M. Lennartz et E. Steckhan, Synthesis of bicyclic lactams via ring closing olefin metathesis and intramolecular Heck reaction, SYNLETT, (3), 2000, pp. 319-322
The application of the ring closing olefin metathesis and the intramolecula
r Heck reaction as key steps in the synthesis of 6,5-and 7,5-fused enantiom
erically pure bicyclic lactams starting from a chiral pyrrolidone is shown.
The diolefinic cyclization precursors can be obtained by a combined electr
ochemical oxidation- N-acyliminium coupling reaction and a subsequent N-alk
ylation using an unsaturated alkyl bromide.