The palladium catalyzed hydroesterification of acenaphthylene takes place through a “hydride” mechanism, that is, through the selective cis insertion of the olefin into the palladium–hydride bond, an obvious prerequisite for the successful development of an enantioselective version of the reaction; however, a degenerate substitution equilibrium between Pd0Ln and the PdII-alkyl species, involving the inversion of the alkyl carbon, is also operative producing a detrimental effect in the enantioselectivity of the reaction.
钯催化的
苊氢化酯化反应是通过“
氢化物”机制进行的,即通过将烯烃选择性顺式插入
钯-
氢化物键中,这是成功开发对映选择性反应的明显先决条件;然而,Pd0Ln 和 PdII-烷基之间的简并取代平衡(涉及烷基碳的反转)也会对反应的对映选择性产生有害影响。