Water → HCID 54123959, compound

Participants

Reaction Steps

Boron tribromide (2.5 ml) was added to a stirred suspension of 6-[2-(4-methoxyphenyl)ethenyl]-4-oxo-4H-pyran-2-carboxylic acid (1.4 g) in methylene chloride (140 ml) and the mixture was stirred for 3 hours at room temperature and 1 hour under reflux. Water (30 ml) was added to the stirred mixture and the solid product was crystallised from ethanol-water to give the title product (mp 256° C. with decomposition).

Provenance & Evidence