Synthesis and Structure of Planar Chiral, Bifunctional Aminoboronic Acid Ferrocene Derivatives
作者:Andrei S. Batsanov、Damien Hérault、Judith A. K. Howard、Leonard G. F. Patrick、Michael R. Probert、Andrew Whiting
DOI:10.1021/om070038l
日期:2007.4.1
N‘-Diisopropylferrocenecarboxamide is utilized for an asymmetric, directed metalation approach to several planar chiral bifunctional ferrocene derivatives. Directed metalation using n-butyllithium-(−)-sparteine on N,N‘-diisopropylferrocenecarboxamide can be achieved to give high yields of the corresponding boronic acid; however, it was found that a sequence involving asymmetric directed metalation−bromination, followed