ULTRAVIOLET ABSORPTION OF SUBSTITUTED PHENYL AND POLYCYCLIC ARYL CHALCONES
作者:Owen H. Wheeler、Peter H. Gore、Marcelina Santiago、Rosita Baez
DOI:10.1139/v64-377
日期:1964.11.1
The ultraviolet and near-visible light absorption of a number of substituted trans-chalcones are reported.
报道了一系列取代的反式查尔酮对紫外和近可见光的吸收。
Quantum chemical insight into molecular structure, density functional theory calculations, vibrational dynamics, natural population analysis, Hirshfeld analysis, and molecular docking approach to chalcone 1-4-bromophenyl-3-(2-methoxyphenyl)prop-2-en-1-one
作者:Y. Premila Rachelin、Sayantan Pradhan、C. James
DOI:10.1080/00387010.2018.1442352
日期:2018.3.16
3-parameter, Lee-Yang-Parr functional was used for the optimization of geometry. The comprehensive assignments of the vibrational spectra have been performed with the aid of normal coordinate analysis. Stability of the molecule and intra/intermolecular charge transfer have been analyzed using natural bond orbital analysis. The existence of intermolecular C-H⋯O, blueshifted hydrogen bond was investigated by bond
Synthesis of novel chalcones through palladium-catalyzed C O cross-coupling reaction of bromo-chalcones with ethyl acetohydroxamate and their antiplasmodial evaluation against Plasmodium falcipuram in vitro
作者:Reeta、Rajendran Vinoth、T.M. Rangarajan、Ayushee、Rishi Pal Singh、Manjula Singh
DOI:10.1016/j.bioorg.2019.02.016
日期:2019.5
An efficient method for palladium-catalyzed CO cross-coupling of ethyl acetohydroxamate (EAcHO) with 4-bromo-chalcones has been developed to synthesize novel chalcones. The two supporting ligands, namely tBuXPhos (L7), and cataCXium®PIntB (L16) were found to be effective ligands towards the Pd-catalyzed CO cross-coupling reaction to afford the desired product in moderate to excellent yields (50-99%)
Synthesis of N-acylated pyrazolines: Spectroscopic, crystallographic, Hirshfeld Surface, lead sensing and theoretical studies
作者:Mohammad Asad、Muhammad Nadeem Arshad、Abdullah M. Asiri、Hadi M. Marwani、Khalid A. Alamry、Mohammad Mahboob Alam、Syed Nazreen、Ahmed A. Elhenawy、Mohammed M. Rahman
DOI:10.1016/j.molliq.2023.122340
日期:2023.9
spectral analyses, as well as single crystal diffraction study (Sc-XRD). An effective metal ion sensor (Lead ion) with a flat glassy carbon electrode (GCE) was produced for prospective use by coupling a conducting coating binder (PEDOT:PSS) with a thin-layer NA2Pyr modified electrode (NA2Pyr/GCE). Linear sweep voltammetry was used to detect lead (Pb2+) ions in phosphate aqueous phase. The sensitivity (11,867
Synthesis and anti Methicillin resistant Staphylococcus aureus activity of substituted chalcones alone and in combination with non-beta-lactam antibiotics
A total of 30 chalcone analogues was synthesized via a base catalyzed Claisen Schmidt condensation and screened for their in vitro antibacterial activity against Methicillin-sensitive Staphylococcus aureus (MSSA) and Methicillin-resistant Staphylococcus aureus (MRSA) alone or in combination with non beta-lactam antibiotics namely ciprofloxacin, chloramphenicol, erythromycin, vancomycin, doxycycline and gentamicin. In the checkerboard technique, fractional inhibitory concentration indices (FICI) show that the following combinations like ciprofloxacin with 25 (4'-bromo-2-hydroxychalcone); doxycycline with 21 (4-hydroxychalcone); doxycycline with 25; and doxycycline with 4 (2',2-dihydroxychalcone) were synergistic against MRSA. In term SAR study, the relationship between chalcone structure and their antibacterial activity against S. aureus and synergy with tested antibiotics were discussed. Possible mechanisms for antibacterial activity of chalcones alone as well as the synergistic effect in combinations were proposed by molecular modeling studies, respectively. Combinations of chalcones with conventional antibiotics could be an effective alternative in the treatment of infection caused by MRSA. (C) 2012 Elsevier Ltd. All rights reserved.