- (6S)-Hydroxy-3-oxo-alpha-ionol glucosides from Capparis spinosa fruits.
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Two new (6S)-hydroxy-3-oxo-alpha-ionol glucosides, together with corchoionoside C ((6S,9S)-roseoside) and a prenyl glucoside, were isolated from mature fruits of Capparis spinosa. The structures were established on the basis of spectroscopic, chiroptic and chemical evidence. In addition, the 13C-resonance of C-9 was found to be of particular diagnostic value in assigning the absolute configuration at that center in ionol glycosides. The alpha-ionol derivatives are metabolites of (+)-(S)-abscisic acid.
- Calis, Ihsan,Kuruuezuem-Uz, Ayse,Lorenzetto, Piergiorgio A,Rueedi, Peter
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- Medicinal foodstuffs. V. Moroheiya. (1): Absolute stereostructures of corchoionosides A, B, and C, histamine release inhibitors from the leaves of Vietnamese Corchorus olitorius L. (Tiliaceae)
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Three new ionone glucosides named corchoionosides A, B, and C were isolated from the leaves of Corchorus olitorius, commonly called 'moroheiya' in Japanese, together with seven known compounds, an ionone glucoside (6S,9R)-roseoside, a monoterpene glucosid
- Yoshikawa, Masayuki,Shimada, Hiromi,Saka, Masami,Yoshizumi, Satoshi,Yamahara, Johji,Matsuda, Hisashi
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- Synthesis of optically active vomifoliol and roseoside stereoisomers
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A synthesis of optically active vomifoliol stereoisomers 1-4 and their glucosides, roseoside stereoisomers 5-8, was accomplished via α-acetylenic alcohol 11a or 11b effectively prepared by an asymmetric transfer hydrogenation of α,β-acetylenic ketone 10. Simultaneous separation of these stereoisomers by HPLC was also perfomed.
- Yamano, Yumiko,Ito, Masayoshi
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p. 541 - 546
(2007/10/03)
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