[GRAPHICS]Reliable and practical synthetic routes for the construction of hybrid molecules bearing both a chelating center and a useful biofunction are presented. They comprise the sequential cross coupling reaction between ethynylated synthons with iodo substituted L-tyrosine derivatives and provide access to various rationally designed chiral ligands.
Segmented multitopic ligands constructed from bipyrimidine, phenanthroline, and terpyridine modules
作者:Raymond Ziessel、Christophe Stroh
DOI:10.1016/j.tetlet.2004.03.147
日期:2004.5
Starting from bromo-substituted 2,2′-bipyrimidine or 1,10-phenanthroline building blocks, the preparation in a first step of ethynyl grafted molecules allows the production in a second step of multitopic ligands by cross-coupling with difunctionalised chelating molecules. Various combinations allow the interconnection of bipyrimidine to terpyridine, pyrene, or phenanthroline fragments. When two alkyne
Sequential synthesis of rigid multi-bipyridine ligands bearing diethynyl/phenyl solubilizing fragments
作者:Abderrahim Khatyr、Raymond Ziessel
DOI:10.1016/s0040-4039(00)00498-6
日期:2000.5
Reliable and practical synthetic routes for the construction of multitopic bipyridine ligands are presented. The first series contains the chelating fragments connected via an ethynyl function and the second series is built from an alternation of ethynyl/phenyl/bipyridine modules. The synthetic protocol is based on sequential Pd-promoted cross-coupling reactions between selected bis-bpy or ethynyl/phenyl/bpy intermediates of increasing size. The ligands bearing functionalized 1,4-diethynyl-2,5-di(dodecyloxy)benzene subunits are soluble in chlorinated solvents. (C) 2000 Elsevier Science Ltd. All rights reserved.