Allyl bromide → 3-(Prop-2-en-1-yl)benzaldehyde

Participants

Reaction Steps

The ethylene acetal of 3-bromobenzaldehyde (10 g) is converted into the Grignard reagent by reaction with magnesium (1.13 g) in dry THF (ca. 250 ml). Cuprous bromide (0.9 g) is added and the mixture is cooled in cardice. Allylbromide (8.52 g) in dry THF is then added and the mixture is stirred overnight following which saturated ammonium chloride is added, the mixture is extracted with diethyl ether (3 times), the ether extract is washed, dried and the solvent evaporated to yield the crude ethylene acetal of 3-allylbenzaldehyde (8 g).

Provenance & Evidence