SYNTHESIS AND STRUCTURE OF HYDRAZONE DERIVATIVES OF HARMINE

The present paper deals with chemical synthesis based on 8-acetylharmine. It was established thatinteraction of 8-acetylharmine with hydrazine hydrate produces (E)-8-(1-hydrazonoethyl)-7-methoxy-1-methyl-9Hpyrido[3,4-b]indole in a yield of 69%. It was shown, that reaction of (E)-8-(1-hydrazonoethyl)-7-methoxy-1-methyl9H-pyrido[3,4-b]indole with functionally substituted aromatic aldehydes (anisaldehyde, 2-fluorobenzaldehyde,2,4- dimethoxybenzaldehyde) by boiling in methanol leads to the formation of the corresponding Narylidenehydrazones with 56-82% yields. The structure of the synthesized compounds was characterized on the basisof one-dimensional 1H, 13C and DEPT NMR methods, as well as data from two-dimensional COSY, HMQC, andHMBC spectra, elemental analysis and mass spectra. Correlation spectroscopic methods provided information foridentification of three bond protons-protons and one bond protons-carbons correlations COSY (1Н -1Н) and HMQC(1Н13С, 1Н15N). Homo- and heteronuclear interactions, confirming the structures of new derivatives of harmine, aredetermined. The use of modern physicochemical and spectroscopic research methods in the present work allowedreliable and unambiguous characterization of the structure and properties of the obtained compounds.