Electronic Effect of Diphosphines on the Regioselectivity of the Palladium-Catalyzed Hydroesterification of Styrene

The electronic character of the diphosphine ligands controls the regioselectivity of the Pd-catalyzed carbonylation of styrene. In the presence of electron-poor phosphines branched esters are produced and high activities of the catalytic systems are observed.双膦配体（diphosphine ligands）的电子特性可调控钯（Pd）催化苯乙烯羰基化反应的区域选择性。当体系中存在缺电子膦配体时，反应将生成支链酯类产物，且该催化体系可观测到较高的催化活性。