Hydrochloric Acid → 5-tert-butyl-3-nitro-1H-pyrrole-2-carboxylic acid

Beteiligte Stoffe

Reaktionsbedingungen

Reaktionsschritte

A solution of LiOH monohydrate (0.083 g, 2.0 mmol) in water (1 mL) was added to a solution of methyl 5-tert-butyl-3-nitro-1H-pyrrole-2-carboxylate (0.150 mL, 0.66 mmol) in THF:MeOH (3:1, 3 mL) and the resulting mixture heated at 75° C. for 5 hours. The reaction was cooled down to room temperature and acidified with 1N aqueous HCl, extracted with ethyl acetate. The combined organic layers were dried, the solvent eliminated under vacuum and the crude product recrystallized from dichloromethane:hexane to afford 90 mg of expected 5-tert-butyl-3-nitro-1H-pyrrole-2-carboxylic acid as a yellow solid.

Herkunft & Nachweise