Cyclopentanones 3 and 7 are generated in a one-pot procedure from allyl vinyl ethers 1 and diallyl ethers 4, respectively. The conversion is carried out in the presence of RhCl(cod)(dppe) or RuCl2(PPh3)3 at elevated temperatures and involves a sequence of aliphatic Claisen rearrangement and intramolecular hydroacylation of the pent-4-enals generated as intermediates. The diallyl ethers 4 undergo an additional double-bond isomerization prior to the Claisen rearrangement.