Absolute Configuration of Free and Bound 3-Hydroxy-β-Damascone and of 3-Oxo-α-Ionol β-D-Glucopyranoside in Tobacco
作者:
RaymondL. Baumes,
ChristopheC. Aubert,
ClaudeL. Bayonove,
期刊:
Journal of Essential Oil Research
(Taylor Available online 1994)
卷期:
Volume 6,
issue 6
页码: 601-606
ISSN:1041-2905
年代: 1994
DOI:10.1080/10412905.1994.9699351
出版商: Taylor & Francis Group
关键词: Nicotiana tabaccum;Oriental tobacco;Solanaceae;aroma precursor;3-hydroxy-β-damascone β-D-glucopyranoside;3-oxo-α-ionol β-D-glucopyranoside;absolute configuration
数据来源: Taylor
摘要:
The free and bound fractions of a sample of Oriental tobacco,Nicotania tabaccumL., were separated by selective retention on Amberh'te XAD-2 resin. Free forms of E-3-hydroxymegastigma-5,8-dien-7-one (3-hydroxy-β-damascone) and E-9-hydroxymegastigina-4,7-dien-3-one (3-oxo-α-ionol) outweighed the bound forms by respective ratios of 40:1 and 138:1. The absolute configuration of free and bound 3-hydroxy-β-damascone were shown to be 3R. Furthermore the aglycone of the β-D-glucopyranoside of (E)-9-hydroxymegastigma-4,7-dien-3-one(E-3-oxo-α-ionol) was assigned both (6R,9S) and (6R,9R) configurations. The ratio of these two epimers was found to be similar to their ratio in the whole glycosidic fraction, but it was quite different in the free fraction. Finally the elution order of the four diastereomeric trifluoroacetylated β-D-glucopyranosides of E-3-oxo-α-ionol was determined on a GC capillary column
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