AbstractAn expeditious, metal-free protocol has been demonstrated for the synthesis of isoxazolone derivatives using domino multi-component strategy. The envisaged methodology involves the L-valine promoted three-component cyclo-condensation reaction of alkylacetoacetates, hydroxylamine hydrochloride and aldehydes in ethanol under reflux. The reaction proceeded to deliver the desired products in good

AbstractSome of the chalcones and flavones are very efficient to facilitate the signal of death to the lung cancer cell through blocking the active site BH3 of Bcl-2 proteins. We designed a number of novel chalcones and flavones targeting the active site of the protein. Docking study showed that the designed compounds were very efficient as the reported compounds. We synthesized and characterized some

AbstractAmyloids, a well-ordered β-sheet-enriched structural network, can be broadly defined as insoluble protein aggregates that are linked to a wide variety of diseases including systemic amyloidosis and some neurodegenerative disorders. Ferulic acid (FA), a phenolic acid, abundant in antioxidant and efficient pharmaceutical has beneficial effects against several ailments. Based on this, we have

AbstractIn this work, we evaluated the antiproliferative and anti-inflammatory activities of two diosgenin prodrugs. The prodrugs were obtained by esterification of diosgenin at position 3 with 4-oxo-4-(prop-2-yn-1-yloxy)butanoic acid followed by click reaction on terminal alkyne with 3-azidopropan-1-ol N-alkylated dendrons, resulting in a prodrug with methyl ester end-groups and a derivative with

AbstractA polyelectrolyte complex (PEC) made up of poly(di-allyl di-methylammonium chloride) and poly(styrene sulphonate) polyelectrolytes has been synthesised and used for the immobilisation of phosphomolybdate (PMo), \( \left[ {{\text{PMo}}_{12} {\text{O}}_{40} } \right]^{ 3- } \) nanoclusters. The material is characterised by FTIR, powder XRD, SEM, TEM and UV-Visible DRS spectroscopy. It was found

AbstractThe novel energetic triblock copolymer of polypropylene glycol-glycidyl azide polymer-polypropylene glycol (PPG-GAP-PPG) (\( \bar{M}_{\text{n}} \) = 1639 g·mol−1) was synthesized and optimized by cationic ring-opening polymerization of propylene oxide using low-molecular-weight glycidyl azide polymer (GAP) (\( \bar{M}_{\text{n}} \) =1127 g·mol−1) as the initiator and boron trifluoride etherate

AbstractThis report describes the synthesis and structural characterizations of three new complexes; [Na3Fe2(bbp)(Hbbp)(CN)6(H2O)9]·4H2O (1), (Bu4N)[Fe(bbp)2]·3CH3OH·2H2O (2), and a cyano-bridged dinuclear copper(II) complex, [Cu2(tren)2(CN)][Fe(bbp)2]3· 6CH3OH·4H2O (3), where H2bbp = bis(2-benzimidazolyl)pyridine and tren = tris(2-aminoethyl)amine. X-ray crystallography reveals that the geometry of

AbstractHere reports a hollow cube NiCo2S4 nanomaterial, which was prepared via facile hydroxylation and sulfuration steps using the self-prepared ZIF-67 as a precursor. This kind of NiCo2S4 as an electrode material for supercapacitor presents a specific capacitance high up to 1350 F g-1 at 1 A g-1 due to the contribution of pseudocapacitance. Particularly, the hybrid supercapacitor PC//NiCo2S4, assembled

AbstractNew steroidal D-homo androstane derivatives with 5β,6β-epoxy-3,16-dicarbonyl, 6α- and 6β-hydroxy-3,16-dicarbonyl and 3β,5α-dihydroxy-6,16-dicarbonyl moieties were synthesized and confirmed by NMR spectroscopy. Novel and starting compounds were evaluated for their potential cytotoxicity in vitro against seven human cancer cell lines (MCF-7, MDA-MB-231, PC3, HeLa, HT-29, A549 and CEM) and one

AbstractThe quinazoline-2,4-diones scaffold is found in bioactive compounds, commercial drugs and exhibit important biological activities. However, their antidiabetic activity is rarely explored. For this purpose, an easy one-pot three-components and straightforward synthesis of 3-substituted quinazoline-2,4-diones was designed, in both, the catalyst- and solvent-free conditions under microwave irradiation

AbstractThe metal–organic frameworks (MOFs) or porous coordination polymers (PCPs) are a class of porous, crystalline material with numerous possibilities of real-world applications including storage, separation, catalysis, sensing etc. The possibility of intrinsic crystallinity and virtually infinite metal/metal-oxo node and organic linker combination make it a perfect material for photophysical studies

AbstractEver since the halogen dance reaction was discovered by Bunnet et al, synthetic chemists have utilized the transformation in many desirable ways to build substituted heterocyclic target molecules of all kind. Using DFT-Cam-B3LYP/ land2dz computations and focused on Hannes Frohlich et al. Halogen Dance (HD) reactions of bromothiophenes, a new bromo-bridged Transition State (TS) is proposed.

AbstractSynthetic efforts toward the synthesis of (+)-lyconadin A are described. B-Alkyl Suzuki coupling is utilized for combining 2-iodo cyclohexenone with the piperidine subunit. The piperidine subunit is derived from 5-bromo-3-nicotinic acid, and iodo cyclohexenone from commercially available (R)-pulegone. An intramolecular Michael reaction is employed for the creation of the C6-C7 bond. Graphic

AbstractA Protein Data Bank study was conducted to check the role of C-halogen(X)…pi interactions (X = F, Cl, Br, I) in nucleic acids. The presence of halogens can be attributed to not only the modified residues of the nucleic acid but also the ones associated with the ligand. The study reports the presence of bromine amongst modified residues of the nucleic acid being the maximum than any other halogens

AbstractA powerful analgesic, anti-inflammatory and antimicrobial drug was developed by synthesizing a set of new indole-2,3-dione derivatives. The chemical structures of the synthesized derivatives were confirmed by spectroscopic and elemental analyses. Tail flick method, carrageenan-induced foot paw edema technique and agar streak dilution methods were employed to evaluate analgesic, anti-inflammatory

AbstractTrivalent lanthanide ions show interesting optical properties. Keeping this in view, five Sm(III) complexes were synthesized using 4-oxo-4H-1-benzopyran-3-carboxaldehyde (L) as primary ligand along with 1,10-Phenanthroline (Phen); Bipyridine (Bipy); Bathophenanthroline (Bathophen) and Neocuproine (Neo) as secondary ligands. Characterizations of prepared complexes were carried out by means of

AbstractN-alkylation of heterocycles with 1,3-dibromopropane using Schiff base Co(II), Ni(II), Cu(II) and Zn(II) transition metal complexes as a catalyst was studied in 1:1 and 2:1 coupling ratios under mild conditions. It was observed that all the complexes worked as efficient catalyst with product yield 78–92% for coupling ratio 1:1 and product yield 63–78% for coupling ratio 2:1. N-alkylation of

AbstractA simple, selective and rapid determination procedure for Th, Zr and Sc in rock samples using adsorbent silica modified with arsenazo-III is described. Silica modified with arsenazo-III (SAR-III) was synthesised by a single step process in presence of cationic surfactant cetyltrimethylammonium bromide. Effect of pH, amount of adsorbent, contact time for adsorption and the optimum eluent for

AbstractThis study demonstrates the design, synthesis and sensing applications of a simple and efficient chemosensor, 2-(1,3-dioxo-1H-inden-2(3H)-ylidene)hydrazinecarbothioamide (R) for quick detection of Hg2+ and F− in aqueous media using a colorimetric test, UV–Vis spectral analysis, and silica gel support. Sensor R showed the typical absorption peak at 305 nm for Hg2+ which is responsible for color

AbstractA novel route for the preparation of 2H-1,4- benzoxazin-3(4H)one and 1,5 benzoxazepinones by intramolecular cyclization of N-hydroxy 2-phenoxyacetamide and N-hydroxy -3 phenoxypropanamide using PPA and Lewis acid has been discussed. Graphical abstract Preparation of 2H-1,4- benzoxazin-3(4H)one and 1,5 benzoxazepinones by electrophilic aromatic substitution from N-hydroxy 2-phenoxyacetamide

This study reports the development of a novel substituted hydrazone prepared from 2-hydroxy-4,5-dimethylacetophenone and hydrazine in alkaline medium at controlled conditions which yields as corresponding hydrazone [(E)-2-(1-hydrazonoethyl)-4,5-dimethylphenol]. The structure of synthesized (E)-2-(1-hydrazonoethyl)-4,5-dimethylphenol was elucidated by elemental analysis and spectroscopic techniques

AbstractNovel film catalysts of the polystyrene (Ps) and trimethyl phosphate (P) nanoparticles were synthesized on glass substrates by soft chemistry using doctor blade method. Subsequently, the prepared Ps–P film catalysts were characterized by various techniques, including fourier transform infrared spectroscopy (FTIR), nuclear magnetic resonance (NMR), density (d), polarizing microscope (PM), X-ray

AbstractIn this work, we report the synthesis of new pyrazole derivatives bearing amide and sulfonamide frameworks from aza-aurones. Firstly, the intermediate spiropyrazolines were obtained through a highly regioselective 1,3-dipolar cycloaddition of nitrilimines with aza-aurones. Subsequently, the obtained cycloadducts were subjected to hydrochloric acid in hot ethanol which conducts to 5-(2-aminobenzoyl)-3

AbstractA 3D neutral porous MOF (1), [Co2(tdc)2(Hdatz)·DMF(H2O)3]n (H2tdc = 2,5-thiophenedicarboxylic acid, Hdatz = 3,5-diamino-1,2,4-triazole), which has aplenty micropores along with free groups of NH2 was assembled via combining 2,5-thiophenedicarboxylic acid ligands and nitrogen-rich 3,5-diamino-1,2,4-triazole as well as Co(II) ion. The activated MOF (1a) has a fine affinity for CO2 molecules and

AbstractThis study reports a simple process to synthesize and separate of 2-(substituted-phenyl) benzimidazole derivatives with high yield and efficiency. Specifically, by reacting ortho-phenylenediamines with benzaldehydes using sodium metabisulphite as an oxidation agent in a mixture of solvent under mild condition, twenty-three compounds of benzimidazoles were obtained and separated easily using

AbstractA novel conjugated Schiff base-based chemosensor DAP, N′-((1E,2E)-3-(4-(dimethylamino)phenyl)allylidene)-3-nitrobenzohydrazide, has been synthesized. DAP showed significant selectivity toward mercury ion by color change of pale yellow to orange. Detection limit was 0.11 μM, which is lower than the value (2.48 μM) recommended by Health Canada. DAP could recognize and quantify mercury ion in

AbstractA procedure for the expedient synthesis of well-characterized Cu(I) oxide nanoparticles (Cu2ONPs) from Cu(II) salts by employing Rice (Oryza sativa) as a cheap and ready source of reducing as well as stabilizing agent has been demonstrated. The judicious choice of rice as a catalyst has helped in the symbiotic combination of two events: viz., acidic hydrolysis of starch to form glucose and

AbstractWe report herein the synthesis, quantum chemical electronic structure, Hirshfeld surface and molecular docking studies of 3-anisaldehyde thiosemicarbazone (I). The compound has been characterized by NMR (1H, 13C) and IR spectroscopy. Hirshfeld surface analysis has been performed to understand the intermolecular interactions. The quantum chemical calculations show good consistency between the