Chiral macrocycles with the hydrogen bond donor/acceptor sites in the cavity were synthesized and covalently bonded to silica gel to give chiral stationary phases (CSPs), which showed excellent abilities to resolve various chiral compounds including ketones, esters, carboxylic acids, sulfoxides, amines, amino acid derivatives, and metal complexes. The effect of the linker connecting the macrocyclic
OPTICAL-ISOMER SEPARATING AGENT FOR CHROMATOGRAPHY AND PROCESS FOR PRODUCING THE SAME
申请人:Ema Tadashi
公开号:US20100292464A1
公开(公告)日:2010-11-18
A novel optical-isomer separating agent for chromatography is provided which has, as a chiral selector, a macrocyclic amide compound having the ability to function as a chiral shift agent. The optical-isomer separating agent for chromatography is formed by bonding, with a carrier by chemical bonding, a specific ring structure containing an asymmetry recognition site, an amide group as a hydrogen-bond donor site, and a hydrogen-bond acceptor site.
Versatile and Practical Chiral Shift Reagent with Hydrogen-Bond Donor/Acceptor Sites in a Macrocyclic Cavity
作者:Tadashi Ema、Daisuke Tanida、Takashi Sakai
DOI:10.1021/ol0613665
日期:2006.8.1
macrocycle 1 with C2 symmetry was newly synthesized. NMR studies demonstrated that receptor 1 functions as a chiral shift reagent (solvating agent) that is highly effective for a wide range of chiral compounds having a carboxylic acid, oxazolidinone, lactone, alcohol, sulfoxide, sulfoximine, isocyanate, or epoxide functionality. Binding constants were determined to investigate the binding behavior of 1.
Versatile and Practical Macrocyclic Reagent with Multiple Hydrogen-Bonding Sites for Chiral Discrimination in NMR
作者:Tadashi Ema、Daisuke Tanida、Takashi Sakai
DOI:10.1021/ja073476s
日期:2007.8.1
the best chiral solvating agent (shift reagent), which is effective for a wide range of chiral compounds having a carboxylic acid, oxazolidinone, carbonate, lactone, alcohol, sulfoxide, sulfoximine, sulfinamide, isocyanate, or epoxide functionality. The addition of only 5 mol % (69 microg, 0.15 mM) of 1 splits the enantiomeric signals of sulfoxide 13. The excellent performance of 1 as a chiral solvating
Enantioselective fluorescent sensor for dibenzoyl tartrate anion based on chiral binaphthyl derivatives bearing an amino acid unit
作者:Haijuan Qin、Yongbing He、Chenguang Hu、Zhihong Chen、Ling Hu
DOI:10.1016/j.tetasy.2007.06.027
日期:2007.8
The fluorescent photoinduced electron transfer (PET) chemosensors 1–3 based on (S)-1,1′-bi-2-naphthol were designed for their recognition of dibenzoyl tartrate anions. The binding properties for hydroxy acid anions were examined by the fluorescence and 1H NMR spectra. The results indicated that receptor 1 exhibit excellent enantioselectivity toward the enantiomers of dibenzoyl tartrate anion.
荧光光诱导电子转移(PET)化学传感器1 - 3基于(小号)-1,1'-二-2-萘酚被设计为它们的识别二苯甲酰酒石酸盐的阴离子。通过荧光和1 H NMR光谱检查了羟基酸阴离子的结合性能。结果表明,受体1对酒石酸二苯甲酰酯阴离子的对映体表现出优异的对映选择性。