Abstract
Background: Ketenium ions are rarely used in chemical synthesis, despite a strong potential and their high reactivity, which can be mostly attributed to their difficult generation. There is therefore an important need for efficient methods enabling their in situ generation from stable and readily available starting materials in order to fully exploit the unique reactivity of ketenium ions. Keywords: Ynol ethers, ketenium ions, electrophilicity, bistriflimide, heterosubstituted alkynes, reactive intermediates.
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