1
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Mas-Roselló J, Tenor H, Szabo T, Naef R, Sieber S, Gademann K. Bifunctional Sildenafil Diazeniumdiolates Acting as Phosphodiesterase 5 Inhibitors and Nitric Oxide Donors- Towards Wound Healing. Chembiochem 2024; 25:e202300801. [PMID: 38430555 DOI: 10.1002/cbic.202300801] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2023] [Revised: 02/29/2024] [Accepted: 02/29/2024] [Indexed: 03/04/2024]
Abstract
Inefficient wound healing poses a global health challenge with a lack of efficient treatments. Wound healing issues often correlate with low endogenous nitric oxide (NO) levels. While exogenous delivery with NO-releasing compounds represents a promising therapeutic strategy, controlling the release of the highly reactive NO remains challenging. Phosphodiesterase 5 (PDE5) inhibitors, like sildenafil, have also been shown to promote wound healing. This study explores hybrid compounds, combining NO-releasing diazeniumdiolates with a sildenafil-derived PDE5 inhibitor. One compound demonstrated a favorable NO-release profile, triggered by an esterase (prodrug), and displayed in vitro nanomolar inhibition potency against PDE5 and thrombin-induced platelet aggregation. Both factors are known to promote blood flow and oxygenation. Thus, our findings unveil promising prospects for effective wound healing treatments.
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Affiliation(s)
- Josep Mas-Roselló
- Department of Chemistry, University of Zurich, 8057, Zurich, Switzerland
| | - Hermann Tenor
- Topadur Pharma AG, Grabenstrasse 11A, 8952, Schlieren, Switzerland
| | - Timea Szabo
- Department of Chemistry, University of Zurich, 8057, Zurich, Switzerland
| | - Reto Naef
- Topadur Pharma AG, Grabenstrasse 11A, 8952, Schlieren, Switzerland
| | - Simon Sieber
- Department of Chemistry, University of Zurich, 8057, Zurich, Switzerland
| | - Karl Gademann
- Department of Chemistry, University of Zurich, 8057, Zurich, Switzerland
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2
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Sahoo SS, Kataria P, Kontham R. Concise and collective total syntheses of 2,4-disubstituted furan-derived natural products from hydroxyoxetanyl ketones. Org Biomol Chem 2024; 22:1475-1483. [PMID: 38284832 DOI: 10.1039/d3ob01924a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2024]
Abstract
The furan moiety, prevalent in bioactive natural products and essential drugs, presents intriguing structural features that have spurred our exploration into streamlined chemical synthesis routes for related natural products. In this study, we demonstrate the concise total synthesis of eight 2,4-disubstituted furan-derived natural products (including methylfuroic acid, rabdoketones A and B, paleofurans A and B, tournefolin C, and shikonofurans A and B). Our methodology revolves around the utilization of hydroxyoxetanyl ketones as pivotal intermediates. The approach encompasses transformations such as selective organo-catalyzed cross-ketol addition, synthesis of hydroxymethyl-tethered furans through Bi(OTf)3 catalyzed dehydrative cycloisomerization of α-hydroxyoxetanyl ketones, and a hydrogen atom transfer (HAT)-mediated oxidation of primary alcohols into the corresponding acids. This comprehensive synthetic strategy highlights the versatility of hydroxyoxetanyl ketones as invaluable building blocks in the synthesis of furan-containing natural products.
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Affiliation(s)
- Shubhranshu Shekhar Sahoo
- Organic Chemistry Division, CSIR-National Chemical Laboratory, Dr Homi Bhabha Road, Pune-411008, India.
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad-201002, India
| | - Priyanka Kataria
- Organic Chemistry Division, CSIR-National Chemical Laboratory, Dr Homi Bhabha Road, Pune-411008, India.
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad-201002, India
| | - Ravindar Kontham
- Organic Chemistry Division, CSIR-National Chemical Laboratory, Dr Homi Bhabha Road, Pune-411008, India.
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad-201002, India
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3
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Palladium Nanoparticles on Chitosan-Coated Superparamagnetic Manganese Ferrite: A Biocompatible Heterogeneous Catalyst for Nitroarene Reduction and Allyl Carbamate Deprotection. Polymers (Basel) 2023; 15:polym15010232. [PMID: 36616581 PMCID: PMC9824173 DOI: 10.3390/polym15010232] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2022] [Revised: 10/27/2022] [Accepted: 10/30/2022] [Indexed: 01/03/2023] Open
Abstract
Although metallic nanocatalysts such as palladium nanoparticles (Pd NPs) are known to possess higher catalytic activity due to their large surface-to-volume ratio, however, in nanosize greatly reducing their activity due to aggregation. To overcome this challenge, superparamagnetic chitosan-coated manganese ferrite was successfully prepared and used as a support for the immobilization of palladium nanoparticles to overcome the above-mentioned challenge. The Pd-Chit@MnFe2O4 catalyst exhibited high catalytic activity in 4-nitrophenol and 4-nitroaniline reductions, with respective turnover frequencies of 357.1 min-1 and 571.4 min-1, respectively. The catalyst can also be recovered easily by magnetic separation after each reaction. Additionally, the Pd-Chit@MnFe2O4 catalyst performed well in the reductive deprotection of allyl carbamate. Coating the catalyst with chitosan reduced the Pd leaching and its cytotoxicity. Therefore, the catalytic activity of Pd-Chit@MnFe2O4 was proven to be unrestricted in biology conditions.
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4
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Yang F, Nie YC, Liu HY, Zhang L, Mo F, Zhu R. Electrocatalytic Oxidative Hydrofunctionalization Reactions of Alkenes via Co(II/III/IV) Cycle. ACS Catal 2022. [DOI: 10.1021/acscatal.1c05557] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Fan Yang
- Beijing National Laboratory for Molecular Sciences (BNLMS), Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China
| | - Yi-Chen Nie
- Beijing National Laboratory for Molecular Sciences (BNLMS), Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China
| | - Han-Yuan Liu
- Beijing National Laboratory for Molecular Sciences (BNLMS), Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China
| | - Lei Zhang
- Beijing National Laboratory for Molecular Sciences (BNLMS), Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China
| | - Fanyang Mo
- School of Materials Science and Engineering, Peking University, Beijing 100871, China
| | - Rong Zhu
- Beijing National Laboratory for Molecular Sciences (BNLMS), Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China
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5
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Zhou C, Xu Z, Li G, Gao Q, Sui Q, Li T. Efficient synthesis of monophosphoryl lipid A mimetic RC-529. J Carbohydr Chem 2021. [DOI: 10.1080/07328303.2021.2016793] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
- Chengkai Zhou
- Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, China
- Shanghai University of Engineering Science, Shanghai, China
| | - Zhuojia Xu
- Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, China
- University of Chinese Academy of Sciences, Beijing, China
| | - Gen Li
- China State Institute of Pharmaceutical Industry, Shanghai, China
| | - Qi Gao
- China State Institute of Pharmaceutical Industry, Shanghai, China
| | - Qiang Sui
- Shanghai University of Engineering Science, Shanghai, China
- China State Institute of Pharmaceutical Industry, Shanghai, China
| | - Tiehai Li
- Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, China
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6
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Pan W, Li C, Zhu H, Li F, Li T, Zhao W. A mild and practical method for deprotection of aryl methyl/benzyl/allyl ethers with HPPh 2 and tBuOK. Org Biomol Chem 2021; 19:7633-7640. [PMID: 34524311 DOI: 10.1039/d1ob01286j] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A general method for the demethylation, debenzylation, and deallylation of aryl ethers using HPPh2 and tBuOK is reported. The reaction features mild and metal-free reaction conditions, broad substrate scope, good functional group compatibility, and high chemical selectivity towards aryl ethers over aliphatic structures. Notably, this approach is competent to selectively deprotect the allyl or benzyl group, making it a general and practical method in organic synthesis.
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Affiliation(s)
- Wenjing Pan
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha, Hunan 410082, China.
| | - Chenchen Li
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha, Hunan 410082, China.
| | - Haoyin Zhu
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha, Hunan 410082, China.
| | - Fangfang Li
- The Department of Dermatology, Xiangya Hospital, Central South University, Changsha, Hunan 410008, China.
| | - Tao Li
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha, Hunan 410082, China.
| | - Wanxiang Zhao
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha, Hunan 410082, China.
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7
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Gaikwad SV, Gaikwad MV, Lokhande PD. Iodine‐DMSO
catalyzed chemoselective oxidative aromatization and deallylation, nondeallylation of aryl allyl ether of tetrahydro‐
β
‐carboline. J Heterocycl Chem 2021. [DOI: 10.1002/jhet.4265] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Sunil V. Gaikwad
- Department of Chemistry, Centre for Advanced Research Savitribai Phule Pune University Pune India
| | - Milind V. Gaikwad
- Department of Chemistry, Dr. D. Y. Patil A.C.S. College Pimpri Savitribai Phule Pune University Pune India
| | - Pradeep D. Lokhande
- Department of Chemistry, Centre for Advanced Research Savitribai Phule Pune University Pune India
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8
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Tang TM, Liu M, Wu H, Gou T, Hu X, Wang BQ, Hu P, Song F, Huang G. Pd-Catalyzed tandem C–C/C–O/C–H single bond cleavage of 3-allyloxybenzocyclobutenols. Org Chem Front 2021. [DOI: 10.1039/d0qo01619e] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A Pd-catalyzed skeletal rearrangement of 3-allyloxybenzocyclobutenols was achieved, which involved tandem C–C/C–O bond cleavage and C–H allylic substitution.
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Affiliation(s)
- Tian-Mu Tang
- College of Chemistry and Materials Science
- Sichuan Normal University
- Chengdu
- P. R. China
| | - Min Liu
- College of Chemistry and Materials Science
- Sichuan Normal University
- Chengdu
- P. R. China
| | - Hongli Wu
- Department of Chemistry
- School of Science and Tianjin Key Laboratory of Molecular Optoelectronic Sciences
- Tianjin University
- Tianjin 300072
- P. R. China
| | - Ting Gou
- College of Chemistry and Materials Science
- Sichuan Normal University
- Chengdu
- P. R. China
| | - Xi Hu
- College of Chemistry and Materials Science
- Sichuan Normal University
- Chengdu
- P. R. China
| | - Bi-Qin Wang
- College of Chemistry and Materials Science
- Sichuan Normal University
- Chengdu
- P. R. China
| | - Ping Hu
- College of Chemistry and Materials Science
- Sichuan Normal University
- Chengdu
- P. R. China
| | - Feijie Song
- College of Chemistry and Materials Science
- Sichuan Normal University
- Chengdu
- P. R. China
| | - Genping Huang
- Department of Chemistry
- School of Science and Tianjin Key Laboratory of Molecular Optoelectronic Sciences
- Tianjin University
- Tianjin 300072
- P. R. China
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9
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Manna K, Begam HM, Samanta K, Jana R. Overcoming the Deallylation Problem: Palladium(II)-Catalyzed Chemo-, Regio-, and Stereoselective Allylic Oxidation of Aryl Allyl Ether, Amine, and Amino Acids. Org Lett 2020; 22:7443-7449. [PMID: 32955263 DOI: 10.1021/acs.orglett.0c02465] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
We report herein a Pd(II)/bis-sulfoxide-catalyzed intramolecular allylic C-H acetoxylation of aryl allyl ether, amine, and amino acids with the retention of a labile allyl moiety. Mechanistically, the reaction proceeds through a distinct double-bond isomerization from the allylic to the vinylic position followed by intramolecular carboxypalladation and the β-hydride elimination pathway. For the first time, C-H oxidation of N-allyl-protected amino acids to furnish five-membered heterocycles through 1,3-syn-addition is established with excellent diastereoselectivity.
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Affiliation(s)
- Kartic Manna
- Organic and Medicinal Chemistry Division, CSIR-Indian Institute of Chemical Biology, 4 Raja S. C. Mullick Road, Jadavpur, Kolkata 700032, West Bengal, India.,Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, Uttar Pradesh, India
| | - Hasina Mamataj Begam
- Organic and Medicinal Chemistry Division, CSIR-Indian Institute of Chemical Biology, 4 Raja S. C. Mullick Road, Jadavpur, Kolkata 700032, West Bengal, India
| | - Krishanu Samanta
- Organic and Medicinal Chemistry Division, CSIR-Indian Institute of Chemical Biology, 4 Raja S. C. Mullick Road, Jadavpur, Kolkata 700032, West Bengal, India.,Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, Uttar Pradesh, India
| | - Ranjan Jana
- Organic and Medicinal Chemistry Division, CSIR-Indian Institute of Chemical Biology, 4 Raja S. C. Mullick Road, Jadavpur, Kolkata 700032, West Bengal, India.,Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, Uttar Pradesh, India
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10
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Shelton PM, Grosslight SM, Mulligan BJ, Spargo HV, Saad SS, Vyvyan JR. Synthesis of guaipyridine alkaloids (±)-cananodine and (±)-rupestines D and G using an intramolecular Mizoroki-Heck reaction. Tetrahedron 2020. [DOI: 10.1016/j.tet.2020.131500] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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11
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Yin H, Huang YH, Deprey K, Condon ND, Kritzer JA, Craik DJ, Wang CK. Cellular Uptake and Cytosolic Delivery of a Cyclic Cystine Knot Scaffold. ACS Chem Biol 2020; 15:1650-1661. [PMID: 32315152 DOI: 10.1021/acschembio.0c00297] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Cyclotides are macrocyclic peptides with exceptionally stable structures and have been reported to penetrate cells, making them promising scaffolds for the delivery of inhibitory peptides to target intracellular proteins. However, their cellular uptake and cytosolic localization have been poorly understood until now, which has limited their therapeutic potential. In this study, the recently developed chloroalkane penetration assay was combined with established assays to characterize the cellular uptake and cytosolic delivery of the prototypic cyclotide, kalata B1. We show that kalata B1 enters the cytosol at low efficiency. A structure-activity study of residues in loop 6 showed that some modifications, such as increasing cationic residue content, did not affect delivery efficiency, whereas others, including introducing a single hydrophobic amino acid, did significantly improve cytosolic delivery. Our results provide a foundation for the further development of a structurally unique class of scaffolds for the delivery of therapeutic cargoes into cells.
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Affiliation(s)
- Huawu Yin
- Institute for Molecular Bioscience, The University of Queensland, Brisbane, Queensland 4072, Australia
| | - Yen-Hua Huang
- Institute for Molecular Bioscience, The University of Queensland, Brisbane, Queensland 4072, Australia
| | - Kirsten Deprey
- Department of Chemistry, Tufts University, Medford, Massachusetts 02155, United States
| | - Nicholas D. Condon
- Institute for Molecular Bioscience, The University of Queensland, Brisbane, Queensland 4072, Australia
| | - Joshua A. Kritzer
- Department of Chemistry, Tufts University, Medford, Massachusetts 02155, United States
| | - David J. Craik
- Institute for Molecular Bioscience, The University of Queensland, Brisbane, Queensland 4072, Australia
| | - Conan K. Wang
- Institute for Molecular Bioscience, The University of Queensland, Brisbane, Queensland 4072, Australia
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12
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Menges JA, Grandjean A, Clasen A, Jung G. Kinetics of Palladium(0)‐Allyl Interactions in the Tsuji‐Trost Reaction, derived from Single‐Molecule Fluorescence Microscopy. ChemCatChem 2020. [DOI: 10.1002/cctc.202000032] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Johannes A. Menges
- Department of Biophysical Chemistry Saarland University Building B2 2 66123 Saarbrücken Germany
| | - Alexander Grandjean
- Department of Biophysical Chemistry Saarland University Building B2 2 66123 Saarbrücken Germany
| | - Anne Clasen
- Department of Biophysical Chemistry Saarland University Building B2 2 66123 Saarbrücken Germany
| | - Gregor Jung
- Department of Biophysical Chemistry Saarland University Building B2 2 66123 Saarbrücken Germany
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13
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Spicer CD, Pujari-Palmer M, Autefage H, Insley G, Procter P, Engqvist H, Stevens MM. Synthesis of Phospho-Amino Acid Analogues as Tissue Adhesive Cement Additives. ACS CENTRAL SCIENCE 2020; 6:226-231. [PMID: 32123740 PMCID: PMC7047273 DOI: 10.1021/acscentsci.9b01149] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/07/2019] [Indexed: 05/15/2023]
Abstract
In this paper we report the synthesis of a library of phospho-amino acid analogues, via a novel single-step allyl-phosphoester protection/Pd-mediated deprotection strategy. These phosphoserine and phosphotyrosine analogues were then applied as additives to create adhesive calcium phosphate cements, allowing us to probe the chemical origins of the increased surface binding strength. We demonstrate the importance of multiple calcium binding motifs in mediating adhesion, as well as highlighting the crucial role played by substrate hydrophobicity and orientation in controlling binding strength.
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Affiliation(s)
- Christopher D. Spicer
- Department
of Medical Biochemistry and Biophysics, Karolinska Institutet, 171 77 Stockholm, Sweden
- Department
of Chemistry, University of York, Heslington YO10 5DD, United Kingdom
- York
Biomedical Research Institute, University
of York, Heslington YO10 5DD, United Kingdom
| | - Michael Pujari-Palmer
- Applied
Material Science, Department of Engineering, Uppsala University, 75121 Uppsala, Sweden
| | - Hélène Autefage
- Department
of Medical Biochemistry and Biophysics, Karolinska Institutet, 171 77 Stockholm, Sweden
| | - Gerard Insley
- Applied
Material Science, Department of Engineering, Uppsala University, 75121 Uppsala, Sweden
| | - Philip Procter
- Applied
Material Science, Department of Engineering, Uppsala University, 75121 Uppsala, Sweden
| | - Håkan Engqvist
- Applied
Material Science, Department of Engineering, Uppsala University, 75121 Uppsala, Sweden
| | - Molly M. Stevens
- Department
of Medical Biochemistry and Biophysics, Karolinska Institutet, 171 77 Stockholm, Sweden
- Department
of Materials, Department of Bioengineering, and Institute of Biomedical
Engineering, Imperial College London, London SW7 2AZ, United Kingdom
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14
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Nickel-Catalyzed Removal of Alkene Protecting Group of Phenols, Alcohols via Chain Walking Process. Molecules 2020; 25:molecules25030602. [PMID: 32019185 PMCID: PMC7037277 DOI: 10.3390/molecules25030602] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2019] [Revised: 01/25/2020] [Accepted: 01/28/2020] [Indexed: 11/23/2022] Open
Abstract
An efficient nickel-catalyzed removal of alkene protection group under mild condition with high functional group tolerance through chain walking process has been established. Not only phenolic ethers, but also alcoholic ethers can be tolerated with the retention of stereocenter adjacent to hydroxyl group. The new reaction brings the homoallyl group into a start of new type of protecting group.
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15
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Li J, Tan H, An Y, Shao Z, Zhao S. Synthesis and DABCO‐induced demethylation of 3‐cyano‐4‐methoxy‐2‐pyridone derivatives. J Heterocycl Chem 2020. [DOI: 10.1002/jhet.3783] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Affiliation(s)
- Jing Li
- College of Chemistry, Chemical Engineering and Biotechnology, Donghua University No.2999 North Renmin Road Shanghai 201620 People's Republic of China
| | - Hong‐Ru Tan
- College of Chemistry, Chemical Engineering and Biotechnology, Donghua University No.2999 North Renmin Road Shanghai 201620 People's Republic of China
| | - Yu‐Long An
- College of Chemistry, Chemical Engineering and Biotechnology, Donghua University No.2999 North Renmin Road Shanghai 201620 People's Republic of China
| | - Zhi‐Yu Shao
- College of Chemistry, Chemical Engineering and Biotechnology, Donghua University No.2999 North Renmin Road Shanghai 201620 People's Republic of China
| | - Sheng‐Yin Zhao
- College of Chemistry, Chemical Engineering and Biotechnology, Donghua University No.2999 North Renmin Road Shanghai 201620 People's Republic of China
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16
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Koizumi T, Hayashi S. Synthesis of Polymers Having Exomethylene Groups via Palladium(0)-Catalyzed Cross-Coupling Polymerization of Propargylic Carbonates with Various Nucleophiles. J SYN ORG CHEM JPN 2019. [DOI: 10.5059/yukigoseikyokaishi.77.351] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Toshio Koizumi
- Department of Applied Chemistry, National Defense Academy
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17
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Menges JA, Clasen A, Jourdain M, Beckmann J, Hoffmann C, König J, Jung G. Surface Preparation for Single-Molecule Chemistry. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2019; 35:2506-2516. [PMID: 30664351 DOI: 10.1021/acs.langmuir.8b03603] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Immobilization procedures, intended to enable prolonged observation of single molecules by fluorescence microscopy, may generate heterogeneous microenvironments, thus inducing heterogeneity in the molecular behavior. On that account, we propose a straightforward surface preparation procedure for studying chemical reactions on the single-molecule level. Sensor fluorophores were developed, which exhibit dual-emissive characteristics in a homogeneously catalyzed showcase reaction. These molecules undergo a shift of fluorescence wavelength of about 100 nm upon Pd(0)-induced deallylation in the Tsuji-Trost reaction, allowing for separate visualization of the starting material and product. Whereas a simultaneous immobilization of dye and inert silane leads to strongly polydisperse reaction kinetics, a consecutive immobilization routine with deposition of dye molecules as the last step provides substrates underlying the kinetics of ensemble experiments. Also, the found kinetics are unaffected by the chemical variation of inert silanes, nearly uniform, and therefore well reproducible. Additional parameters like photostability, signal-to-noise ratio, dye-molecule density, and spatial distribution of dye molecules are, as well, hardly affected by surface modification in the successive immobilization scheme.
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Affiliation(s)
- Johannes A Menges
- Biophysical Chemistry , Saarland University , Building B2.2 , 66123 Saarbrücken , Germany
| | - Anne Clasen
- Biophysical Chemistry , Saarland University , Building B2.2 , 66123 Saarbrücken , Germany
| | - Matthias Jourdain
- Biophysical Chemistry , Saarland University , Building B2.2 , 66123 Saarbrücken , Germany
| | - Julian Beckmann
- Biophysical Chemistry , Saarland University , Building B2.2 , 66123 Saarbrücken , Germany
| | - Caroline Hoffmann
- Biophysical Chemistry , Saarland University , Building B2.2 , 66123 Saarbrücken , Germany
| | - Julien König
- Biophysical Chemistry , Saarland University , Building B2.2 , 66123 Saarbrücken , Germany
| | - Gregor Jung
- Biophysical Chemistry , Saarland University , Building B2.2 , 66123 Saarbrücken , Germany
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18
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Doumas M, Rouillon S, Venisse N, Nadeau C, Pierre Eugene P, Farce A, Chavatte P, Dupuis A, Migeot V, Carato P. Chlorinated and brominated bisphenol A derivatives: Synthesis, characterization and determination in water samples. CHEMOSPHERE 2018; 213:434-442. [PMID: 30243209 DOI: 10.1016/j.chemosphere.2018.09.061] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/05/2018] [Revised: 09/10/2018] [Accepted: 09/11/2018] [Indexed: 06/08/2023]
Abstract
Bisphenol A (BPA) has been used in the plastics industry for several decades. During the treatment of drinking water with chlorine reagent, the formation of chlorinated derivatives of BPA (ClxBPA) but also bromoBPA and bromochloroBPA is to be expected. Some of these compounds are considered to have an estrogenic effect and could induce major risks for human health by targeting different organs and systems in the body. In this paper, we describe the synthesis of chloro- and bromobisphenol A (ClxBPA, BrxBPA, BrxClxBPA)and their analytical characterization. These derivatives could be used as analytical standards in LC-MS/MS or evaluated in in vitro biological tests for their potential as endocrine disruptors. In this study, we evaluated the presence of BPA, ClxBPA in a pilot study from water samples. Range values found for BPA, ClxBPA were respectively 2.8-4169.3 ng/L and 0.8-11.3 ng/L.
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Affiliation(s)
- Manon Doumas
- Université de Poitiers, F-86000, Poitiers, France; IC2MP, CNRS, 7285, UFR Médecine Pharmacie, Poitiers, France; CIC INSERM, 1402, UFR Médecine Pharmacie, Poitiers, France.
| | - Steeve Rouillon
- Université de Poitiers, F-86000, Poitiers, France; CIC INSERM, 1402, UFR Médecine Pharmacie, Poitiers, France.
| | - Nicolas Venisse
- CIC INSERM, 1402, UFR Médecine Pharmacie, Poitiers, France; Service de Toxicologie et Pharmacocinétique, CHU, Poitiers, France.
| | - Cedric Nadeau
- Service de Gynécologie Obstétrique, CHU, Poitiers, France.
| | - Pascale Pierre Eugene
- Université de Poitiers, F-86000, Poitiers, France; CIC INSERM, 1402, UFR Médecine Pharmacie, Poitiers, France.
| | - Amaury Farce
- Univ. Lille, Inserm, CHU Lille, U995 - LIRIC - Lille Inflammation Research International Center, Lille, France.
| | - Philippe Chavatte
- Univ. Lille, Inserm, CHU Lille, U995 - LIRIC - Lille Inflammation Research International Center, Lille, France.
| | - Antoine Dupuis
- Université de Poitiers, F-86000, Poitiers, France; CIC INSERM, 1402, UFR Médecine Pharmacie, Poitiers, France; Service de Pharmacie, CHU, Poitiers, France.
| | - Virginie Migeot
- Université de Poitiers, F-86000, Poitiers, France; CIC INSERM, 1402, UFR Médecine Pharmacie, Poitiers, France; Pole Biospharm Service de Santé Publique, CHU, Poitiers, France.
| | - Pascal Carato
- Université de Poitiers, F-86000, Poitiers, France; CIC INSERM, 1402, UFR Médecine Pharmacie, Poitiers, France.
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19
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Verhasselt S, Roman BI, De Wever O, Van Hecke K, Van Deun R, Bracke ME, Stevens CV. Discovery of (S)-3'-hydroxyblebbistatin and (S)-3'-aminoblebbistatin: polar myosin II inhibitors with superior research tool properties. Org Biomol Chem 2018; 15:2104-2118. [PMID: 28220174 DOI: 10.1039/c7ob00006e] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In search of myosin II inhibitors with superior research tool properties, a chemical optimization campaign of the blebbistatin scaffold was conducted in this paper. (S)-Blebbistatin is the best known small-molecule inhibitor of myosin II ATPase activity. Unfortunately, as a research tool this compound has several deficiencies: it is photolabile and (photo)toxic, has low water solubility, and its (fluorescent) precipitates interfere in (fluorescence) readouts. In view of obtaining tool compounds with improved properties, both enantiomers of a series of D-ring modified polar analogs were prepared. We identified (S)-3'-hydroxyblebbistatin (S)-2 and (S)-3'-aminoblebbistatin (S)-3 as two myosin II inhibitors with a 30-fold higher water solubility than (S)-blebbistatin. These molecules furthermore do not cause interference in (fluorescence) readouts. (S)-2 and (S)-3 thus are superior alternatives to (S)-blebbistatin as research tools to study myosin II.
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Affiliation(s)
- Sigrid Verhasselt
- SynBioC Research Group, Department of Sustainable Organic Chemistry and Technology, Ghent University, Coupure Links 653, 9000 Ghent, Belgium.
| | - Bart I Roman
- SynBioC Research Group, Department of Sustainable Organic Chemistry and Technology, Ghent University, Coupure Links 653, 9000 Ghent, Belgium.
| | - Olivier De Wever
- Laboratory of Experimental Cancer Research, Department of Radiation Oncology and Experimental Cancer Research, Ghent University, De Pintelaan 185, 9000 Ghent, Belgium
| | - Kristof Van Hecke
- Department of Inorganic and Physical Chemistry, Ghent University, Krijgslaan 281 S3, 9000 Ghent, Belgium
| | - Rik Van Deun
- Department of Inorganic and Physical Chemistry, Ghent University, Krijgslaan 281 S3, 9000 Ghent, Belgium
| | - Marc E Bracke
- Laboratory of Experimental Cancer Research, Department of Radiation Oncology and Experimental Cancer Research, Ghent University, De Pintelaan 185, 9000 Ghent, Belgium
| | - Christian V Stevens
- SynBioC Research Group, Department of Sustainable Organic Chemistry and Technology, Ghent University, Coupure Links 653, 9000 Ghent, Belgium.
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20
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Liu X, Zhang H, Wu C, Liu Z, Chen Y, Yu B, Liu Z. Copper-catalyzed synthesis of benzanilides from lignin model substrates 2-phenoxyacetophenones under an air atmosphere. NEW J CHEM 2018. [DOI: 10.1039/c7nj02589k] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
A novel approach for the synthesis of benzanilides is presented via the Cu-catalyzed reaction of 2-phenoxyacetophenones with anilines under an air atmosphere, and a series of benzanilides can be obtained in high yields.
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Affiliation(s)
- Xinwei Liu
- Beijing National Laboratory for Molecular Sciences
- Key Laboratory of Colloid
- Interface and Thermodynamics
- Institute of Chemistry
- Chinese Academy of Sciences
| | - Hongye Zhang
- Beijing National Laboratory for Molecular Sciences
- Key Laboratory of Colloid
- Interface and Thermodynamics
- Institute of Chemistry
- Chinese Academy of Sciences
| | - Cailing Wu
- Beijing National Laboratory for Molecular Sciences
- Key Laboratory of Colloid
- Interface and Thermodynamics
- Institute of Chemistry
- Chinese Academy of Sciences
| | - Zhenghui Liu
- Beijing National Laboratory for Molecular Sciences
- Key Laboratory of Colloid
- Interface and Thermodynamics
- Institute of Chemistry
- Chinese Academy of Sciences
| | - Yu Chen
- Beijing National Laboratory for Molecular Sciences
- Key Laboratory of Colloid
- Interface and Thermodynamics
- Institute of Chemistry
- Chinese Academy of Sciences
| | - Bo Yu
- Beijing National Laboratory for Molecular Sciences
- Key Laboratory of Colloid
- Interface and Thermodynamics
- Institute of Chemistry
- Chinese Academy of Sciences
| | - Zhimin Liu
- Beijing National Laboratory for Molecular Sciences
- Key Laboratory of Colloid
- Interface and Thermodynamics
- Institute of Chemistry
- Chinese Academy of Sciences
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21
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Verhasselt S, Roman BI, Bracke ME, Stevens CV. Improved synthesis and comparative analysis of the tool properties of new and existing D-ring modified (S)-blebbistatin analogs. Eur J Med Chem 2017; 136:85-103. [PMID: 28486210 DOI: 10.1016/j.ejmech.2017.04.072] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2017] [Revised: 04/24/2017] [Accepted: 04/26/2017] [Indexed: 12/22/2022]
Abstract
(S)-Blebbistatin is a widely used research tool to study myosin II, an important regulator of many motility based diseases. Its potency is too low to be of clinical relevance, but identification of analogs with enhanced potency could deliver leads for targeted pharmacotherapeutics. This, however, requires a profound insight into the structure-activity relationship of the (S)-blebbistatin scaffold. Therefore, new D-ring modified (S)-blebbistatin derivatives were prepared to extend the existing small library of analogs. These molecules were obtained via an improved synthesis pathway and their myosin II inhibitory properties were evaluated in vitro. Finally, all new and known D-ring modified (S)-blebbistatin analogs were compared and the most potent ones underwent a screening of their physicochemical properties.
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Affiliation(s)
- Sigrid Verhasselt
- SynBioC Research Group, Department of Sustainable Organic Chemistry and Technology, Campus Coupure, Ghent University, Coupure Links 653, 9000 Ghent, Belgium
| | - Bart I Roman
- SynBioC Research Group, Department of Sustainable Organic Chemistry and Technology, Campus Coupure, Ghent University, Coupure Links 653, 9000 Ghent, Belgium.
| | - Marc E Bracke
- Laboratory of Experimental Cancer Research, Department of Radiation Oncology and Experimental Cancer Research, Ghent University, De Pintelaan 185, 9000 Ghent, Belgium
| | - Christian V Stevens
- SynBioC Research Group, Department of Sustainable Organic Chemistry and Technology, Campus Coupure, Ghent University, Coupure Links 653, 9000 Ghent, Belgium.
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22
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Abstract
Methods for the direct C-H functionalization of aromatic compounds are in demand for a variety of applications, including the synthesis of agrochemicals, pharmaceuticals, and materials. Herein, we disclose the construction of aromatic nitriles via direct C-H functionalization using an acridinium photoredox catalyst and trimethylsilyl cyanide under an aerobic atmosphere. The reaction proceeds at room temperature under mild conditions and has proven to be compatible with a variety of electron-donating and -withdrawing groups, halogens, and nitrogen- and oxygen-containing heterocycles, as well as aromatic-containing pharmaceutical agents.
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Affiliation(s)
- Joshua B. McManus
- Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599-3290, United States
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23
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Sakate SS, Kamble SB, Chikate RC, Rode CV. MCM-41-supported phosphotungstic acid-catalyzed cleavage of C–O bond in allyl aryl ethers. NEW J CHEM 2017. [DOI: 10.1039/c7nj00375g] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A solid acid (PWA/MCM-41) efficiently catalyzed the deprotection of allyl group from the allyl aryl ethers of various types of substrates, in the presence of other oxygen protecting groups.
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Affiliation(s)
- Sachin S. Sakate
- CSIR-National Chemical Laboratory
- Pune 411008
- India
- P. E. Society's Modern College of Arts
- Science and Commerce
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24
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Hemming DS, Talbot EP, Steel PG. A mild copper catalyzed method for the selective deprotection of aryl allyl ethers. Tetrahedron Lett 2017. [DOI: 10.1016/j.tetlet.2016.11.084] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
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25
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Abstract
The second total synthesis of macrocidin A afforded the bioherbicidal fungal metabolite in 16 steps starting from doubly protected l-tyrosine. The 3-octanoyl side chain with the α-methyl group and an ω-bromo epoxide already in place was attached to the tetramic acid via a Yoshii-Yoda acylation, and the macrocycle was eventually closed in 55% yield by a Williamson etherification between the phenolate and the epoxy bromide.
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Affiliation(s)
- Robert G Haase
- Organic Chemistry Laboratory, University of Bayreuth , Universitätsstrasse 30, 95440 Bayreuth, Germany
| | - Rainer Schobert
- Organic Chemistry Laboratory, University of Bayreuth , Universitätsstrasse 30, 95440 Bayreuth, Germany
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26
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Essig S, Menche D. Stereoselective Synthesis of Isochromanones by an Asymmetric Ortho-Lithiation Strategy: Synthetic Access to the Isochromanone Core of the Ajudazols. J Org Chem 2016; 81:1943-66. [DOI: 10.1021/acs.joc.5b02781] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Affiliation(s)
- Sebastian Essig
- Institut
für Organische Chemie, Ruprecht-Karls Universität Heidelberg, Im Neuenheimer Feld 270, 69120 Heidelberg, Germany
| | - Dirk Menche
- Kekulé-Institut
für Organische Chemie und Biochemie, Universität Bonn, Gerhard-Domagk-Straße 1, 53121 Bonn, Germany
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27
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Abbas Y, Mansha M, Ullah N. The first total synthesis of potent antitumoral (±)-mafaicheenamine A, unnatural 6-fluoromafaicheenamine A and expedient synthesis of clausine E. RSC Adv 2016. [DOI: 10.1039/c6ra03242g] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The first total synthesis of potent antitumoral mafaicheenamine A (1) and its unnatural analogue, 6-fluoromafaicheenamine A (2) have been accomplished.
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Affiliation(s)
- Yasir Abbas
- Chemistry Department
- King Fahd University of Petroleum and Minerals
- Dhahran
- Saudi Arabia
| | - Muhammad Mansha
- Chemistry Department
- King Fahd University of Petroleum and Minerals
- Dhahran
- Saudi Arabia
- Centre of Research Excellence in Nanotechnology
| | - Nisar Ullah
- Chemistry Department
- King Fahd University of Petroleum and Minerals
- Dhahran
- Saudi Arabia
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28
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Tanaka S, Suzuki Y, Saburi H, Kitamura M. Soft ruthenium and hard Brønsted acid combined catalyst for efficient cleavage of allyloxy bonds. Application to protecting group chemistry. Tetrahedron 2015. [DOI: 10.1016/j.tet.2015.04.088] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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29
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Discovery, synthesis and biochemical profiling of purine-2,6-dione derivatives as inhibitors of the human poly(A)-selective ribonuclease Caf1. Bioorg Med Chem Lett 2015; 25:4219-24. [PMID: 26299350 PMCID: PMC4577731 DOI: 10.1016/j.bmcl.2015.07.095] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2015] [Revised: 07/28/2015] [Accepted: 07/31/2015] [Indexed: 12/23/2022]
Abstract
Eukaryotic mRNA contains a 3′ poly(A) tail, which plays important roles in the regulation of mRNA stability and translation. Well-characterized enzymes involved in the shortening of the poly(A) tail include the multi-subunit Ccr4-Not deadenylase, which contains the Caf1 (Pop2) and Ccr4 catalytic components, and poly(A)-specific ribonuclease (PARN). Two Mg2+ ions present in the active sites of these ribonucleases are required for RNA cleavage. Here, we report the discovery, synthesis and biochemical profiling of purine-2,6-dione derivatives as (sub)micromolar inhibitors of Caf1.
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30
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Application of a new phosphorus-free palladium heterogeneous nanocatalyst supported on modified MWCNT the highly selective and efficient cleavage of propargyl, allyl, and benzyl phenol ethers under mild conditions. Mol Divers 2015; 19:481-500. [PMID: 25894362 DOI: 10.1007/s11030-015-9585-3] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2014] [Accepted: 03/21/2015] [Indexed: 09/29/2022]
Abstract
A stable and efficient phosphorus-free, low Pd-loading heterogeneous nanocatalyst comprising palladium and a multi-walled carbon nanotube was prepared and characterized by various techniques such as SEM, TEM, AFM, FT-IR, and Raman spectrometry, N2 adsorption isotherm and thermogravimetric analysis. This catalyst was used for the deprotection of phenol ethers. The catalyst selectivity for deprotection of between propargyl, allyl, and benzyl, as a protecting group, was studied. Also, the presence of different functional groups was studied to establish the scope and limitations of this method. The catalytic activity of recycled catalyst was evaluated. The results indicated that the catalyst is heterogeneous, stable, and very active under the established conditions, and it could be reused up to five times without any significant leaching. In addition, according to ICP analysis, low leaves of leaching of palladium from the catalyst was observed, which indicates that anthraquinone has an excellent ability to coordinate with palladium.
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31
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Zhou Z, Tius MA. Synthesis of Each Enantiomer of Rocaglamide by Means of a Palladium(0)-Catalyzed Nazarov-Type Cyclization. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201501374] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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32
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Zhou Z, Tius MA. Synthesis of each enantiomer of rocaglamide by means of a palladium(0)-catalyzed Nazarov-type cyclization. Angew Chem Int Ed Engl 2015; 54:6037-40. [PMID: 25824525 DOI: 10.1002/anie.201501374] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2015] [Revised: 03/05/2015] [Indexed: 12/29/2022]
Abstract
A recently reported Pd(0)-catalyzed asymmetric Nazarov-type cyclization has been successfully applied in the key step of the first catalytic asymmetric total synthesis of (-)-rocaglamide (natural) and (+)-rocaglamide. The stereochemistry at the C3 position that controls the stereochemistry of all other stereocenters is determined in the cyclization step. This versatile and modular synthesis proceeds from simple reagents.
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Affiliation(s)
- Zhe Zhou
- Chemistry Department, University of Hawaii at Manoa, 2545 The Mall, Honolulu, HI 96822 (USA)
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33
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Kitamura M, Tanaka S, Yoshimura M. Donor-Acceptor Bifunctional Molecular Catalyst: Its Development, Application, and Analysis. J SYN ORG CHEM JPN 2015. [DOI: 10.5059/yukigoseikyokaishi.73.690] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Masato Kitamura
- Graduate School of Pharmaceutical Sciences, Nagoya University
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34
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Synthesis of Benzophenone Glucopyranosides fromPhaleria macrocarpaand Related Benzophenone Glucopyranosides. Biosci Biotechnol Biochem 2014; 73:2172-82. [DOI: 10.1271/bbb.90242] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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35
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Preidl JJ, Gnanapragassam VS, Lisurek M, Saupe J, Horstkorte R, Rademann J. Fluoreszente Mimetika von CMP-Neu5Ac sind hochaffine, zellgängige Polarisationssonden eukaryotischer und bakterieller Sialyltransferasen und inhibieren die zelluläre Sialylierung. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201400394] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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36
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Preidl JJ, Gnanapragassam VS, Lisurek M, Saupe J, Horstkorte R, Rademann J. Fluorescent mimetics of CMP-Neu5Ac are highly potent, cell-permeable polarization probes of eukaryotic and bacterial sialyltransferases and inhibit cellular sialylation. Angew Chem Int Ed Engl 2014; 53:5700-5. [PMID: 24737687 DOI: 10.1002/anie.201400394] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2014] [Indexed: 12/23/2022]
Abstract
Oligosaccharides of the glycolipids and glycoproteins at the outer membranes of human cells carry terminal neuraminic acids, which are responsible for recognition events and adhesion of cells, bacteria, and virus particles. The synthesis of neuraminic acid containing glycosides is accomplished by intracellular sialyl transferases. Therefore, the chemical manipulation of cellular sialylation could be very important to interfere with cancer development, inflammations, and infections. The development and applications of the first nanomolar fluorescent inhibitors of sialyl transferases are described herein. The obtained carbohydrate-nucleotide mimetics were found to bind all four commercially available and tested eukaryotic and bacterial sialyl transferases in a fluorescence polarization assay. Moreover, it was observed that the anionic mimetics intruded rapidly and efficiently into cells in vesicles and translocated to cellular organelles surrounding the nucleus of CHO cells. The new compounds inhibit cellular sialylation in two cell lines and open new perspectives for investigations of cellular sialylation.
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Affiliation(s)
- Johannes J Preidl
- Medicinal Chemistry, Freie Universität Berlin, Königin-Luise-Strasse 2+4, 14195 Berlin (Germany) http://www.bcp.fu-berlin.de/ag-rademann; Department of Medicinal Chemistry, Leibniz Institut für Molekulare Pharmakologie (FMP), Robert-Rössle-Strasse 10, 13125 Berlin (Germany)
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37
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Fer MJ, Olatunji S, Bouhss A, Calvet-Vitale S, Gravier-Pelletier C. Toward Analogues of MraY Natural Inhibitors: Synthesis of 5′-Triazole-Substituted-Aminoribosyl Uridines Through a Cu-Catalyzed Azide–Alkyne Cycloaddition. J Org Chem 2013; 78:10088-105. [DOI: 10.1021/jo4014035] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Mickaël J. Fer
- Laboratoire de
Chimie et Biochimie Pharmacologiques et Toxicologiques, Université Paris Descartes, UMR 8601 CNRS, 45 rue des Saints Pères, 75006 Paris, France
| | - Samir Olatunji
- Laboratoire
des
Enveloppes Bactériennes et Antibiotiques, Institut de Biochimie
et Biophysique Moléculaire et Cellulaire, Université Paris-Sud 11, UMR 8619 CNRS, Orsay F-91405, France
| | - Ahmed Bouhss
- Laboratoire
des
Enveloppes Bactériennes et Antibiotiques, Institut de Biochimie
et Biophysique Moléculaire et Cellulaire, Université Paris-Sud 11, UMR 8619 CNRS, Orsay F-91405, France
| | - Sandrine Calvet-Vitale
- Laboratoire de
Chimie et Biochimie Pharmacologiques et Toxicologiques, Université Paris Descartes, UMR 8601 CNRS, 45 rue des Saints Pères, 75006 Paris, France
| | - Christine Gravier-Pelletier
- Laboratoire de
Chimie et Biochimie Pharmacologiques et Toxicologiques, Université Paris Descartes, UMR 8601 CNRS, 45 rue des Saints Pères, 75006 Paris, France
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38
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Wu HP, Lu TN, Hsu NY, Chang CC. Absolute Stereochemical Assignment of SCH 71450, a Selective Dopamine D4Receptor Antagonist, Through Enantioselective Epimer Synthesis. European J Org Chem 2013. [DOI: 10.1002/ejoc.201300072] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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39
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Gärtner D, Konnerth H, von Wangelin AJ. Highly practical iron-catalyzed C–O cleavage reactions. Catal Sci Technol 2013. [DOI: 10.1039/c3cy00266g] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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40
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Shen LQ, Huang SY, Tang Y, Lei FH. The first synthesis of Krempene B. Steroids 2012; 77:1398-402. [PMID: 22989758 DOI: 10.1016/j.steroids.2012.08.006] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/22/2012] [Revised: 08/19/2012] [Accepted: 08/24/2012] [Indexed: 11/18/2022]
Abstract
The synthesis of Krempene B, which can be isolated from the marine soft coral Cladiella krempfi, is achieved in 23.9% overall yield from commercially available 3β-acetoxy-5-pregnen-20-one by 11 steps. Key transformations include the dienone-phenol rearrangement of steroids and Wittig reaction.
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Affiliation(s)
- Li-Qun Shen
- College of Chemistry and Chemical Engineering, Guangxi University for Nationalities, Key Laboratory of Development and Application of Forest Chemicals of Guangxi, Nanning 530006, China.
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41
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Mart A, Shashidhar MS. Elaboration of the ether cleaving ability and selectivity of the classical Pearlman's catalyst [Pd(OH)2/C]: concise synthesis of a precursor for a myo-inositol pyrophosphate. Tetrahedron 2012. [DOI: 10.1016/j.tet.2012.09.016] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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42
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Selective O-deallylation of dihydropyrazoles by molecular iodine in the presence of active N-allyl and formyl groups. RESEARCH ON CHEMICAL INTERMEDIATES 2012. [DOI: 10.1007/s11164-012-0581-2] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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43
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Heropoulos GA, Villalonga-Barber C. A clean, palladium-catalyzed oxidative esterification of aldehydes using benzyl chloride. Tetrahedron Lett 2011. [DOI: 10.1016/j.tetlet.2011.08.021] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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44
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Eckes F, Deiters E, Métivet A, Bulach V, Hosseini MW. Synthesis and Structural Analysis of Porphyrin-Based Polynucleating Ligands Bearing 8-Methoxy- and 8-(Allyloxy)quinoline Units. European J Org Chem 2011. [DOI: 10.1002/ejoc.201100006] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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45
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Barnickel B, Schobert R. Toward the macrocidins: macrocyclization via Williamson etherification of a phenolate. J Org Chem 2011; 75:6716-9. [PMID: 20828139 DOI: 10.1021/jo101416x] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The synthesis of macrocyclic 3-acyltetramic acids which are immediate precursors of the fungal herbicide macrocidin A (1) is reported. The crucial closure of the macrocycle was achieved in excellent yield by an unprecedented Williamson etherification of an ω-bromo phenolate generated in situ by a Pd-mediated O-deallylation.
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Affiliation(s)
- Bertram Barnickel
- Organisch-chemisches Laboratorium der Universität Bayreuth, Gebäude NW I, D-95440 Bayreuth, Germany
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46
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Barnickel B, Bayliffe F, Diestel R, Kempf K, Laschat S, Pachali S, Sasse F, Schlenk A, Schobert R. Structure-Activity Relationships of Precursors and Analogs of Natural 3-Enoyl-tetramic Acids. Chem Biodivers 2010; 7:2830-45. [DOI: 10.1002/cbdv.201000179] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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47
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Massicot F, Nonnenmacher J, Grellepois F, Portella C. Enantiopure 2-(Trifluoromethyl)-1,2,3,4-tetrahydronaphthalene-1,2-diols from a Tartaric Acid Derived Scaffold. European J Org Chem 2010. [DOI: 10.1002/ejoc.200901153] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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48
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Nonnenmacher J, Massicot F, Grellepois F, Portella C. Enantiopure quaternary alpha-trifluoromethyl-alpha-alkoxyaldehydes from L-tartaric acid derived ketoamides. J Org Chem 2008; 73:7990-5. [PMID: 18816141 DOI: 10.1021/jo8013403] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The diastereoselective nucleophilic trifluoromethylation of a range of ketoamides derived from L-tartaric acid has been studied. TMSCF3 in the presence of a catalytic amount of K2CO3 in DMF has been identified as the conditions leading to the highest diastereoselectivities. A sequential one-pot reaction trifluoromethylation-etherification of the trifluoromethylcarbinol has been developed. Only one further one-pot reaction, ketal hydrolysis-oxidative cleavage, led to the final alpha-trifluoromethylated alpha-alkoxyaldehydes. This procedure was applied to the preparation of a series of enantiopure aryl, heteroaryl, and alkyl alpha-trifluoromethyl-alpha-alkoxyaldehydes.
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Affiliation(s)
- Jean Nonnenmacher
- Université de Reims Champagne-Ardenne, Institut de Chimie Moléculaire de Reims, CNRS UMR 6229, UFR des Sciences Exactes et Naturelles, BP 1039, 51687 Reims Cedex 2, France
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Aponte JC, Verástegui M, Málaga E, Zimic M, Quiliano M, Vaisberg AJ, Gilman RH, Hammond GB. Synthesis, cytotoxicity, and anti-Trypanosoma cruzi activity of new chalcones. J Med Chem 2008; 51:6230-4. [PMID: 18798609 DOI: 10.1021/jm800812k] [Citation(s) in RCA: 99] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Synthesis of a cytotoxic dihydrochalcone, first isolated from a traditional Amazonian medicinal plant Iryanthera juruensis Warb (Myristicaceae), followed by a comprehensive SAR analysis of saturated and unsaturated chalcone synthetic intermediates, led to the identification of analogues with selective and significant in vitro anti- Trypanosoma cruzi activity. Further SAR studies were undertaken with the synthesis of 21 new chalcones containing two allyloxy moieties that resulted in the discovery of 2',4'-diallyloxy-6'-methoxy chalcones with improved selectivity against this parasite at concentrations below 25 microM, four of which exhibited a selectivity index greater than 12.
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Affiliation(s)
- José C Aponte
- Department of Chemistry, University of Louisville, Louisville, Kentucky 40292, USA
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50
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Shing TKM, Cheng HM, Wong WF, Kwong CSK, Li J, Lau CBS, Leung PS, Cheng CHK. Enantiospecific Synthesis of Pseudoacarviosin as a Potential Antidiabetic Agent. Org Lett 2008; 10:3145-8. [DOI: 10.1021/ol8010503] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Tony K. M. Shing
- Departments of Chemistry, Biochemistry, and Physiology, School of Pharmacy, and, Center of Novel Functional Molecules, The Chinese University of Hong Kong, Shatin, Hong Kong, China
| | - Hau M. Cheng
- Departments of Chemistry, Biochemistry, and Physiology, School of Pharmacy, and, Center of Novel Functional Molecules, The Chinese University of Hong Kong, Shatin, Hong Kong, China
| | - Wai F. Wong
- Departments of Chemistry, Biochemistry, and Physiology, School of Pharmacy, and, Center of Novel Functional Molecules, The Chinese University of Hong Kong, Shatin, Hong Kong, China
| | - Connie S. K. Kwong
- Departments of Chemistry, Biochemistry, and Physiology, School of Pharmacy, and, Center of Novel Functional Molecules, The Chinese University of Hong Kong, Shatin, Hong Kong, China
| | - Jianmei Li
- Departments of Chemistry, Biochemistry, and Physiology, School of Pharmacy, and, Center of Novel Functional Molecules, The Chinese University of Hong Kong, Shatin, Hong Kong, China
| | - Clara B. S. Lau
- Departments of Chemistry, Biochemistry, and Physiology, School of Pharmacy, and, Center of Novel Functional Molecules, The Chinese University of Hong Kong, Shatin, Hong Kong, China
| | - Po Sing Leung
- Departments of Chemistry, Biochemistry, and Physiology, School of Pharmacy, and, Center of Novel Functional Molecules, The Chinese University of Hong Kong, Shatin, Hong Kong, China
| | - Christopher H. K. Cheng
- Departments of Chemistry, Biochemistry, and Physiology, School of Pharmacy, and, Center of Novel Functional Molecules, The Chinese University of Hong Kong, Shatin, Hong Kong, China
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