Synthesis of Fluorinated Dienylic Stannanes Via the Wadsworth-Emmons Reaction

Abstract Geminal difluorination of dithiolane 9 affords bis benzyl ether 4b which is converted to beta-fluoroenals 3Z/3E. Reaction of these enals with the stannylmethyl Wadsworth-Emmons reagent 2 produces dienyl esters 14Z/14E which are converted to highly functionalized dienylic stannanes 1Z and 1E.