Allyl derivatives of zearalenone

The Claisen rearrangement of 4-O-allylzearalenone led to only one principal product, which was identified as 3-allylzearalenone with the aid of photochemical isomerization and PMR spectroscopy. This general method is useful for distinguishing 3-substituted zearalenone isomers from 5-substituted isomers. Hydrogenation of 3-allylzearalenone gave 3-(1-propyl)zearalanone.