Regiospecific alkenylation of phenols by 1,1-dimethylallene promoted by platinum catalysts
Abstract
1,1-Dimethylallene reacts with phenolic substrates in the presence of catalytic amounts of platinum(II) complexes. A regiospecific C-alkenylation takes place, affording o-isopentenylphenols and 2,2-dimethylchromans. Possible reaction mechanisms are also discussed.