Question: do alkynes react with kmno4?
Answer: Oxidation. Alkynes are oxidized by the same reagents that oxidize alkenes. Disubstituted alkynes react with potassium permanganate to yield vicinal diketones (Vic‐diketones or 1,2‐diketones) or, under more vigorous conditions, carboxylic acids. Ozonolysis of an alkyne also leads to carboxylic acid formation.