Synthesis and biological activity of some new pyrazoline and pyrimidine derivatives
摘要:
New series of pyrazoline 3-aryl-4,5-dihydro-1H-pyrazole-1-carbaldehydes (4-6), (aryl-4,5-dihydro-1H-pyrazol-1-yl) ethanones (9-11) and 3-aryl-4,5-dihydro-1H-pyrazoles (24 and 25) were synthesized by reacting chalcones (1-3) with hydrazine hydrate in either formic acid, acetic acid or ethanol, respectively. Also, new 6-arylpyrimidin-2-amine derivatives (32-34) were synthesized from the same chalcones. The structures of the newly synthesized compounds were established on the basis of IR, H-1 NMR, C-13 NMR, mass spectral data and elemental analyses. The compounds were evaluated for their antibacterial and antifungal activities. Three heterocycles showed relevant activity against C. albicans and some compounds also showed activity against E. coli.
Evaluation of sulphonamide derivatives acting as inhibitors of human carbonic anhydrase isoforms I, II and<i>Mycobacterium tuberculosis</i><b>β</b>-class enzyme Rv3273
作者:Tanvi V. Wani、Silvia Bua、Pravin S. Khude、Abdul H. Chowdhary、Claudiu T. Supuran、Mrunmayee P. Toraskar
DOI:10.1080/14756366.2018.1471475
日期:2018.1.1
chromatography (HPLC). Human (h) carbonic anhydrase (CA, EC 4.2.1.1) isoforms hCA I and II and Mycobacterium tuberculosis β-CA encoded by the gene Rv3273 (mtCA 3) inhibition activity was investigated with the synthesised compounds which showed promising inhibition. The KIs were in the range of 54.6 nM-1.8 µM against hCA I, in the range of 32.1 nM-5.5 µM against hCA II and of 127 nM-2.12 µM against mtCA
isomorphism exist in these crystals. Ib and IIIa adopt a cis configuration with respect to the central CC bond while the other forms exhibit a trans configuration, except for those without single crystal X-ray analysis. Both Ib and IIb have two crystallographically independent molecules in their asymmetrical unit which has not been found in reported chalcone crystals. Those crystals with a cis configuration
A Novel Reaction of the “Huisgen Zwitterion” with Chalcones and Dienones: An Efficient Strategy for the Synthesis of Pyrazoline and Pyrazolopyridazine Derivatives
作者:Vijay Nair、Smitha C. Mathew、Akkattu T. Biju、Eringathodi Suresh
DOI:10.1002/anie.200604025
日期:2007.3.12
US3931152A
申请人:——
公开号:US3931152A
公开(公告)日:1976-01-06
Unraveling relation between nonlinear absorption and structure of push pull ornamented anthracenyl chalcone derivatives
作者:Amrita Saha、Asha Singh、Rama Chari、J. Jayabalan
DOI:10.1016/j.molstruc.2020.128578
日期:2020.11
Using green chemical method a series of fifteen systematically substituted 3-(9-substituted anthracen-10-yl)-1-(4-phenyl substituted)prop-2-en-1-one derivatives having high nonlinear absorption coefficient have been synthesized. The nonlinear absorption properties of these compounds were studied using nanosecond pulses at 532 nm wavelength. All 15 derivatives are found to show high nonlinear absorption in the range of 35-640 cm/GW. Among these the derivatives with-NO2 as one of the substitution group show higher nonlinear absorption. The origin of high nonlinear absorption with low linear absorption in the compounds has been attributed to two-step two-photon absorption process. We have shown that the energy bands of these compounds are distributed such that for excitation at 532 nm they have strong nonlinear absorption. These properties of the reported compounds make them a potential candidate for biological imaging and other applications which are based on nonlinear absorption. (C) 2020 Elsevier B.V. All rights reserved.