Heterocycles p. 2122 - 2136 (2014)
Update date:2022-08-05
Topics:
Miyagi, Kotaro
Moriyama, Katsuhiko
Togo, Hideo
A variety of 2-arylbenzofurans were obtained in good yields by the O-arylation of oximes with diaryliodonium triflates, followed by the treatment with HCl in dioxane under warming conditions through the [3,3]-sigmatropic reaction. The present reaction is one-pot transition metal-free method for the preparation of various 2-arylbenzofurans from oximes, which are easily available from the reaction of alkyl aryl ketones with hydroxylamine.
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