パラジウム（Ｉ）トリ−ｔ−ブチルホスフィンブロミド二量体の製造方法および異性化反応においてそれを使用するプロセス

摘要

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)(PtBu3)]2. The method is based on a comproportionation reaction in which a Pd(ll) compound (═PdBr2) is reacted with a Pd(0) compound (═Pd(PtBu3)2) in organic solvents to yield the [Pd(μ-Br)(PtBu3)]2 compound having the Pd atoms in the formal oxidation state +1. Unreacted PdBr2 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 R1—C(O)—O—CH(R2)—C(R3)═CH2 employing the compound Pdμ-Br)(PtBu3)]2 as a catalyst is disclosed.