A Kulinkovich Entry into Tertiary <i>N</i>-Acyliminium Ion Chemistry

Abstract

Subjection of N-alkenylimides to Kulinkovich cyclopropanation conditions led to different types of N,O-acetals, which were used as precursors for tertiary N-acyliminium ion chemistry. In this way, a variety of bi- and tricyclic lactams were efficiently synthesized.