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• W2953048481 abstract "In an effort to establish new candidates with improved antineoplastic, anti-HIV-1 and antimicrobial activities we report here the synthesis and in vitro biological evaluation of various series of 2-substituted benzoxazoles: 2-[(Arylhydrazono, arylidene, cycloalkylidene and N-substituted thiocarbamoyl)cyanomethyl]-benzoxazoles(2-4 and 7, respectively); 2-[(4- or 5-oxothiazoliden-2-yliden)benzoxazoles (5 and 6) and 2-(4-amino-3-substituted-2-thioxo-2,3-dihydrothiazol-5-yl)benzoxazoles (8), together with the synthesis of some substituted 3H-pyrido[2,1-b]benzoxazoles (9-11). The absolute configuration of compound 3b was determined by X-ray crystallography. The results of the in vitro anticancer screening revealed that some of the tested compounds exhibited broad spectrum antitumor activity. The most active compounds are 2a, 3b, 8a and 8d, their GI50 MG-MID values: 37.7, 19.1, 20.0 and 15.8 microM; TGI MG-MID values: 75.9, 53.7, 53.7, and 58.9 microM; and LC50 MG-MID values: 97.7, 93.3, 89.1 and 93.3 microM, respectively. The in vitro microbiological data showed that compound 7c was the most active against Staphylococcus aureus (minimal inhibitory concentration (MIC)<12.5 microg ml(-1). While compounds 5, 8a, and 8d were the most active against Bacillus subtilis (MIC values<12.5 microg ml(-1)). On the other hand, compounds 5 and 7c were the most active against Escherichia coli (MIC<25 microg ml(-1)), their activity is about half the activity of ampicillin and streptomycin . In addition, compound 4b and 7c were the most active against Pseudomonas aeruginosa (MIC<25, 50 microg ml(-1)). Compound 4b was two times as active as ampicillin and streptomycin while compound 7c was active as both. The results of antimycotic activity indicated that, Compound 7c showed mild activity against Candida albicans when compared with clotrimazole (MIC<100 microg ml(-1)). In vitro HIV-1 testing revealed that compound 7a displayed moderate anti-HIV-1 activity (maximum % cell protection, 36.6 at 2 x 10(-5) microM)." @default.
• W2953048481 created "2019-06-27" @default.
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• W2953048481 date "2005-09-01" @default.
• W2953048481 modified "2023-09-26" @default.
• W2953048481 title "Synthesis of some novel benzoxazole derivatives as anticancer, anti-HIV-1 and antimicrobial agents" @default.
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• W2953048481 doi "https://doi.org/10.1016/j.ejmech.2005.03.023" @default.
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