[Pd(Cl)2{P(NC5H10)(C6H11)2}2]-A Highly Effective and Extremely Versatile Palladium-Based Negishi Catalyst that Efficiently and Reliably Operates at Low Catalyst Loadings
作者:Jeanne L. Bolliger、Christian M. Frech
DOI:10.1002/chem.201001201
日期:——
electronically activated, non‐activated, deactivated, sterically hindered, heterocyclic, and functionalized aryl bromides with various (also heterocyclic) arylzinc reagents, typically within a few minutes at 100 °C in the presence of just 0.01 mol % of catalyst. Aryl bromides containing nitro, nitrile, ether, ester, hydroxy, carbonyl, and carboxyl groups, as well as acetals, lactones, amides, anilines,
[Pd(Cl)2 P(NC 5 H 10)(C 6 H 11)2 } 2 ](1)已通过使市售的[Pd(cod)(Cl)2 ]反应定量制备。室温下在几分钟内在N 2中与易于制备的1-(二环己基膦酰基)哌啶在甲苯中的环辛二烯)。综合大楼1已被证明是极佳的Negishi催化剂,能够将各种电子活化,非活化,失活,空间受阻,杂环和官能化的芳基溴化物与各种(也是杂环的)芳基锌试剂定量偶联,通常在几分钟内即可完成。 100°C,仅存在0.01 mol%的催化剂。含有硝基,腈,醚,酯,羟基,羰基和羧基的芳基溴化物,以及缩醛,内酯,酰胺,苯胺,烯烃,羧酸,乙酸,吡啶和嘧啶已被成功用作偶联伙伴。此外,在两个反应伙伴中都可以容忍电子和空间变化。实验观察强烈表明分子机制是有效的。