The conversion of N,N-dimethylcathinone into propiophenone would likely require several chemical transformations, as these compounds are structurally different. N,N-Dimethylcathinone is a substituted cathinone with a methylenedioxy phenyl group, while propiophenone is an aromatic ketone. Below is a simplified overview of potential steps for such a conversion. Note that each step may require specific conditions, reagents, and catalysts:
1.


