π-Allylpalladium Complexes in Synthesis: An Update

This review aims to summarize the development of the chemistry of π-allylpalladium complexes both as intermediates and catalysts/reagents between 2013 and early 2109. Major attention has been devoted to the synthetic aspect of these versatile intermediates. 1 Introduction 2 π-Allylpalladium Complexes Generated from Allyl Electrophiles 2.1 Activated Allylic Compounds 2.2 Unactivated Allylic Compounds: Allylic Alcohols and Hydrocarbons 2.3 Total Syntheses 3 π-Allylpalladium Complexes Generated from Dienes 3.1 Conjugated Dienes 3.2 Allenes 4 π-Allylpalladium Complexes Exploited as Reactants and Precatalysts 4.1 Allylpalladium-Catalyzed Dehydrogenation 4.2 Allylpalladium-Catalyzed Synthesis of Alkenylboronic Esters 4.3 Allylpalladium-Based Precatalysts 5 Conclusions