Disubstituted thienyl‐, furyl‐ and pyridylmagnesium derivatives are regioselectively prepared from a Br/Mg exchange of the corresponding dibromo compounds by using either iPrMgCl⋅LiCl or hindered arylmagnesium reagents, such as isitylmagnesium bromide⋅lithium chloride (isityl=2,4,6‐triisopropyl‐phenyl) complexed with a diamine ligand, in difficult cases. The selective functionalisations of these heterocyclic
二取代的
噻吩基,
呋喃基和pyridylmagnesium衍
生物区域选择性从对应的二
溴化合物的
溴/
镁交换通过使用制备我PrMgCl ⋅的LiCl或受阻芳基
镁试剂,如
溴化isitylmagnesium ⋅
氯化锂(isityl = 2,4,6 (
三异丙基-苯基)与二胺
配体络合,在困难的情况下。通过使用Negishi交叉偶联反应,酰化或加成醛,可以轻松实现这些杂环骨架的选择性官能化。