Compounds consisting of two or three calix[4]arene substructures, where two adjacent phenolic units belong simultaneously to two adjacent calix[4]arene systems, were prepared and studied by1H NMR.
制备了由两个或三个杯[4]芳烃亚结构组成的化合物,其中两个相邻的酚单元同时属于两个相邻的杯[4]芳烃体系,并通过1 H NMR进行了研究。
Annelated Calixarenes Composed of Calix[4]arenes with Hydroxy Groups in the <i>Endo</i> and <i>Exo</i> Position
作者:Volker Böhmer、Ralph Dörrenbächer、Michael Frings、Mathias Heydenreich、Diana de Paoli、Walter Vogt、George Ferguson、Iris Thondorf
DOI:10.1021/jo9511197
日期:1996.1.1
dimer (6c) prefers a conformation (not possible in the calixarene) with two intramolecular O-H.pi(arene) interactions. Condensation of exo-calix[4]arenes 3f,g with free ortho positions (easily available by debutylation) with bisbromomethylated dimers gave annelated double (9) and triple (10) calixarenes consisting of endo- and exo-calix[4]arene substructures in yields up to 24% and 10%, respectively