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Baddam SR, Avula MK, Akula R, Battula VR, Kalagara S, Buchikonda R, Ganta S, Venkatesan S, Allaka TR. Design, synthesis and in silico molecular docking evaluation of novel 1,2,3-triazole derivatives as potent antimicrobial agents. Heliyon 2024; 10:e27773. [PMID: 38590856 PMCID: PMC10999864 DOI: 10.1016/j.heliyon.2024.e27773] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2023] [Revised: 03/06/2024] [Accepted: 03/06/2024] [Indexed: 04/10/2024] Open
Abstract
Chalcone and triazole scaffolds have demonstrated a crucial role in the advancement of science and technology. Due to their significance, research has proceeded on the design and development of novel benzooxepine connected to 1,2,3-triazolyl chalcone structures. The new chalcone derivatives produced by benzooxepine triazole methyl ketone 2 and different aromatic carbonyl compounds 3 are discussed in this paper. All prepared compounds have well-established structures to a variety of spectral approaches, including mass analysis, 1H NMR, 13C NMR, and IR. Among the tested compounds, hybrids 4c, 4d, 4i, and 4k exhibited exceptional antibacterial susceptibilities with MIC range of 3.59-10.30 μM against the tested S. aureus strain. Compounds 4c, 4d displayed superior antifungal activity against F. oxysporum with MIC 3.25, 4.89 μM, when compared to fluconazole (MIC = 3.83 μM) respectively. On the other hand, analogues 4d, 4f, and 4k demonstrated equivalent antitubercular action against H37Rv strain with MIC range of 2.16-4.90 μM. The capacity of ligand 4f to form a stable compound on the active site of CYP51 from M. tuberculosis (1EA1) was confirmed by docking studies using amino acids Leu321(A), Pro77(A), Phe83(A), Lys74(A), Tyr76(A), Ala73(A), Arg96(A), Thr80(A), Met79(A), His259(A), and Gln72(A). Additionally, the chalcone‒1,2,3‒triazole hybrids ADME (absorption, distribution, metabolism, and excretion), characteristics of molecules, estimations of toxicity, and bioactivity parameters were assessed.
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Affiliation(s)
- Sudhakar Reddy Baddam
- University of Massachusetts Chan Medical School, RNA Therapeutic Institute, Worcester, MA, 01655, United States
| | - Mahesh Kumar Avula
- Technology Development Center, Custom Pharmaceutical Services, Dr. Reddy's Laboratories Pvt. Ltd., Hyderabad, Telangana, 500049, India
- Department of Organic Chemistry and FDW, Andhra University, Visakhapatnam, Andhra Pradesh, 530003, India
| | - Raghunadh Akula
- Technology Development Center, Custom Pharmaceutical Services, Dr. Reddy's Laboratories Pvt. Ltd., Hyderabad, Telangana, 500049, India
| | - Venkateswara Rao Battula
- Department of Chemistry, AU College of Engineering (A), Andhra University, Visakhapatnam, Andhra Pradesh, 530003, India
| | - Sudhakar Kalagara
- Department of Chemistry and Biochemistry, University of the Texas at El Paso, El Paso, TX, 79968, United States
| | - Ravinder Buchikonda
- Technology Development Center, Custom Pharmaceutical Services, Dr. Reddy's Laboratories Pvt. Ltd., Hyderabad, Telangana, 500049, India
| | - Srinivas Ganta
- ScieGen Pharmaceutical Inc., Hauppauge, NY, 11788, United States
| | - Srinivasadesikan Venkatesan
- Department of Chemistry, School of Applied Science and Humanities, VIGNAN's Foundation for Science, Technology and Research, Vadlamudi, Andhra Pradesh, 522213, India
| | - Tejeswara Rao Allaka
- Centre for Chemical Sciences and Technology, Institute of Science and Technology, Jawaharlal Nehru Technological University Hyderabad, Kukatpally, Hyderabad, Telangana, 500085, India
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2
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Sulis PM, Bittencourt Mendes AK, Fernandes TA, Frederico MJS, Rey DP, Aragón M, Ruparelia KC, Silva FRMB. Signal transduction of the insulin secretion induced by the chalcone analogue, (E)-3-(phenyl)-1-(3,4,5-trimethoxyphenyl)prop-2-en-1-one, and its role in glucose and lipid metabolism. Biochimie 2023; 212:85-94. [PMID: 37080419 DOI: 10.1016/j.biochi.2023.04.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2022] [Revised: 04/10/2023] [Accepted: 04/11/2023] [Indexed: 04/22/2023]
Abstract
A chalcone analogue, (E)-3-(phenyl)-1-(3,4,5-trimethoxyphenyl)prop-2-en-1-one (DMU 101), was synthesized using classic base catalysis and Claisen-Schmidt condensation, and then screened for its antidiabetic properties. The compound's effects on glucose and lipid metabolism were assayed in rats that were treated acutely and for a short time to elucidate its mechanism of action, evaluating glucose tolerance and lactate dehydrogenase activity in response to chalcone analogue administration. The chalcone's in vitro and ex vivo effects on glycogen, glucose, lipid and lipolysis were also investigated, as well as the mechanism by which it induces 45Ca2+ influx-mediated insulin secretion. The analogue (10 mg/kg) diminished glycemia, without inducing acute cell damage, increased glycogen content in the skeletal muscle and reduced serum triacylglycerol and total cholesterol, but did not alter high-density lipoprotein or low-density lipoprotein. Chalcone (10 μM) stimulated glucose uptake in the soleus muscle and did not modulate in vitro or ex vivo lipolysis. This analogue also increased insulin secretion by triggering calcium influx and blocking ATP-sensitive K+ channels and voltage-dependent calcium channels. However, it also modulated stored calcium via sarco/endoplasmic reticulum calcium ATPase (SERCA) and ryanodine receptor (RYR) activity. These findings indicate that this chalcone may induce cellular repolarization via a mechanism mediated by calcium-dependent potassium channels.
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Affiliation(s)
- Paola Miranda Sulis
- Federal University of Santa Catarina, University Campus, Trindade, 88040- 900, Florianópolis, SC, Brazil
| | | | - Thaís Alves Fernandes
- Federal University of Santa Catarina, University Campus, Trindade, 88040- 900, Florianópolis, SC, Brazil
| | - Marisa Jadna Silva Frederico
- Federal University of Ceará, Faculty of Medicine, Department of Pharmacology and Physiology, Drug Research and Development Center (NPDM), Laboratory of Biochemical Pharmacology, Rua Coronel Nunes de Melo, 1000 - Rodolfo Teófilo, 60430-275, Fortaleza, CE, Brazil
| | - Diana Patricia Rey
- Federal University of Santa Catarina, University Campus, Trindade, 88040- 900, Florianópolis, SC, Brazil; National University of Colombia, Department of Pharmacy, Faculty of Sciences, Cra. 30 No. 45-03, 111321, Bogotá, D. C, Colombia
| | - Marcela Aragón
- National University of Colombia, Department of Pharmacy, Faculty of Sciences, Cra. 30 No. 45-03, 111321, Bogotá, D. C, Colombia
| | - Ketan C Ruparelia
- De Montfort University, Faculty of Health & Life Sciences, Leicester School of Pharmacy, Leicester, LE1 9BH, United Kingdom
| | - Fátima Regina Mena Barreto Silva
- Federal University of Santa Catarina, University Campus, Trindade, 88040- 900, Florianópolis, SC, Brazil; Cellular Bioelectricity Center (NUBIOCEL), Center of Biological Sciences, University Campus, Trindade, 88040- 900, Florianópolis, SC, Brazil.
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3
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Richter-Laskowska M, Trybek P, Delfino DV, Wawrzkiewicz-Jałowiecka A. Flavonoids as Modulators of Potassium Channels. Int J Mol Sci 2023; 24:1311. [PMID: 36674825 PMCID: PMC9861088 DOI: 10.3390/ijms24021311] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2022] [Revised: 01/02/2023] [Accepted: 01/04/2023] [Indexed: 01/12/2023] Open
Abstract
Potassium channels are widely distributed integral proteins responsible for the effective and selective transport of K+ ions through the biological membranes. According to the existing structural and mechanistic differences, they are divided into several groups. All of them are considered important molecular drug targets due to their physiological roles, including the regulation of membrane potential or cell signaling. One of the recent trends in molecular pharmacology is the evaluation of the therapeutic potential of natural compounds and their derivatives, which can exhibit high specificity and effectiveness. Among the pharmaceuticals of plant origin, which are potassium channel modulators, flavonoids appear as a powerful group of biologically active substances. It is caused by their well-documented anti-oxidative, anti-inflammatory, anti-mutagenic, anti-carcinogenic, and antidiabetic effects on human health. Here, we focus on presenting the current state of knowledge about the possibilities of modulation of particular types of potassium channels by different flavonoids. Additionally, the biological meaning of the flavonoid-mediated changes in the activity of K+ channels will be outlined. Finally, novel promising directions for further research in this area will be proposed.
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Affiliation(s)
- Monika Richter-Laskowska
- The Centre for Biomedical Engineering, Łukasiewicz Research Network—Krakow Institute of Technology, 30-418 Krakow, Poland
| | - Paulina Trybek
- Faculty of Science and Technology, University of Silesia in Katowice, 41-500 Chorzów, Poland
| | | | - Agata Wawrzkiewicz-Jałowiecka
- Department of Physical Chemistry and Technology of Polymers, Silesian University of Technology, 44-100 Gliwice, Poland
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4
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Suyambulingam A, Nair S, Chellapandian K. Synthesis, spectral characterization of novel chalcones based oxazines derivatives and screening of their antimicrobial and antioxidant activity. J Mol Struct 2022. [DOI: 10.1016/j.molstruc.2022.133708] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022]
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5
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Wu M, Xu LJ, Li Y, Yu P, Lu L, Xie ST, He YJ, Dong HB. First total syntheses of kanjone and its natural analogues. JOURNAL OF ASIAN NATURAL PRODUCTS RESEARCH 2022; 25:1-10. [PMID: 35439092 DOI: 10.1080/10286020.2022.2065266] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/24/2022] [Revised: 04/08/2022] [Accepted: 04/08/2022] [Indexed: 06/14/2023]
Abstract
Kanjone (1), a bioactive furanoflavone and a potent biomolecule, was first isolated from Pongamia pinnata (L.). Herein, we have developed two approaches to synthesize kanjone as well as its natural analogues 6-methoxyisopongaglabol (2) and 6,3'-dimethoxy-[2″,3″:7,8]furanoflavone (3) starting from khellin and 3-hydroxy-4-methoxy-benzaldehyde, respectively.
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Affiliation(s)
- Min Wu
- Antibiotics Research and Re-evaluation Key Laboratory of Sichuan Province, School of Pharmacy, Chengdu University, Chengdu 610106, China
- School of Food and Biological Engineering, Chengdu University, Chengdu 610106, China
| | - Li-Jia Xu
- Antibiotics Research and Re-evaluation Key Laboratory of Sichuan Province, School of Pharmacy, Chengdu University, Chengdu 610106, China
| | - Ying Li
- Antibiotics Research and Re-evaluation Key Laboratory of Sichuan Province, School of Pharmacy, Chengdu University, Chengdu 610106, China
| | - Pei Yu
- Antibiotics Research and Re-evaluation Key Laboratory of Sichuan Province, School of Pharmacy, Chengdu University, Chengdu 610106, China
| | - Lan Lu
- Antibiotics Research and Re-evaluation Key Laboratory of Sichuan Province, School of Pharmacy, Chengdu University, Chengdu 610106, China
| | - Shi-Ting Xie
- School of Food and Biological Engineering, Chengdu University, Chengdu 610106, China
- Engineering Research Center for Engineering Pharmaceuticals and Equipments of Sichuan Province, School of Pharmacy, Chengdu University, Chengdu 610106, China
| | - Yu-Jiao He
- Engineering Research Center for Engineering Pharmaceuticals and Equipments of Sichuan Province, School of Pharmacy, Chengdu University, Chengdu 610106, China
| | - Hong-Bo Dong
- Antibiotics Research and Re-evaluation Key Laboratory of Sichuan Province, School of Pharmacy, Chengdu University, Chengdu 610106, China
- School of Food and Biological Engineering, Chengdu University, Chengdu 610106, China
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6
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Li Y, Wu M, Dong H, Yu P, Lu L, Du W, Cao S. Total Synthesis and Anti-Inflammatory Activity of Velutone F. Nat Prod Commun 2022. [DOI: 10.1177/1934578x221076653] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Velutone F (1), a natural bioactive chalcone isolated from Millettia velutina Dunn, possesses significant anti-inflammatory activity. In this study, we have accomplished the total synthesis of velutone F (1), along with its analogues 2 and 3, from a common starting material cyclohexandione in 5 to 7 steps. The anti-inflammatory activities of compounds 1 to 3 were determined against nitric oxide (NO) production in lipopolysaccharide (LPS)-stimulated RAW264.7 cells and all of them exhibited different levels of anti-inflammatory activity.
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Affiliation(s)
- Ying Li
- Chengdu University, Chengdu, China
| | - Min Wu
- Chengdu University, Chengdu, China
- Chengdu University, Chengdu, China
| | | | - Pei Yu
- Chengdu University, Chengdu, China
| | - Lan Lu
- Chengdu University, Chengdu, China
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7
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8
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Experimental and theoretical study on DPPH radical scavenging mechanism of some chalcone quinoline derivatives. J Mol Struct 2018. [DOI: 10.1016/j.molstruc.2017.11.118] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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9
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Hibe Y, Ebe Y, Nishimura T, Yorimitsu H. Iridium-catalyzed Cleavage of C–O Bonds Using Alcohols as Reducing Reagents. CHEM LETT 2017. [DOI: 10.1246/cl.170239] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- Yuta Hibe
- Department of Chemistry, Graduate School of Science, Kyoto University, Sakyo, Kyoto 606-8502
| | - Yusuke Ebe
- Department of Chemistry, Graduate School of Science, Kyoto University, Sakyo, Kyoto 606-8502
| | - Takahiro Nishimura
- Department of Chemistry, Graduate School of Science, Kyoto University, Sakyo, Kyoto 606-8502
| | - Hideki Yorimitsu
- Department of Chemistry, Graduate School of Science, Kyoto University, Sakyo, Kyoto 606-8502
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10
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Shi WJ, Li XL, Li ZW, Shi ZJ. Nickel catalyzed reduction of arenols under mild conditions. Org Chem Front 2016. [DOI: 10.1039/c5qo00395d] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The mild Ni-catalyzed reduction of arenols features a broad substrate scope, non-sensitivity to steric hindrance and no over-reduction of the aryl ring.
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Affiliation(s)
- Wen-Juan Shi
- Beijing National Laboratory of Molecular Sciences (BNLMS) and Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education
- College of Chemistry and Molecular Engineering and Green Chemistry Center
- Peking University
- Beijing
- China
| | - Xiao-Lei Li
- Beijing National Laboratory of Molecular Sciences (BNLMS) and Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education
- College of Chemistry and Molecular Engineering and Green Chemistry Center
- Peking University
- Beijing
- China
| | - Zhao-Wei Li
- Beijing National Laboratory of Molecular Sciences (BNLMS) and Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education
- College of Chemistry and Molecular Engineering and Green Chemistry Center
- Peking University
- Beijing
- China
| | - Zhang-Jie Shi
- Beijing National Laboratory of Molecular Sciences (BNLMS) and Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education
- College of Chemistry and Molecular Engineering and Green Chemistry Center
- Peking University
- Beijing
- China
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11
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Tobisu M, Morioka T, Ohtsuki A, Chatani N. Nickel-catalyzed reductive cleavage of aryl alkyl ethers to arenes in absence of external reductant. Chem Sci 2015; 6:3410-3414. [PMID: 29511506 PMCID: PMC5659071 DOI: 10.1039/c5sc00305a] [Citation(s) in RCA: 92] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2015] [Accepted: 03/25/2015] [Indexed: 11/21/2022] Open
Abstract
The reductive cleavage of the C-O bonds of aryl ethers has great potential in organic synthesis. Although several catalysts that can promote the reductive cleavage of aryl ethers have been reported, all such systems require the use of an external reductant, e.g., hydrosilane or hydrogen. Here, we report the development of a new nickel-based catalytic system that can cleave the C-O bonds of ethers in the absence of an external reductant. The hydrogen atom required in this new reductive cleavage reaction is provided by the alkoxy group of the substrate, which serves as an internal reductant. The absence of an external reductant enables the unique chemoselectivity, i.e., the selective reduction of an alkoxy group over alkenes and ketones.
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Affiliation(s)
- Mamoru Tobisu
- Department of Applied Chemistry , Faculty of Engineering , Osaka University , Suita , Osaka 565-0871 , Japan . ;
- Center for Atomic and Molecular Technologies , Graduate School of Engineering , Osaka University , Suita , Osaka 565-0871 , Japan
- ESICB , Kyoto University , Katsura , Kyoto 615-8510 , Japan
| | - Toshifumi Morioka
- Department of Applied Chemistry , Faculty of Engineering , Osaka University , Suita , Osaka 565-0871 , Japan . ;
| | - Akimichi Ohtsuki
- Center for Atomic and Molecular Technologies , Graduate School of Engineering , Osaka University , Suita , Osaka 565-0871 , Japan
| | - Naoto Chatani
- Department of Applied Chemistry , Faculty of Engineering , Osaka University , Suita , Osaka 565-0871 , Japan . ;
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12
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Iranpoor N, Panahi F. Nickel-Catalyzed One-Pot Deoxygenation and Reductive Homocoupling of Phenols via C–O Activation Using TCT Reagent. Org Lett 2014; 17:214-7. [DOI: 10.1021/ol503560e] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- Nasser Iranpoor
- Department
of Chemistry, College of Sciences, Shiraz University, Shiraz 71454, Iran
| | - Farhad Panahi
- Department
of Chemistry, College of Sciences, Shiraz University, Shiraz 71454, Iran
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13
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Najiya A, Panicker CY, Sapnakumari M, Narayana B, Sarojini BK, Van Alsenoy C. Molecular structure, FT-IR, first order hyperpolarizability, NBO analysis, HOMO and LUMO, MEP analysis of (E)-3-(4-chlorophenyl)-1-(4-fluorophenyl)prop-2-en-1-one by HF and density functional methods. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2014; 133:526-533. [PMID: 24983921 DOI: 10.1016/j.saa.2014.06.049] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/23/2014] [Revised: 05/17/2014] [Accepted: 06/03/2014] [Indexed: 06/03/2023]
Abstract
(E)-3-(4-Chlorophenyl)-1-(4-fluorophenyl)prop-2-en-1-one is synthesized by reacting 4-fluoroacetophenone and 4-chlorobenzaldehyde in ethanol in the presence of sodium hydroxide. The structure of the compound was confirmed by IR and single crystal X-ray diffraction studies. FT-IR spectrum of (E)-3-(4-chlorophenyl)-1-(4-fluorophenyl)prop-2-en-1-one was recorded and analyzed. The crystal structure is also described. The vibrational wavenumbers were calculated using HF and DFT methods and are assigned with the help of potential energy distribution method. The geometrical parameters of the title compound obtained from XRD studies are in agreement with the calculated (DFT) values. The stability of the molecule arising from hyper-conjugative interaction and charge delocalization has been analyzed using NBO analysis. The calculated first hyperpolarizability of the title compound is comparable with the reported values of similar derivatives and 63.85 times that of the standard NLO material urea. The HOMO-LUMO transition implies an electron density transfer from the chlorophenyl ring to the fluorophenyl ring. From the MEP analysis it is evident that the negative charge covers the CO group and the positive region is over the phenyl rings.
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Affiliation(s)
- A Najiya
- Department of Physics, TKM College of Arts and Science, Kollam, Kerala, India
| | - C Yohannan Panicker
- Department of Physics, TKM College of Arts and Science, Kollam, Kerala, India.
| | - M Sapnakumari
- Department of Studies in Chemistry, Mangalore University, Mangalagangotri, Karnataka, India
| | - B Narayana
- Department of Studies in Chemistry, Mangalore University, Mangalagangotri, Karnataka, India
| | - B K Sarojini
- Industrial Chemistry-Division, Department of Studies in Chemistry, Mangalore University, Mangalagangotri, Karnataka, India
| | - C Van Alsenoy
- Department of Chemistry, University of Antwerp, B2610 Antwerp, Belgium
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14
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Goodarzi M, Saeys W, de Araujo MCU, Galvão RKH, Vander Heyden Y. Binary classification of chalcone derivatives with LDA or KNN based on their antileishmanial activity and molecular descriptors selected using the Successive Projections Algorithm feature-selection technique. Eur J Pharm Sci 2014; 51:189-95. [PMID: 24090733 DOI: 10.1016/j.ejps.2013.09.019] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2013] [Revised: 09/14/2013] [Accepted: 09/20/2013] [Indexed: 11/19/2022]
Abstract
Chalcones are naturally occurring aromatic ketones, which consist of an α-, β-unsaturated carbonyl system joining two aryl rings. These compounds are reported to exhibit several pharmacological activities, including antiparasitic, antibacterial, antifungal, anticancer, immunomodulatory, nitric oxide inhibition and anti-inflammatory effects. In the present work, a Quantitative Structure-Activity Relationship (QSAR) study is carried out to classify chalcone derivatives with respect to their antileishmanial activity (active/inactive) on the basis of molecular descriptors. For this purpose, two techniques to select descriptors are employed, the Successive Projections Algorithm (SPA) and the Genetic Algorithm (GA). The selected descriptors are initially employed to build Linear Discriminant Analysis (LDA) models. An additional investigation is then carried out to determine whether the results can be improved by using a non-parametric classification technique (One Nearest Neighbour, 1NN). In a case study involving 100 chalcone derivatives, the 1NN models were found to provide better rates of correct classification than LDA, both in the training and test sets. The best result was achieved by a SPA-1NN model with six molecular descriptors, which provided correct classification rates of 97% and 84% for the training and test sets, respectively.
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Affiliation(s)
- Mohammad Goodarzi
- Department of Biosystems, Faculty of Bioscience Engineering, Katholieke Universiteit Leuven - KULeuven, Kasteelpark Arenberg 30, B-3001 Heverlee, Belgium.
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15
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Chow WK, So CM, Lau CP, Kwong FY. Palladium-catalyzed reductive cleavage of tosylated arenes using isopropanol as the mild reducing agent. Org Chem Front 2014. [DOI: 10.1039/c4qo00103f] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The reduction (deuteration) of oxygenated arenes can be achieved by Pd/CM-phos catalyst system via a tosylation pathway.
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Affiliation(s)
- Wing Kin Chow
- State Key Laboratory of Chirosciences
- Department of Applied Biology and Chemical Technology
- The Hong Kong Polytechnic University
- Kowloon, Hong Kong
| | - Chau Ming So
- State Key Laboratory of Chirosciences
- Department of Applied Biology and Chemical Technology
- The Hong Kong Polytechnic University
- Kowloon, Hong Kong
| | - Chak Po Lau
- State Key Laboratory of Chirosciences
- Department of Applied Biology and Chemical Technology
- The Hong Kong Polytechnic University
- Kowloon, Hong Kong
| | - Fuk Yee Kwong
- State Key Laboratory of Chirosciences
- Department of Applied Biology and Chemical Technology
- The Hong Kong Polytechnic University
- Kowloon, Hong Kong
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16
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17
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Amin KM, Awadalla FM, Eissa AA, Abou-Seri SM, Hassan GS. Design, synthesis and vasorelaxant evaluation of novel coumarin–pyrimidine hybrids. Bioorg Med Chem 2011; 19:6087-97. [DOI: 10.1016/j.bmc.2011.08.037] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2011] [Revised: 08/09/2011] [Accepted: 08/15/2011] [Indexed: 01/27/2023]
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18
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Tobisu M, Yamakawa K, Shimasaki T, Chatani N. Nickel-catalyzed reductive cleavage of aryl–oxygen bonds in alkoxy- and pivaloxyarenes using hydrosilanes as a mild reducing agent. Chem Commun (Camb) 2011; 47:2946-8. [DOI: 10.1039/c0cc05169a] [Citation(s) in RCA: 152] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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19
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Castle NA. Pharmacological modulation of voltage-gated potassium channels as a therapeutic strategy. Expert Opin Ther Pat 2010; 20:1471-503. [PMID: 20726689 DOI: 10.1517/13543776.2010.513384] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
IMPORTANCE OF THE FIELD The human genome encodes at least 40 distinct voltage-gated potassium channel subtypes, which vary in regional expression, pharmacological and biophysical properties. Voltage-dependent potassium (Kv) channels help orchestrate many of the physiological and pathophysiological processes that promote and sometimes hinder the healthy functioning of our bodies. AREAS COVERED IN THIS REVIEW This review summarizes patent and scientific literature reports from the past decade highlighting the opportunities that Kv channels offer for the development of new therapeutic interventions for a wide variety of disorders. WHAT THE READER WILL GAIN The reader will gain an insight from an analysis of the associations of different Kv family members with disease processes, summary and evaluation of the development of therapeutically relevant pharmacological modulators of these channels, particularly focusing on proprietary agents being developed. TAKE HOME MESSAGE Development of new drugs that target Kv channels continue to be of great interest but is proving to be challenging. Nevertheless, opportunities for Kv channel modulators to have an impact on a wide range of disorders in the future remain an exciting prospect.
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Oguchi T, Watanabe K, Ohkubo K, Abe H, Katoh T. Enantioselective total synthesis of (-)-candelalides A, B and C: potential Kv1.3 blocking immunosuppressive agents. Chemistry 2009; 15:2826-45. [PMID: 19191240 DOI: 10.1002/chem.200802122] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
Novel Kv1.3 blocking immunosuppressants, (-)-candelalides A, B and C, were efficiently synthesized for the first time in a convergent and unified manner starting from (+)-5-methyl-Wieland-Miescher ketone. The synthetic method involved the following key steps: i) a strategic [2,3]-Wittig rearrangement of a stannylmethyl ether to install the stereogenic center at C9 and the exo-methylene function at C8 present in the decalin portion; ii) a straightforward coupling of a trans-decalin portion (BC ring) and a gamma-pyrone moiety through the C16-C3' bond to assemble the requisite carbon framework; and iii) a construction of a characteristic di or tetrahydropyran ring (A ring) by internal nucleophilic ring closure of a hydroxy aldehyde or a hydroxy epoxide. The present total synthesis has fully established the absolute configuration of these natural products.
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Affiliation(s)
- Takamasa Oguchi
- Laboratory of Synthetic Medicinal Chemistry, Department of Chemical Pharmaceutical Science, Tohoku Pharmaceutical University, 4-4-1 Komatsushima, Aoba-ku, Sendai, 981-8558, Japan
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Inhibitors of potassium channels KV1.3 and IK-1 as immunosuppressants. Bioorg Med Chem Lett 2009; 19:2299-304. [PMID: 19282171 DOI: 10.1016/j.bmcl.2009.02.077] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2008] [Revised: 02/19/2009] [Accepted: 02/20/2009] [Indexed: 11/22/2022]
Abstract
New structural classes of K(V)1.3 and IK-1 ion channel blockers have been identified based on a virtual high throughput screening approach using a homology model of KcsA. These compounds display inhibitory effects on T-cell and/or keratinocyte proliferation and immunosuppressant activity within a DTH animal model.
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