A new cyclopentadiene and its use as a ligand for catalytically active rhodium complexes

Article abstract of DOI:10.1016/0022-328X(94)00020-D

Dimethyl 4-methoxycarbonylcyclopenta-1,3-diene-1,2-diacetate has been prepared from benzyl methyl malonate by reaction with 2-propynyl bromide, followed by palladium-catalyzed ring-forming oxidative carbonylation and by elimination of the benzyloxycarbony