Design, Synthesis and Recognition Properties of Urea-Type Anion Receptors in Low Polar Media
作者:Luca Pescatori、Arturo Arduini、Andrea Pochini、Franco Ugozzoli、Andrea Secchi
DOI:10.1002/ejoc.200700740
日期:2008.1
the nature of the spacer Y induces important electronic effects and conformational changes that lead to different degrees of preorganisation of the NH binding groups. In addition, the synthesis and binding properties of new lipophilic urea-based receptors, having electron-withdrawing alkylsulfonyl substituents (SO2C8H17) and characterised by enhanced NH hydrogen-bond donor ability, is reported.(© Wiley-VCH
带有两个 NH 氢键供体基团的简单受体,通式为 PhCH2NH-Y-NHPh (Y = C=N-Ts, SO2, CS, CO) 对选定的阴离子客体的结合效率已在氯仿溶液中进行了评估为了评估纳入受体支架的不同结合位点的性质的影响。实验结果连同分子力学和量子化学计算表明,间隔基 Y 的性质引起了重要的电子效应和构象变化,从而导致 NH 结合基团的不同程度的预组织。此外,还报道了具有吸电子烷基磺酰基取代基 (SO2C8H17) 并以增强的 NH 氢键供体能力为特征的新型亲脂性脲基受体的合成和结合特性。