作者:Mikhail V. Rekharsky、Hatsuo Yamamura、Chika Inoue、Masao Kawai、Issey Osaka、Ryuichi Arakawa、Kouhei Shiba、Akihiro Sato、Young Ho Ko、Narayanan Selvapalam、Kimoon Kim、Yoshihisa Inoue
DOI:10.1021/ja063323p
日期:2006.11.1
For the first time, achiral cucurbiturils (CBs) were endowed with significant enantiomeric and distereomeric discrimination by incorporating a strong chiral binder. Calorimetric, nuclear magnetic, light-scattering, and mass spectral studies revealed that (S)-2-methylbutylamine (as a strong binder) can be discriminated by two enantiomeric supramolecular hosts, composed of CB[6] and (R)- or (S)-2-methylpiperazine
通过结合强手性结合剂,非手性葫芦脲 (CB) 第一次被赋予显着的对映异构和对映异构区分。量热、核磁、光散射和质谱研究表明,(S)-2-甲基丁胺(作为一种强结合剂)可以通过两种对映体超分子主体进行区分,由 CB[6] 和 (R)-或( S)-2-甲基哌嗪,在 NaCl 水溶液中具有前所未有的 95% 对映选择性。对于源自非手性宿主的超分子系统,这是迄今为止报道的最高对映选择性。类似地,具有较大腔的 CB[7] 对非对映二肽表现出高达 8 倍的非对映选择性,正如 L-Phe-L-Leu-NH3+ 与 L-Phe-D-Leu-NH3+ 所证明的那样。