The [3, 3] sigmatropic rearrangement of allyl vinyl ethers provides a versatile method for the construction of new carbon to carbon bonds with high regio-and stereospecificity under mild reaction conditions. 2 Although the [3, 3] sigmatropic rearrangement of allyl phenyl ethers is well examplified in the classic Claisen rearrar~ gement,~ the [3, 3] sigmatropic rearrangement of benzyl vinyl ethers 1 (W= H) is not generally
