Role of Some Newly Synthesized Tetrahydronaphthalenthiazol Derivatives as Anticancer Compounds

New Thiazoline-Tetralin Derivatives and Biological Activity Evaluation

In this study, novel N′-(3-cyclohexyl/phenyl-4-(substituted phenyl)thiazole-2(3H)-ylidene)-2-[(5,6,7,8-tetrahydronaphthalen-2-yl)oxy]acetohydrazide (4a–4k) derivatives were synthesized and their anticancer potency were evaluated on human breast adenocarcinoma cell line (MCF-7), human lung carcinoma cell line (A549) and mouse embryoblast cell line (NIH/3T3) using the MTT method, DNA synthesis inhibition and flow cytometric analysis. Compound 4e bearing 4-methoxyphenyl moiety exhibited the highest antitumor efficiency against MCF-7 cell line with higher DNA synthesis inhibition and apoptotic cell percentages (ealy+late apoptotic cell). On the other hand, compounds 4f, 4g, and 4h bearing 4-bromo, 4-chloro and 4-florophenyl moieties, respectively caused excellent apoptosis levels against A549 cell line when treated with lower concentration even than cisplatin. Anticholinesterase activity of the compounds were also tested, compound 4h showed 49.92% inhibition of acetylcholinesterase (AChE).

Theoretical investigation on tautomerism and NBO analysis of 3-hydroxy-1,2,5-thiadiazole derivatives: solvent and substituent effects

Thiadiazole compounds including 3-hydroxy-4-substituted-1,2,5-thiadiazole are known as non-nucleoside inhibitors of HIV-1. Density functional calculations at the B3LYP/6-311++G(d,p) level were employed to determine the stability, tautomerism, and substituent effects of 1,2,5-thiadiazole, a widely used skin-whitening, antibrowning, and antibacterial agent, and its derivatives (4-NO

Regioselective synthesis of novel 3-thiazolidine acetic acid derivatives from glycosido ureides

A series of 3-thiazolidine acetic acid-2-(per-O-acetylglycosyl)-1'-imino-α-(substituted)-4-oxo ethyl ester derivatives (3a-t) were prepared via the reaction of substituted amino acid-N-[(per-O-acetylglycosylamino)thioxomethyl]-ethyl ester with ethyl bromoacetate. The crystal structure of 3-thiazolidine acetic acid-2-(2',3',4',6'-tetra-O-acetyl-β-D-galactoyranosyl)-1'-imino-α-methyl-4-oxo ethyl ester 3g and ¹H-¹³C HMBC (2D NMR experiments) measurements of 3-thiazolidine acetic acid-2-(2',3',4',6'-tetra-O-acetyl-β-D-galactopyranosyl)-1'-imino-α-(1-methylthio)ethyl-4-oxo ethyl ester 3j revealed the exclusive regioselectivity during the closure of these rings toward the N-2 position of the thiourea moiety. Furthermore, the crystal structure of compound 3g showed that the attack of N-1 was blocked by sugar ring owing to the steric effect. The bioactivity data suggested that compound 2e has mild anticancer activity.

Synthesis and antimicrobial evaluation of new 3-alkyl/aryl-2-[((alpha,alpha-diphenyl-alpha-hydroxy)acetyl)hydrazono]-5-methyl-4-thiazolidinones

New 4-thiazolidinone derivatives of benzilic acid (alpha,alpha-diphenyl-alpha-hydroxyacetic acid) have been synthesized and evaluated for antibacterial and antifungal activities. The reaction of 1- (alpha,alpha-diphenyl-alpha-hydroxy)acetyl-4-alkyl/arylthiosemicarbazides with ethyl 2-bromopropionate gave 3-alkyl/aryl-2-[((alpha,alpha-diphenyl-alpha-hydroxy)acetyl)hydrazono]-5-methyl-4-thiazolidinone derivatives. Their antibacterial and antifungal activities were evaluated against S. aureus ATCC 29213, P. aeruginosa ATCC 27853, E. coli ATCC 25922, C. albicans ATCC 10231, C. parapsilosis ATCC 22019, C. krusei ATCC 6258, T. mentagrophytes var. erinacei NCPF 375, M. gypseum NCPF 580 and T. tonsurans NCPF 245. 3e, 3f, 3g and 3h showed the highest antibacterial activity. Particularly 3a and 3e showed the highest antifungal activities against C. parapsilosis ATCC 22019, T. tonsurans NCPF 245 and M. gypseum NCPF 580.