1,3-Bis(diphenylphosphino)propane

Dppp

Colorless powder

Fixed

60-63 ° C

Insoluble in water

Attention

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1,3-bis ( diphenylphosphino) propane (abbreviated dppp) is an organic compound. It is used as a ligand for catalytically active complexes.

Representation

Dppp can be prepared by the reaction of diphenylphosphine with 1,3- dibromopropane in the presence of a base. As the base, for this purpose cesium hydroxide are used. The base deprotonated here first the phosphine, which then nucleophilic attack on bromoalkane. Alternatively, lithium may be reacted with triphenylphosphine in THF or with sodium or potassium in ammonia to form the corresponding and Phenylalkaliverbindungen Alkalidiphenylphosphiden and after selective protonation of the remaining Phenylalkaliverbindungen Alkalidiphenylphosphid be reacted with 1,3-dibromopropane.

Use

The main application area is the use of dppp as a bidentate chelating ligand in transition-metal coupling reactions.

The complex of nickel chloride ( [Ni ( dppp) Cl2] ) can be used as a catalyst for the alkylation of enol ethers with Grignard reagents.