biaryls in up to 92% yield. Aryl halides also undergo POPd7-catalyzed aryl-vinyl and aryl-alkyl bond formation under mild conditions. Styrenes and alkylarenes were prepared in 79-93% yield from aryl halides and vinyl or alkylzinc reagents. The replacement of aryl halides by acyl halides provides access to ketones which were produced in up to 98% yield when POPd was used as catalyst. This approach overcomes
已经制备了几种
钯次膦酸,并将其用于芳基或酰基卤与脂族和芳族
有机锌试剂的交叉偶联反应。发现POPd7催化的芳基卤化物(包括富含电子的芳基
氯化物)和芳基
锌试剂的反应可提供具有烷氧基,烷
硫基,
氨基,酮,
氰基,硝基,酯基和杂芳基基团的联芳基,产率为75-93%。使用位阻受阻的底物可获得优异的结果,该底物以高达92%的收率得到二和三邻位取代的联芳基。在温和条件下,芳基卤化物也经历POPd7催化的芳基-
乙烯基和芳基-烷基键的形成。由芳基卤化物和
乙烯基或烷基
锌试剂制备
苯乙烯和烷基
芳烃的产率为79-93%。用酰基卤取代芳基卤化物可得到酮,当使用POPd作为催化剂时,酮的产率可高达98%。该方法克服了传统的Friedel-Crafts酰化方法的受限底物范围,降低的区域控制和较低的官能团耐受性。