申请人:Lonza AG
公开号:EP1609795A1
公开(公告)日:2005-12-28
Provided is a process for the preparation of asymmetrically substituted biaryldiphosphine ligands of the formula
wherein R1 is C1-6-alkyl or C3-10-cycloalkyl optionally being substituted with one or more halogen atoms, and
R2 and R3 are independently selected from the group consisting of aryl, C5-10-cycloalkyl and C1-6-alkyl, wherein each aryl moiety is optionally substituted with one or more substituents selected from the group consisting of halogen atoms, nitro, amino, C1-6-alkyl, C1-6-alkoxy and di-C1-6-alkylamino groups, and each C1-6-alkyl, C1-6-alkoxy, di-C1-6-alkylamino and C5-10-cycloalkyl group in R2 and R3 optionally being substituted with one or more halogen atoms, from 2,2',6,6'-tetrabromobiphenyl by a sequence of halogen-metal exchanges and subsequent reactions.
提供了一种制备不对称取代双芳基二膦配体的过程,其化学式如下:其中R1为C1-6-烷基或C3-10环烷基,可选地取代有一个或多个卤素原子,而R2和R3分别选自芳基、C5-10环烷基和C1-6烷基的基团,其中每个芳基基团可选地取代有一个或多个取代基,包括卤素原子、硝基、氨基、C1-6烷基、C1-6烷氧基和二C1-6烷基胺基团,R2和R3中的每个C1-6烷基、C1-6烷氧基、二C1-6烷基胺基和C5-10环烷基基团可选地取代有一个或多个卤素原子,通过一系列卤素-金属交换和随后的反应从2,2',6,6'-四溴联苯制备而得。