1
|
Chen CL, Huang TS, Chang PH, Hsu CS. Iodide-umpolung catalytic system for non-traditional amide coupling from nitroalkanes and amines. Org Biomol Chem 2024; 22:2780-2790. [PMID: 38498332 DOI: 10.1039/d4ob00184b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/20/2024]
Abstract
An N-iodosuccinimide (NIS) catalyst was developed for use in the non-traditional synthesis of amide derivatives from nitroalkanes and amines. In contrast to traditional oxidative catalysis, this catalytic system involves reversing the polarities of two catalytic components (umpolung) by means of a hypervalent iodine reagent. A variety of functional groups were tolerated in the reaction, suggesting that they have the potential for use in other types of oxidative catalytic reactions.
Collapse
Affiliation(s)
- Chun-Lin Chen
- Department of Chemistry, Fu Jen Catholic University, 510 Zhongzheng Road, Xinzhuang District, New Taipei City 24205, Taiwan.
| | - Tian-Sih Huang
- Department of Chemistry, Fu Jen Catholic University, 510 Zhongzheng Road, Xinzhuang District, New Taipei City 24205, Taiwan.
| | - Po-Hsiang Chang
- Department of Chemistry, Fu Jen Catholic University, 510 Zhongzheng Road, Xinzhuang District, New Taipei City 24205, Taiwan.
| | - Che-Sheng Hsu
- Department of Chemistry, Fu Jen Catholic University, 510 Zhongzheng Road, Xinzhuang District, New Taipei City 24205, Taiwan.
| |
Collapse
|
2
|
Tonis E, Frousiou E, Heliopoulos NS, Kagkoura A, Stangel C, Siamidis D, Galeou A, Prombona A, Stamatakis K, Boukos N, Tagmatarchis N, Vougioukalakis GC. VAR Fabric Modification: Inducing Antibacterial Properties, Altering Wettability/Water Repellence, and Understanding Reactivity at the Molecular Level. ACS OMEGA 2023; 8:44708-44716. [PMID: 38046315 PMCID: PMC10688117 DOI: 10.1021/acsomega.3c05552] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/30/2023] [Accepted: 09/19/2023] [Indexed: 12/05/2023]
Abstract
The present work focuses on the surface coating of VAR technical fibers, consisting of 64% viscose (cellulose), 24% Kevlar, 10% other types of polyamides, and 2% antistatic polymers. Kevlar is an aramid material exhibiting excellent mechanical properties, while cellulose is a natural linear polymer composed of repeating β-d-glucose units, having several applications in the materials industry. Herein, we synthesized novel, tailor-designed organic molecules possessing functional groups able to anchor on VAR fabrics and cellulose materials, thus altering their properties on demand. To this end, we utilized methyl-α-d-glucopyranose as a model compound, both to optimize the reaction conditions, before applying them to the material and to understand the chemical behavior of the material at the molecular level. The efficient coating of the VAR fabric with the tailor-made compounds was then implemented. Thorough characterization studies using Raman and IR spectroscopies as well as SEM imaging and thermogravimetric analysis were also carried out. The wettability and water repellency and antibacterial properties of the modified VAR fabrics were also investigated in detail. To the best of our knowledge, such an approach has not been previously explored, among other factors regarding the understanding of the anchoring mechanism at the molecular level. The proposed modification protocol holds the potential to improve the properties of various cellulose-based materials beyond VAR fabrics.
Collapse
Affiliation(s)
- Efstathios Tonis
- Laboratory of Organic Chemistry, Department of Chemistry, National and Kapodistrian University of Athens, Athens 15771, Greece
| | - Efrosyni Frousiou
- Laboratory of Organic Chemistry, Department of Chemistry, National and Kapodistrian University of Athens, Athens 15771, Greece
| | - Nikolaos S Heliopoulos
- 700 Military Factory, Supreme Military Support Command, 50 Anapafseos, Piraeus 18648, Greece
| | - Antonia Kagkoura
- Theoretical and Physical Chemistry Institute, National Hellenic Research Foundation, 48 Vassileos Constantinou Avenue, Athens 11635, Greece
| | - Christina Stangel
- Theoretical and Physical Chemistry Institute, National Hellenic Research Foundation, 48 Vassileos Constantinou Avenue, Athens 11635, Greece
| | | | - Angeliki Galeou
- Institute of Biosciences and Applications, National Centre for Scientific Research "Demokritos", Patriarchou Grigoriou E' & Neapoleos Str., Agia Paraskevi,Athens, Attica 15341, Greece
| | - Anastasia Prombona
- Institute of Biosciences and Applications, National Centre for Scientific Research "Demokritos", Patriarchou Grigoriou E' & Neapoleos Str., Agia Paraskevi,Athens, Attica 15341, Greece
| | - Kostas Stamatakis
- Institute of Biosciences and Applications, National Centre for Scientific Research "Demokritos", Patriarchou Grigoriou E' & Neapoleos Str., Agia Paraskevi,Athens, Attica 15341, Greece
| | - Nikos Boukos
- Institute of Nanoscience and Nanotechnology, National Centre for Scientific Research "Demokritos", Patriarchou Grigoriou E' & Neapoleos Str., Agia Paraskevi,Athens, Attica 15341, Greece
| | - Nikos Tagmatarchis
- Theoretical and Physical Chemistry Institute, National Hellenic Research Foundation, 48 Vassileos Constantinou Avenue, Athens 11635, Greece
| | - Georgios C Vougioukalakis
- Laboratory of Organic Chemistry, Department of Chemistry, National and Kapodistrian University of Athens, Athens 15771, Greece
| |
Collapse
|
3
|
Zhang Q, Ren W, Dushkin AV, Su W. Preparation, characterization, in vitro and in vivo studies of olmesartan medoxomil in a ternary solid dispersion with N-methyl-D-glucamine and hydroxypropyl-β-cyclodextrin. J Drug Deliv Sci Technol 2020. [DOI: 10.1016/j.jddst.2020.101546] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
|
4
|
Lv XJ, Chen YH, Liu YK. Two Competitive but Switchable Organocatalytic Cascade Reaction Pathways: The Diversified Synthesis of Chiral Acetal-Containing Bridged Cyclic Compounds. Org Lett 2018; 21:190-195. [PMID: 30576161 DOI: 10.1021/acs.orglett.8b03654] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
The organocatalytic enantioselective synthesis of methanobenzodioxepine derivatives bearing a 6,6,5-bridged ring system is presented. The m-CPBA-triggered in situ α-oxidation of β-oxoesters to provide the required but unstable α-hydroxy-β-dicarbonyl substrates is the key to this three-step sequence, providing the desired cyclic acetals with excellent stereoselectivities containing two bridgehead and one fully substituted stereocenters. It is noteworthy that the absence of m-CPBA furnished the acetal products bearing a 6,6,6-bridged ring system with similar good results from the same starting materials.
Collapse
Affiliation(s)
- Xue-Jiao Lv
- Key Laboratory of Marine Drugs, Chinese Ministry of Education, School of Medicine and Pharmacy , Ocean University of China , Qingdao 266003 , China
| | - Ying-Han Chen
- Key Laboratory of Marine Drugs, Chinese Ministry of Education, School of Medicine and Pharmacy , Ocean University of China , Qingdao 266003 , China
| | - Yan-Kai Liu
- Key Laboratory of Marine Drugs, Chinese Ministry of Education, School of Medicine and Pharmacy , Ocean University of China , Qingdao 266003 , China.,Laboratory for Marine Drugs and Bioproducts of Qingdao National Laboratory for Marine Science and Technology , Qingdao 266003 , China
| |
Collapse
|
5
|
Development of efficient one-pot three-component assembly of trityl olmesartan medoxomil. Bioorg Med Chem 2018; 26:4348-4359. [PMID: 30006144 DOI: 10.1016/j.bmc.2018.06.036] [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: 05/19/2018] [Revised: 06/22/2018] [Accepted: 06/26/2018] [Indexed: 01/26/2023]
Abstract
We have elaborated a one-pot three-component assembly of trityl olmesartan medoxomil starting from commercially available ethyl 4-(2-hydroxypropan-2-yl)-2-propyl-1H-imidazole-5-carboxylate, 5-(4'-(bromomethyl)-[1,1'-biphenyl]-2-yl)-1-trityl-1H-tetrazole and 4-(chloromethyl)-5-methyl-1,3-dioxol-2-one intermediates. The developed and optimized one-pot process provides 72-75% yield of trityl olmesartan medoxomil over three steps, which represents in average ca. 90% yield per synthetic step, on a 300 g scale. The process is conducted in simple fashion and provides highly pure trityl olmesartan medoxomil (up to 97.5% by HPLC), which can be easily converted to olmesartan medoxomil that fully complies with all ICH requirements. Furthermore, the described process significantly improves the primary process to trityl olmesartan medoxomil by drastic reduction of required unit operations and application of single reaction solvent through the reaction sequence. Moreover, the amount of used organic solvents was notably reduced. The developed process has provided solid bases for industrial production of trityl olmesartan medoxomil.
Collapse
|
6
|
Li W, Han Y, Chen J. α-Alkoxycarbonyl-α-hydroxy secondary amides from a carbamoylsilane and α-ketoesters. Tetrahedron 2017. [DOI: 10.1016/j.tet.2017.08.035] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
|
7
|
Liu XL, Yang KW, Zhang YJ, Ge Y, Xiang Y, Chang YN, Oelschlaeger P. Optimization of amino acid thioesters as inhibitors of metallo-β-lactamase L1. Bioorg Med Chem Lett 2016; 26:4698-4701. [PMID: 27595424 DOI: 10.1016/j.bmcl.2016.08.048] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2016] [Revised: 08/11/2016] [Accepted: 08/18/2016] [Indexed: 10/21/2022]
Abstract
The emergence of antibiotic resistance caused by metallo-β-lactamases (MβLs) is a global public health problem. Recently, we found amino acid thioesters to be a highly promising scaffold for inhibitors of the MβL L1. In order to optimize this series of inhibitors, nine new amino acid thioesters were developed by modifying the substituents on the N-terminus of the thioesters and the groups representing the amino acid side chain. Biological activity assays indicate that all of them are very potent inhibitors of L1 with an IC50 value range of 20-600nM, lower than those of most of the previously reported inhibitors of this scaffold. Analysis of structure-activity relationship reveals that big hydrophobic substituents on the N-terminus and a methionine amino acid side chain improves inhibitory activity of the thioesters. All these inhibitors are able to restore antibacterial activity of a β-lactam antibiotic against Escherichia coli BL21(DE3) cells producing L1 to that against E. coli cells lacking a β-lactamase. Docking studies reveal that a large N-terminal hydrophobic group results in a slightly different binding mode than smaller hydrophobic groups at the same position.
Collapse
Affiliation(s)
- Xiao-Long Liu
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of Ministry of Education, Chemical Biology Innovation Lab, College of Chemistry and Materials Science, Northwest University, Xi'an 710127, PR China
| | - Ke-Wu Yang
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of Ministry of Education, Chemical Biology Innovation Lab, College of Chemistry and Materials Science, Northwest University, Xi'an 710127, PR China
| | - Yue-Juan Zhang
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of Ministry of Education, Chemical Biology Innovation Lab, College of Chemistry and Materials Science, Northwest University, Xi'an 710127, PR China
| | - Ying Ge
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of Ministry of Education, Chemical Biology Innovation Lab, College of Chemistry and Materials Science, Northwest University, Xi'an 710127, PR China
| | - Yang Xiang
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of Ministry of Education, Chemical Biology Innovation Lab, College of Chemistry and Materials Science, Northwest University, Xi'an 710127, PR China
| | - Ya-Nan Chang
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of Ministry of Education, Chemical Biology Innovation Lab, College of Chemistry and Materials Science, Northwest University, Xi'an 710127, PR China
| | - Peter Oelschlaeger
- Department of Pharmaceutical Sciences, College of Pharmacy, Western University of Health Sciences, 309 East Second Street, Pomona, CA 91766, USA
| |
Collapse
|
8
|
Asahara H, Nishiwaki N. Metal-Free α-Hydroxylation of α-Unsubstituted β-Oxoesters and β-Oxoamides. J Org Chem 2014; 79:11735-9. [DOI: 10.1021/jo501985u] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Haruyasu Asahara
- School of Environmental Science
and Engineering, and Research Center for Material Science and Engineering, Kochi University of Technology, Kami, Kochi 782-8502, Japan
| | - Nagatoshi Nishiwaki
- School of Environmental Science
and Engineering, and Research Center for Material Science and Engineering, Kochi University of Technology, Kami, Kochi 782-8502, Japan
| |
Collapse
|
9
|
|
10
|
El-Gamal MI, Anbar HS, Chung HJ, Kim HI, Cho YJ, Lee BS, Lee SA, Moon JY, Lee DJ, Kwon D, Choi WJ, Jeon HR, Oh CH. Discovery of olmesartan hexetil: A new potential prodrug of olmesartan. Bioorg Med Chem Lett 2013; 23:1347-50. [DOI: 10.1016/j.bmcl.2012.12.090] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2012] [Revised: 12/10/2012] [Accepted: 12/25/2012] [Indexed: 10/27/2022]
|
11
|
Singh S, Pathak K, Bali V. Product development studies on surface-adsorbed nanoemulsion of olmesartan medoxomil as a capsular dosage form. AAPS PharmSciTech 2012; 13:1212-21. [PMID: 22965661 DOI: 10.1208/s12249-012-9847-7] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2012] [Accepted: 08/22/2012] [Indexed: 11/30/2022] Open
Abstract
The present study aimed at development of capsular dosage form of surface-adsorbed nanoemulsion (NE) of olmesartan medoxomil (OLM) so as to overcome the limitations associated with handling of liquid NEs without affecting their pharmaceutical efficacy. Selection of oil, surfactant, and cosurfactant for construction of pseudoternary phase diagrams was made on the basis of solubility of drug in these excipients. Rationally selected NE formulations were evaluated for percentage transmittance, viscosity, refractive index, globule size, zeta potential, and polydispersity index (PDI). Formulation (F3) comprising of Capmul MCM® (10% v/v), Tween 80® (11.25% v/v), polyethylene glycol 400 (3.75% v/v), and double-distilled water (75% v/v) displayed highest percentage cumulative drug release (%CDR; 96.69 ± 1.841), least globule size (17.51 ± 5.87 nm), low PDI (0.203 ± 0.032), high zeta potential (-58.93 ± 0.98 mV), and hence was selected as the optimized formulation. F3 was adsorbed over colloidal silicon dioxide (2 ml/400 mg) to produce free-flowing solid surface-adsorbed NE that presented a ready-to-fill capsule composition. Conversion of NE to surface-adsorbed NE and its reconstitution to NE did not affect the in vitro release profile of OLM as the similarity factor with respect to NE was found to be 66% and 73% respectively. The %CDR after 12 h for optimized NE, surface-adsorbed NE, and reconstituted NE was found to be 96.69 ± 0.54, 96.07 ± 1.76, and 94.78 ± 1.57, respectively (p > 0.05). The present study established capsulated surface-adsorbed NE as a viable delivery system with the potential to overcome the handling limitations of NE.
Collapse
|
12
|
Kantevari S, Addla D, Bagul PK, Sridhar B, Banerjee SK. Synthesis and evaluation of novel 2-butyl-4-chloro-1-methylimidazole embedded chalcones and pyrazoles as angiotensin converting enzyme (ACE) inhibitors. Bioorg Med Chem 2011; 19:4772-81. [DOI: 10.1016/j.bmc.2011.06.085] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2011] [Revised: 06/27/2011] [Accepted: 06/28/2011] [Indexed: 11/16/2022]
|
13
|
Chang JS, El-Gamal MI, Lee WS, Anbar HS, Chung HJ, Kim HI, Cho YJ, Lee BS, Lee SA, Moon JY, Lee DJ, Jeon HR, Lee J, Choi YW, Oh CH. Design, synthesis, bioconversion, and pharmacokinetics evaluation of new ester prodrugs of olmesartan. Eur J Med Chem 2011; 46:3564-9. [PMID: 21641692 DOI: 10.1016/j.ejmech.2011.05.019] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2011] [Revised: 05/04/2011] [Accepted: 05/08/2011] [Indexed: 11/29/2022]
Abstract
Synthesis of new ester prodrugs of olmesartan is described. Their in vitro stabilities in simulated gastric juice, rat plasma, and rat liver microsomes were tested. And the pharmacokinetic parameters for olmesartan after their oral administration were also estimated and compared with those in case of olmesartan medoxomil. Compounds 13 and 14 demonstrated high stability in simulated gastric juice and were rapidly metabolized to olmesartan in rat liver microsomes and rat plasma in vitro. In addition, C(max) and AUC(last) parameters were significantly increased in case of compounds 13 and 14 compared with olmesartan medoxomil. These results indicate that compounds 13 and 14 with cyclohexylcarboxyethyl and adamantylcarboxymethyl promoieties, respectively, are promising prodrugs of olmesartan with markedly increased oral bioavailability.
Collapse
Affiliation(s)
- Jeong-Soo Chang
- College of Pharmacy, Chung-Ang University, 221 Heuksuk-dong, Dongjak-gu, Seoul 156-756, Republic of Korea
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|