Ruthenium-catalysed [2+2] cross-addition of norbornene derivatives and dimethyl acetylenedicarboxylate. A novel route to the exo-tricyclo[4.2.1.02,5]nonene system
Abstract
[H2Ru(PPh3)4] catalyses the [2+2] cross-addition of norbornene derivatives and dimethyl acetylenedicarboxylate to give exo-tricyclo[4.2.1.02,5]nonenes.