Abstract
Ethyl 4-oxobutyrate-2-14C added to a simulated sherry under an actively growing film of S. fermentati yielded radioactive gamma-butyrolactone, diethyl succinate, ethyl 4-oxobutyrate diethyl acetal, an unidentified ester, and 4-hydroxy-5-ketohexanoic acid gamma-lactone, thus confirming the pathways proposed earlier for their formation. When unlabeled ethyl 4-oxobutyrate was used in similar experiments, the same compounds and 4,5-dihydroxyhexanoic acid gamma-lactone had their concentrations enhanced. 4-Hydroxy-5-ketohexanoic acid gamma-lactone isolated from the latter experiment was optically active (+) and showed a specific rotation vs. wavelength "plain curve."
- Received November 1980.
- Revision received February 1981.
- Accepted February 1981.
- Published online January 1981
- Copyright 1981 by the American Society for Enology and Viticulture
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Vol 32 Issue 2
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