Synthesis,Characterization and Crystal Structure of Some Novel 1‐(3,5‐Dimethyl‐1H‐pyrazol‐1‐yl)‐3‐(substituted anilino)propan‐1‐ones

Michael addition of some substituted anilines to methyl acrylate in acidic medium afforded the methyl 3‐(substituted anilino)propionates ( 1a – 1i ), which on treatment with hydrazine hydrate in methanol were converted into corresponding 3‐(substituted anilino) propionohydrazides ( 2a – 2i ) in good yields. Microwave irradiation of the latter with pentane‐2,4‐dione afforded 1‐(3,5‐dimethyl‐1H‐pyrazol‐1‐yl)‐3‐(substituted anilino)propan‐1‐ones ( 3a – 3i ) under solventless conditions. The structures were confirmed by spectroscopic data, elemental analyses and in case of the 3h by single crystal X‐ray diffraction data.