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Optically active distorted cyclic triptycenes: chiral stationary phases for HPLC†
Tomoyuki Ikai,Naoya Nagata,Seiya Awata,Yuya Wada,Katsuhiro Maeda,Motohiro Mizuno,Timothy M. Swager
RSC Advances Pub Date : 06/05/2018 00:00:00 , DOI:10.1039/C8RA04434A
Abstract

A pair of optically active triptycene derivatives ((R,R)- and (S,S)-8) with a distorted cyclic structure were synthesized via an intramolecular etherification and evaluated as a novel chiral selector for high-performance liquid chromatography. The (R,R)- and (S,S)-8-based chiral stationary phases (CSPs) were found to be particularly effective in the resolution of axially chiral biaryl compounds. The importance of the distorted cyclic structure present in 8 for chiral recognition was demonstrated by comparisons with the corresponding non-cyclic model compound ((R,R)-9), which did not display enantioselectivity in the separation of the test racemates.

Graphical abstract: Optically active distorted cyclic triptycenes: chiral stationary phases for HPLC
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