Abstract Reactions of five acyclic dihalogeno-and trihalogeno ketones, representing the α, α- , α, α′-, α, α, α-and α, α, α′-di-and trihalogeno substitution pattern, with sodium 2, 2, 2- trifluoroethoxide in 2, 2, 2-trifluoroethanol (NaTFE/TFE) in the presence of furan were investigated with the aim of obtaining [4+ 3] cycloadducts of the corresponding oxyallyl intermediates. Preference of Favorskii rearrangement over cycloaddition was observed ...
