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Information × Registration Number 0305U005262, 0103U004211 , R & D reports Title Multinuclear partial hudrogenerated azageterocycle s based on carbonil bielectrophiles. The synhesis and research of them. popup.stage_title Взаємодія похідних 2-імінокумарину з карбонідбними сполуками Head Orlov V., Registration Date 22-08-2005 Organization Kharkov national university named after V.N. Karazin popup.description2 Methods for synthesis of 2-iminocoumarins are given in the thesis as well as methods for modifications of these heterocycles by reactions with nucleophiles and electrophiles. It is found that 2-iminocoumarin-3-carboxamides under high temperature undergo recyclization into 3-cyanocoumarins in solvents where efficient hydrogen transition is possible. In the protocols conditions, the side recyclization of starting 2-iminocoumarin-3-carboxamides into 3-cyanocoumarins dos not occur. A comprehensive study of diverse 2-iminocoumarins reactivity in reactions with acetic anhydride is carried out. It is shown that a free iminogroup is readily acetylated. However, if 2-iminocoumarin molecules contain also a hydroxygroup, the primary acetylation occurs at this group. A correlation analysis of chemical shifts of imin and amide protons as well as C-H proton at 4-position in 2-aryliminocoumarin-3-carboxamides is carried out. As a result, it is shown that intramolecular hydrogen bond of starting 2-aryliminocoumarin-3-carboxamides plays a key role in transition state stabilization in the amide group acetylation.. It is found that the interaction of 3-(benzimidazolyl-2)-2-iminocoumarins with aromatic aldehydes dependently on nature of substituents presented in the starting compounds leads to 3-(benzimidazolyl-2)coumarins or -aryl-7H-benzo[4,5]imidazo[1,2-c]benzopyrano[3,2-e]pyrimidines. . The compounds synthesized in the thesis are studied by elemental analysis, NMR, IR and electronic spectroscopy. The luminescence and lasing characteristics of the obtained -aryl-7H-benzo[4,5]-imidazo[1,2-c]benzopyrano[3,2-e]pyrimidines, containing donor substituens in position 3 are studied. Product Description popup.authors popup.nrat_date 2020-04-02 Close