What is the product when naphthalene is oxidized by alkaline (or acidic) solutions of $\ce{KMnO4}$?

Some possible reactions show up in a google search, but they have no references:

  1. Naphthalene to phthalic acid by alkaline $\ce{KMnO4}$:
  2. Another product on oxidation of napthalene by alkaline $\ce{KMnO4}$:

If possible, please include the reaction mechanisms in the answer as well.

  • 1
    $\begingroup$ Quick search on Reaxys shows that both the products you've already listed have been made, also plus 2-formylbenzoic acid. Some are from 19th-century Chem. Ber. articles, which I'm not inclined to look up. $\endgroup$ – orthocresol Jan 19 '18 at 21:45
  • $\begingroup$ @orthocresol , Is there a reaction mechanism? If not, can you post this as answer? $\endgroup$ – Shoubhik R Maiti Jan 21 '18 at 10:00
  • $\begingroup$ will the 2nd reaction happen? As far as i know, the 2nd reaction will only happen to triple bonds. $\endgroup$ – ICHO aspirant Jul 7 at 14:35

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