Current Issue : October - December Volume : 2013 Issue Number : 4 Articles : 7 Articles
The series of 48 8-Biarylchromen-4-one inhibitors of the DNA-dependent protein kinase (DNA-PK) was studied for 2D and 3D QSAR Studies as an anticancer agents. The cellular response to DNA double-strand break (DSB) formation is an essential component of normal cell survival, following exposure to DNA-damaging chemicals and ionizing radiation. The study was done using V-Life Molecular Design Suite (MDS 3.5) QSAR plus module. The best model were generated using Multiple Linear Regression (MLR) analysis (r2 = 0.8416, q2 = 0.7853, F test = 47.8273, pred_r2 = 0.8481, pred_r2se = 0.2880) and (r2 = 0.7781, q2 = 0.7274, F test = 42.517, pred_r2 = 0.8405, pred_r2se = 0.2951) for 2D and 3D QSAR respectively. For each set of descriptors, the best QSAR equations were obtained by the stepwise variable selection method using leave-one-out cross-validation as selection criterion. Physio-chemical descriptors (Chiv chain & Cluster) were found to be the most important descriptors in predicting anticancer activity....
Spiroketals are cyclic ketals in which two rings are joined by a single spiro atom and two ketal oxygen flanking the spiro atom, each belonging to one of the rings. Spiroketals are structural subunits found in many biologically active natural products originated from a variety of sources including marine organisms, vegetable, insect, microbes, and fungal sources. The Spiroketals moiety is often a primary pharmacophore in molecules having wide range of pharmacological activities such as anti-biotic, antifungal, anti-HIV, or could also find applications in cancer therapy. The present review emphasizes on the various methods used to synthesize spiroketals and their pharmacological evaluation from year 1979 to 2012....
In the present research work the motto was to develop new chemical entities as potential anti-inflammatory & analgesic agent. The various Schiff bases (3a-3g) & azetidinones (4a-4g) were synthesized. The compounds were characterized by TLC & spectral data....
A new series of N-mannich bases of benzothiazolone derived from 2-amino-5-aryl-1,3,4-thiadiazoles were characterized and evaluated for antimicrobial activities. The synthesized 2-oxobenzothiazoline used to prepare N-Mannich bases with 2-amino-5-aryl-1,3,4-thiadiazoles. The resulting compounds after purification and identification by spectral data were tested for antimicrobial activities. Compounds 3d & 3e were found to possess significant antibacterial activity against both gram positive and gram negative bacteria at the tested concentrations when compared with that of standard drug ampicillin. In antifungal study, compounds 3b, 3d and 3e have exhibited significant anti fungal activity when compared with standard drug fluconazole. The synthesized compounds can be further exploited to get the potent lead compounds....
The bacterial cell wall represents an attractive target site for antibiotic research as it is a fundamental structure for bacterial survival. The enzyme MurA (UDP-N-acetylglucosamine enolpyruvyl transferase), accomplishes an initial step in the cytoplasmic biosynthesis of peptidoglycan precursor molecules. It catalyzes the transfer reaction of phosphoenolypyruvate (PEP) to the 3‘hydroxyl’ group of UDP-N-acetyl glucosamine (UNAG) generating enolpyruvyl-UDPN-acetyl glucosamine (EP-UNAG) and inorganic phosphate. The broad-spectrum antibiotic fosfomycin – to date still the only known MurA inhibitor with clinical relevance - acts as an analogue of the substrate PEP by irreversible alkylation of the Cys115 thiol group. The MurA-dependent metabolites are of vital importance for bacteria, and the enzyme is therefore in the focus of anti bacterial drug discovery....
A new series of various different moieties were synthesized by the linkingfluorobenzothiazole with 1, 3, 4, thiadiazole upon treatment with β-alanine. Then latter novel synthesized moieties were characterized with help of elemental analysis, UV, FTIR, HNMR, MASS spectroscopy. The newly obtained moieties were screened for cyto-toxic activity....
Some derivatives of quinoxaline–2,3(1H, 4H)-dione were synthesized and characterized by IR, 1H-NMR, 13C-NMR and Mass spectral studies. Compounds were evaluated for their in-vitro antibacterial and antifungal activities. It was noted that Amino substituted compounds demonstrated potent antibacterial activity with moderate antifungal activity whilst nitro derivatives showed lesser activity. Among all compounds sulphonamides derivatives exhibited potent activity against test bacterial species. SD values indicated the significant disparity in structure of the compound and activity....
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