Construction of new [2]pseudorotaxanes by hydrogen bonding assembly of macrocyclic tetrathiolactam with amides and an ester
摘要:
Thionation of a macrocyclic tetralactam gave a new macrocyclic tetrathiolactam. [2]Pseudorotaxanes constructed from the macrocycle with diamides and a diester as a neutral guest have been prepared by a facile threading process. Molecular structures and hydrogen bonding association properties of the [2]pseudorotaxanes were characterized by X-ray crystallography and (1)H NMR spectroscopy. (C) 2004 Elsevier Ltd. All rights reserved.
本文报道了一系列带有苄基酰胺大环的基于琥珀酰胺的[2]轮烷的脱螺纹。在快速真空热解,常规加热或微波辐照下,这些转化定量进行。研究螺纹末端和大环腔内的塞子的大小互补性,使我们能够建立最佳的取代基,以实现从互锁前体中挤出螺纹。多种1为了评估脱线过程的速率常数,轮烷的半衰期以及温度和溶剂对这些过程的影响,进行了1 H NMR动力学实验。使用二丁基氨基基团作为塞子,可以合理的收率得到轮烷的前体,并允许轮烷的定量脱脂。已经开发了包括轮烷形成及其进一步脱线在内的整个过程,用于制备苄基酰胺大环化合物,在大多数情况下,这些化合物可增强经典(2 + 2)缩合反应和其他报道的逐步合成的结果。
Clays as a Host Matrix in the Synthesis of Organic Macrocycles
作者:Vasilios Georgakilas、Dimitrios Gournis、Athanasios B. Bourlinos、Michael A. Karakassides、Dimitrios Petridis
DOI:10.1002/chem.200204555
日期:2003.8.18
A new approach for the synthesis of amide macrocycles, based on the use of organo-clay derivatives as controlling template, is proposed as an alternative to the rotaxanemethod. Dications of p-xylylene diamine inserted in the clay interlayer space act as molding pillars around which neutral diamine molecules are erected via hydrogen bonding and pi-pi interactions to form supramolecular arrays. Condensation
Embodiments relate to the field of chemistry and biochemistry, and, more specifically, to novel near-infrared dyes that are photostable and resistant to quenching. The dyes belong to a novel family of squaraine rotaxanes, and they are particularly well-suited for use in biological applications. Also disclosed are methods of synthesizing the dyes and methods of using the dyes.
Luminescent reporter compounds that are rotaxanes having the structure
where B—Z—C is a reporter molecule based on a cyanine, squaric acid, or other reporter, and K is a macrocycle that encircles and interlocks with the reporter molecule. Applications of the reporter compounds are provided, as well as reactive intermediates used to synthesize the reporter compounds, and methods of synthesizing the reporter compounds.