New type of 1,3-molecular rearrangement of substituted-vinyl alkoxymethyl ethers and its application to synthesis of 1(or 3)-substituted 4-alkoxybutan-2-ones
New type of 1,3-molecular rearrangement of substituted-vinyl alkoxymethyl ethers and its application to synthesis of 1(or 3)-substituted 4-alkoxybutan-2-ones