Ej. Latham et Sp. Stanforth, SYNTHESIS OF INDOLES AND QUINOLONES BY SEQUENTIAL WITTIG AND HECK REACTIONS, Journal of the Chemical Society. Perkin transactions. I, (14), 1997, pp. 2059-2063
Trifluoroacetamido derivatives 18a-c and 19a-c react with phosphorane
2 in-boiling toluene to give the corresponding enamines 12a-c and 13a-
c respectively which are precursors of the trifluoromethylated indoles
14a-c and quinolones 15a-c.