共查询到17条相似文献,搜索用时 203 毫秒
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
A novel type of molecular tweezers with different chiral center and cleft has been designed and prepared by usingα-hyodeoxycholic acid as spacer and D/L-amino acid methyl ester as chiral arm attached at 3-position.Their structures were elucidated by ~1H NMR,FTIR and elemental analysis.Their recognition properties for various D/L-amino acid methyl esters were also investigated.The preliminary results indicated that these chiral single-armed molecular tweezers exhibited good recognition ability for D/L-ami... 相似文献
14.
15.
摘要 以α-猪去氧胆酸为隔离基,在3位桥联不同的D,L-氨基酸甲酯作手性臂,合成了具有不同手性中心和裂穴的新型分子钳受体。结构均经1H NMR、IR及元素分析确证,并考察了其对D/L-氨基酸甲酯的识别性能。初步研究表明,这类分子钳对D/L-氨基酸甲酯具有良好的识别性能,其结合常数(Ka)可达5.24 × 103 L•mol-1。 相似文献
16.
A novel type of chiral molecular tweezers has been designed and synthesized by using deoxycholic acid as backbone and ethanoyl and the chiral unsymmetrical urea unit as arms. Their structures were characterized by 1H NMR, IR, MS spectra and elemental analysis. These molecular tweezers showed good binding ability for neutral molecules and chiral molecules. 相似文献