The invention provides a new method for the preparation of the dimeric Pd(l) tri-tert.-butylphosphine bromide complex, characterized by the chemical formula [Pd(μ-Br)(P
t
Bu
3
)]
2
. The method is based on a comproportionation reaction in which a Pd(ll) compound (=PdBr
2
) is reacted with a Pd(0) compound (=Pd(P
t
Bu
3
)
2
) in organic solvents to yield the [Pd(μ-Br)(P
t
Bu
3
)]
2
compound having the Pd atoms in the formal oxidation state +1. Unreacted PdBr
2
may be reused in the process. The method is straightforward and applicable for industrial scale production and provides high product yields. Further, a new process for the isomerization of allyl ethers of the general type R
1
—C(O)—O—CH(R
2
)—C(R
3
)═CH
2
employing the compound Pdμ-Br)(P
t
Bu
3
)]
2
as a catalyst is disclosed.
本发明提供了一种制备二聚体Pd(l)
三叔丁基膦溴化物配合物的新方法,其
化学式为[Pd(μ-Br)(PtBu3)]2。该方法基于一种共价反应,在有机溶剂中,将Pd(ll)化合物(=PdBr2)与Pd(0)化合物(=Pd(PtBu3)2)反应,产生具有Pd原子在形式氧化态+1的[Pd(μ-Br)(PtBu3)]2化合物。未反应的PdBr2可以在过程中重复使用。该方法简单易行,适用于工业规模生产,并提供高产率的产物。此外,本发明还揭示了一种以Pdμ-Br)(PtBu3)]2化合物作为催化剂的
烯丙基醚异构化的新工艺,其一般类型为R1—C(O)—O—CH(R2)—C(R3)═
CH2。