Synthesis and structure of new 3-pyrazolinylcoumarins and 3-pyrazolinyl-2-quinolones
作者:V. F. Traven、A. V. Manaev、I. V. Voevodina、I. N. Okhrimenko
DOI:10.1007/s11172-008-0195-4
日期:2008.7
The reactions of substituted 3-cinnamoyl-4-hydroxycoumarins and 3-cinnamoyl-4-hydroxy-2-quinolones with different phenylhydrazines gave 3-hetaryl-1H-4,5-dihydropyrazoles. The product structures were studied by 1H NMR spectroscopy and mass spectrometry. 4-Hydroxy-3-pyrazo-linylcoumarins exist in DMSO as two tautomers (4-enol and chromane-2,4-dione), while 4-hydroxy-3-pyrazolinyl-2-quinolones exist only in the enol form.
2-Quinolone and coumarin polymethines for the detection of proteins using fluorescence
作者:Vladyslava B. Kovalska、Kateryna D. Volkova、Alexander V. Manaev、Mykhaylo Yu. Losytskyy、Igor N. Okhrimenko、Valery F. Traven、Sergiy M. Yarmoluk
DOI:10.1016/j.dyepig.2009.07.009
日期:2010.2
A series of novel, polymethine chalcone dye - 2-quinolone derivatives and their boron difluoride complexes were synthesized. The spectral-luminescence properties of a series of 2-quinolones and their coumarin analogues were characterized in the presence of a denaturing agent (sodium dodecyl sulfate), native bovine serum albumin as well as a combination of serum albumin and sodium dodecyl sulfate. A study of the influence of the BF(2)-ether group on the sensitivity of the polymethine dyes to proteins revealed that three of the dyes, namely two hydroxyquinoline dyes containing a 4-diethylamino-2-hydroxyphenyl substituent and a coumarine dye that contained an indolenine substituent, displayed high emission and bright fluorescence (quantum yield <= 0.27) and thus offer promise for use in protein detection. (C) 2009 Elsevier Ltd. All rights reserved.