An enantiomerically pure tricyclic isoindoline system by cyclisation of tricarbonyl[η6-(R)-N-cyanomethyl-4-phenyloxazolidine]chromium

Article abstract of DOI:10.1016/0040-4039(96)00520-5

The isolation of isoindoline 4 by oxidative trapping indicates that a tricyclic η⁵ complex is a contributing form of the anion derived from the title compound 3.