✦ LIBER ✦

24-Methyl- and 24-ethyl-Δ24(25)-cholesterols as immediate biosynthetic precursors of 24-alkylsterols in higher plants

✍ Scribed by Junko Yamada; Masuo Morisaki; Keisuke Iwai; Hiroki Hamada; Naoka Sato; Yoshinori Fujimoto

Book ID: 104207391
Publisher: Elsevier Science
Year: 1997
Tongue: French
Weight: 615 KB
Volume: 53
Category: Article
ISSN: 0040-4020
DOI: 10.1016/s0040-4020(96)01008-3

No coin nor oath required. For personal study only.

✦ Synopsis

126,27-'3C,]-24-Methyl-A'4-cholesterol (1) and [26,27-"C*]-24-ethyl-A~~-cholesterol

(2) have been chemically synthesized to examine their ability as precursors of (24R)-and (24S)-24. methylcholesterols and (24R )-24.ethylcholesterol, respectively. Feeding of these tetra-substituted olefins to the tissue cultures of Curharonthu ~mu.~ and Oryzcr .wiw followed by 13C-NMR analysis of the biosynthesized sterols have demonstrated that the former rterol (1) was converted both into campesterol and dihydrobrassicasterol, and the latter sterol (2) into sitosterol. The results ruongly support that these A24-sterols are intermediates, most likely as immediate precursors, of 24-alkylsterols, in higher plants.

📜 SIMILAR VOLUMES

ChemInform Abstract: 24-Methyl- and 24-E

ChemInform Abstract: 24-Methyl- and 24-Ethyl-Δ24(25)-cholesterols as Immediate Biosynthetic Precursors of 24-Alkylsterols in Higher Plants.

✍ J. YAMADA; M. MORISAKI; K. IWAI; H. HAMADA; N. SATO; Y. FUJIMOTO 📂 Article 📅 2010 🏛 John Wiley and Sons ⚖ 31 KB 👁 1 views

ChemInform Abstract: 13C Assignment of D

ChemInform Abstract: 13C Assignment of Diastereotopic C-26 and -27 Methyl Groups of 24- Methylenecholesterol: Steric Course of Hydrogen Migration from C-24 to C-25 During Its Biosynthesis in Higher Plants.

✍ Y. FUJIMOTO; K. OHYAMA; N. SATO; J. YAMADA; M. MORISAKI 📂 Article 📅 2010 🏛 John Wiley and Sons ⚖ 27 KB 👁 1 views