Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5220176 | Tetrahedron | 2011 | 7 Pages |
Abstract
Kinetic resolution of a racemic mixture of C2-symmetric 18-crown-6 diols (rac-1a) and 15-crown-5 diol (rac-1c) was achieved by lipase-catalyzed acetylation. The enantiomeric excess of the chiral crown diols (95% ee and 82% ee) was determined by 1H NMR spectroscopy, using (R)-(+)-1-(1-naphthyl)ethylammonium hydrochloride as a shift reagent. The C2-symmetric chiral 15-crown-5 diol (>95% ee) was also obtained by kinetic resolution of the racemic diacetate (rac-2c) using lipase-catalyzed solvolysis.
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Related Topics
Physical Sciences and Engineering
Chemistry
Organic Chemistry
Authors
Misako Nakamura, Takuya Taniguchi, Naohisa Ishida, Keishi Hayashi, Masahiro Muraoka, Yohji Nakatsuji,