Cyclohexa-2,4- and 2,5-dienones bearing at position 2 or 4 α dihalomethyl group (halogen = chlorine or bromine) are smoothly reduced by tri-butyltin hydride to furnish appropriately substituted tropones. Modification of the substituents permits access to a tropolone and to less substituted tropones. The mechanism of this ring expansion process has been discussed.