with and without incorporation of H218O, the pathway was concluded to be initiated by palladium metal catalyzed partial hydrogenation of the phenyl group to an enol ether. Water then rapidly adds to the enol ether to form a hemiacetal, which then undergoes elimination to cyclohexanone and phenol/alkanol products. A remarkable feature of the reaction is that the stronger Ph−O bond is cleaved rather than
在相对温和的温度和H 2压力下,
金属
钯表面在促进芳族醚在
水相中的还原
水解方面具有很高的选择性。在定量转化时,观察到PhOR醚对
水解产物的选择性范围为50%(R = Ph)至大于90%(R = n- C 4 H 9,环己基和PhCH 2 CH 2)。通过分析加入和不加入H 2 18的产物的演变○,该途径被认为是由
钯金属催化的苯基部分氢化为烯醇醚引发的。然后将
水快速加入到烯醇醚中,形成
半缩醛,然后将其消除为
环己酮和
苯酚/链烷醇产物。该反应的显着特征是,更强的Ph-O键被裂解,而不是较弱的脂族O-R键被裂解。