Author:
Karkhut A.I., ,Bolibrukh Kh.B.,Khoumeri O.,Vashchenko O.O.,Hubytska I.I.,Bolibrukh L.D.,Polovkovych S.V.,Terme Th.,Vanelle P., , , , , , , ,
Abstract
The cyclocondensation of the bielectrophile 2,3-bis(bromomethyl)-1,4-dimethoxyanthracene-9,10-dione with several heteroyl-benzyl hydrazides with the formation of exofunctionalized tetracyclic quinoid systems was studied. Different numbers of products were isolated by liquid chromatography for different hydrazides. The products were identified as atropisomers. Generally, only one isomer was isolated for N'-(4,6-dimethylpyrimidin-2-yl)benzohydrazide, while two and three isomers were isolated for N'-(6-chloropyridazin-3-yl) benzohydrazide and for N'-(4-chlorophthalazin-1-yl) benzohydrazide, respectively. To determine their structure, modeling of the geometries and NMR spectra by DFT methods was performed. The structure of the obtained isomers was established based on 1H, 13C NMR and NOESY spectra, the results well agree with the simulation results.
Publisher
SHEI Ukrainian State University of Chemical Technology
Subject
Materials Chemistry,General Chemical Engineering,Environmental Chemistry,General Chemistry
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