Extended Structures Built on a Triphenoxymethane Platform −C3-Symmetric, Conformational Mimics of Calix[n]arenes
作者:Maarten B. Dinger、Michael J. Scott
DOI:10.1002/1099-0690(200007)2000:13<2467::aid-ejoc2467>3.0.co;2-n
日期:2000.7
alanine derived systems were determined by X-ray analyses, and in all cases, the three phenolate arms point up with respect to the central methine. Alkali metal binding studies (Li, Na, K, Rb, and Cs) were carried out for the dimethylamine, benzylamine, and glycine compounds 5−7, and these compounds were found to have some selectivity for potassium cations. NMR studies demonstrate that C3 symmetry is retained
一系列 C3 对称三(3,5-二烷基-2-羟基苯基)甲烷(烷基 = 叔丁基、甲基、叔戊基)已从各自的酚类中以高产率合成并得到充分表征,包括单晶 X -射线结构的两个例子。二叔丁基取代的化合物 1a 已衍生为三酰氯 4,然后用各种胺(二甲胺、苄胺、甘氨酸和丙氨酸)处理,从中得到相应的三酰胺 5形成了-8个。二甲胺、甘氨酸和丙氨酸衍生系统的绝对几何和构象通过 X 射线分析确定,并且在所有情况下,三个酚盐臂相对于中心次甲基指向上方。对二甲胺、苄胺和甘氨酸化合物 5-7 进行了碱金属结合研究(Li、Na、K、Rb 和 Cs),并且发现这些化合物对钾阳离子具有一定的选择性。核磁共振研究表明,所有化合物都保留了 C3 对称性,锂离子络合的化学计量比为 1:1,而络合钠阳离子需要两个配体。还测定了具有苦味酸锂的二甲胺衍生物和具有四苯基硼酸钠的苄胺和甘氨酸衍生物的晶体结构。