Hydrochloric Acid → 4-(2-Methyl-cyclopentylamino)-3-nitro-benzoic acid methyl ester

Participants

Reaction Steps

To a solution of 9.32 g of 4-fluoro-3-nitro-benzoic acid methyl ester in 30 ml of abs. DMF was added 16.47 g of potassium carbonate, followed by 5.00 g of 2-methyl-cyclopentylamine. After 16 h at rt, the mixture was poured into water, the pH was adjusted to 5 by the addition of 2 M aqueous hydrochloric acid, and the reaction mixture was extracted with ethyl acetate three times. The combined organic phases were washed with water, dried over sodium sulphate and concentrated to yield 12.74 g (100%) of 4-(2-Methyl-cyclopentylamino)-3-nitro-benzoic acid methyl ester.

Provenance & Evidence