Affiliation:
1. Central Research Institute, The Japan Tobacco and Salt Public Corporation, 6-2 Umegaoka, Midori-ku, Yokohama 227, Japan
Abstract
Aspergillus niger
JTS 191 was selected from many microorganisms tested as capable of converting ionones to other compounds having aromas. The individual transformation products from
β
-ionone were isolated and identified by comparison with synthetically derived compounds. The major products were (
R
)-4-hydroxy-
β
-ionone and (
S
)-2-hydroxy-
β
-ionone. 2-Oxo-, 4-oxo-, 3,4-dehydro-, 2,3-dehydro-4-oxo-, 3,4-dehydro-2-oxo-, (
S
)-2-acetoxy-, (
R
)-4-acetoxy-, and 5,6-epoxy-
β
-ionone and 4-(2,3,6-trimethylphenyl)-but-3-en-2-one were also identified. Analogous transformation products of
β
-methylionone also were identified. Based on gas-liquid chromatographic analysis during the fermentation, we propose two main oxidative pathways of
β
-ionone. The results of this study suggest that these transformations of
β
-ionones may be useful as tobacco-flavoring compounds.
Publisher
American Society for Microbiology
Subject
Ecology,Applied Microbiology and Biotechnology,Food Science,Biotechnology
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