Efficient Synthesis of HighlyFunctionalized Triquinane Derivatives through Dicobalt Octacarbonyl-CatalyzedCycloaddition of Diyne with Diene under Carbon Monoxide Followedby Cleavage of a Double Bond

A new approach to the synthesis of angular triquinanes, based on the dicobalt octacarbonyl-catalyzed tandem cycloaddition of diyne and diene followed by cleavage of a double bond, is described.