An unusual for Pd catalysts dehydration of α-alkyl and α, α′-dialkylbenzyl alcohols PhCR′R″OH (R′ = H, Me, Et, Bu; R″ = H, Me) occurs in the presence of the palladium(I) cluster [Pd4(CO)4(OAc)4] (1) in an inert atmosphere to form ethers PhCR′R″-O-CR′ R″ and water. The catalyst is an intermediate of cluster 1 reduction to Pd black, while neither the starting cluster 1, nor Pd black, which is the decomposition product, are active in the catalysis of this reaction.
一种对于Pd催化剂而言不寻常的脱
水反应,即α-烷基和α,α′-二烷基
苄醇PhCR′R″OH(R′=H、Me、Et、Bu;R″=H、Me)在惰性气氛中与
钯(I)簇合物[Pd4(CO)4(OAc)4](1)共存时,会生成醚PhCR′R″-O-CR′R″和
水。该催化剂是簇合物1还原为Pd黑的过程中的中间体,而无论是起始的簇合物1还是其分解产物Pd黑,都不具有催化此反应的活性。