Ej. Latham et Sp. Stanforth, SYNTHESIS OF INDOLES AND QUINOLONES BY SEQUENTIAL WITTIG AND HECK REACTIONS, Chemical communications, (19), 1996, pp. 2253-2254
N-Trifluoroacetylanilines 6 and 7 undergo a Wittig reaction with phosp
horane 2 (R = Et) giving enamine derivatives 9 and 10 respectively whi
ch are precursors to indoles 4 and quinolones 5.