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Some different substituted 4-methylquinolin-2(1H)-ones have been synthesized by closing corresponding (un)substituted acetoacetanilides in the presence of ionic liquid [Bmim]OH. Obtained quinolines were converted to its 2-chloro derivatives by reaction with POCl3. Some compounds of substituted tetrazolo[1,5-a]quinolines were synthesized by reacting these 2-chloro derivatives with sodium azide in DMF as solvent. The structures of obtained compounds have been confirmed using spectroscopic methods (IR, NMR and MS).

The Study on synthesis and transformations of some of substituted 4-methylquinolin-2(1H)-ones