... Abdelkebir JELLAL, Jean-Pierre ZAHRA and Maurice SANTELLI Laboratoire Associau CNRS n109, Centre de St--Je, Rue Poincar 13397 MARSEILLE Cedex 13 - France ... Hydrolysis of the enolate _13 gives the acetylenic acyl cyanide 4. Analogous mechanisms have been proposed for the 1,4-addition reaction of allenyl silanes to enones (11) or ethylenic acyl cyanides (1). REFERENCES and NOTES 1 A. JELLAL and M. SANTELLI, Tetrahedron Lett., 1980 ...