A method for reproducible preparation of chiral polysiloxanes with regular repeat units as stationary phases for capillary gas chromatography
作者:
Iwao Abe,
Takako Nishiyama,
Hartmut Frank,
期刊:
Journal of High Resolution Chromatography
(WILEY Available online 1994)
卷期:
Volume 17,
issue 1
页码: 9-14
ISSN:0935-6304
年代: 1994
DOI:10.1002/jhrc.1240170103
出版商: Wiley Subscription Services, Inc., A Wiley Company
关键词: Block polysiloxanes;Functionalized polysiloxanes;Chiral polysiloxanes;Enantioselective stationary GC phase;Polysiloxane synthesis
数据来源: WILEY
摘要:
AbstractTrifluoroethyl ester‐functionalized polysiloxanes can be prepared by block condensation of 3‐dichloromethylsilyl‐2‐methylpropionic acid 2′,2′,2′‐trifluoroethyl ester with 1,5‐bis(diethylamino)hexamethyltrisiloxane or with disodium tetramethyldisiloxane‐1,3‐diolate. The functionalized polysiloxanes may serve as supports for a variety of selector groups; for instance, nucleophilic displacements with L‐valine‐t‐butylamide or L‐α‐naphthylethylamine lead to chiral polysiloxanes in high yields and with high reproducibility. Imidazole accelerates the rate of nucleophilic displacement. Capillary columns coated with such chiral polysiloxanes exhibit high enanti
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