Chalcone derivative compounds represented by general formula (I) or (II), wherein R₁ and R₂ each represents a halogen atom, a hydroxy group, an amino group, a dimethylamino group, a nitro group, a cyano group, a phenyl group, an acetyl group, an alkyl group containing 1 to 18 carbon atoms or an alkyloxy group containing 1 to 22 carbon atoms, n₁ and n₂ each represents an integer of 0 to 21, and m₁ and m₂ each represents an integer of 0 to 5.
Synthesis, antimycobacterial activity evaluation, and QSAR studies of chalcone derivatives
作者:P.M. Sivakumar、S. Prabu Seenivasan、Vanaja Kumar、Mukesh Doble
DOI:10.1016/j.bmcl.2006.12.112
日期:2007.3
In order to develop relatively small molecules as antimycobacterial agents, twenty-five chalcones were synthesized, their activity was evaluated, and quantitative structure-activity relationship (QSAR) was developed. The synthesis was based on the Claisen-Schimdt scheme and the resultant compounds were tested for antitubercular activity by luciferase reporter phage (LRP) assay. Compound C-24 was found to be the most active (similar to 99%) in this series based on the percentage reduction in Relative Light Units at both 50 and 100 mu g/ml levels, followed by compound C-21. Four compounds at the 50 mu g/ml and eight compounds at the 100 mu g/ml showed activity above 90% level. QSAR model was developed between activity and spatial, topological, and ADME descriptors for the 50 mu g/ml data. The statistical measures such as r, r(2), q(2), and F values obtained for the training set were in acceptable range and hence this relationship was used for the test set. The predictive ability of the model is satisfactory (q(2) = 0.56) and it can be used for designing similar group of compounds. (c) 2007 Elsevier Ltd. All rights reserved.
‘On water’ synthesis of 2,4-diaryl-2,3-dihydro-1,5-benzothiazepines catalysed by sodium dodecyl sulfate (SDS)
作者:Gaurav Sharma、Raj Kumar、Asit K. Chakraborti
DOI:10.1016/j.tetlet.2008.04.146
日期:2008.6
An efficient synthesis of 1,3-diaryl-2,3-dihydro-1,5-benzothiazepines has been developed by the reaction of various 1,3-diaryl-2-propenones with 2-aminothiophenol in water under neutral conditions catalysed by SDS. Excellent chemoselectivity was observed for substrates possessing halogen atoms or nitro/alkoxy/thioalkyl groups which did not undergo competitive aromatic nucleophilic substitution of the halogen atoms or the nitro group, reduction of the nitro or the a,p-unsaturated carbonyl group, or dealkylation of the alkoxy/thioalkoxy groups. (C) 2008 Elsevier Ltd. All rights reserved.
New, High Efficiency Nonlinear Optical Chalcone Co-Crystal and Structure–Property Relationship
作者:E. D. D’silva、G. Krishna Podagatlapalli、S. Venugopal Rao、D. Narayana Rao、S. M. Dharmaprakash
DOI:10.1021/cg2009539
日期:2011.12.7
In our present study, we attempted to grow the single crystals of (2E)-1-(4-chlorophenyl)-3-[4-(methylsulfanyl)phenyl]prop-2-en-1-one by making use of the slow evaporation solution growth technique at room temperature. But the single crystal X-ray diffraction technique revealed that the grown crystal was a co-crystal with molecular formula C16H13Br0.66Cl0.34OS (4Br4MSP/4Cl4MSP). The presence of functional groups in the molecular structure is confirmed by Fourier transform infrared (FT-IR) spectroscopy. The UV-vis-NIR absorption spectrum shows that this co-crystal has a good transparency window for optical application. Second harmonic generation (SHG) analysis was done to explore nonlinear optical (NLO) characteristics of the material, and the co-crystal was found to have the highest SHG efficiency when compared with all the co-crystals reported in the literature.