Synthesis of a constrained ligand comprising carboxylate and amine donor groups via direct 1,8-functionalization of positionally protected fluorene
作者:Dirk Burdinski、Karen Cheng、Stephen J. Lippard
DOI:10.1016/j.tet.2004.10.111
日期:2005.2
The synthesis of 1,8-bis(dimethylaminomethylethynyl)-3,6-di(tert-butyl)fluorene-9-yl-acetic acid, a potentially dinucleating ligand containing two N-donor and bridging carboxylate groups, is described. The electronically disfavored 1,8-disubstitution of the fluorene ring system was achieved by using tert-butyl protecting groups in the 3- and 6-positions of the fluorene molecule in combination with
描述了1,8-双(二甲基氨基甲基乙炔基)-3,6-二(叔丁基)芴-9-乙酸的合成,该潜在潜在的成核配体包含两个N-供体和桥接羧酸酯基团。通过在芴分子的3位和6位上使用叔丁基保护基与作为空间需求的亲电子试剂的汞(II)结合使用,实现了芴环系统的电子上不利的1,8-二取代。1,8-二碘芴衍生物的直接合成提供了对1,8-二取代芴分子的简单通用途径。