Hydrochloric Acid → HCID 1777704, compound

Participants

Reaction Conditions

Reaction Steps

The synthesis was performed with reference to the known literature (International Patent Publication WO1998/30556). A solution of 6-hydroxybenzofuran-3(2H)-one (2.0 g, 13 mmol) and 1H-indole-3-carboxaldehyde (2.3 g, 16 mmol) in ethanol (100 mL) was added with concentrated hydrochloric acid (10 mL), and the mixture was stirred at 75° C. for 5 hours. The reaction mixture was cooled to room temperature, and then the solid was collected by filtration, and washed with methanol and water to obtain (Z)-2-[(1H-indol-3-yl)methylene]-6-hydroxybenzofuran-3(2H)-one (3.8 g, 100%).

Provenance & Evidence