SYNTHESIS OF REGIOSELECTIVELY AND STEREOSELECTIVELY SUBSTITUTED BICYCLOOCTENONES BY CARBONYLATION OF CYCLOHEPTADIENE DERIVED IRON CARBONYL-COMPLEXES BEARING ALKYL-ALLYL SUBUNITS

The addition of appropriate nucleophiles to cationic cycloheptadienyl iron complexes of type 7 leads to alkyl-allyl complexes 8. These compo unds can be converted to bicyclic ketones containing a bicyclo[4.1.1]- or a [3.2.1]octenone substructure via oxidative or carbonylative deco mplexation. The methods described provide a systematic access to regio - and stereoselectively mono- and disubstituted bicyclooctenones.