Large-Scale One-Pot Synthesis of N-Heterocyclic Carbene-Pd(allyl)Cl Complexes

Abstract

Improved one-pot syntheses of (IPr)Pd(allyl)Cl {IPr = [N,N′-bis(2,6-diisopropylphenyl)imidazol]-2-ylidene} and (SIPr)Pd(allyl)Cl {SIPr = [N,N′-bis(2,6-diisopropylphenyl)-4,5-dihydroimidazol]-2-ylidene} complexes are described. This simple method utilizes technical grade isopropanol and water as solvents, affording gram quantities of the cross-coupling pre-catalysts.

Key words

N-heterocyclic carbene - palladium - homogeneous catalysis

References

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