Transition-Metal-Free Synthesis of Ynol Ethers and Thioynol Ethers via Displacement at sp Centers: A Revised Mechanistic Pathway

摘要

We present here valuable extensions to our previous work in preparing highly functionalized, heteroatom-substituted alkynes via displacement at an sp center. Our results show that a wide range of ynol ethers can be prepared by the same methodology and that the same protocol can be applied to the synthesis of synthetically useful thioynol ethers. We also present new observations that have led us to revise our original hypothesis in favor of a pathway involving radical intermediates.