The [2,3]-Wittig rearrangement of silyl enolates generated from alpha-allyloxy ketones proceeded smoothly in DMF by the promotion of a catalytic amount of metal alkoxides Such as sodium benzylate to afford the corresponding rearrangement product in good yields at room temperature, which indicated that the oxygen anion initially formed in the above product effectively catalyzed the [2,3]-Wittig rearrangement as a Lewis base.