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OALib Journal期刊
ISSN: 2333-9721
费用：99美元
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侧链带有L-氨基酸乙酯的螺旋聚苯乙炔衍生物的手性识别能力研究
DOI: 10.3724/SP.J.1105.2013.13054, PP. 811-816
Keywords: 聚苯乙炔衍生物,螺旋构象,手性侧链,链接基团,高效液相色谱,手性识别
Abstract:
采用Rh(nbd)BPh4催化剂合成了3种侧链带有L-氨基酸乙酯的螺旋聚苯乙炔衍生物PPA-S-Phe、PPA-S-Leu和PPA-A-Leu,并将其涂覆在氨丙基硅胶上制备高效液相色谱(HPLC)手性固定相(CSP),研究其对7种对映体的手性识别能力.由于侧链手性基团或主链与手性基团之间的链接基团不同,PPA-S-Phe、PPA-S-Leu和PPA-A-Leu形成了不同的螺旋构象,并表现出对对映体不同的手性识别能力.PPA-S-Phe和PPA-S-Leu的主链与手性基团之间的链接基团均为磺酰胺基,侧链手性基团为L-亮氨酸乙酯的PPA-S-Leu的手性识别能力优于侧链手性基团为L-苯丙氨酸乙酯的PPA-S-Phe.PPA-S-Leu和PPA-A-Leu的侧链手性基团均为L-亮氨酸乙酯,以酰胺基为链接基团的PPA-A-Leu的手性识别能力明显优于以磺酰胺基为链接基团的PPA-S-Leu.螺旋聚苯乙炔主链与侧链手性基团之间的链接基团、侧链手性基团在手性识别中均发挥十分着重要作用.
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