Synthesis and host–guest properties of a calix[6]arene based receptor closed by an internal ion-paired cap

✍ Scribed by Jean-Alexandre Richard; Marc Pamart; Nicolas Hucher; Ivan Jabin

• Publisher: Elsevier Science
• Year: 2008
• Tongue: French
• Weight: 465 KB
• Volume: 49
• Category: Article
• ISSN: 0040-4039
• DOI: 10.1016/j.tetlet.2008.04.085

✦ Synopsis

The straightforward synthesis of a C s symmetrical calix[6]arene possessing carboxylic acid groups as well as an ammonium arm is described. This calixarene can encapsulate ammonium ions through a highly selective recognition process thanks to the presence of an internal ion-paired cap that preorganizes the cavity and constitutes an efficient binding site.