Download full text in PDF Opens in a new window. Article suggestions will be shown in a dialog on return to ScienceDirect. ... Please enable JavaScript to use all the features on this page. ... Laboratoire de Chimie Organique de Synthèse, Université Catholique de Louvain, Place L. Pasteur, 1, B-1348 LOUVAIN-LA-NEUVE, Belgium. ... The new activated 2-aza-1, 3-dienes are readily prepared by acylation of N-trimethylsilylimines . They react with electrophilic ...