Butanal → HCID 19610404, compound

Participants

Reaction Steps

To a solution of KOH pellets (0.4 g, 7.1 mmol) in H2O (5 ml), indole-2-carboxaldehyde (0.5 g, 3.44 mmol) in EtOH (45 ml) was added. After cooling to 0° C. butyraldehyde (0.31 ml, 3.44 mmol) was added and the reaction mixture was stirred at room temperature for 12 h. The ethanol was removed under vacuum and the aqueous solution was adjusted to pH 5 and extracted with EtOAc (3×10 ml). The combined organic layers were washed with brine (10 ml), dried over Na2SO4 and evaporated under vacuum. The residue was purified by flash-chromatography (hexane/EtOAc 7:3) to afford, after trituration with isopropyl ether, 0.3 g (44%) of the title compound.

Provenance & Evidence