1,4-Bis(diphenylphosphino)butane-palladium(II) chloride

1. Catalyst for the Grignard coupling for regioand stereoselective monoalkylation and arylation of 1,1-dichloro-1-alkenes
2. Synthetic pyrethriods: catalyst for the Negishi coupling of (2,2-dihaloethenyl)cyclopropanecarboxylates

yellow solid

Dichloro[bis(1,4-diphenylphosphino)butane]palladium(II) is used for the catalysis of styrene carbonylation, coupling of alkyl Grignard reagents with organic halides, selective monoalkylation of organic polyhalides, and modification of the dihalovinyl moiety of synthetic pyrethroids.