Trifluoromethylated furans via iodocyclisation of γ-unsaturated ethyl trifluoroacetoacetates
Abstract
Under iodoetherification conditions, γ-unsaturated ethyl trifluoroacetoacetates 1a–c exhibit a specific reactivity. Conditions were found for the synthesis of cyclic iodo hemiketals 2a–c and for their subsequent conversion into either α-trifluoromethylated furans or trifluoromethylated dioxabicyclo[2.2.1]heptanes.