摘要:
Insertion of iron carbonyl into the four-membered ring of alpha-pinene produces a versatile iron complex exhibiting an iron-carbon sigma-bond. Reaction of this complex with various reagents, i.e. dimethyl butynedioate, produces the bicyclic ketones 2, 7, and 8 with moderate to high regioselectivity and full conservation of the optical purity of the starting terpene.