Modification of biologically active amides and amines with fluoro-containing heterocycles 5. Fluoro-containing heterocyclic derivatives of 2-amino-1,3,4-thiadiazoles

An approach to modification of biologically active 2-amino-1,3,4-thiadiazoles with fluoro-containing five-membered heterocycles was proposed. The approach involves reactions of imines (generated in situ from 2-amino-1,3,4-thiadiazoles and methyl trifluoropyruvate) with 1,3-binucleophiles such as 6-aminouracils, 6-aminothiouracils, N-substituted 3-aminocyclohexenones, N-substituted ureas, N-substituted benzamidines, and 3-aminocrotononitrile.