Diarylated Ethanones from Mo(CO)<sub>6</sub>-Mediated and Microwave-Assisted Palladium-Catalysed Carbonylative Negishi Cross-Couplings
作者:Hitesh V. Motwani、Mats Larhed
DOI:10.1002/ejoc.201300610
日期:2013.8
Two protocols for palladium-catalysed carbonylative Negishi cross-couplings were developed for aryl iodides and aryl bromides. The two main breakthroughs were that molybdenum hexacarbonyl [Mo(CO)(6)] could be used as a solid in situ source of CO, and that controlled microwave irraditaion could be used for heating. Consequently, the reactions were safe (in contrast to when CO gas was used) and fast
为芳基碘化物和芳基溴化物开发了钯催化羰基化 Negishi 交叉偶联的两种方案。两个主要突破是六羰基钼 [Mo(CO)(6)] 可用作 CO 的固体原位源,并且可控微波辐照可用于加热。因此,反应是安全的(与使用 CO 气体时相比)和快速(与使用传统加热时相比)。羰基化交叉偶联反应使用市售的苄基溴化锌在密闭小瓶(90-120 摄氏度,0.5-1 小时)中进行,得到一组二芳基化乙酮,这是几种药物中常见的药效团,中度至高度分离产率 (47-84%)。这里介绍的温和的三组分羰基化方案在操作上简单、安全、快速,