Application
Allylpalladium(II) chloride dimer, a yellow powder with the formula [(η3-C3H5)PdCl]2, serves as a pivotal catalyst in organic synthesis, notably recognized for its role in various transition metal allyl complex reactions. It is extensively used in the Heck reaction, facilitating the formation of cyclopentadienyl allyl palladium when reacting with cyclopentadienyl anion. This compound acts as a precatalyst in numerous processes, including asymmetric and cross-coupling catalysis, contributing to the synthesis of 1,4-diallyl-1,2-dihydroisoquinolines and enabling greener Buchwald-Hartwig coupling reactions. Additionally, it plays a key role in the formation of cationic palladium catalysts and the preparation of heterocyclic carbene-palladium-η3-allyl chloride complexes, utilized in efficient Suzuki-Miyaura cross-coupling reactions. As a catalyst, it is instrumental in the silylation of organobromides, the synthesis of α-aryl carbonyl compounds via aldehyde and aryl halide coupling, and the cross-coupling of arylthiophene derivatives through C-H functionalization. Moreover, it is applied in tandem nucleophilic allylation-alkoxyallylation reactions of alkynylaldehydes, enantioselective hydrosilylation of olefins, asymmetric allylic alkylation and amination, serving as a palladium source in cross-coupling reactions, often with Trost ligands, and in the carbostannylation of alkynes, and it acts as a precursor in the α-arylation of aldehydes.