Page 1. Tetrahedron Letters,Vol.27,No.Z6,pp 2985-2988,1986 0040-4039/86 $3.00 + .OO Printed in Great Britain Pergamon Journals Ltd. INFLUENCE OF THE LEWIS ACID ON THE NUCLEOPHILIC ADDITION TO p$-DISUBSTITUTED a-ENONES. M. Zervos and L. Wartski Laboratoire des Carbocycles, associe au CNRS, Universite de Paris-Sud Bat. 420, 91405 ORSAY CEDEX (France). ...