1H-Pyrrolo[2,3-b]pyridine-3-carbaldehyde → HCID 54004801, compound

Participants

Reaction Steps

A solution of 3-formyl-7-azaindoie (1.46 g, 0.010 mol) and 2-oxindole-5-sulfonic acid (2.55 g, 0.012 mol) in absolute ethanol (10 ml) was heated to reflux for 1 h. The reaction mixture was chilled with ice water, the precipitate filtered, the residue washed with ice-cooled ethanol and dried under vacuum. Almost pure titie compound was obtained in about 70% yield (2.389 g).

Provenance & Evidence