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Ultrasonic-Assisted Synthesis of Benzofuran Appended Oxadiazole Molecules as Tyrosinase Inhibitors: Mechanistic Approach through Enzyme Inhibition, Molecular Docking, Chemoinformatics, ADMET and Drug-Likeness Studies. Int J Mol Sci 2022; 23:ijms231810979. [PMID: 36142889 PMCID: PMC9500974 DOI: 10.3390/ijms231810979] [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: 08/07/2022] [Revised: 09/05/2022] [Accepted: 09/13/2022] [Indexed: 11/16/2022] Open
Abstract
Furan-oxadiazole structural hybrids belong to the most promising and biologically active classes of oxygen and nitrogen containing five member heterocycles which have expanded therapeutic scope and potential in the fields of pharmacology, medicinal chemistry and pharmaceutics. A novel series 5a-j of benzofuran-oxadiazole molecules incorporating S-alkylated amide linkage have been synthesized using ultrasonic irradiation and screened for bacterial tyrosinase inhibition activity. Most of the synthesized furan-oxadiazole structural motifs exhibited significant tyrosinase inhibition activity in the micromolar range, with one of the derivatives being more potent than the standard drug ascorbic acid. Among the tested compounds, the scaffold 5a displayed more tyrosinase inhibition efficacy IC50 (11 ± 0.25 μM) than the ascorbic acid IC50 (11.5 ± 0.1 μM). Compounds 5b, 5c and 5d efficiently inhibited bacterial tyrosinase with IC50 values in the range of 12.4 ± 0.0-15.5 ± 0.0 μM. The 2-fluorophenylacetamide containing furan-oxadiazole compound 5a may be considered as a potential lead for tyrosinase inhibition with lesser side effects as a skin whitening and malignant melanoma anticancer agent.
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Kruakaew S, Singha S, Sangvichien E, Yahuafai J, Sutthivaiyakit S. Neolignans from Myristica fragrans seeds, revision of their absolute configurations, reduction products and biological activities. PHYTOCHEMISTRY 2022; 199:113174. [PMID: 35358598 DOI: 10.1016/j.phytochem.2022.113174] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/23/2021] [Revised: 03/15/2022] [Accepted: 03/20/2022] [Indexed: 06/14/2023]
Abstract
Chromatographic purification of the CH2Cl2 extract of Myristica fragrans seeds provided 19 known compounds, four dihydrofuran neolignans, licarines A, B and maceneolignans A, B were among the isolates. Prior to hydrogenation, in order to obtain their di- and tetrahydrogenated products, the absolute configuration of these compounds was thoroughly investigated based on their optical rotations and ECD spectra. This report provides evidences concerning the disagreement between the use of an aromatic quadrant rule and time-dependent density function theory calculation for the prediction of the absolute configurations at C-7 and C-8 in these dihydrobenzofuran neolignans. The absolute configurations of licarines A, B and maceneolignans A, B were subsequently redefined. The antimicrobial and cytotoxic activities of the isolates and reduction products of licarines A, B and maceneolignans A, B were also investigated.
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Affiliation(s)
- Sudarat Kruakaew
- Department of Chemistry and Center of Excellence for Innovation in Chemistry, Faculty of Science, Ramkhamhaeng University, Hua Mark, Bangkapi, Bangkok, 10240, Thailand
| | - Suriphon Singha
- Department of Chemistry and Center of Excellence for Innovation in Chemistry, Faculty of Science, Ramkhamhaeng University, Hua Mark, Bangkapi, Bangkok, 10240, Thailand
| | - Ek Sangvichien
- Department of Biology, Faculty of Science, Ramkhamhaeng University, Hua Mark, Bangkapi, Bangkok, 10240, Thailand
| | - Jantana Yahuafai
- Research Transfer and Academic Support Division, National Cancer Institute, Rama VI Road, Bangkok, 10400, Thailand
| | - Somyote Sutthivaiyakit
- Department of Chemistry and Center of Excellence for Innovation in Chemistry, Faculty of Science, Ramkhamhaeng University, Hua Mark, Bangkapi, Bangkok, 10240, Thailand.
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Irfan A, Faiz S, Rasul A, Zafar R, Zahoor AF, Kotwica-Mojzych K, Mojzych M. Exploring the Synergistic Anticancer Potential of Benzofuran-Oxadiazoles and Triazoles: Improved Ultrasound- and Microwave-Assisted Synthesis, Molecular Docking, Hemolytic, Thrombolytic and Anticancer Evaluation of Furan-Based Molecules. Molecules 2022; 27:1023. [PMID: 35164286 PMCID: PMC8838991 DOI: 10.3390/molecules27031023] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2021] [Revised: 01/27/2022] [Accepted: 01/27/2022] [Indexed: 01/06/2023] Open
Abstract
Ultrasound- and microwave-assisted green synthetic strategies were applied to furnish benzofuran-oxadiazole 5a-g and benzofuran-triazole 7a-h derivatives in good to excellent yields (60-96%), in comparison with conventional methods (36-80% yield). These synthesized derivatives were screened for hemolysis, thrombolysis and anticancer therapeutic potential against an A549 lung cancer cell line using an MTT assay. Derivatives 7b (0.1%) and 5e (0.5%) showed the least toxicity against RBCs. Hybrid 7f showed excellent thrombolysis activity (61.4%) when compared against reference ABTS. The highest anticancer activity was displayed by the 5d structural hybridwith cell viability 27.49 ± 1.90 and IC50 6.3 ± 0.7 μM values, which were considerably lower than the reference drug crizotinib (IC50 8.54 ± 0.84 μM). Conformational analysis revealed the spatial arrangement of compound 5d, which demonstrated its significant potency in comparison with crizotinib; therefore, scaffold 5d would be a promising anticancer agent on the basis of cytotoxicity studies, as well as in silico modeling studies.
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Affiliation(s)
- Ali Irfan
- Department of Chemistry, Government College University Faisalabad, Faisalabad 38000, Pakistan; (A.I.); (S.F.)
| | - Sadia Faiz
- Department of Chemistry, Government College University Faisalabad, Faisalabad 38000, Pakistan; (A.I.); (S.F.)
| | - Azhar Rasul
- Department of Zoology, Government College University Faisalabad, Faisalabad 38000, Pakistan;
| | - Rehman Zafar
- Department of Pharmaceutical Chemistry, Riphah International University, Islamabad 44000, Pakistan;
| | - Ameer Fawad Zahoor
- Department of Chemistry, Government College University Faisalabad, Faisalabad 38000, Pakistan; (A.I.); (S.F.)
| | - Katarzyna Kotwica-Mojzych
- Department of Histology, Embryology and Cytophysiology, Medical University of Lublin, Radziwiłłowska 11, 20-080 Lublin, Poland;
| | - Mariusz Mojzych
- Department of Chemistry, Siedlce University of Natural Sciences and Humanities, 3-Go Maja 54, 08-110 Siedlce, Poland
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Llopis N, Baeza A. HFIP-Promoted Synthesis of Substituted Tetrahydrofurans by Reaction of Epoxides with Electron-Rich Alkenes. Molecules 2020; 25:E3464. [PMID: 32751509 PMCID: PMC7435839 DOI: 10.3390/molecules25153464] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2020] [Revised: 07/26/2020] [Accepted: 07/28/2020] [Indexed: 11/17/2022] Open
Abstract
In the present work, the employment of fluorinated alcohols, specifically 1,1,1,3,3,3-hexafluoroisopropanol (HFIP), as solvent and promoter of the catalyst-free synthesis of substituted tetrahydrofuranes through the addition of electron-rich alkenes to epoxydes is described. The unique properties of this fluorinated alcohol, which is very different from their non-fluorinated analogs, allows carrying out this new straightforward protocol under smooth reaction conditions affording the corresponding adducts in moderate yields in the majority of cases. Remarkably, this methodology has allowed the synthesis of new tetrahydrofuran-based spiro compounds as well as tetrahydrofurobenzofuran derivatives. The scope and limitations of the process are also discussed. Mechanistic studies were also performed pointing towards a purely ionic or a SN2-type process depending on the nucleophilicity of the alkene employed.
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Affiliation(s)
| | - Alejandro Baeza
- Departamento de Química Orgánica and Instituto de Síntesis Orgánica (ISO), Facultad de Ciencias, Universidad de Alicante. Apdo. 99, E-03080 Alicante, Spain;
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Chen Z, Pitchakuntla M, Jia Y. Synthetic approaches to natural products containing 2,3-dihydrobenzofuran skeleton. Nat Prod Rep 2019; 36:666-690. [DOI: 10.1039/c8np00072g] [Citation(s) in RCA: 52] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
This review describes the synthetic approaches to natural products containing the 2,3-dihydrobenzofuran (2,3-DHB) skeleton.
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Affiliation(s)
- Zhuang Chen
- State Key Laboratory of Natural and Biomimetic Drugs
- School of Pharmaceutical Sciences
- Peking University
- Beijing 100191
- China
| | - Mallesham Pitchakuntla
- State Key Laboratory of Natural and Biomimetic Drugs
- School of Pharmaceutical Sciences
- Peking University
- Beijing 100191
- China
| | - Yanxing Jia
- State Key Laboratory of Natural and Biomimetic Drugs
- School of Pharmaceutical Sciences
- Peking University
- Beijing 100191
- China
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Silva AR, Polo EC, Martins NC, Correia CRD. Enantioselective Oxy-Heck-Matsuda Arylations: Expeditious Synthesis of Dihydrobenzofuran Systems and Total Synthesis of the Neolignan (−)-Conocarpan. Adv Synth Catal 2018. [DOI: 10.1002/adsc.201701278] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Allan R. Silva
- Institute of Chemistry; University of Campinas, UNICAMP, Campinas; São Paulo Brazil
| | - Ellen C. Polo
- Institute of Chemistry; University of Campinas, UNICAMP, Campinas; São Paulo Brazil
| | - Nelson C. Martins
- Institute of Chemistry; University of Campinas, UNICAMP, Campinas; São Paulo Brazil
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Jiang ZH, Liu YP, Huang ZH, Wang TT, Feng XY, Yue H, Guo W, Fu YH. Cytotoxic dihydrobenzofuran neolignans from Mappianthus iodoies. Bioorg Chem 2017; 75:260-264. [PMID: 29040842 DOI: 10.1016/j.bioorg.2017.10.003] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2017] [Revised: 10/01/2017] [Accepted: 10/03/2017] [Indexed: 11/16/2022]
Abstract
Three new dihydrobenzofuran neolignans, mappiodoinins A-C (1-3), together with nine known analogues (4 -12) were isolated from the stems and leaves of Mappianthus iodoies. Their structures with the absolute configurations were elucidated by extensive spectroscopic methods. This is the first time to find dihydrobenzofuran neolignans from the genus Mappianthus. All isolated compounds were evaluated for their cytotoxicities against five human cancer cell lines: HL-60, SMMC-7721, A-549, MCF-7 and SW-480 in vitro. Neolignans 1-12 showed significant cytotoxic effects against various human cancer cell lines with IC50 values ranging from 0.16 to 18.62 μM.
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Affiliation(s)
- Zhi-Hua Jiang
- Key Laboratory of Tropical Medicinal Plant Chemistry of Ministry of Education, Hainan Normal University, Haikou 571158, PR China; College of Pharmacy, Fujian University of Traditional Chinese Medicine, Fuzhou 350122, PR China
| | - Yan-Ping Liu
- Key Laboratory of Tropical Medicinal Plant Chemistry of Ministry of Education, Hainan Normal University, Haikou 571158, PR China
| | - Ze-Hao Huang
- College of Pharmacy, Fujian University of Traditional Chinese Medicine, Fuzhou 350122, PR China
| | - Ting-Ting Wang
- Key Laboratory of Tropical Medicinal Plant Chemistry of Ministry of Education, Hainan Normal University, Haikou 571158, PR China
| | - Xing-Yang Feng
- Key Laboratory of Tropical Medicinal Plant Chemistry of Ministry of Education, Hainan Normal University, Haikou 571158, PR China
| | - Hao Yue
- Key Laboratory of Tropical Medicinal Plant Chemistry of Ministry of Education, Hainan Normal University, Haikou 571158, PR China
| | - Wei Guo
- Key Laboratory of Tropical Medicinal Plant Chemistry of Ministry of Education, Hainan Normal University, Haikou 571158, PR China
| | - Yan-Hui Fu
- Key Laboratory of Tropical Medicinal Plant Chemistry of Ministry of Education, Hainan Normal University, Haikou 571158, PR China; College of Pharmacy, Fujian University of Traditional Chinese Medicine, Fuzhou 350122, PR China.
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Natori Y, Tsutsui H, Sato N, Nakamura S, Nambu H, Shiro M, Hashimoto S. Asymmetric synthesis of neolignans (-)-epi-conocarpan and (+)-conocarpan via Rh(II)-catalyzed C-H insertion process and revision of the absolute configuration of (-)-epi-conocarpan. J Org Chem 2009; 74:4418-21. [PMID: 19408907 DOI: 10.1021/jo900502d] [Citation(s) in RCA: 74] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Catalytic asymmetric synthesis of neolignan natural products (-)-epi-conocarpan and (+)-conocarpan has been achieved by exploiting an enantio- and diastereoselective intramolecular C-H insertion reaction to construct a cis-2-aryl-2,3-dihydrobenzofuran ring system as a key step. The C-H insertion reaction of 5-bromoaryldiazoacetate catalyzed by Rh(2)(S-PTTEA)(4), a new dirhodium(II) carboxylate complex that incorporates N-phthaloyl-(S)-triethylalaninate as chiral bridging ligands, provided 2-aryl-5-bromo-3-methoxycarbonyl-2,3-dihydrobenzofuran with exceptionally high diastereoselectivity (cis/trans = 97:3) and high enantioselectivity for the cis isomer (84% ee).
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Affiliation(s)
- Yoshihiro Natori
- Faculty of Pharmaceutical Sciences, Hokkaido University, Sapporo 060-0812, Japan
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Kouznetsov VV, Merchan Arenas DR, Romero Bohórquez AR. PEG-400 as green reaction medium for Lewis acid-promoted cycloaddition reactions with isoeugenol and anethole. Tetrahedron Lett 2008. [DOI: 10.1016/j.tetlet.2008.03.049] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Clive DLJ, Stoffman EJL. Synthesis of (-)-conocarpan by two routes based on radical cyclization and establishment of its absolute configuration. Org Biomol Chem 2008; 6:1831-42. [PMID: 18452020 DOI: 10.1039/b801858h] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Two independent routes for the total synthesis of the bioactive neolignan (-)-conocarpan are described. The first (98% ee) is based on formal radical cyclization onto a benzene ring, and involves a 5-exo-trigonal closure onto a double bond restrained within a 6-membered ring. The second route (88% ee), which is shorter, is based on 5-exo-trigonal cyclization of an aryl radical onto a pendant terminal double bond. The two routes differ in their degree of stereoselectivity. The absolute configuration originally assigned to (+)-conocarpan had previously been called into question on the basis of empirical chiroptical rules; the present chemical work confirms the need for revision, and the assigned absolute configurations of several compounds correlated with (+)-conocarpan must also be changed.
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Affiliation(s)
- Derrick L J Clive
- Chemistry Department, University of Alberta, Edmonton, Alberta T6G 2G2, Canada.
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