A Remarkable Access to γ-Fluoroalkylated Propargylamine Derivatives or Fluoroalkylated Dihydroisoxazoles via the Reaction of Fluoroalkylated Acetylides with Various Nitrones

Abstract

The reactions of fluoroalkylated acetylides with various nitrones were investigated. When nitrones with an alkyl substituent were employed, hydroxylamines were obtained in high yields, and smooth dehydroxylation followed, to give the corresponding propargylamines. Nitrones with an aryl substituent underwent nucleophilic addition and subsequent intramolecular cyclization, affording the corresponding fluoroalkylated dihydroisoxazoles in moderate yields. These sequences were also extended to chiral versions.

Key words

fluorine-containing compounds - propargylamines - nitrones - amines - heterocycles

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