Malonic Acid → HCID 58387360, compound

Participants

Reaction Steps

A mixture of 2,4-difluoro-3-hydroxybenzaldehyde (0.255 g, 1.613 mmol) and malonic acid (0.168 g, 1.613 mmol) in pyridine (6 ml) and piperidine (0.06 ml) was heated to reflux for 1 h. All the volatile were removed and the residue was partitioned between NaHCO3 sat. and Et2O. The aqueous phase was acidified with 37% HCl until pH <3 and extracted with AcOEt. The organic layer was dried over sodium sulphate and evaporated to give (E)-3-(2,4-difluoro-3-hydroxyphenyl)acrylic acid (280 mg) as pale a brown solid. The compound was used in the next step without further purification.

Provenance & Evidence