Formic Acid → Methyl 5-formylpyrrole-3-carboxylate

Participants

Reaction Steps

3.6 g (27 millimoles) of 2-cyanopyrrole-4-carboxylic acid methyl ester, 17 g of Raney nickel, and 450 ml of 75% formic acid are introduced, in a flask, into an oil bath preheated to 120° C. and made to react for one hour. Subsequently, the mixture is poured into 1 liter of ice water and repeatedly extracted with ether. After drying and concentration of the ether phase, 1.4 g (36% of theory) of 2-formylpyrrole-4-carboxylic acid methyl ester is obtained, mp 126° C.

Provenance & Evidence