Abstract
The title compound 2 - prepared by Komblum reaction - reacted with Hg(II)-edta in a two electron withdrawal to a bicyclic compound 6, which showed in solution an equilibrium of two species probably of diastereomers, which was deduced from NMR-measurements. Additionally, resulting of an threefold dehydrogenation two diastereomeric bicyclic lactams 11A and 11B were isolated.