(E)-methyl 4-(2-(dimethylamino)vinyl)-3,5-dinitrobenzoate → Methyl 4-amino-1H-indole-6-carboxylate

Participants

Reaction Steps

To a solution of methyl 4-[(E)-2-(dimethylamino)ethenyl]-3,5-dinitrobenzoate (D200) (10 g, 34 mmol, 1 equiv) in MeOH (250 ml) was added 10% palladium on charcoal (50% wet, 1.0 g, 5% w/w) and the resulting mixture was stirred under an atmosphere of hydrogen for 7 h. The catalyst was removed by filtration through a pad of celite and the solution concentrated in vacuo. The residue was triturated with AcOEt/iso-hexane to give methyl 4-amino-1H-indole-6-carboxylate (D201) (5 g, 77%) as a dark pink solid. [M+H]+=191.0, RT=1.20 min.

Provenance & Evidence