A direct route to 1-aryl-4-(trifluoromethyl)penta-1,3-dienes is described using the Wittig-Horner reaction of diethyl (3-(trifluoromethyl)-but-2-enyl)phosphonate anion with aromatic aldehydes or trifluoracetophenone.
NAGAI, TAKABUMI;HAMA, MASAYOSHI;YOSHIOKA, MASAHIKO;YUDA, MARIKO;YOSHIDA, +, CHEM. AND PHARM. BULL., 37,(1989) N, C. 177-183