Synthesis and properties of (O-acyl imidato)carbene complexes of chromium, molybdenum, and tungsten

Article abstract of DOI:10.1021/om00111a015

A number of (O-acyl imidato)carbene complexes of chromium, molybdenum, and tungsten were prepared by the acylation of aminocarbenes or by the reaction of acetoxycarbenes with amides. These relatively unstable complexes had unusual spectroscopic properties and underwent thermal reactions with imines to give low yields of 3-azetidinones. Two amido chromium carbene complexes were also prepared. These were quite unstable, resembling acetoxycarbenes, and readily decomposed. An (N-carbobenzoxy-amino)carbene was also prepared. It was the most stable of these carbenes and underwent reactions typical of aminocarbene complexes.