Ammonium formate → 3-[5-(4-aminophenyl)-1-(4-carbamoyl-2-methylphenyl)-1H-pyrrol-2-yl]propanoic acid ethyl ester

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Reaction Steps

3-[1-(4-carbamoyl-2-methyl-phenyl)-5-(nitro-phenyl)-1H-pyrrole-2-yl]-propanoic acid ethyl ester (83 mg, 0.2 mmol) was dissolved in 2 mL methanol under an inert atmosphere of nitrogen. To this solution was added ammonium formate (117 mg, 1.8 mmol) and 10% Pd/C (10 mg). After 24 hrs, the reaction mixture was filtered using celite, rinsed with MeOH and concentrated in vacuo. The residue was diluted with acetone, filtered and the filtrate concentrated in vacuo to give the crude product, which was purified using preparative TLC (solvent: 5% IPA/CH2Cl2). The band corresponding to 3-[5-(4-aminophenyl)-1-(4-carbamoyl-2-methylphenyl)-1H-pyrrol-2-yl]-propanoic acid ethyl ester (Rf=0.6) was isolated and dried under high vacuum (36 mg, 77%, light orange hydroscopic powder).

Provenance & Evidence