We describe herein a new method that allows selective production of CatellaniâHeck isomers from various aryl halides, including ones without ortho-groups. Under previous conditions, unhindered aryl halides were plagued with the formation of simple Heck isomers and multiple arylation and norbornene insertion. The use of a bulky PtBu3 ligand accelerates CâC reductive elimination from the key palladacycle.
我们在此描述了一种新方法,可以选择性地从各种芳基卤化物中生产Catellani–Heck异构体,包括不含邻位基团的芳基卤化物。在以往的条件下,未受阻的芳基卤化物常常会产生简单的Heck异构体以及多重芳基化和挪步烯插入。使用大型的PtBu3
配体加速了关键
钯环的C–C还原消除反应。