(Triphenylphosphoranylidene)acetaldehyde → 5-Cyano-2-hydroxycinnamaldehyde

Participants

Reaction Steps

A solution of 5-cyano-2-hydroxybenzaldehyde (4.3 g) and (triphenylphosphoranylidene)acetaldehyde (9.4 g) in toluene (150 ml) was stirred at 70° C. for 2 hours. The reaction mixture was concentrated in vacuo. The residue was purified by chromatography on a silica gel column using dichloromethane/ethyl acetate=3/1 as an eluant to give the desired compound (2.3 g, yield 44%) as a colorless solid.

Provenance & Evidence