HClO4 catalysed aldol-type reaction of fluorinated silyl enol ethers with acetals or ketals toward fluoroalkyl ethers
2019
A highly efficient metal-free aldol-type reaction of various acetals or ketals with fluorinated silyl enol ethers catalysed by less than 1 mol% HClO4 (70% wt., aq.) is developed. This provides expedient access to a wide array of valuable fluoroalkyl ethers featuring a ketone carbonyl functionality in good to excellent yields (40 examples). Furthermore, thus obtained adducts are readily elaborated into other fluorine-containing alkyl ethers with rich structure.
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