[reaction: see text] Intramolecular cyclizations of a series of (E)- and (Z)-olefinic acyclic ketone-derived N-acyliminium ions have been studied. It has been found that both the course of the reaction and the stereochemistry of the products are critically dependent upon the tether length and olefin geometry of the cyclization substrate.
[反应:见正文]已经研究了一系列(E)和(Z)-烯烃无环酮衍生的N-酰基
亚胺离子的分子内环化。已经发现,反应过程和产物的立体
化学都严格取决于环化底物的系链长度和烯烃几何形状。