[heisenberg1891989]

what will be the final product if cyclopentanone is first treated with m-CPBA, and then the product obtained is further treated with selenium dioxide .. well i get that when cyclopentanone is treated with m-CPBA then the product will be a lactone, well i dont know its name.. but i can't understand what will be the next product when this lactone will be treated with selenium dioxide .. so please help sir if u can..

[Hunter2]

You get valeroyllactone . Regarding Seleniumdioxide look Riley oxidation.

http://www.columbia.edu/cu/chemistry/groups/synth-lit/NR/2008_08_15-PVadola-Riley.pdf