Synthesis, antimicrobial and antioxidant activities of 1-(1,4-benzodioxane-2-carbonyl)piperazine derivatives

A series of novel 1-(1,4-benzodioxane-2-carbonyl)piperazine derivatives (6a-h) and (7a-e) were synthesized by nucleophilic substitution reaction of 1-(1,4-benzodioxane-2-carbonyl)piperazine (3) with various sulfonyl and acid chlorides. The newly synthesized compounds were characterized by elemental analyses, UV-visible, FT-IR, 1H NMR and LC-MS spectral studies. All compounds were evaluated for in vitro antibacterial, antifungal and antioxidant activities. Compound, 4-(2-trifluoromethyl)-benzenesulfonyl-1-(1,4-benzodioxane -2-carbonyl)piperazine (6b) exhibited significant antimicrobial activity against tested pathogenic bacterial and fungal strains. Compound, 4-(3-methoxy)-benzoyl-1-(1,4-benzodioxane-2-carbonyl)piperazine (7a) showed moderate antioxidant activity compared to standard drug by 2,2-diphenyl-1-picrylhydrazyl (DPPH) assay method

Synthesis of metal nanoparticles using Heliconia rostrata leaf extract and their antiproliferative and apoptotic property

The silver and gold nanoparticles were biosynthesized using leaves of a pharmacologically important plant Heliconia rostrata. A rapid, eco-friendly, cost-effective and one-step process of synthesis has been achieved, thus produced nanoparticles were characterized by UV–visible, FT-IR, XRD and TEM spectral studies. Further, newly synthesized nanoparticles were used to study the induction of apoptotic activity on EAT cells. These two types of nanoparticles showed antiproliferative and apoptotic property in mice model. The outcome of this study could be useful for the development of value added products from indigenous medicinal plants, which has biomedical applications

Schiff bases of 4-(methylthio)benzaldehydes: Synthesis,characterization, antibacterial, antioxidant and cytotoxicity Studies

A series of new Schiff bases of 4-(methylthio)benzaldehyde derivatives 3(a-i) were synthesized by the reaction of 4-(methylthio)benzaldehyde with various amines 2(a-i). Newly synthesized compounds were characterized by elemental analyses, UV-visible, FT-IR, Mass and 1H NMR spectral studies. All compounds were evaluated for their in vitro antibacterial activity against clinically isolated strains i.e., E. Coli, P. Fluorescence, M. Luteus and B. Subtilis. These compounds were screened for their antioxidant activity by 2,2-diphenyl-1-picryl-hydrazyl (DPPH•) and ferrous ion chelating assay (Fe2+) methods. The cytotoxicity assay was performed by tryphan blue dye exclusion method. Compounds 3g, 3h and 3i exhibited good antibacterial activity when compared with other compounds in the series against tested pathogenic bacterial strains. All the compounds showed antioxidant activity, where compound 3b was the best radical scavenger and Fe2+ ion scavenger. These findings showed that the Schiff bases of 4-(methylthio)benzaldehyde derivatives possess antioxidant activity with different mechanism of actions towards the different free radicals tested. Among these derivatives, 3b and 3h had the strongest activity against human peripheral lymphocytes