Download PDF by Chong-Ren Yang, Osamu Tanaka: Advances in Plant Glycosides, Chemistry and Biology,

By Chong-Ren Yang, Osamu Tanaka

ISBN-10: 0080544541

ISBN-13: 9780080544540

ISBN-10: 0444501800

ISBN-13: 9780444501806

Hardbound. within the plant state various chemical components ensue in a glycoside shape (conjugation with sugar). Glycosides are very important, secondary metabolites. The structural variety is due to the the big volume of sorts and stereochemical configurations of the sugar part. Aglycones belong to terpenoid, steroid, flavonoid, quinonoid, lignan, different easy phenolics, and isothiocyanate. besides the fact that, organic actions of glycosides are, in lots of instances, prone to the character of sugar moieties, even supposing their aglycone is the same.Since the 80s, plant glycosides were attracting an expanding quantity of curiosity from botanists and phytochemists world-wide for the subsequent purposes: - they're tricky to isolate and purify- they've got a vital organic functionality in flowers and memorable organic actions- they're a extremely important source of typical drugs, overall healthiness nutrients, cosmetics and f

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Bull. 36, 4167. 3. Tominaga, T. (1960) Yakugaku Zasshi 80, 1202. 4. , A. C. and Tominaga, T. (1975) Jr. Org. Chem. 40, 1057. 5. , Tanaka, O. -H. (1991) Chem. Pharm. Bull. 39, 1871. 6. , Nishino, H. and Kozuka, M. (1997) Proceeding of the International Conference on Food Factors, Ohigashi, H. et al. eds. (Springer-Verlag), in press. 7. , Kobayashi, M. and Arihara, S. (1996) Nat. Med. 50, 176. 8. , Masuda, H. and Mizutani, K. (1996) "Saponins Used in Food and Agriculture" Waller, G. R. and Yamasaki, K.

To shed light on the reaction pathway for the selective anodic oxidation, we examined the electrolysis of the 24-protected derivatives (51a, 51b), and the 3-epimer (71) of 68. In case of the 24-protected derivatives (51a, 51b), the corresponding 3-ketone derivatives were not obtained at all and the starting compounds were recovered. Here again, it was confirmed that the 24-hydroxyl group was indispensable to this selective anodic oxidation. The 3a,23dihydroxyl derivative (71) was also found to give no product by anodic oxidation.

Sugar beet, Chenopodiaceae) have been used industrially as a raw material for sugar. The fresh roots and leaves of this plant, Which is commonly called "Satoudaikon" or "Tensai" in Japanese, are used as a vegetable and food garnish in Japanesestyle dishes. In Chinese traditional medicine, the toots of sugar beet have been known to exhibit sedative and emmenagogue-like effects In chemical studies on the constituents of sugar beet, betacyanins and phenolic compounds have been reported 2) and recently, several oleanolic acid glycosides were isolated from the leaves of this plant.

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Advances in Plant Glycosides, Chemistry and Biology, Proceedings of the International Symposium in Plant Glycosides by Chong-Ren Yang, Osamu Tanaka

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