Malonic Acid → 3-Butenoic acid, 4-phenyl-, (3E)-

Participants

Reaction Steps

To a stirred solution of 2-phenylacetaldehyde (5.0 g, 32.3 mmol) and malonic acid (4.0 g, 38.8 mmol) in pyridine (25.0 mL) was added a catalytic amount of piperidine (0.64 mL, 6.46 mmol) then heated to reflux. After 3 h, the resulting mixture was cooled to room temperature and concentrated under reduced pressure. The crude product was slowly added 2N HCl. The white precipitate was filtered off and dried under vacuum to produce the title compound (3.5 g, 55˜80%)

Provenance & Evidence