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The article describes the synthesis of new modifications of derivatives of 6-phenyl-, 6-piodophenyl- and 6-p-bromophenylimidazo[2,1-b][1,3,4]-thiadiazoles - N -((6-(4-iodophenyl)-2-R-imidazo[2,1-b][1,3,4]-thiadiazol-5-yl)methyl)-alkyl/ heterylamine based on the Mannich reaction, bromination 2((ethylsulfonyl)methyl)-6-phenylimidazo[2,1-b][1,3,4]-thiadiazole and the structure of the resulting compounds was established on the basis of IR spectroscopy. It was shown that the presence of substituentsdoi:10.31618/essa.2782-1994.2021.1.68.15 fatcat:ao2zxgowmzgkdd4hkeh5clvygq