作者:M. Belén Jiménez、Victoria Alcázar、Rafael Peláez、Francisca Sanz、Ángel L. Fuentes de Arriba、M. Cruz Caballero
DOI:10.1039/c1ob06540h
日期:——
Urea
receptor
1 based on two (1-amino-8-amido-3,6-dichloro)carbazole units shows a strong association with dicarboxylate anions such as oxalate, malonate and succinate guests through multiple hydrogen bonds from the carbazole, urea and amide NH groups. 1H NMR complexation studies exhibit high values of association constants in DMSO-d6. X-ray structures of the 1 : 1 complexes of 1 with oxalate and malonate as their ditetrabutylammonium salts were obtained. A modelling study of the complex of receptor 1 with succinate (as its diTBA salt) showed a more reduced geometric complementarity than its homologue malonate.
尿素受体 1 以两个(1-氨基-8-氨基-3,6-二氯)咔唑单元为基础,通过咔唑、尿素和酰胺 NH 基团上的多个氢键,与草酸盐、丙二酸盐和琥珀酸盐等二羧酸阴离子有很强的结合力。1H NMR 复合物研究显示,在 DMSO-d6 中的结合常数值很高。1 :1 复合物的 X 射线结构。对受体 1 与琥珀酸(作为其二叔丁基铵盐)的复合物进行的建模研究显示,其几何互补性比其同源物丙二酸盐更低。