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L. G. Samsonova N. I. Selivanov R. M. Gadirov V. V. Ishchenko O. V. Khilya 《Journal of Structural Chemistry》2007,48(4):782-788
The luminescence spectral properties of 3-pyridyl-7-hydroxy-2-iminocoumarin and 3-(2-methylthiazole)-7-hydroxy-2-iminocoumarin were studied in ethanol solutions at different values of pH and also in other solvents differing in polarity. In their ethanol solutions, the compounds can exist as neutral molecules, anions, cations, and zwitterions. The spectral properties and geometry were studied for all possible forms of these compounds by the INDO/S quantum-chemical method. 相似文献
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A new approach to synthesis of a series of 3-carboxamidine iminocoumarins derivatives and substituted benzopyrano[2,3-d]pyrimidines was developed. The chemical structure of all the compounds was investigated by infrared, 1H NMR, 13C NMR, mass, and elemental analysis. The anticholinesterase activity of compound 12 was evaluated according to the modified Ellman’s method. 相似文献
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The Knoevenagel reaction between 2-hydroxybenzaldehydes and active methylene compounds (malononitrile and ethyl cyanoacetate) produces iminocoumarins and/or coumarins. In order to study the reactivity of the prepared iminocoumarins, chlorination and reaction with N-nucleophiles were studied. 相似文献
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