Abstract
The preparation of an annulated verbenyl indene is described. Reduction of the verbenone oxo group and water elimination provided a verbenylindene with an embedded fulvene unit, which was reduced to an annulated verbenylindene, a fluorene derivative. The ansa‐bridge was constructed between the fluorene 9‐position and 6,6‐dimethylfulvene by way of the lithiated indene. Dilithiation of the ligand and treatment with ZrCl4 yielded the corresponding zirconocene.
Acknowledgment
We thank Dirk Petersen at the Department Chemistry, University of Oslo, for the NOESY experiments, which led to the assignment of structure 8 for the zirconation product.