A simple microwave assisted tungstophosphoric acid (H3PW12O40) catalyzed protocol was employed for the synthesis of versatile enaminoketones. The developed synthetic procedure is green, efficient and environmentally benign. Using this method, a series of enaminoketones were prepared from the condensation of dimedone and various amines. Further, the synthesized enaminoketones were evaluated for in-vitro anti-inflammatory activity by membrane stabilization method and anti-oxidant efficacy by radical scavenging method. The synthesized enaminoketones 3c, 3b and 3b, 3f showed reasonable anti-inflammatory as well as anti-oxidant activities respectively.

The AC@CuO-NWs nanocomposite was synthesized and examined using various spectroscopic methods. The XRD results established with the monoclinic structure, average crystalline size ti 17.48 nm of CuONWs. This material FE-SEM image established the wire shaped and EDX examination approves the CuO nanomaterial. The FE-SEM image demonstrated that nanowires are agglomerated to each other and formed flower form on composite. The adsorption and photocatalytic degradation studies were examined under natural sunlight irradiation in contrast to the Methylene blue dye.(c) 2019 Elsevier Ltd. All rights reserved. Selection and peer-review under responsibility of the scientific committee of NANOSMAT Mediterrane.

An effective and highly sustainable method has been developed for the Suzuki coupling reaction of aryl halides and phenylboronic acid using in situ generated nacocellulose (NC) supported palladium nanoparticles (Pd@NC NPs) as heterogeneous catalysts in water. The formation of PdNPs was observed in the absence of additional reagents, during the course of the Suzuki reaction from NC and Pd(OAc)(2). In situ formed Pd@NC NPs have been systematically characterized using TEM, EDX, XRD and FT-IR techniques. The in situ generated catalyst was separated and studied for its successful reusability up to 11 cycles. The application of aqueous media, use of in situ formed catalyst, mild reaction conditions, absence of volatile organic solvents, broad substrate scope, high product isolated yields are the significant developments of this protocol. The nanocellulose used for this protocol has been generated form the waste cotton cloth and hence it is an example for the waste to wealth and sustainable approach. (C) 2021 Elsevier B.V. All rights reserved.

The burgeoning interest in synthesis and biological applications of 1,6-naphthyridines reflects the importance of 1,6-naphthyridines in the synthetic as well as medicinal chemistry fields. Specially, 1,6-naphthyridines are pharmacologically active, with variety of applications such as anticancer, anti-human immunodeficiency virus (HIV), anti-microbial, analgesic, anti-inflammatory and anti-oxidant activities. Although collective recent synthetic developments have paved a path to a wide range of functionalized 1,6-naphthyridines, a complete correlation of synthesis with biological activity remains elusive. The current review focuses on recent synthetic developments from the last decade and a thorough study of the anticancer activity of 1,6-naphthyridines on different cancer cell lines. Anticancer activity has been correlated to 1,6-naphthyridines using the literature on the structure–activity relationship (SAR) along with molecular modeling studies. Exceptionally, at the end of this review, the utility of 1,6-naphthyridines displaying activities other than anticancer has also been included as a glimmering extension.

A novel 2-Butyl-4-chloro-5-formylimidazole thiosemicarbazonecobalt (II) complex is synthesized and characterized by using spectroscopic techniques like elemental analysis, FT-IR, HRMS, electronic spectral analysis and Powder-X-ray diffraction. The Co(II) complex is found to be highly efficient in inhibiting the growth of human pathogens likeS. aureusand B. megaterium with MIC value 12.0 mu g/mL whose inhibition zones are almost comparable with the standard antibiotic. The synthesized complex well occupies in the active site of /3- ketoacyl-acyl carrier protein synthase III enzyme (PDB: 1MZS), in consists of catalytic triad and adenine-binding site, so the designed compoundis promising for to treat bacterial infection.

In this work, (E)-2-((2-butyl-4-chloro-1H-imidazol-5-yl)methylene)-N-methylhydrazine-carbothioamide (L) and its Cu(II), Ni(II) and Mn(II) complexes were synthesized. The ligand (L) characterized by H-1, C-13 NMR, IR, HRMS and UV-Visible techniques and theoretical calculations have been performed at DFT level of theory using B3LYP functional and 6-31G (d, p) as a basis set. The molecular geometrical parameters, frontier molecular orbital energies (HOMO, LUMO) and their energy gap (Delta E= 0.1009 eV) have been calculated. The complexes were characterized by spectroscopic techniques like FT-IR, HRMS, UV, EPR, Powder X-Ray diffraction and cyclic voltammetry studies. All the compounds show good activity against Staphylococcus aureus. When compared to the L and Mn(II)-L complex, Cu(II)-L and Ni(II)-L complexes were found to have more antioxidant activity by DPPH method. Compound inhibited the proliferation of MDA-MB231 cell lines, in dose dependent manner, Cu(II)-L, Ni(II)-L and Mn(II)-L complexes shows IC50 values 60, 100 and 150 mu M with 48.2, 44.8 and 41 percentage cell death respectively. All the synthesized compounds well occupy in the catalytic triad and adenine-binding site, of beta-ketoacylacyl carrier protein synthase III enzyme (PDB ID: 1MZS). Synthesized compounds also well occupied into the helix 12 (formed by residue Asp538, Leu539, G1y542, Met543) of the human estrogen receptor (PDB ID: 3ERT). The molecular docking results also provided some useful information for the future design of more potent inhibitors. (C) 2019 Published by Elsevier B.V.

Two slightly distorted octahedral complexes of copper(II) with (E)-2-((E)-3-(3,4,5-trime thoxyphenyl)allylidene)hydrazinecarbothioamide (L1) common name 3,4,5-trimethoxy-cinnamalde hydethiosemicarbazone and (E)-N-phenyl-24(E)-3-(3,4,5-trimethoxyphenyl)-allylidene)hydrazine carbothioamide (L2) common name 3,4,5-trimethoxycinnamaldehyde-4-phenylthiosemicarbazone have been synthesized. The two free ligands and their copper(II) complexes were characterized by spectroscopic techniques like FT-IR, FT-Raman, UV, EPR, Powder X-ray diffraction and cyclic voltammetry. The EPR spectra evidenced a rhombically distorted octahedron geometry for both the copper(II) complexes. The band gap calculations for the ligands L1, L2 and their complexes Cu (L1)(2)Cl-2 and Cu(L-2)(2)Cl-2 were found to be 2.98, 2.61, 2.66 and 2.50 eV respectively. Cu(L1)(2)Cl-2 and Cu(L-2)(2)Cl-2 have shown 50% of viability at 80 mu g/ml and 60 mu g/ml. The anti-oxidant activity study revealed that the compounds are good reductants of DPPH radical. Moderate to good antibacterial activity is shown by the compounds against the Gram-positive and Gram-negative bacteria. Molecular docking studies have been carried out to predict the orientation and binding mode of analysis in the active site. The synthesized ligand and complex well occupy (catalytic triad and adenine-binding site) in the active site of beta-ketoacyl-acyl carrier protein synthase III enzyme, and also well occupy in helix 11 (in the DCS complex) of human estrogen receptor. Moreover they form water mediated hydrogen bond and hydrogen bond with Cys530 residue. (C) 2019 King Saud University. Production and hosting by Elsevier B.V.

The title thiosemicarbazide derivative, C 10 H 16 ClN 5 S·H 2 O, crystallized as a monohydrate. The molecule has an E conformation about the azomethine C=N bond that links the methylhydrazine-1-carbothioamide moiety to the imidazole ring. The butyl chain substituent on the imdazole ring is disordered over two sets of sites, with a refined occupancy ratio of 0.509 (9):0.491 (9). In the crystal, molecules are linked by O—H...N and N—H...O hydrogen bonds involving the solvent water molecule, forming chains along the c- axis direction. The chains are linked by O—H...S and N—H...S hydrogen bonds, forming a three-dimensional framework.

Investigations have been carried out to study the use of Bengal gram fruit shell (SP) as a low-cost, eco-friendly biosorbent for the removal of Congo red (CR) from aqueous solution. Fourier transform infrared spectrometer and SEM were used to carry out characteristic studies on the material prepared. The effects of solution pH, biosorbent dosage, dye concentration, temperature, and contact time on the biosorption of CR onto the SP were investigated. The experimental results showed that maximum pH for efficient CR biosorption was about 8.0. Langmuir and Freundlich isotherm models were used for analyzing the equilibrium data. The maximum monolayer biosorption capacity was found as 22.22mgg(-1) at 35 degrees C. Kinetic studies indicated that the pseudo-second-order model fitted the experimental data well. Thermodynamic parameters demonstrated that the biosorption process was spontaneous and endothermic. The results revealed that the SP could be used as a low-cost and eco-friendly alternative biosorbent for the CR removal from wastewater.

Indian jujuba seed powder (IJSP) has been investigated as a low-cost and an eco-friendly biosorbent, prepared for the removal of Acid Blue 25 (AB25) from aqueous solution. The prepared biomaterial was characterized by using FTIR and scanning electron microscopic studies. The effect of operation variables, such as IJSP dosage, contact time, concentration, pH, and temperature on the removal of AB25 was investigated, using batch biosorption technique. Removal efficiency increased with increase of IJSP dosage but decreased with increase of temperature. The equilibrium data were analyzed by the Langmuir and the Freundlich isotherm models. The data fitted well with the Langmuir model with a maximum biosorption capacity of 54.95 mg g −1 . The pseudo-second-order kinetics was the best for the biosorption of AB25 by IJSP, with good correlation. Thermodynamic parameters such as standard free energy change ( Δ G 0 ), standard enthalpy changes ( Δ H 0 ), and standard entropy changes ( Δ S 0 ) were analyzed. The removal of AB25 from aqueous solution by IJSP was a spontaneous and exothermic adsorption process. The results suggest that IJSP is a potential low-cost and an eco-friendly biosorbent for the AB25 removal from synthetic AB25 wastewater.

A novel chelating tridentate organic ligand, 2-Butyl-4-chloro-5-formylimidazole thiosemicarbazone(L) is synthesized and characterized by using spectroscopic techniques like elemental analysis, FT-IR, 1H and 13C NMR, UV-vis and Mass spectrometry. The free ligand is then used for the synthesis of Mn(II) complex thoroughly characterized by FT-IR, EPR and electronic spectral analysis. The complex is found to have characteristic d5 electronic spectrum and the geometry of the complex is identified as octahedron based on the g value obtained from the EPR spectrum. Both the ligand and Mn(II)L2 compounds are found to exhibit similar antimicrobial activity against the gram –ve and gram +ve bacteria

A new cis-palladium(II)diaqua(3,4-difluoroacetophenonethiosemicarbazone complex (Pd(II) complex) is synthesized using 3,4-difluoroacetophenonethiosemicarbazone(L). The L and its Pd(II) complex are characterized and confirmed by elemental analyses, electrochemical analyses, FT-IR, FT-Raman, UV-Vis, HRMS and LC-MS techniques. Ligand L is further characterized by H-1, C-13 and F-19 NMR spectroscopy. The crystal structure of L is unambiguously characterized by single X-ray crystallography. The ligand (L) belongs to monoclinic system with P2(1)/C space group and the unit cell parameters are a(angstrom) = 9.1144(7), b(angstrom) = 13.7928(7), c(angstrom) = 8.4174(5), alpha(degrees)= 90, beta(degrees) = 100.715, gamma(degrees) = 90 and volume V(A(3))= 1039.73(11). The Raman bands observed for the L and its Pd(II) complex are in good agreement with the FT-IR spectral data. The Pd(II) complex is found to be highly efficient in inhibiting the growth of human pathogens like Salmonella typhimurium and Klebsiella pneumonia with MIC value 10.0 mu g/mL whose inhibition zones are almost comparable with the standard antibiotic. The synthesized compounds have shown antiproliferative activity against the human breast cancer cell lines MDA-MB231 by intermitting the regular pathway of ribonucleotidereductase. (C) 2013 Elsevier B.V. All rights reserved.