Novel transition metal free oxidation of aromatic aldehydes to carboxylic acids using N-methylpyrrolidin-2-one hydrotribromide (MPHT) as catalyst and hydrogen peroxide as oxidant

N-Methylpyrrolidin-2-one hydrotribromide (MPHT) was found to be an efficient catalyst for the oxidation of various aromatic aldehydes to carboxylic acids using aq. hydrogen peroxide as oxidant in excellent yields under mild reaction conditions.