A new type of magnetically-recoverable catalyst was synthesized by the immobilization of H3PW12O40 on the surface of silica-encapsulated -Fe2O3 nanoparticles. A series of novel 1,3,5-triaryl pyrazoline derivatives has been synthesized by the reaction of chalcone and phenylhydrazine in the presence of the -Fe2O3@SiO2-PW12nanoparticles,  in high yields. The structures of compounds obtained were...

In the title chalcone derivative, C(15)H(8)Cl(4)O, the C=C double bond exists in an E configuration and the dihedral angle between the two benzene rings is 48.13 (11)°. In the crystal, mol-ecules are arranged into columns and stacked down the a axis featuring possible weak aromatic π-π stacking inter-actions [centroid-centroid separation = 3.888 (2) Å].

The dissociation constants of some synthesized chalcones have been measured by Calvin Bjerrum pH titration method in DMF–water (60: 40 v/v) system at 303.15 K. It is observed that dissociation constant depends on the substituent groups present in compounds.

Abstract In this study, new chalcone and epoxy synthesized by condensation of 4-acetylbiphenyl with the appropriate aldehydes. The prepared via reaction alkaline hydrogen peroxide in methanol. We characterized their mass spectra 1H, 13C-NMR, 2D-HSQC to confirm structure absolute configuration. target compounds were then screened for potential antibacterial antifungal activities. Most tested had...

The title compound, C(20)H(18)N(2)O(4), is a chalcone derivative of pyrazole. The pyrazole ring is inclined at a dihedral angle of 19.29 (12)° to the methoxy-phenyl ring mean plane, and by 1.19 (13)° to the phenyl ring. The mol-ecular structure is stabilized by an intra-molecular O-H⋯O hydrogen bond, making an almost planar (r.m.s. deviation = 0.0243 Å) six membered ring.

In this study, some novel mono- and di-O-β-D-glycopyranosyl chalcone analogs were designed, synthesized, characterized. The derivatives synthesized with good yields by base-catalyzed Claisen-Schmidt condensation in EtOH solution. Then these chalcones reacted TAGBr (2,3,4,6-tetra-O-acetyl-μ-D-glucopyranosylbromide) dry acetone under the anhydrous condition at 0-5 °C. Deacylated was carried out Z...

(E)-3-(2,6-difluorophenyl)-1-(4-methoxyphenyl)prop-2-en-1-one (1) was synthesized and characterized by 1H 13C NMR, mass spectrometry, single-crystal X-ray diffraction. Photolysis (λirr = 300 nm) of chalcone 1 in the crystalline solid state resulted stereospecific formation syn-head-to-head photodimer (β-truxinic).