A Novel Synthesis of Trifluoromethylated Multi-Substituted Alkenes via Regio- and Stereoselective Heck Reaction of (E)-4,4,4-Trifluoro-1-phenyl-2-buten-1-one

Treatment of (E)-4,4,4-trifluoro-1-phenyl-2-buten-1-one with various aryldiazonium salts in the presence of a palladium catalyst led to a smooth Heck reaction, furnishing α-arylated adducts in good yields.