Palladium-catalyzed polyene cyclizations of trienyl triflates

Synthese de derives d'hexahydro methylene-3 spiro [cyclopentane-1:1'-indenone-4] ou spiro [cyclohexane-1:1'-indenone-4'] a partir de dimethoxy-2,4 cyclohexadiene-1,4, de la trifluoro methanesulfonamide et d'iodo-2' ethyl-6 heptadiene-1,4