51
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Yuan X, Yang Q, Liu T, Li K, Liu Y, Zhu C, Zhang Z, Li L, Zhang C, Xie M, Lin J, Zhang J, Jin Y. Design, synthesis and in vitro evaluation of 6-amide-2-aryl benzoxazole/benzimidazole derivatives against tumor cells by inhibiting VEGFR-2 kinase. Eur J Med Chem 2019; 179:147-165. [PMID: 31252306 DOI: 10.1016/j.ejmech.2019.06.054] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2019] [Revised: 06/19/2019] [Accepted: 06/19/2019] [Indexed: 12/24/2022]
Abstract
Herein, we have carried out a structural optimization campaign to discover the novel anti-tumor agents with our previously screened YQY-26 as the hit compound. A library of thirty-seven 6-amide-2-aryl benzoxazole/benzimidazole derivatives has been designed and synthesized based on the highly conserved active site of VEGFR-2. Several title compounds exhibited selective inhibitory activities against VEGFR-2 than EGFR kinases, which also displayed selective anti-proliferation potency against the HUVEC and HepG2 than the A549 and MDA-MB-231 cancer cell lines. The newly synthesized compounds were evaluated for anti-angiogenesis capability by chick chorioallantoic membrane (CAM) assay. Among them, compounds 9d showed the most potent anti-angiogenesis ability (79% inhibition at 10 nM/eggs), the efficient cytotoxic activities (in vitro against the HUVEC and HepG2 cell lines with IC50 values of 1.47 and 2.57 μM, respectively), and excellent VEGFR-2 kinase inhibition (IC50 = 0.051 μM). The molecular docking analysis revealed that compound 9d is a Type II inhibitor of VEGFR-2 kinase. These results indicated that the 6-amide-2-arylbenzoxazole and 6-amide-2-aryl benzimidazole derivatives are promising inhibitors of VEGFR-2 kinase for the potential treatment of anti-angiogenesis.
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Affiliation(s)
- Xu Yuan
- Key Laboratory of Medicinal Chemistry for Natural Resource, Ministry Education and Yunnan Province, School of Chemical Science and Technology, Yunnan University, Kunming, 650091, PR China
| | - Qingyi Yang
- Key Laboratory of Medicinal Chemistry for Natural Resource, Ministry Education and Yunnan Province, School of Chemical Science and Technology, Yunnan University, Kunming, 650091, PR China; School of Clinical Medicine, Dehong Vocational College, Mangshi, 678400, China
| | - Tongyan Liu
- Laboratory of Molecular Genetics of Aging and Tumor, Medical School, Kunming University of Science and Technology, Kunming, 650500, PR China
| | - Ke Li
- Biomedical Department, Yunnan Cancer Hospital, The Third Affiliated Hospital of Kunming Medical University, Kunming, 650118, PR China.
| | - Yuwen Liu
- Key Laboratory of Medicinal Chemistry for Natural Resource, Ministry Education and Yunnan Province, School of Chemical Science and Technology, Yunnan University, Kunming, 650091, PR China
| | - Changcheng Zhu
- Institute of Drug Research and Development, Kunming Pharmaceutical Corporation, Kunming, 650100, PR China
| | - Zhiyun Zhang
- Department of Anorectal, Kunming Municipal Hospital of Traditional Chinese Medicine, Kunming, 650011, PR China
| | - Linghua Li
- Department of Anorectal, Kunming Municipal Hospital of Traditional Chinese Medicine, Kunming, 650011, PR China
| | - Conghai Zhang
- Key Laboratory of Medicinal Chemistry for Natural Resource, Ministry Education and Yunnan Province, School of Chemical Science and Technology, Yunnan University, Kunming, 650091, PR China
| | - Mingjin Xie
- Key Laboratory of Medicinal Chemistry for Natural Resource, Ministry Education and Yunnan Province, School of Chemical Science and Technology, Yunnan University, Kunming, 650091, PR China
| | - Jun Lin
- Key Laboratory of Medicinal Chemistry for Natural Resource, Ministry Education and Yunnan Province, School of Chemical Science and Technology, Yunnan University, Kunming, 650091, PR China.
| | - Jihong Zhang
- Laboratory of Molecular Genetics of Aging and Tumor, Medical School, Kunming University of Science and Technology, Kunming, 650500, PR China.
| | - Yi Jin
- Key Laboratory of Medicinal Chemistry for Natural Resource, Ministry Education and Yunnan Province, School of Chemical Science and Technology, Yunnan University, Kunming, 650091, PR China.
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Zi M, Liu F, Wu D, Li K, Zhang D, Zhu C, Zhang Z, Li L, Zhang C, Xie M, Lin J, Zhang J, Jin Y. Discovery of 6-Arylurea-2-arylbenzoxazole and 6-Arylurea-2-arylbenzimidazole Derivatives as Angiogenesis Inhibitors: Design, Synthesis and in vitro Biological Evaluation. ChemMedChem 2019; 14:1291-1302. [PMID: 31131561 DOI: 10.1002/cmdc.201900216] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2019] [Revised: 05/22/2019] [Indexed: 12/15/2022]
Abstract
We embarked on a structural optimization campaign aimed at the discovery of novel anti-angiogenesis agents with previously reported imidazole kinase inhibitors as a lead compound. A library of 29 compounds was synthesized. Several title compounds exhibited selective inhibitory activities against vascular endothelial growth factor receptor 2 (VEGFR-2) over epidermal growth factor receptor (EGFR) kinase; these compounds also displayed selective and potent antiproliferative activity against three cancer cell lines. The newly synthesized compounds were evaluated for anti-angiogenesis activity by chick chorioallantoic membrane (CAM) assay. Among them, 1-(2-(2-chlorophenyl)benzo[d]oxazol-5-yl)-3-(4-(trifluoromethoxy)phenyl)urea (compound 5 n) showed the most potent anti-angiogenesis capacity, efficient cytotoxic activities (in vitro against human umbilical vein endothelial cells (HUVEC), H1975, A549, and HeLa cell lines, with respective IC50 values of 8.46, 1.40, 7.61, and 0.28 μm), and an acceptable level of VEGFR-2 kinase inhibition (IC50 =0.25 μm). Molecular docking analysis revealed 5 n to be a type II inhibitor of VEGFR-2 kinase. In general, these results indicate that these 6-arylurea-2-arylbenzoxazole/benzimidazole derivatives are promising inhibitors of VEGFR-2 kinase for potential development into anti-angiogenesis drugs.
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Affiliation(s)
- Mengli Zi
- Key Laboratory of Medicinal Chemistry for Natural Resources, Ministry of Education and Yunnan Province, School of Chemical Science and Technology, Yunnan University, Kunming, 650091, P.R. China
| | - Feifei Liu
- Laboratory of Molecular Genetics of Aging and Tumors, Medical School, Kunming University of Science and Technology, Kunming, 650500, P.R. China
| | - Di Wu
- Key Laboratory of Medicinal Chemistry for Natural Resources, Ministry of Education and Yunnan Province, School of Chemical Science and Technology, Yunnan University, Kunming, 650091, P.R. China
| | - Ke Li
- Biomedical Department, Yunnan Cancer Hospital, Third Affiliated Hospital of Kunming Medical University, Kunming, 650118, P.R. China
| | - Da Zhang
- Key Laboratory of Medicinal Chemistry for Natural Resources, Ministry of Education and Yunnan Province, School of Chemical Science and Technology, Yunnan University, Kunming, 650091, P.R. China
| | - Changcheng Zhu
- Institute of Drug Research and Development, Kunming Pharmaceutical Corporation, Kunming, 650100, P.R. China
| | - Zhiyun Zhang
- Department of Anorectal, Kunming Municipal Hospital of Traditional Chinese Medicine, Kunming, 650011, P.R. China
| | - Linghua Li
- Department of Anorectal, Kunming Municipal Hospital of Traditional Chinese Medicine, Kunming, 650011, P.R. China
| | - Conghai Zhang
- Key Laboratory of Medicinal Chemistry for Natural Resources, Ministry of Education and Yunnan Province, School of Chemical Science and Technology, Yunnan University, Kunming, 650091, P.R. China
| | - Mingjin Xie
- Key Laboratory of Medicinal Chemistry for Natural Resources, Ministry of Education and Yunnan Province, School of Chemical Science and Technology, Yunnan University, Kunming, 650091, P.R. China
| | - Jun Lin
- Key Laboratory of Medicinal Chemistry for Natural Resources, Ministry of Education and Yunnan Province, School of Chemical Science and Technology, Yunnan University, Kunming, 650091, P.R. China
| | - Jihong Zhang
- Laboratory of Molecular Genetics of Aging and Tumors, Medical School, Kunming University of Science and Technology, Kunming, 650500, P.R. China
| | - Yi Jin
- Key Laboratory of Medicinal Chemistry for Natural Resources, Ministry of Education and Yunnan Province, School of Chemical Science and Technology, Yunnan University, Kunming, 650091, P.R. China
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53
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Mishra VR, Ghanavatkar CW, Mali SN, Qureshi SI, Chaudhari HK, Sekar N. Design, synthesis, antimicrobial activity and computational studies of novel azo linked substituted benzimidazole, benzoxazole and benzothiazole derivatives. Comput Biol Chem 2019; 78:330-337. [DOI: 10.1016/j.compbiolchem.2019.01.003] [Citation(s) in RCA: 70] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2018] [Revised: 01/04/2019] [Accepted: 01/07/2019] [Indexed: 02/08/2023]
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54
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Li F, Li Z, Tang X, Cao X, Wang C, Li J, Wang L. Hemoglobin: A New Biocatalyst for the Synthesis of 2-substituted Benzoxazoles via
Oxidative Cyclization. ChemCatChem 2019. [DOI: 10.1002/cctc.201801760] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- Fengxi Li
- Key Laboratory of Molecular Enzymology and Engineering of Ministry of Education, School of Life Sciences; Jilin University; Changchun 130023 P. R. China
| | - Zhengqiang Li
- Key Laboratory of Molecular Enzymology and Engineering of Ministry of Education, School of Life Sciences; Jilin University; Changchun 130023 P. R. China
| | - Xuyong Tang
- Key Laboratory of Molecular Enzymology and Engineering of Ministry of Education, School of Life Sciences; Jilin University; Changchun 130023 P. R. China
| | - Xinyu Cao
- Key Laboratory of Molecular Enzymology and Engineering of Ministry of Education, School of Life Sciences; Jilin University; Changchun 130023 P. R. China
| | - Chunyu Wang
- State Key Laboratory of Supramolecular Structure and Materials; Jilin University; Changchun 130023 P. R. China
| | - Jialin Li
- Key Laboratory of Molecular Enzymology and Engineering of Ministry of Education, School of Life Sciences; Jilin University; Changchun 130023 P. R. China
| | - Lei Wang
- Key Laboratory of Molecular Enzymology and Engineering of Ministry of Education, School of Life Sciences; Jilin University; Changchun 130023 P. R. China
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Liu QQ, Lu K, Zhu HM, Kong SL, Yuan JM, Zhang GH, Chen NY, Gu CX, Pan CX, Mo DL, Su GF. Identification of 3-(benzazol-2-yl)quinoxaline derivatives as potent anticancer compounds: Privileged structure-based design, synthesis, and bioactive evaluation in vitro and in vivo. Eur J Med Chem 2019; 165:293-308. [PMID: 30685528 DOI: 10.1016/j.ejmech.2019.01.004] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2018] [Revised: 12/27/2018] [Accepted: 01/02/2019] [Indexed: 12/29/2022]
Abstract
Inspired by the common structural characteristics of numerous known antitumor compounds targeting DNA or topoisomerase I, 3-(benzazol-2-yl)-quinoxaline-based scaffold was designed via the combination of two important privileged structure units -quinoxaline and benzazole. Thirty novel 3-(benzazol-2-yl)-quinoxaline derivatives were synthesized and evaluated for their biological activities. The MTT assay indicated that most compounds possessed moderate to potent antiproliferation effects against MGC-803, HepG2, A549, HeLa, T-24 and WI-38 cell lines. 3-(Benzoxazol- -2-yl)-2-(N-3-dimethylaminopropyl)aminoquinoxaline (12a) exhibited the most potent cytotoxicity, with IC50 values ranging from 1.49 to 10.99 μM against the five tested cancer and one normal cell line. Agarose-gel electrophoresis assays suggested that 12a did not interact with intact DNA, but rather it strongly inhibited topoisomerase I (Topo I) via Topo I-mediated DNA unwinding to exert its anticancer activity. The molecular modeling study indicated that 12a adopt a unique mode to interact with DNA and Topo I. Detailed biological study of 12a in MGC-803 cells revealed that 12a could arrest the cell cycle in G2 phase, inducing the generation of reactive oxygen species (ROS), the fluctuation of intracellular Ca2+, and the loss of mitochondrial membrane potential (ΔΨm). Western Blot analysis indicated that 12a-treatment could significantly up-regulate the levels of pro-apoptosis proteins Bak, Bax, and Bim, down-regulate anti-apoptosis proteins Bcl-2 and Bcl-xl, and increase levels of cyclin B1 and CDKs inhibitor p21, cytochrome c, caspase-3, caspase-9 and their activated form in MGC-803 cells in a dose-dependent manner to induce cell apoptosis via a caspase-dependent intrinsic mitochondria-mediated pathway. Studies in MGC-803 xenograft tumors models demonstrated that 12a could significantly reduce tumor growth in vivo at doses as low as 6 mg/kg with low toxicity. Its convenient preparation and potent anticancer efficacy in vivo makes the 3-(benzazol-2-yl)quinoxaline scaffold a promising new chemistry entity for the development of novel chemotherapeutic agents.
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Affiliation(s)
- Qing-Qing Liu
- State Key Laboratory for Chemistry and Molecular Engineering of Medicinal Resources, Ministry of Science and Technology of China, School of Chemistry and Pharmaceutical Sciences, Guangxi Normal University, 15 Yu Cai Road, Guilin 541004, China
| | - Ke Lu
- State Key Laboratory for Chemistry and Molecular Engineering of Medicinal Resources, Ministry of Science and Technology of China, School of Chemistry and Pharmaceutical Sciences, Guangxi Normal University, 15 Yu Cai Road, Guilin 541004, China
| | - Hai-Miao Zhu
- State Key Laboratory for Chemistry and Molecular Engineering of Medicinal Resources, Ministry of Science and Technology of China, School of Chemistry and Pharmaceutical Sciences, Guangxi Normal University, 15 Yu Cai Road, Guilin 541004, China
| | - Shi-Lin Kong
- State Key Laboratory for Chemistry and Molecular Engineering of Medicinal Resources, Ministry of Science and Technology of China, School of Chemistry and Pharmaceutical Sciences, Guangxi Normal University, 15 Yu Cai Road, Guilin 541004, China
| | - Jing-Mei Yuan
- State Key Laboratory for Chemistry and Molecular Engineering of Medicinal Resources, Ministry of Science and Technology of China, School of Chemistry and Pharmaceutical Sciences, Guangxi Normal University, 15 Yu Cai Road, Guilin 541004, China
| | - Guo-Hai Zhang
- State Key Laboratory for Chemistry and Molecular Engineering of Medicinal Resources, Ministry of Science and Technology of China, School of Chemistry and Pharmaceutical Sciences, Guangxi Normal University, 15 Yu Cai Road, Guilin 541004, China
| | - Nan-Ying Chen
- State Key Laboratory for Chemistry and Molecular Engineering of Medicinal Resources, Ministry of Science and Technology of China, School of Chemistry and Pharmaceutical Sciences, Guangxi Normal University, 15 Yu Cai Road, Guilin 541004, China
| | - Chen-Xi Gu
- State Key Laboratory for Chemistry and Molecular Engineering of Medicinal Resources, Ministry of Science and Technology of China, School of Chemistry and Pharmaceutical Sciences, Guangxi Normal University, 15 Yu Cai Road, Guilin 541004, China
| | - Cheng-Xue Pan
- State Key Laboratory for Chemistry and Molecular Engineering of Medicinal Resources, Ministry of Science and Technology of China, School of Chemistry and Pharmaceutical Sciences, Guangxi Normal University, 15 Yu Cai Road, Guilin 541004, China.
| | - Dong-Liang Mo
- State Key Laboratory for Chemistry and Molecular Engineering of Medicinal Resources, Ministry of Science and Technology of China, School of Chemistry and Pharmaceutical Sciences, Guangxi Normal University, 15 Yu Cai Road, Guilin 541004, China.
| | - Gui-Fa Su
- State Key Laboratory for Chemistry and Molecular Engineering of Medicinal Resources, Ministry of Science and Technology of China, School of Chemistry and Pharmaceutical Sciences, Guangxi Normal University, 15 Yu Cai Road, Guilin 541004, China.
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56
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Abstract
The development of benzoxazole containing drugs and research compounds has been discussed in the present review along with its varied pharmacological activities such as antimicrobial, antiinflammatory, anticancer, antiviral, antiasthmatic, antitubercular, anticonvulsant, lipid modulating, anticoagulants, antidiabetic and anthelmintic activities. The present review is a compilation of the biological activities determined in the research work conducted on benzoxazole-based compounds fused and linked with various other heterocycles.
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Affiliation(s)
- Mayura Kale
- Government College of Pharmacy, Osmanpura, Aurangabad-431005, Maharashtra, India
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57
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Narita K, Fujisaki N, Sakuma Y, Katoh T. A novel approach to oxazole-containing diterpenoid synthesis from plant roots: salviamines E and F. Org Biomol Chem 2019; 17:655-663. [DOI: 10.1039/c8ob03030h] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Salviamines E and F were efficiently synthesized from a known molecule, 5,7,8-trimethoxy-1-naphthol.
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Affiliation(s)
- Koichi Narita
- Faculty of Pharmaceutical Sciences
- Tohoku Medical and Pharmaceutical University
- Sendai
- Japan
| | - Narumi Fujisaki
- Faculty of Pharmaceutical Sciences
- Tohoku Medical and Pharmaceutical University
- Sendai
- Japan
| | - Yuta Sakuma
- Faculty of Pharmaceutical Sciences
- Tohoku Medical and Pharmaceutical University
- Sendai
- Japan
| | - Tadashi Katoh
- Faculty of Pharmaceutical Sciences
- Tohoku Medical and Pharmaceutical University
- Sendai
- Japan
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58
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Sangi DP, Meira YG, Moreira NM, Lopes TA, Leite MP, Pereira-Flores ME, Alvarenga ES. Benzoxazoles as novel herbicidal agents. PEST MANAGEMENT SCIENCE 2019; 75:262-269. [PMID: 29885098 DOI: 10.1002/ps.5111] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/29/2018] [Revised: 05/22/2018] [Accepted: 06/04/2018] [Indexed: 06/08/2023]
Abstract
BACKGROUND Despite the need to develop new herbicides with different modes of action, due to weed resistance, many important classes of compounds have been studied poorly for this purpose. Benzoxazoles are considered privileged structures because of their biological activities, but their phytotoxic activities have not received a lot of attention until now. RESULTS Double vinylic substitution reactions were carried out to furnish four 2-nitromethylbenzoxazoles and one oxazolidine. Benzoxazol-2-ylmethanamine was obtained by reduction of compound 3a. These compounds were evaluated for their phytotoxicity in Allium cepa (onion), Solanum lycopersicum (tomato), Cucumis sativus (cucumber) and Sorghum bicolor (sorghum). Comparison with oxazolidine analogue allowed us to understand that the benzoxazolic structure is very important for the herbicidal activity. CONCLUSION All the synthesized compounds exhibited biological activity on seed germination. The four 2-nitromethylbenzoxazoles showed phytotoxic activity and the 5-chloro-2-(nitromethyl)benzo[d]oxazole (3b) exhibited higher inhibition than the commercial herbicide against all four plant species tested. © 2018 Society of Chemical Industry.
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Affiliation(s)
- Diego P Sangi
- Chemistry Department, Universidade Federal Fluminense, Volta Redonda, Brazil
| | - Yuri G Meira
- Chemistry Department, Universidade Federal Fluminense, Volta Redonda, Brazil
| | - Natália M Moreira
- Chemistry Department, Universidade Federal Fluminense, Volta Redonda, Brazil
| | - Thais A Lopes
- Chemistry Department, Universidade Federal Fluminense, Volta Redonda, Brazil
| | - Mathias P Leite
- Chemistry Department, Universidade Federal Fluminense, Volta Redonda, Brazil
| | - Milton E Pereira-Flores
- Department of Agricultural and Environmental Engineering, Universidade Federal de Viçosa, Brazil
| | - Elson S Alvarenga
- Chemistry Department, Universidade Federal de Viçosa, Viçosa, Brazil
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59
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Li Z, Dong J, Wang J, Yang DY, Weng Z. Elemental sulfur-promoted one-pot synthesis of 2-(2,2,2-trifluoroethyl)benzoxazoles and their derivatives. Chem Commun (Camb) 2019; 55:13132-13135. [DOI: 10.1039/c9cc06822h] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
An elemental sulfur promoted one-pot synthesis of 2-(2,2,2-trifluoroethyl)benzoxazole derivatives from the reaction of o-aminophenols, thiols, and anilines with 2-bromo-3,3,3-trifluoropropene is reported.
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Affiliation(s)
- Zhengyu Li
- State Key Laboratory of Photocatalysis on Energy and Environment, and Key Laboratory of Molecule Synthesis and Function Discovery
- College of Chemistry
- Fuzhou University
- Fuzhou
- China
| | - Jingnan Dong
- State Key Laboratory of Photocatalysis on Energy and Environment, and Key Laboratory of Molecule Synthesis and Function Discovery
- College of Chemistry
- Fuzhou University
- Fuzhou
- China
| | - Junwen Wang
- State Key Laboratory of Photocatalysis on Energy and Environment, and Key Laboratory of Molecule Synthesis and Function Discovery
- College of Chemistry
- Fuzhou University
- Fuzhou
- China
| | - Ding-Yah Yang
- Department of Chemistry
- Tunghai University
- Taichung City 40704
- Taiwan
| | - Zhiqiang Weng
- State Key Laboratory of Photocatalysis on Energy and Environment, and Key Laboratory of Molecule Synthesis and Function Discovery
- College of Chemistry
- Fuzhou University
- Fuzhou
- China
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60
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Glamočlija U, Padhye S, Špirtović-Halilović S, Osmanović A, Veljović E, Roca S, Novaković I, Mandić B, Turel I, Kljun J, Trifunović S, Kahrović E, Kraljević Pavelić S, Harej A, Klobučar M, Završnik D. Synthesis, Biological Evaluation and Docking Studies of Benzoxazoles Derived from Thymoquinone. Molecules 2018; 23:molecules23123297. [PMID: 30545123 PMCID: PMC6321291 DOI: 10.3390/molecules23123297] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2018] [Revised: 11/30/2018] [Accepted: 12/02/2018] [Indexed: 11/29/2022] Open
Abstract
Thymoquinone (TQ), a natural compound with antimicrobial and antitumor activity, was used as the starting molecule for the preparation of 3-aminothymoquinone (ATQ) from which ten novel benzoxazole derivatives were prepared and characterized by elemental analysis, IR spectroscopy, mass spectrometry and NMR (1H, 13C) spectroscopy in solution. The crystal structure of 4-methyl-2-phenyl-7-isopropyl-1,3-benzoxazole-5-ol (1a) has been determined by X-ray diffraction. All compounds were tested for their antibacterial, antifungal and antitumor activities. TQ and ATQ showed better antibacterial activity against tested Gram-positive and Gram-negative bacterial strains than benzoxazoles. ATQ had the most potent antifungal effect against Candida albicans, Saccharomyces cerevisiae and Aspergillus brasiliensis. Three benzoxazole derivatives and ATQ showed the highest antitumor activities. The most potent was 2-(4-fluorophenyl)-4-methyl-7-isopropyl-1,3-benzoxazole-5-ol (1f). Western blot analyses have shown that this compound inhibited phosphorylation of protein kinase B (Akt) and Insulin-like Growth Factor-1 Receptor (IGF1R β) in HeLa and HepG2 cells. The least toxic compound against normal fibroblast cells, which maintains similar antitumor activities as TQ, was 2-(4-chlorophenyl)-4-methyl-7-isopropyl-1,3-benzoxazole-5-ol (1e). Docking studies indicated that 1e and 1f have significant effects against selected receptors playing important roles in tumour survival.
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Affiliation(s)
- Una Glamočlija
- Scientific Research Department, Bosnalijek JSC, Jukićeva 53, 71000 Sarajevo, Bosnia and Herzegovina.
- School of Medicine, University of Mostar, Bijeli Brijeg bb, 88000 Mostar, Bosnia and Herzegovina.
- Faculty of Pharmacy, University of Sarajevo, Zmaja od Bosne 8, 71000 Sarajevo, Bosnia and Herzegovina.
| | - Subhash Padhye
- Interdisciplinary Science and Technology Research Academy, University of Pune, 2390-B, Hidayatullah Road, 411001 Pune, India.
| | - Selma Špirtović-Halilović
- Faculty of Pharmacy, University of Sarajevo, Zmaja od Bosne 8, 71000 Sarajevo, Bosnia and Herzegovina.
| | - Amar Osmanović
- Faculty of Pharmacy, University of Sarajevo, Zmaja od Bosne 8, 71000 Sarajevo, Bosnia and Herzegovina.
| | - Elma Veljović
- Faculty of Pharmacy, University of Sarajevo, Zmaja od Bosne 8, 71000 Sarajevo, Bosnia and Herzegovina.
| | - Sunčica Roca
- NMR Centre, Ruđer Bošković Institute, Bijenička cesta 54, 10000 Zagreb, Croatia.
| | - Irena Novaković
- ICTM, Center for Chemistry, University of Belgrade, Njegoševa 12, 11000 Belgrade, Serbia.
| | - Boris Mandić
- Faculty of Chemistry, University of Belgrade, Studentski trg 12-16, 11000 Belgrade, Serbia.
| | - Iztok Turel
- Faculty of Chemistry and Chemical Technology, University of Ljubljana, Večna pot 113, 1000 Ljubljana, Slovenia.
| | - Jakob Kljun
- Faculty of Chemistry and Chemical Technology, University of Ljubljana, Večna pot 113, 1000 Ljubljana, Slovenia.
| | - Snežana Trifunović
- Faculty of Chemistry, University of Belgrade, Studentski trg 12-16, 11000 Belgrade, Serbia.
| | - Emira Kahrović
- Department of Chemistry, Faculty of Science, University of Sarajevo, Zmaja od Bosne 35, 71000 Sarajevo, Bosnia and Herzegovina.
| | - Sandra Kraljević Pavelić
- Centre for High-throughput Technologies, Department of Biotechnology, University of Rijeka, Radmile Matejčić 2, 51000 Rijeka, Croatia.
| | - Anja Harej
- Centre for High-throughput Technologies, Department of Biotechnology, University of Rijeka, Radmile Matejčić 2, 51000 Rijeka, Croatia.
| | - Marko Klobučar
- Centre for High-throughput Technologies, Department of Biotechnology, University of Rijeka, Radmile Matejčić 2, 51000 Rijeka, Croatia.
| | - Davorka Završnik
- Faculty of Pharmacy, University of Sarajevo, Zmaja od Bosne 8, 71000 Sarajevo, Bosnia and Herzegovina.
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61
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Zhang SS, Wang DC, Xie MS, Qu GR, Guo HM. Highly Chemo- and Diastereoselective Dearomative [3 + 2] Cycloaddition Reactions of Benzazoles with Donor–Acceptor Oxiranes. Org Lett 2018; 20:8026-8029. [DOI: 10.1021/acs.orglett.8b03615] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Affiliation(s)
- Shan-Shan Zhang
- Henan Key Laboratory of Organic Functional Molecules and Drugs Innovation, Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan 453007, China
| | - Dong-Chao Wang
- Henan Key Laboratory of Organic Functional Molecules and Drugs Innovation, Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan 453007, China
| | - Ming-Sheng Xie
- Henan Key Laboratory of Organic Functional Molecules and Drugs Innovation, Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan 453007, China
| | - Gui-Rong Qu
- Henan Key Laboratory of Organic Functional Molecules and Drugs Innovation, Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan 453007, China
| | - Hai-Ming Guo
- Henan Key Laboratory of Organic Functional Molecules and Drugs Innovation, Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan 453007, China
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62
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Zhang SB, Liu X, Gao MY, Dong ZB. One-Pot Synthesis of 2-Benzyl/2-Allyl-Substituted Thiobenzoazoles Using Transition-Metal-Free Conditions in Water. J Org Chem 2018; 83:14933-14941. [PMID: 30474368 DOI: 10.1021/acs.joc.8b02136] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A transition-metal-free protocol for the one-pot synthesis of 2-benzyl/2-allyl-substituted thiobenzoazoles in water was developed. The cyclization of 2-aminothiophenols, 2-aminophenols, and 1,2-phenylenediamines with tetramethylthiuram disulfide (TMTD) gave mercapto benzoheterocycles, and the subsequent C-S coupling with benzyl or allyl halides furnished the desired products in good to excellent yields. This method features transition-metal-free conditions with water as a solvent, an easy performance, mild reaction conditions, a wide substrate scope, and good to excellent yields, thus paving an efficient and useful way to establish a library of potentially active drug molecules.
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Affiliation(s)
- Shi-Bo Zhang
- School of Chemistry and Environmental Engineering , Wuhan Institute of Technology , Wuhan 430205 , China
| | - Xing Liu
- School of Chemistry and Environmental Engineering , Wuhan Institute of Technology , Wuhan 430205 , China
| | - Ming-Yuan Gao
- School of Chemistry and Environmental Engineering , Wuhan Institute of Technology , Wuhan 430205 , China
| | - Zhi-Bing Dong
- School of Chemistry and Environmental Engineering , Wuhan Institute of Technology , Wuhan 430205 , China.,Department of Chemistry , Ludwig-Maximilians-Universität , Butenandtstrasse 5-13 , München 81377 , Germany
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63
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Patra A, James A, Das TK, Biju AT. Oxidative NHC Catalysis for the Generation of Imidoyl Azoliums: Synthesis of Benzoxazoles. J Org Chem 2018; 83:14820-14826. [DOI: 10.1021/acs.joc.8b02598] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Atanu Patra
- Organic Chemistry Division, CSIR-National Chemical Laboratory (CSIR-NCL), Dr. Homi Bhabha Road, Pune 411008, India
| | - Anjima James
- Organic Chemistry Division, CSIR-National Chemical Laboratory (CSIR-NCL), Dr. Homi Bhabha Road, Pune 411008, India
| | - Tamal Kanti Das
- Organic Chemistry Division, CSIR-National Chemical Laboratory (CSIR-NCL), Dr. Homi Bhabha Road, Pune 411008, India
| | - Akkattu T. Biju
- Department of Organic Chemistry, Indian Institute of Science, Bangalore 560012, India
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64
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Kaur R, Palta K, Kumar M, Bhargava M, Dahiya L. Therapeutic potential of oxazole scaffold: a patent review (2006–2017). Expert Opin Ther Pat 2018; 28:783-812. [DOI: 10.1080/13543776.2018.1526280] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Affiliation(s)
- Ramandeep Kaur
- University Institute of Pharmaceutical Sciences, Panjab University, Chandigarh, India
| | - Kezia Palta
- University Institute of Pharmaceutical Sciences, Panjab University, Chandigarh, India
| | - Manoj Kumar
- University Institute of Pharmaceutical Sciences, Panjab University, Chandigarh, India
| | - Meha Bhargava
- Department of Chemistry, Panjab University, Chandigarh, India
| | - Lalita Dahiya
- University Institute of Pharmaceutical Sciences, Panjab University, Chandigarh, India
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Bisballe N, Hedidi M, Demmer CS, Chevallier F, Roisnel T, Dorcet V, Halauko YS, Ivashkevich OA, Matulis VE, Bentabed-Ababsa G, Bunch L, Mongin F. Functionalization of Oxazolo[4,5- b
]pyrazines by Deprotometallation. European J Org Chem 2018. [DOI: 10.1002/ejoc.201800481] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Niels Bisballe
- Univ Rennes, CNRS; ISCR (Institut des Sciences Chimiques de Rennes) - UMR 6226; 35000 Rennes France
- Department of Drug Design and Pharmacology; Faculty of Health and Medical Sciences; University of Copenhagen; Universitetsparken 2 2100 Copenhagen Denmark
| | - Madani Hedidi
- Univ Rennes, CNRS; ISCR (Institut des Sciences Chimiques de Rennes) - UMR 6226; 35000 Rennes France
- Laboratoire de Synthèse Organique Appliquée; Faculté des Sciences Exactes et Appliquées; Université d'Oran; 1 Ahmed Ben Bella 31000 Oran Algeria
| | - Charles S. Demmer
- Department of Drug Design and Pharmacology; Faculty of Health and Medical Sciences; University of Copenhagen; Universitetsparken 2 2100 Copenhagen Denmark
| | - Floris Chevallier
- Univ Rennes, CNRS; ISCR (Institut des Sciences Chimiques de Rennes) - UMR 6226; 35000 Rennes France
| | - Thierry Roisnel
- Univ Rennes, CNRS; ISCR (Institut des Sciences Chimiques de Rennes) - UMR 6226; 35000 Rennes France
| | - Vincent Dorcet
- Univ Rennes, CNRS; ISCR (Institut des Sciences Chimiques de Rennes) - UMR 6226; 35000 Rennes France
| | - Yury S. Halauko
- UNESCO Chair of Belarusian State University; 14 Leningradskaya Str. 220030 Minsk Belarus
| | - Oleg A. Ivashkevich
- UNESCO Chair of Belarusian State University; 14 Leningradskaya Str. 220030 Minsk Belarus
| | - Vadim E. Matulis
- Research Institute for Physico-Chemical Problems of Belarusian State University; 14 Leningradskaya Str. 220030 Minsk Belarus
| | - Ghenia Bentabed-Ababsa
- Laboratoire de Synthèse Organique Appliquée; Faculté des Sciences Exactes et Appliquées; Université d'Oran; 1 Ahmed Ben Bella 31000 Oran Algeria
| | - Lennart Bunch
- Department of Drug Design and Pharmacology; Faculty of Health and Medical Sciences; University of Copenhagen; Universitetsparken 2 2100 Copenhagen Denmark
| | - Florence Mongin
- Univ Rennes, CNRS; ISCR (Institut des Sciences Chimiques de Rennes) - UMR 6226; 35000 Rennes France
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66
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Watanabe G, Sekiya H, Tamai E, Saijo R, Uno H, Mori S, Tanaka T, Maki J, Kawase M. Synthesis and Antimicrobial Activity of 2-Trifluoroacetonylbenzoxazole Ligands and Their Metal Complexes. Chem Pharm Bull (Tokyo) 2018; 66:732-740. [PMID: 29962457 DOI: 10.1248/cpb.c18-00158] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Three 2-fluoroacetonylbenzoxazole ligands 1a-c and their new Zn(II) complexes 2a-c have been synthesized. In addition, syntheses of new metal [Mg(II), Ni(II), Cu(II), Pd(II), and Ag(I)] complexes from 1a have been also described. The molecular and crystal structures of six metal complexes 2b and 2d-h were determined by single-crystal X-ray diffraction analyses. Their antibacterial activities against six Gram-positive and six Gram-negative bacteria were evaluated by minimum inhibitory concentrations (MIC), which were compared with those of appropriate antibiotics and silver nitrate. The results indicate that some metal compounds have more antibacterial effects in comparison with free ligands and have preferred antibacterial activities that may have potential pharmaceutical applications. Noticeably, the Ag(I) complex 2h exhibited low MIC value of 0.7 µM against Pseudomonas aeruginosa, which was even superior to the reference drug, Norfloxacin with that of 1.5 µM. Against P. aeruginosa, 2h is bacteriostatic, exerts the cell surface damage observed by scanning electron microscopy (SEM) and is less likely to develop resistance. The new 2h has been found to display effective antimicrobial activity against a series of bacteria.
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Affiliation(s)
- Genki Watanabe
- Faculty of Pharmaceutical Sciences, Matsuyama University
| | - Hiroshi Sekiya
- Department of Infectious Diseases, College of Pharmaceutical Sciences, Matsuyama University
| | - Eiji Tamai
- Department of Infectious Diseases, College of Pharmaceutical Sciences, Matsuyama University
| | - Ryosuke Saijo
- Faculty of Pharmaceutical Sciences, Matsuyama University
| | - Hidemitsu Uno
- Department of Chemistry and Biology, Graduate School of Science and Engineering, Ehime University
| | - Shigeki Mori
- Advanced Research Support Center, Ehime University
| | - Toru Tanaka
- Faculty of Pharmacy and Pharmaceutical Sciences, Josai University
| | - Jun Maki
- Department of Infectious Diseases, College of Pharmaceutical Sciences, Matsuyama University
| | - Masami Kawase
- Faculty of Pharmaceutical Sciences, Matsuyama University
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67
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CuNiFe a Magnetic Nano‐Catalyst: an Efficient Catalyst for the Selective Synthesis of Benzoxazoles. ChemistrySelect 2018. [DOI: 10.1002/slct.201801462] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
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68
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Sun Y, Zhang J, Zhang Y, Liu J, van der Veen S, Duttwyler S. The closo-Dodecaborate Dianion Fused with Oxazoles Provides 3D Diboraheterocycles with Selective Antimicrobial Activity. Chemistry 2018; 24:10364-10371. [PMID: 29738073 DOI: 10.1002/chem.201801602] [Citation(s) in RCA: 42] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2018] [Revised: 05/05/2018] [Indexed: 11/11/2022]
Abstract
The synthesis and application of icosahedral boron cluster compounds has been studied extensively since their discovery several decades ago; however, two aspects of their chemistry have received little attention: The possibility to form inorganic/organic fused boraheterocycles and their potential to act as antimicrobial agents. This work comprises the preparation of a class of 3D diborabenzoxazole analogues with the closo-dodecaborate in place of the benzene moiety. The presented synthetic procedures provide access to a wide range of diboraheterocycles under mild conditions. These 3D heterocycles exhibit strong and selective antimicrobial activity against Neisseria gonorrhoeae, a widespread bacterial pathogen that has shown increasing incidences of multidrug resistance and for which the development of new antimicrobial compounds is urgently needed.
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Affiliation(s)
- Yuji Sun
- Department of Chemistry, Zhejiang University, Hangzhou, P.R. China
| | - Jianglin Zhang
- Department of Medical Microbiology and Parasitology, School of Medicine, Zhejiang University, Hangzhou, P.R. China
| | - Yuanbin Zhang
- Department of Chemistry, Zhejiang University, Hangzhou, P.R. China
| | - Jiyong Liu
- Department of Chemistry, Zhejiang University, Hangzhou, P.R. China
| | - Stijn van der Veen
- Department of Microbiology and Parasitology, Collaborative Innovation Center for Diagnosis, and Treatment of Infectious Diseases, School of Medicine, Zhejiang University, Hangzhou, P.R. China
| | - Simon Duttwyler
- Department of Chemistry, Zhejiang University, Hangzhou, P.R. China
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69
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Affiliation(s)
- Veronika Šlachtová
- Department of Organic Chemistry; Faculty of Science; 17. listopadu 12 Olomouc Czech Republic 77146
| | - Lucie Brulíková
- Department of Medicinal Chemistry; Institute of Molecular and Translational Medicine; Hněvotínská 5 Olomouc Czech Republic 77900
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70
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Murata Y, Matsumoto N, Miyata M, Kitamura Y, Kakusawa N, Matsumura M, Yasuike S. One-pot reaction for the synthesis of N -substituted 2-aminobenzoxazoles using triphenylbismuth dichloride as cyclodesulfurization reagent. J Organomet Chem 2018. [DOI: 10.1016/j.jorganchem.2018.01.041] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
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71
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Moghaddam FM, Saberi V, Kalhor S, Veisi N. Palladium(II) Immobilized Onto the Glucose Functionalized Magnetic Nanoparticle as a New and Efficient Catalyst for the One-pot Synthesis of Benzoxazoles. Appl Organomet Chem 2018. [DOI: 10.1002/aoc.4240] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Firouz Matloubi Moghaddam
- Laboratory of Organic Synthesis and Natural Products, Department of Chemistry; Sharif University of Technology; Tehran Iran
| | - Vahid Saberi
- Laboratory of Organic Synthesis and Natural Products, Department of Chemistry; Sharif University of Technology; Tehran Iran
| | - Sepideh Kalhor
- Laboratory of Organic Synthesis and Natural Products, Department of Chemistry; Sharif University of Technology; Tehran Iran
| | - Nazila Veisi
- Laboratory of Organic Synthesis and Natural Products, Department of Chemistry; Sharif University of Technology; Tehran Iran
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72
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Tran PH, Thi Hang AH. Deep eutectic solvent-catalyzed arylation of benzoxazoles with aromatic aldehydes. RSC Adv 2018; 8:11127-11133. [PMID: 35541556 PMCID: PMC9078944 DOI: 10.1039/c8ra01094c] [Citation(s) in RCA: 37] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2018] [Accepted: 03/13/2018] [Indexed: 12/27/2022] Open
Abstract
A green and efficient synthesis of 2-arylbenzoxazoles using deep eutectic solvent as a homogeneous catalyst has been developed for the first time.
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Affiliation(s)
- Phuong Hoang Tran
- Department of Organic Chemistry
- Faculty of Chemistry
- University of Science
- Viet Nam National University
- Ho Chi Minh City 721337
| | - Anh-Hung Thi Hang
- Department of Organic Chemistry
- Faculty of Chemistry
- University of Science
- Viet Nam National University
- Ho Chi Minh City 721337
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73
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Recent advance in oxazole-based medicinal chemistry. Eur J Med Chem 2018; 144:444-492. [DOI: 10.1016/j.ejmech.2017.12.044] [Citation(s) in RCA: 166] [Impact Index Per Article: 27.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2017] [Revised: 12/04/2017] [Accepted: 12/13/2017] [Indexed: 01/09/2023]
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74
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Ballari MS, Herrera Cano N, Lopez AG, Wunderlin DA, Feresín GE, Santiago AN. Green Synthesis of Potential Antifungal Agents: 2-Benzyl Substituted Thiobenzoazoles. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2017; 65:10325-10331. [PMID: 29099589 DOI: 10.1021/acs.jafc.7b04130] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
A series of benzyl-substituted thiobenzoazoles were synthesized by an environmentally friendly approach, to search for new antifungal agrochemicals. Compounds were prepared starting from 2-mercaptobenzoazoles, using KOH, benzyl halides, and water, resulting in a simple and ecological method. New antifungals were tested against a group of phytopathogenic fungi. Two compounds showed an interesting activity against Botrytis cinerea, Fusarium oxysporum, and Aspergillus spp.: 2-((4-(trifluoromethyl)benzyl)thio)benzo[d]thiazole, 3ac, and 2-((4-methylbenzyl)thio)benzo[d]thiazole, 3al. Thus, 3ac and 3al can be considered as broad spectrum antifungal agents. Furthermore, two new compounds, 2-((4-iodobenzyl)thio)benzo[d]thiazole, 3aj, and 2-(benzylthio)benzo[d]oxazole, 3ba, showed better inhibitory effect against Botrytis cinerea and Fusarium oxysporum when compared to the commercial fungicide Captan. Thus, 3aj and 3ba can be considered reduced-spectrum antifungals.
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Affiliation(s)
- María Sol Ballari
- INFIQC, Departamento de Química Orgánica, Facultad de Ciencias Químicas, CONICET, Universidad Nacional de Córdoba, Ciudad Universitaria , 5000 Córdoba, Argentina
| | - Natividad Herrera Cano
- Instituto de Biotecnología, Facultad de Ingeniería, Universidad Nacional de San Juan, CONICET , Av. Libertador General San Martín 1109 (O), 5400 San Juan, Argentina
| | - Abel Gerardo Lopez
- ICTA, Facultad de Ciencias Exactas, Físicas y Naturales, Universidad Nacional de Córdoba, Ciudad Universitaria , 5000 Córdoba, Argentina
| | - Daniel Alberto Wunderlin
- ICYTAC, CONICET and Departamento de Química Orgánica, Facultad de Ciencias Químicas, Universidad Nacional de Córdoba, Ciudad Universitaria , 5000 Córdoba, Argentina
| | - Gabriela Egly Feresín
- Instituto de Biotecnología, Facultad de Ingeniería, Universidad Nacional de San Juan, CONICET , Av. Libertador General San Martín 1109 (O), 5400 San Juan, Argentina
| | - Ana Noemí Santiago
- INFIQC, Departamento de Química Orgánica, Facultad de Ciencias Químicas, CONICET, Universidad Nacional de Córdoba, Ciudad Universitaria , 5000 Córdoba, Argentina
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75
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ROS generation and JNK activation contribute to 4-methoxy-TEMPO-induced cytotoxicity, autophagy, and DNA damage in HepG2 cells. Arch Toxicol 2017; 92:717-728. [PMID: 28993908 DOI: 10.1007/s00204-017-2084-9] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2017] [Accepted: 09/26/2017] [Indexed: 01/01/2023]
Abstract
4-Methoxy-TEMPO, a derivative of 2,2,6,6-tetramethylpiperidine-1-oxyl (TEMPO), is a stable nitroxide radical and is generally used in organic and pharmaceutical syntheses for the oxidation of alcohols. Previously, we reported the involvement of reactive oxygen species (ROS) and c-Jun N-terminal kinases (JNK) in TEMPO-induced apoptosis in mouse L5178Y cells. In this study, we investigated 4-methoxy-TEMPO induced toxicity in human HepG2 hepatoma cells and its underlying mechanisms. Treatments with 4-methoxy-TEMPO (0.5-5 mM for 2-6 h) caused oxidative stress as demonstrated by increased intensity of the ROS indicator H2DCF-DA, decreased levels of glutathione. 4-Methoxy-TEMPO treatment also induced DNA damage as characterized by increased levels of DNA tail intensity in the Comet assay, increased phosphorylation of related proteins including γ-H2A.X, p-Chk1, and p-Chk2, and activation of MAPK signaling pathways. In addition, 4-methoxy-TEMPO also induced autophagy as demonstrated by the conversion of LC3B-I to II, decreased level of p62, and the appearance of GFP-LC3B punctae. To investigate the crosstalk between different signaling pathways, pretreatment of HepG2 with N-acetylcysteine, an ROS scavenger, attenuated 4-methoxy-TEMPO-induced DNA damage, suppressed JNK activation, and diminished autophagy induction. Furthermore, inhibiting JNK activation by a JNK-specific inhibitor, SP600125, decreased DNA damage levels induced by 4-methoxy-TEMPO. These results suggest that multiple mechanisms including ROS generation, DNA damage, and MAPK activation contribute to 4-methoxy-TEMPO-induced toxicity.
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Koleda O, Broese T, Noetzel J, Roemelt M, Suna E, Francke R. Synthesis of Benzoxazoles Using Electrochemically Generated Hypervalent Iodine. J Org Chem 2017; 82:11669-11681. [DOI: 10.1021/acs.joc.7b01686] [Citation(s) in RCA: 56] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Affiliation(s)
- Olesja Koleda
- Latvian Institute of Organic Synthesis, Aizkraukles 21, LV-1006 Riga, Latvia
| | - Timo Broese
- Institute
of Chemistry, Rostock University, Albert-Einstein-Str. 3a, 18059 Rostock, Germany
| | - Jan Noetzel
- Lehrstuhl
für Theoretische Chemie, Ruhr-University Bochum, 44780 Bochum, Germany
| | - Michael Roemelt
- Lehrstuhl
für Theoretische Chemie, Ruhr-University Bochum, 44780 Bochum, Germany
- Max-Planck Institut für Kohlenforschung, Kaiser-Wilhelm Platz 1, 45470 Mülheim an der Ruhr, Germany
| | - Edgars Suna
- Latvian Institute of Organic Synthesis, Aizkraukles 21, LV-1006 Riga, Latvia
| | - Robert Francke
- Institute
of Chemistry, Rostock University, Albert-Einstein-Str. 3a, 18059 Rostock, Germany
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78
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Margrey KA, McManus JB, Bonazzi S, Zecri F, Nicewicz DA. Predictive Model for Site-Selective Aryl and Heteroaryl C-H Functionalization via Organic Photoredox Catalysis. J Am Chem Soc 2017; 139:11288-11299. [PMID: 28718642 DOI: 10.1021/jacs.7b06715] [Citation(s) in RCA: 103] [Impact Index Per Article: 14.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Direct C-H functionalization of aromatic compounds is a useful synthetic strategy that has garnered much attention because of its application to pharmaceuticals, agrochemicals, and late-stage functionalization reactions on complex molecules. On the basis of previous methods disclosed by our lab, we sought to develop a predictive model for site selectivity and extend this aryl functionalization chemistry to a selected set of heteroaromatic systems commonly used in the pharmaceutical industry. Using electron density calculations, we were able to predict the site selectivity of direct C-H functionalization in a number of heterocycles and identify general trends observed across heterocycle classes.
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Affiliation(s)
- Kaila A Margrey
- Department of Chemistry, University of North Carolina at Chapel Hill , Chapel Hill, North Carolina 27599-3290, United States
| | - Joshua B McManus
- Department of Chemistry, University of North Carolina at Chapel Hill , Chapel Hill, North Carolina 27599-3290, United States
| | - Simone Bonazzi
- Novartis Institutes for Biomedical Research , Global Discovery Chemistry, 181 Massachusetts Avenue, Cambridge, Massachusetts 02139, United States
| | - Frederic Zecri
- Novartis Institutes for Biomedical Research , Global Discovery Chemistry, 181 Massachusetts Avenue, Cambridge, Massachusetts 02139, United States
| | - David A Nicewicz
- Department of Chemistry, University of North Carolina at Chapel Hill , Chapel Hill, North Carolina 27599-3290, United States
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79
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Losada AA, Méndez C, Salas JA, Olano C. Exploring the biocombinatorial potential of benzoxazoles: generation of novel caboxamycin derivatives. Microb Cell Fact 2017; 16:93. [PMID: 28545544 PMCID: PMC5445379 DOI: 10.1186/s12934-017-0709-6] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2017] [Accepted: 05/23/2017] [Indexed: 11/10/2022] Open
Abstract
Background The biosynthesis pathway of benzoxazole compounds caboxamycin and nataxazole have been recently elucidated. Both compounds share one of their precursors, 3-hydroxyanthranilate (two units in the case of nataxazole). In addition, caboxamycin structure includes a salicylate moiety while 6-methylsalycilate is the third scaffold in nataxazole. Pathways cross-talk has been identified in caboxamycin producer Streptomyces sp. NTK937, between caboxamycin and enterobactin pathways, and nataxazole producer Streptomyces sp. Tü6176, between nataxazole and coelibactin pathways. These events represent a natural form of combinatorial biosynthesis. Results Eleven novel caboxamycin derivatives, and five putative novel derivatives, bearing distinct substitutions in the aryl ring have been generated. These compounds were produced by heterologous expression of several caboxamycin biosynthesis genes in Streptomyces albus J1074 (two compounds), by combinatorial biosynthesis in Streptomyces sp. NTK937 expressing nataxazole iterative polyketide synthase (two compounds) and by mutasynthesis using a nonproducing mutant of Streptomyces sp. NTK937 (12 compounds). Some of the compounds showed improved bioactive properties in comparison with caboxamycin. Conclusions In addition to the benzoxazoles naturally biosynthesized by the caboxamycin and nataxazole producers, a greater structural diversity can be generated by mutasynthesis and heterologous expression of benzoxazole biosynthesis genes, not only in the respective producer strains but also in non-benzoxazole producers such as S. albus strains. These results show that the production of a wide variety of benzoxazoles could be potentially achieved by the sole expression of cbxBCDE genes (or orthologs thereof), supplying an external source of salicylate-like compounds, or with the concomitant expression of other genes capable of synthesizing salicylates, such as cbxA or natPK. Electronic supplementary material The online version of this article (doi:10.1186/s12934-017-0709-6) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Armando A Losada
- Departamento de Biología Funcional e Instituto Universitario de Oncología del Principado de Asturias (I.U.O.P.A), Universidad de Oviedo, C/Julian Claveria s/n, 33006, Oviedo, Asturias, Spain
| | - Carmen Méndez
- Departamento de Biología Funcional e Instituto Universitario de Oncología del Principado de Asturias (I.U.O.P.A), Universidad de Oviedo, C/Julian Claveria s/n, 33006, Oviedo, Asturias, Spain
| | - José A Salas
- Departamento de Biología Funcional e Instituto Universitario de Oncología del Principado de Asturias (I.U.O.P.A), Universidad de Oviedo, C/Julian Claveria s/n, 33006, Oviedo, Asturias, Spain
| | - Carlos Olano
- Departamento de Biología Funcional e Instituto Universitario de Oncología del Principado de Asturias (I.U.O.P.A), Universidad de Oviedo, C/Julian Claveria s/n, 33006, Oviedo, Asturias, Spain.
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Tantray MA, Khan I, Hamid H, Alam MS, Dhulap A, Ganai AA. Oxazolo[4,5-b]pyridine-Based Piperazinamides as GSK-3β Inhibitors with Potential for Attenuating Inflammation and Suppression of Pro-Inflammatory Mediators. Arch Pharm (Weinheim) 2017; 350. [PMID: 28543747 DOI: 10.1002/ardp.201700022] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2017] [Revised: 04/28/2017] [Accepted: 05/02/2017] [Indexed: 12/12/2022]
Abstract
Recent studies reveal that glycogen synthase kinase-3β (GSK-3β) acts as a pro-inflammatory enzyme, and by inhibiting this kinase, inflammation can be controlled. In this regard, a series of 17 piperazine-linked oxazolo[4,5-b]pyridine-based derivatives was synthesized and evaluated for in vitro GSK-3β inhibitory and in vivo anti-inflammatory activity. The compounds 7d, 7e, 7g, and 7c displayed the best GSK-3β inhibitory activity among all the synthesized compounds, with corresponding IC50 values of 0.34, 0.39, 0.47, and 0.53 µM. Among the compounds 7d, 7e, 7g, and 7c examined for in vivo anti-inflammatory activity in the rat paw edema model, compound 7d exhibited maximum inhibition, reducing the paw volume by 62.79 and 65.91% at 3 and 5 h post-carrageenan administration, respectively, in comparison to indomethacin (76.74% at 3 h and 79.54% at 5 h after carrageenan administration). Furthermore, these compounds (7d, 7e, 7g, and 7c) were also found to substantially inhibit pro-inflammatory mediators, i.e., TNF-α, IL-1β, and IL-6, ex vivo in comparison to indomethacin and did not pose any gastric ulceration risk, indicating the potential of this oxazolopyridine scaffold for the development of GSK-3β inhibitors and their application as anti-inflammatory agents.
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Affiliation(s)
- Mushtaq A Tantray
- Faculty of Science, Department of Chemistry, Jamia Hamdard (Hamdard University), New Delhi, India
| | - Imran Khan
- Faculty of Science, Department of Chemistry, Jamia Hamdard (Hamdard University), New Delhi, India
| | - Hinna Hamid
- Faculty of Science, Department of Chemistry, Jamia Hamdard (Hamdard University), New Delhi, India
| | - Mohammad Sarwar Alam
- Faculty of Science, Department of Chemistry, Jamia Hamdard (Hamdard University), New Delhi, India
| | - Abhijeet Dhulap
- CSIR - Unit for Research and Development of Information Products (URDIP), Pune, India
| | - Ajaz Ahmad Ganai
- Molecular Virology Lab., Department of Biotechnology, Jamia Millia Islamia, New Delhi, India
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81
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Yu C, Guo X, Xi Z, Muzzio M, Yin Z, Shen B, Li J, Seto CT, Sun S. AgPd Nanoparticles Deposited on WO 2.72 Nanorods as an Efficient Catalyst for One-Pot Conversion of Nitrophenol/Nitroacetophenone into Benzoxazole/Quinazoline. J Am Chem Soc 2017; 139:5712-5715. [PMID: 28402632 DOI: 10.1021/jacs.7b01983] [Citation(s) in RCA: 43] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
We report a seed-mediated growth of 2.3 nm AgPd nanoparticles (NPs) in the presence of 40 × 5 nm WO2.72 nanorods (NRs) for the synthesis of AgPd/WO2.72 composites. The strong interactions between AgPd NPs and WO2.72 NRs make the composites, especially the Ag48Pd52/WO2.72, catalytically active for dehydrogenation of formic acid (TOF = 1718 h-1 and Ea = 31 kJ/mol) and one-pot reactions of formic acid, 2-nitrophenol, and aldehydes into benzoxazoles in near quantitative yields under mild conditions. The catalysis can also be extended to the one-pot reactions of ammonium formate, 2-nitroacetophenone, and aldehyde for high yield syntheses of quinazolines. Our studies demonstrate a new catalyst design to achieve a green chemistry approach to one-pot reactions for the syntheses of benzoxazoles and quinazolines.
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Affiliation(s)
- Chao Yu
- Department of Chemistry, Brown University , Providence, Rhode Island 02912, United States
| | - Xuefeng Guo
- Department of Chemistry, Brown University , Providence, Rhode Island 02912, United States
| | - Zheng Xi
- Department of Chemistry, Brown University , Providence, Rhode Island 02912, United States
| | - Michelle Muzzio
- Department of Chemistry, Brown University , Providence, Rhode Island 02912, United States
| | - Zhouyang Yin
- Department of Chemistry, Brown University , Providence, Rhode Island 02912, United States
| | - Bo Shen
- Department of Chemistry, Brown University , Providence, Rhode Island 02912, United States
| | - Junrui Li
- Department of Chemistry, Brown University , Providence, Rhode Island 02912, United States
| | - Christopher T Seto
- Department of Chemistry, Brown University , Providence, Rhode Island 02912, United States
| | - Shouheng Sun
- Department of Chemistry, Brown University , Providence, Rhode Island 02912, United States
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82
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Copper-catalyzed Direct 2-Arylation of Benzoxazoles and Benzoimidazoles with Aryl Bromides and Cytotoxicity of Products. Sci Rep 2017; 7:43758. [PMID: 28256577 PMCID: PMC5335610 DOI: 10.1038/srep43758] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2016] [Accepted: 01/26/2017] [Indexed: 01/25/2023] Open
Abstract
An efficient copper-catalyzed direct 2-arylation of benzoxazoles and benzoimidazoles with aryl bromides is presented. The CuI/PPh3-based catalyst promotes the installation of various aryl and heteroaryl groups through a C-H activation process in good to excellent yields. The cytotoxicity of obtained 2-aryl benzoxazoles (benzoimidazoles) was also evaluated and 1-methyl-2-(naphthalen-1-yl)benzoimidazole showed potential cytotoxicity.
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83
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Damião MCFCB, Galaverna R, Kozikowski AP, Eubanks J, Pastre JC. Telescoped continuous flow generation of a library of highly substituted 3-thio-1,2,4-triazoles. REACT CHEM ENG 2017. [DOI: 10.1039/c7re00125h] [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
An integrated continuous flow process for the synthesis of 3-thio-1,2,4-triazoles is reported. A small library of 18 compounds was prepared in just 48 minutes of residence time in moderate to excellent yields.
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Affiliation(s)
| | - Renan Galaverna
- Institute of Chemistry
- University of Campinas - UNICAMP
- Campinas
- Brazil
| | | | - James Eubanks
- Division of Genetics and Development
- Krembil Research Institute
- Toronto
- Canada
| | - Julio C. Pastre
- Institute of Chemistry
- University of Campinas - UNICAMP
- Campinas
- Brazil
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84
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Carayon C, Fery-Forgues S. 2-Phenylbenzoxazole derivatives: a family of robust emitters of solid-state fluorescence. Photochem Photobiol Sci 2017; 16:1020-1035. [DOI: 10.1039/c7pp00112f] [Citation(s) in RCA: 43] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In addition to thermal, chemical and photochemical stability, the 2-phenylbenzoxazole fragment exhibits attractive emission properties in the solid state, thus leading to highly photoluminescent materials and sensors.
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Affiliation(s)
- Chantal Carayon
- SPCMIB
- UMR5068
- CNRS-Université de Toulouse III Paul Sabatier
- Toulouse
- France
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85
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Wang G, Peng Z, Wang J, Li J, Li X. Synthesis, biological evaluation and molecular docking study of N -arylbenzo[ d ]oxazol-2-amines as potential α-glucosidase inhibitors. Bioorg Med Chem 2016; 24:5374-5379. [DOI: 10.1016/j.bmc.2016.08.061] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2016] [Revised: 08/17/2016] [Accepted: 08/29/2016] [Indexed: 12/01/2022]
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86
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Cao X, Chen Y, Zhang Y, Qiu Y, Yu M, Xu X, Liu X, Liu BF, Zhang G. Synthesis and biological evaluation of new 6-hydroxypyridazinone benzisoxazoles: Potential multi-receptor-targeting atypical antipsychotics. Eur J Med Chem 2016; 124:713-728. [DOI: 10.1016/j.ejmech.2016.09.008] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2016] [Revised: 09/02/2016] [Accepted: 09/03/2016] [Indexed: 12/17/2022]
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87
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Robinson ERT, Walden DM, Fallan C, Greenhalgh MD, Cheong PHY, Smith AD. Non-bonding 1,5-S···O interactions govern chemo- and enantioselectivity in isothiourea-catalyzed annulations of benzazoles. Chem Sci 2016; 7:6919-6927. [PMID: 28567263 PMCID: PMC5450589 DOI: 10.1039/c6sc00940a] [Citation(s) in RCA: 115] [Impact Index Per Article: 14.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/29/2016] [Accepted: 07/02/2016] [Indexed: 12/22/2022] Open
Abstract
Isothiourea-catalyzed annulations between 2-acyl benzazoles and α,β-unsaturated acyl ammonium intermediates are selectively tuned to form either lactam or lactone heterocycles in good yields (up to 95%) and high ee (up to 99%) using benzothiazole or benzoxazole derivatives, respectively. Computation gives insight into the significant role of two 1,5-S···O interactions in controlling the structural preorganization and chemoselectivity observed within the lactam synthesis with benzothiazoles as nucleophiles. When using benzazoles the absence of a second stabilizing non-bonding 1,5-S···O interaction leads to a dominant C-H···O interaction in determining structural preorganization and lactone formation.
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Affiliation(s)
- Emily R T Robinson
- EaStCHEM , School of Chemistry , University of St Andrews , North Haugh , St Andrews KY16 9ST , UK .
| | - Daniel M Walden
- Department of Chemistry , Oregon State University , 135 Gilbert Hall , Corvallis , OR 97331 , USA .
| | - Charlene Fallan
- EaStCHEM , School of Chemistry , University of St Andrews , North Haugh , St Andrews KY16 9ST , UK .
| | - Mark D Greenhalgh
- EaStCHEM , School of Chemistry , University of St Andrews , North Haugh , St Andrews KY16 9ST , UK .
| | - Paul Ha-Yeon Cheong
- Department of Chemistry , Oregon State University , 135 Gilbert Hall , Corvallis , OR 97331 , USA .
| | - Andrew D Smith
- EaStCHEM , School of Chemistry , University of St Andrews , North Haugh , St Andrews KY16 9ST , UK .
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88
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Lipp A, Lahm G, Opatz T. Light Induced C–C Coupling of 2-Chlorobenzazoles with Carbamates, Alcohols, and Ethers. J Org Chem 2016; 81:4890-7. [DOI: 10.1021/acs.joc.6b00715] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Alexander Lipp
- Institute of Organic Chemistry, University of Mainz, Duesbergweg 10-14, D-55128 Mainz, Germany
| | - Günther Lahm
- Institute of Organic Chemistry, University of Mainz, Duesbergweg 10-14, D-55128 Mainz, Germany
| | - Till Opatz
- Institute of Organic Chemistry, University of Mainz, Duesbergweg 10-14, D-55128 Mainz, Germany
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89
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Aziz J, Baladi T, Piguel S. Direct Alkynylation of 3H-Imidazo[4,5-b]pyridines Using gem-Dibromoalkenes as Alkynes Source. J Org Chem 2016; 81:4122-33. [DOI: 10.1021/acs.joc.6b00406] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Jessy Aziz
- Institut
Curie, PSL Research University, CNRS, INSERM, UMR9187-U1196, F-91405, Orsay, France
| | - Tom Baladi
- Institut
Curie, PSL Research University, CNRS, INSERM, UMR9187-U1196, F-91405, Orsay, France
| | - Sandrine Piguel
- Institut
Curie, Université Paris Sud, Université Paris-Saclay, F-91405, Orsay, France
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90
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Aljaar N, Malakar CC, Conrad J, Beifuss U. Base-Promoted Domino Reaction of 5-Substituted 2-Nitrosophenols with Bromomethyl Aryl Ketones: A Transition-Metal-Free Approach to 2-Aroylbenzoxazoles. J Org Chem 2015; 80:10829-37. [PMID: 26399156 DOI: 10.1021/acs.joc.5b02000] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The reaction of 5-substituted 2-nitrosophenols with bromomethyl aryl ketones and related compounds employing K2CO3 as a base in refluxing THF and DMF at 80 °C, respectively, delivers 2-aroylbenzoxazoles in a single step with yields up to 85%. The new method involves an intermolecular nucleophilic substitution followed by intramolecular 1,2-addition and elimination. It allows an efficient and practical access to 2-aroylbenzoxazoles under transition-metal-free conditions.
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Affiliation(s)
- Nayyef Aljaar
- Bioorganische Chemie, Institut für Chemie, Universität Hohenheim , Garbenstraße 30, D-70599 Stuttgart, Germany.,Faculty of Pharmacy and Medical Sciences, Al-Ahliyya Amman University , Amman 19328, Jordan
| | - Chandi C Malakar
- Bioorganische Chemie, Institut für Chemie, Universität Hohenheim , Garbenstraße 30, D-70599 Stuttgart, Germany
| | - Jürgen Conrad
- Bioorganische Chemie, Institut für Chemie, Universität Hohenheim , Garbenstraße 30, D-70599 Stuttgart, Germany
| | - Uwe Beifuss
- Bioorganische Chemie, Institut für Chemie, Universität Hohenheim , Garbenstraße 30, D-70599 Stuttgart, Germany
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91
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Singh S, Veeraswamy G, Bhattarai D, Goo JI, Lee K, Choi Y. Recent Advances in the Development of Pharmacologically Active Compounds that Contain a Benzoxazole Scaffold. ASIAN J ORG CHEM 2015. [DOI: 10.1002/ajoc.201500235] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Sarbjit Singh
- College of Pharmacy; Dongguk University-Seoul; Republic of Korea
| | - Gajulapati Veeraswamy
- College of Life Science and Biotechnology; Korea University-Seoul; Republic of Korea
| | - Deepak Bhattarai
- College of Pharmacy; Dongguk University-Seoul; Republic of Korea
| | - Ja-Il Goo
- College of Life Science and Biotechnology; Korea University-Seoul; Republic of Korea
| | - Kyeong Lee
- College of Pharmacy; Dongguk University-Seoul; Republic of Korea
| | - Yongseok Choi
- College of Life Science and Biotechnology; Korea University-Seoul; Republic of Korea
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92
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Sun M, Zhang X, Hao H, Li W, Lu C. Nocarbenzoxazoles A-G, Benzoxazoles Produced by Halophilic Nocardiopsis lucentensis DSM 44048. JOURNAL OF NATURAL PRODUCTS 2015; 78:2123-2127. [PMID: 26270803 DOI: 10.1021/acs.jnatprod.5b00031] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Seven new benzoxazole derivatives, nocarbenzoxazoles A-G (1-7), were isolated from the halophilic strain Nocardiopsis lucentensis DSM 44048. Their structures were elucidated on the basis of 1D and 2D NMR spectroscopic data, HRESIMS, and X-ray single-crystal diffraction. The isolated compounds were assayed for their cytotoxicity against a panel of human tumor cell lines (HepG2, MDA-MB-231, MDA-MB-435, HeLa, and PC3). Compounds 1-6 were found to have modest or no activity. Compound 7 showed selective activity against HepG2 and HeLa with IC₅₀ values of 3 and 1 μM, respectively.
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Affiliation(s)
- Mingwei Sun
- Key Laboratory of Chemical Biology (Ministry of Education), School of Pharmaceutical Sciences, Shandong University , No. 44 West Wenhua Road, Jinan, Shandong 250012, People's Republic of China
| | - Xiaomei Zhang
- Key Laboratory of Microbial Diversity in Southwest China, Ministry of Education and Laboratory for Conservation and Utilization of Bio-Resources, Yunnan Institute of Microbiology, Yunnan University , Kunming, Yunnan 650091, People's Republic of China
| | - Huilin Hao
- Key Laboratory of Chemical Biology (Ministry of Education), School of Pharmaceutical Sciences, Shandong University , No. 44 West Wenhua Road, Jinan, Shandong 250012, People's Republic of China
| | - Wenjun Li
- Key Laboratory of Microbial Diversity in Southwest China, Ministry of Education and Laboratory for Conservation and Utilization of Bio-Resources, Yunnan Institute of Microbiology, Yunnan University , Kunming, Yunnan 650091, People's Republic of China
| | - Chunhua Lu
- Key Laboratory of Chemical Biology (Ministry of Education), School of Pharmaceutical Sciences, Shandong University , No. 44 West Wenhua Road, Jinan, Shandong 250012, People's Republic of China
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93
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Aksenov NA, Aksenov AV, Nadein ON, Aksenov DA, Smirnov AN, Rubin M. One-pot synthesis of benzoxazoles via the metal-free ortho-C–H functionalization of phenols with nitroalkanes. RSC Adv 2015. [DOI: 10.1039/c5ra15128g] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023] Open
Abstract
PPA-activated nitroalkanes are employed in the design of a one-pot cascade transformation involvingortho-C–H functionalization, by Beckman rearrangement, and condensation to produce benzoxazoles and benzobisoxazoles directly from phenols.
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Affiliation(s)
- Nicolai A. Aksenov
- Department of Chemistry
- North Caucasus Federal University
- Stavropol 355009
- Russian Federation
| | - Alexander V. Aksenov
- Department of Chemistry
- North Caucasus Federal University
- Stavropol 355009
- Russian Federation
| | - Oleg N. Nadein
- Department of Chemistry
- North Caucasus Federal University
- Stavropol 355009
- Russian Federation
| | - Dmitrii A. Aksenov
- Department of Chemistry
- North Caucasus Federal University
- Stavropol 355009
- Russian Federation
| | - Alexander N. Smirnov
- Department of Chemistry
- North Caucasus Federal University
- Stavropol 355009
- Russian Federation
| | - Michael Rubin
- Department of Chemistry
- North Caucasus Federal University
- Stavropol 355009
- Russian Federation
- Department of Chemistry
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