Chirality-Memory Molecule: Crystallographic and Spectroscopic Studies on Dynamic Molecular Recognition Events by Fully Substituted Chiral Porphyrins
作者:Yukitami Mizuno、Takuzo Aida、Kentaro Yamaguchi
DOI:10.1021/ja000052o
日期:2000.6.1
mandelate. IR and 1H NOESY NMR spectroscopies in CH2Cl2 indicated that a similar binding mode is operative in solution. A series of fullysubstitutedchiralporphyrins having different numbers of o-dimethoxyphenyl groups at the meso-positions (1−3) showed different chiral transfer efficiencies and ring inversion activities. Thermal racemization profiles of protonated 2 in a variety of achiral carboxylic
D2 对称鞍形卟啉如 2,3,7,8,12,13,17,18-octamethyl-5,15-bis(2',6'-dimethoxyphenyl) 的扁桃酸络合物的 X 射线晶体学)-10,20-二苯基卟啉 (2) 表明两个扁桃酸阴离子以单齿方式与吡咯 NH 部分氢键合,其中卟啉大环的绝对结构以这样的方式确定,即宿主的受阻最小部分分子容纳扁桃酸的苯基。CH2Cl2 中的 IR 和 1H NOESY NMR 光谱表明类似的结合模式在溶液中有效。一系列在中间位置 (1-3) 具有不同数量的邻二甲氧基苯基的完全取代的手性卟啉表现出不同的手性转移效率和转环活性。
Amplified Chiral Transformation through Helical Assembly