Thermal Reactions of Chromium Aminocarbene Complexes with Alkynes. Synthesis of Bicyclo Lactams

Article abstract of DOI:10.1021/jo00267a005

((Dimethylamino)methylene)chromium pentacarbonyl underwent thermal reaction with internal alkynes to produce coordinated enaminoketenes.In situ reaction of these with imines produced novel bicyclo<3.1.0> lactams rather than the expected <2 + 2> or <4 + 2>