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Author: Subject: A Note on the Synthesis of 3-Nitrophthalic Acid
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[*] posted on 26-9-2021 at 02:28

I do not like CrO3 procedure, because it must be performed at the edge of runaway, to obtain any amount of 3-NP acid. At lower temperatures it gives nothing :(
I have always wanted to try catalytic air oxidation of 1-nitronaphtalene in boiling acetic cacid, with Co(III) acetate (and Br as promotor). Realively simple, but somehow I had not time for this....
There is an old article from Berichte or Annalen, about KMnO4 oxidation of 1-nitrotetraline, but as far I remember, exact conditions are not given and final yield is low (>20 %)

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