Synthesis and Study of Calix[6]cryptamides: A New Class of Heteroditopic Receptors that Display Versatile Host–Guest Properties Toward Neutral Species and Organic Associated Ion-Pair Salts
作者:Stéphane Le Gac、Ivan Jabin
DOI:10.1002/chem.200701051
日期:2008.1.7
The synthesis of a new family of molecular receptors, namely the calix[6]cryptamides, was achieved through an original [1+1] macrocyclization step that consists of a peptide-coupling reaction between tripodal triscarboxylic acids and a calix[6]trisamine subunit. Several C3- or C3v-symmetrical calix[6]arene-based compounds capped by a trisamido cryptand unit on the narrow rim have been obtained, with
新的分子受体家族,即杯[6]隐酰胺的合成,是通过原始的[1 + 1]大环化步骤完成的,该步骤由三脚架三羧酸和杯[6]三胺亚基之间的肽偶联反应组成。已经获得了几种由C3或C3v对称的杯[6]芳烃对称的芳烃化合物,该化合物在狭窄的边缘上被一个三酰胺基隐窝单元封端,更灵活的配偶体导致了最佳的收率。这些calix [6] cryptamides展示了两个位置很近的有机缔合离子对的络合位置:一个明确定义的calix [6] arene腔体,适合包含铵离子和一个cryptamide单元,用于协调铵离子。阴离子。我们展示了一个例子,手性杯[6]隐酰胺12 由于极化和感应拟合效应的结合,它构成了一个异位受体,能够协同结合伯铵离子和其氯离子抗衡离子。此外,疏水的杯芳烃腔体12可通过氢键牢固地结合中性客体,并能够区分不同的对映异构体。所有这些通用的来宾属性都不同于在父杯[6]杂合密码子中观察到的那些。