Pd-Catalyzed Rearrangement Reaction of -Tosylhydrazones Bearing Allyl Ethers Into -Olefin-Substituted Sulfonylhydrazones.

A novel and efficient rearrangement of -tosylhydrazones bearing allyl ethers into -olefin-substituted sulfonylhydrazones is proposed. The reaction involves breakage of the C-O bond and formation of the C-N bond. The reaction can be extended to a wide range of substrates, and the target products can be synthesized smoothly, regardless of the presence of electron-donating and electron-withdrawing groups. The proposed strategy is a new direction in the field of rearrangement reactions.