Bangkok 10330, Thailand
| | - Sumrit Wacharasindhu
- Natural Products Research Unit, Department of Chemistry, Faculty of Science, Chulalongkorn University, Bangkok 10330, Thailand
| | - Preecha Phuwapraisirisan
- Natural Products Research Unit, Department of Chemistry, Faculty of Science, Chulalongkorn University, Bangkok 10330, Thailand.
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13
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Worawalai W, Wacharasindhu S, Phuwapraisirisan P. Amine-linked diquercitols as new α-glucosidase inhibitors. Bioorg Med Chem Lett 2014; 24:5530-3. [DOI: 10.1016/j.bmcl.2014.09.064] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2014] [Revised: 09/08/2014] [Accepted: 09/24/2014] [Indexed: 10/24/2022]
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14
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Gurale BP, Sardessai RS, Shashidhar MS. myo-Inositol 1,3-acetals as early intermediates during the synthesis of cyclitol derivatives. Carbohydr Res 2014; 399:8-14. [PMID: 25216930 DOI: 10.1016/j.carres.2014.08.010] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2014] [Revised: 08/12/2014] [Accepted: 08/13/2014] [Indexed: 10/24/2022]
Abstract
Synthetic sequences starting from commercially available myo-inositol necessarily involve protection-deprotection strategies of its six hydroxyl groups. Several strategies have been developed/attempted over the last several decades leading to the synthesis of naturally occurring phosphoinositols, their analogs, and cyclitol derivatives. Of late, myo-inositol 1,3-acetals, which can be obtained by the reductive cleavage of myo-inositol orthoesters have emerged as early intermediates for the synthesis of phosphorylated and other inositol derivatives. This mini-review is an attempt to illustrate the economy and convenience of using myo-inositol 1,3-acetals as early intermediates during syntheses from myo-inositol.
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Affiliation(s)
- Bharat P Gurale
- Division of Organic Chemistry, CSIR-National Chemical Laboratory, Pashan Road, Pune 411 008, India
| | - Richa S Sardessai
- Division of Organic Chemistry, CSIR-National Chemical Laboratory, Pashan Road, Pune 411 008, India
| | - Mysore S Shashidhar
- Division of Organic Chemistry, CSIR-National Chemical Laboratory, Pashan Road, Pune 411 008, India.
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15
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Lee AMM, Painter GF, Compton BJ, Larsen DS. Resolution of orthogonally protected myo-inositols with novozym 435 providing an enantioconvergent pathway to Ac2PIM1. J Org Chem 2014; 79:10916-31. [PMID: 25338261 DOI: 10.1021/jo5019188] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Orthogonally protected chiral myo-inositol derivatives are important intermediates for higher order myo-inositol-containing compounds. Here, the use of the immobilized enzyme Novozym 435 to efficiently catalyze the acetylation of the 5R configured enantiomer of racemic 1,2-O-isopropylidene-myo-inositols possessing chemically and sterically diverse protecting groups at O-3 and O-6 is described. The resolutions were successful with allyl, benzyl, 4-bromo-, 4-methoxy-, 4-nitro-, and 4-(3,4-dimethoxyphenyl)benzyl, propyl, and propargyl protection at O-6 in combination with either allyl or benzyl groups at O-3. Bulky protecting groups slow the rate of acetylation. No reaction was observed for 3,6-di-O-triisopropylsilyl-1,2-O-isopropylidene-myo-inositol. The utility of this methodology was demonstrated by the first reported synthesis of an Ac2PIM1 (9), which used both enantiomers of the resolved 3-O-allyl-6-O-benzyl-1,2-O-isopropylidene-myo-inositol in a convergent synthesis.
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Affiliation(s)
- Alastair M M Lee
- Department of Chemistry, University of Otago , P.O. Box 56, Dunedin, New Zealand
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16
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Griffen JA, White JC, Kociok-Köhn G, Lloyd MD, Wells A, Arnot TC, Lewis SE. New aminocyclitols with quaternary stereocentres via acylnitroso cycloaddition with an ipso,ortho arene dihydrodiol. Tetrahedron 2013. [DOI: 10.1016/j.tet.2013.04.033] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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18
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The orientation of the β-hydroxyl group controls the diastereoselectivity during the hydride reduction and Grignard reaction of inososes. Tetrahedron 2013. [DOI: 10.1016/j.tet.2013.04.081] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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19
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Vidyasagar A, Pathigoolla A, Sureshan KM. Chemoselective alcoholysis/acetolysis of trans-ketals over cis-ketals and its application in the total synthesis of the cellular second messenger, d-myo-inositol-1,4,5-trisphosphate. Org Biomol Chem 2013; 11:5443-53. [DOI: 10.1039/c3ob40789f] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Affiliation(s)
- Adiyala Vidyasagar
- School of Chemistry, Indian Institute of Science Education and Research, Thiruvananthapuram 695016, India
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20
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Vibhute AM, Sureshan KM. H2SO4-silica: an eco-friendly heterogeneous catalyst for the differential protection of myo-inositol hydroxyl groups. RSC Adv 2013. [DOI: 10.1039/c3ra40506k] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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21
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Lo HJ, Chang YK, Yan TH. Chiral pool based efficient synthesis of the aminocyclitol core and furanoside of (-)-hygromycin A: formal total synthesis of (-)-hygromycin A. Org Lett 2012; 14:5896-9. [PMID: 23148861 DOI: 10.1021/ol3028237] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A chiral pool based synthetic strategy that leads from the readily available and inexpensive C(2)-symmetric tartaric acids to the chiral O-isopropylidenebenzooxazole--a convenient precursor to the aminocyclitol core of hygromycin A as well as the chiral γ-disilyloxybutyrolactone--a pivotal intermediate to approach to the furanoside of hygromycin A.
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Affiliation(s)
- Hong-Jay Lo
- Department of Chemistry, National Chung-Hsing University, Taichung 400, Taiwan, Republic of China
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