The Isomeric Composition of 6-Deoxy-D-XYLO-Hexos-5-Ulose in Aqueous Solution as Determined by1H and13C NMR
作者:
DonaldE. Kiely,
JamilW. Talhouk,
JamesM. Riordan,
Kathy Gray,
期刊:
Journal of Carbohydrate Chemistry
(Taylor Available online 1983)
卷期:
Volume 2,
issue 4
页码: 427-438
ISSN:0732-8303
年代: 1983
DOI:10.1080/07328308308057889
出版商: Taylor & Francis Group
数据来源: Taylor
摘要:
Acid hydrolysis of 6-deoxy-1,2-O-isop ropylidene-α-d-xylo-hexo-furanos-5-ulose (4) yielded gummy 6-deoxy-d-xylo-hexos-5-ulose (1) as an isomeric mixture of two furanose forms, 6-deoxy-α-d-xylo-hexo-furanos-5-ulose and 6-deoxy-β-d-xylo-hexofuranos-5-ulose, and a pyranose structure1R, 5R-6-deoxy-d-xylo-hexopyranos-5-ulose. The combined percentage (64%) of the furanoses represents an unusually large amount of free carbonyl form for a sugar when compared to simple hexoses and 2-hexuloses. Isomeric structures were determined in deuterium oxide solution by1H and13C NMR.
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