A one pot synthesis of α-trifluoromethyl unsaturated acids and derivatives via a [3,3]-sigmatropicrearrangement of allyl (or propargyl) fluorovinyl ethers is described.
A one pot synthesis of alpha-trifluoromethyl unsaturated acids via a [3,3]-sigmatropic rearrangement of allyl (or propargyl) fluorovinyl ethers is described. By proto- and iodolactonization. these acids lead to the corresponding trifluoromethylated lactones. (C) 2002 Elsevier Science B.V.. All rights reserved.