Igawa K, Uehara K, Kawasaki Y, Tomooka K. Stereochemical study on planar-chiral cyclic molecules using polysaccharide-based column chromatography.
Chirality 2022;
34:824-832. [PMID:
35403298 DOI:
10.1002/chir.23429]
[Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2021] [Revised: 02/10/2022] [Accepted: 02/10/2022] [Indexed: 12/18/2022]
Abstract
The presence of planar chirality of a variety of medium-sized heterocycles, along with nine-membered cyclic ketone and its enol ester, was revealed by observation of isolable enantiomers by analytical high-performance liquid chromatography (HPLC) using a chiral stationary phase with a polysaccharide-based chiral selector. Several tens of milligrams of enantiomers of the planar-chiral molecules were successfully separated by preparative-scale HPLC, leading to the preparation of an enantioenriched sample. This in turn enabled detailed stereochemical studies, including measurement of half-lives of the optical activity and X-ray crystallography for elucidation of stereochemistry.
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