Highly Regioselective Preparation of Heteroaryl-Magnesium Reagents by Using a Br/Mg Exchange
作者:Christoph Sämann、Benjamin Haag、Paul Knochel
DOI:10.1002/chem.201202230
日期:2012.12.7
Disubstituted thienyl‐, furyl‐ and pyridylmagnesium derivatives are regioselectively prepared from a Br/Mgexchange 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