Abstract The new ruthenium-sulfonate catalyst Ru (Cp*)(η 3-C 3 H 5)(p-CH 3 C 6 H 4 SO 3) 2,(Cp*= pentamethylcyclopentadienyl), rapidly and regioselectively mono-allylates dimedone to the branched products using substituted allyl alcohols as substrates, without acid, base or other additives, under relatively mild conditions. We consider the ruthenium sulfonate to be a “green” alternative in that it uses allyl alcohols as substrate,(rather than ...
