Lipase catalyzed transesterification of 2-substituted 3-hydroxy esters
โ Scribed by Harumi Kaga; Kunio Hirosawa; Tomiki Takahashi; Kouhei Goto
- Publisher
- John Wiley and Sons
- Year
- 1998
- Tongue
- English
- Weight
- 95 KB
- Volume
- 10
- Category
- Article
- ISSN
- 0899-0042
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โฆ Synopsis
Kinetic resolution of 2-substituted 3-hydroxy esters was examined by lipase PS catalyzed transesterification using vinyl acetate as an acyl donor. Resolution of (ยฑ)-syn-and -anti-1a, -1e possessing a small methyl group at the C-3 position was accomplished enantioselectively. The outcome of the resolution seems to be related to the differences in size of the substituents at the stereocenter bearing a secondary hydroxy group.
๐ SIMILAR VOLUMES
The lipase-catalyzed irreversible transesterification procedure using vinyl esters was applied to the resolution of racemic 2-phenoxypropanoic acids. Aspergillus niger lipase showed high enantioselectivities and reasonable reaction rates. The enantioselectivity was found to be affected profoundly by