[EN] PROCESS FOR THE PREPARATION OF ASYMMETRICALLY SUBSTITUTED BIARYLDIPHOSPHINES<br/>[FR] PROCEDE DE PREPARATION DE BIARYLDIPHOSPHINES A SUBSTITUTION ASYMETRIQUE
申请人:LONZA AG
公开号:WO2006002730A1
公开(公告)日:2006-01-12
Provided is a process for the preparation of asymmetrically substituted biaryldiphosphine ligands of the formula (I), wherein R1 is C1-6-alkyl or C3-10-cycloalkyl optionally substituted with one or more halogen atoms, and R2 and R3 are equal and are selected from the group consisting of aryl, C5-10-cycloalkyl and C1-6-alkyl, or R2 is C5-10-cycloalkyl or C1-6-alkyl, and R3 is aryl 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, C5-10-cycloalkyl, C1-6-alkoxy and di-C1-6-alkylamino group in R2 and R3 optionally being substituted with one or more halogen atoms, from 2,2’,6,6’-tetrabromobiphenyl by a sequence of brominemetal exchanges and subsequent reactions.
提供了一种制备公式(I)的不对称取代双芳基二膦配体的方法,其中R1是C1-6-烷基或C3-10环烷基,可选择地取代一个或多个卤素原子,而R2和R3相等,选自芳基、C5-10环烷基和C1-6烷基的群体,或者R2是C5-10环烷基或C1-6烷基,而R3是芳基,可选择地取代一个或多个来自卤素原子、硝基、氨基、C1-6烷基、C1-6烷氧基和双C1-6烷基氨基团的取代基,R2和R3中的每个C1-6烷基、C5-10环烷基、C1-6烷氧基和双C1-6烷基氨基团可选择地取代一个或多个卤素原子,通过一系列溴金属交换和随后的反应从2,2',6,6'-四溴联苯制备。