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A Chiral Phosphorous Derivatizing Agent for the Determination of the Enantiomeric Excess of Chiral Alcohols, Amines by ^(31)P NMR
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作者 Kang Ying LI Zheng Hong ZHOU +1 位作者 Chi Hung YEUNG Chu Chi TANG 《Chinese Chemical Letters》 SCIE CAS CSCD 2001年第10期907-908,共2页
A chiral phosphorous derivatizing agent prepared from PCl3 and (S)-BINOL was described. It is used to determine the enantiomeric excess of chiral alcohols and amines by 31P NMR.
关键词 Chiral phosphorous DERIVATION chiral alcohols chiral amines enantiomeric excess asymmetric induction.
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Determination of Enantiomeric Excess of Glutamic Acids by Lab-made Capillary Array Electrophoresis
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作者 Jun WANG Kai Ying LIU Li WANG Ji Ling BAI 《Chinese Chemical Letters》 SCIE CAS CSCD 2006年第1期49-52,共4页
Simulated enantiomeric excess of glutamic acid was determined by a lab-made sixteen-channel capillary array electrophoresis with confocal fluorescent rotary scanner. The experimental results indicated that the capilla... Simulated enantiomeric excess of glutamic acid was determined by a lab-made sixteen-channel capillary array electrophoresis with confocal fluorescent rotary scanner. The experimental results indicated that the capillary array electrophoresis method can accurately determine the enanfiomefic excess of glutamic acid and can be used for high-throughput screening system for combinatorial asymmetric catalysis. 展开更多
关键词 Capillary array electrophoresis enantiomeric excess glutamic acid.
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Determination of Enantiomeric Purity of ν-Pyrrolidinyl Phenylpropanol by Capillary Electrophoresis Using β-Cyclodextrin Polymer as Chiral Selector
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作者 Tong WU Xin ZHOU +2 位作者 Jia Hua CHEN Jun Ling GU Ruo Nong FU 《Chinese Chemical Letters》 SCIE CAS CSCD 2001年第4期357-358,共2页
Enantiomer of n-pyrrolidinyl phenylpropanol was studied by capillary electrophoresis using b-cyclodextrin polymer as chiral selector. We determined the enantiomeric excess value of n-pyrrolidinyl phenylpropanol with R... Enantiomer of n-pyrrolidinyl phenylpropanol was studied by capillary electrophoresis using b-cyclodextrin polymer as chiral selector. We determined the enantiomeric excess value of n-pyrrolidinyl phenylpropanol with RSD 0.48%. 展开更多
关键词 Capillary electrophoresis n-pyrrolidinyl phenylpropanol enantiomeric excess value ENANTIOSEPARATION b-cyclodextrin polymer.
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Determination Enantiomer Excess(e.e.%)of Chiral Sharpless Epoxides with β-Cyclodextrin Derivatives as Chiral Stationary Phases of Capillary Gas Chromatography
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作者 Xue Yan SHI Pei LIANG Xi Wu GAO 《Chinese Chemical Letters》 SCIE CAS CSCD 2006年第4期505-508,共4页
Using four β-cyclodextrin derivatives, 2,6-di-O-benzyl-3-O-heptanonyl-β-CD, 2,6-di- O-benzyl-3-O-octanonyl-β-CD, 2,3-di-O-benzyl-6-O-heptanonyl-β-CD, and 2,3-di-O-benzyl -6-O- octanonyl-β-CD, as chiral stationary... Using four β-cyclodextrin derivatives, 2,6-di-O-benzyl-3-O-heptanonyl-β-CD, 2,6-di- O-benzyl-3-O-octanonyl-β-CD, 2,3-di-O-benzyl-6-O-heptanonyl-β-CD, and 2,3-di-O-benzyl -6-O- octanonyl-β-CD, as chiral stationary phases of capillary gas chromatography (CGC), the enantiomers of Sharpless epoxides were well separated. The enantiomer excess values (e.e.%) of some chiral Sharpless epoxides were also determined successfully using these CDs. 展开更多
关键词 Sharpless epoxides enantiomer excess capillary gas chromatography cyclodextrin derivatives.
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STUDY ON INCLUSION COMPLEXATION: 3.ENRICHING THE EXCESS ENANTIOMER FROM 1,1'-BI-2-NAPHTHOL WITH LOWER EE VIA THE INCLUSION CRYSTALLIZATION
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《厦门大学学报(自然科学版)》 CAS CSCD 北大核心 1999年第S1期192-192,共1页
关键词 BI-2-NAPHTHOL WITH LOWER EE VIA THE INCLUSION CRYSTALLIZATION EE VIA ENRICHING THE excess ENANTIOMER FROM 1 1
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Thiazolidine Derivatives as Chiral Catalysts in the Enantioselective Addition of Diethylzinc to Benzaldehyde
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作者 Qing Lin MENG Yue Lan LI +1 位作者 Yan HE Ye Di GUAN Department of Chemistry, Peking University, Beijing 100871 State Key Laboratory of Elemento-Organic Chemistry, Nankai University, Tianjin 300071 《Chinese Chemical Letters》 SCIE CAS CSCD 2000年第9期761-764,共4页
Four types of chiral thiazolidine derivatives were synthesized conveniently from natural L-cysteine and showed good enantioselectivity in up to 90% ee in the addition of diethylzine to benzaldehyde. Their enantioselec... Four types of chiral thiazolidine derivatives were synthesized conveniently from natural L-cysteine and showed good enantioselectivity in up to 90% ee in the addition of diethylzine to benzaldehyde. Their enantioselectivity was affected by the bulkiness of R and the thiazolidine ring systems in their molecules. 展开更多
关键词 chiral catalysts enantioselective addition % ee (enantiomeric excess) thiazolidine derivatives
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Tetraphenylethylene dicycle helicates: circularly polarized luminescence and chiral recognition based on emission wavelength change
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作者 Zhi-Rong Xu Miao-Li Gao +2 位作者 Ming Hu Wei Yu Yan-Song Zheng 《Science China Chemistry》 SCIE EI CAS CSCD 2024年第11期3817-3824,共8页
Chiral tetraphenylethylene(TPE) dicycle tetraaldehyde and TPE dicycle tetraacids bearing optically pure groups on the cycles were designed and synthesized. Due to the propeller-like conformation immobilization of TPE ... Chiral tetraphenylethylene(TPE) dicycle tetraaldehyde and TPE dicycle tetraacids bearing optically pure groups on the cycles were designed and synthesized. Due to the propeller-like conformation immobilization of TPE unit, this new class of TPE dicycle was resolved into M-and P-enantiomers, which could emit strong circular polarized luminescence(CPL). Interestingly,these TPE helicates displayed exceptional ability of molecule recognition. While the TPE dicycle tetraaldehyde could detect the microscale water in anhydrous tetrahydrofuran, the chiral TPE dicycle tetraacid could display different fluorescent color after interacting with two enantiomers of a wide variety of chiral amines including monoamines, diamines, and aminols, which could be applied to chiral recognition of these chiral amines. Furthermore, the emission wavelength of TPE dicycle tetraacid was found to change linearly with the enantiomer purity of chiral amine from enantiomer excess(ee) percent-100% to +100%, for the first time showing the potential for quantitative chiral analysis of chiral amines based on emission wavelength change. The emission wavelength was affected less by environmental factors than fluorescence intensity, which would enable the chiral analysis based on wavelength change with higher accuracy and repeatability. 展开更多
关键词 TPE dicycle helicate CPL chiral recognition enantiomer excess analysis emission wavelength change
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Chiral amino acid recognition in water:A BINOL-based fluorescent probe 被引量:3
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作者 Meng-Xin Sun Chuan-Zhi Ni +3 位作者 Fang-Qi Zhang Yuan-Yuan Zhu Jie Zeng Shuang-Xi Gu 《Chinese Chemical Letters》 SCIE CAS CSCD 2023年第12期136-140,共5页
A novel BINOL-based fluorescence probe(S)-6 featuring a sodium sulfonate fragment at the 2'-position was designed and synthesized via simple synthetic procedures under mild reaction conditions.The watersoluble pro... A novel BINOL-based fluorescence probe(S)-6 featuring a sodium sulfonate fragment at the 2'-position was designed and synthesized via simple synthetic procedures under mild reaction conditions.The watersoluble probe(S)-6 displays excellent enantioselective recognition toward 15 common amino acids,and it can be used for enantiomeric excess determination of amino acids.The fluorescence intensity of(S)-6 treated with amino acids reaches the maximum after standing for only 30 min at room temperature and remains stable in the following 5.5 h,which has great potential in the application of chiral fluorescence analysis due to its timeliness and outstanding fluorescent stability. 展开更多
关键词 Chiral recognition Fluorescent probe Amino acid WATER-SOLUBLE enantiomeric excess determination
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