Synthesis of highly hindered polyanionic chelating ligands
作者:Claudio A. Jiménez、Julio B. Belmar
DOI:10.1016/j.tet.2005.02.064
日期:2005.4
Practical and efficient protocols to obtain highly hindered polyanionic chelating ligands based on bis-(3,5-di-tert-butyl-2-hydroxybenzamido) compounds are reported here. N-3,5-di-tert-Butylsalicyloyloxysuccinimide was treated with aliphatic diamines to form aliphatic hydrocarbon-linked bis-amides 4a–4g. Aromatic diamines required more powerful electrophile, thus the corresponding benzylated acid chloride