Triterpene Glycosides of Astragalus and Their Genins. LXVIII. Cycloorbigenin C, a New Cycloartane Genin
摘要:
The new triterpenoid cycloartane cycloorbigenin C, the structure of which is 23xi,24xi-cycloartan-3beta,6alpha,16beta,23,24,25-hexaol, was obtained from the aerial part of Astragalus orbiculatus Ledeb. (Leguminosae). The structure of cycloorbigenin C was proved using chemical transformations, IR spectroscopy, electron-impact mass spectrometry, and PMR and C-13 NMR spectra interpreted using J-modulation and the 2D NMR spectroscopies: H-1-H-1 COSY, TOCSY, ROESY, HSQC, and HMBC.
DOI:
10.1023/b:conc.0000011122.41260.98
作为产物:
描述:
cycloorbicoside D 在
硫酸 作用下,
以
甲醇 为溶剂,
反应 3.0h,
以450 mg的产率得到cycloorbigenin C
参考文献:
名称:
Triterpene Glycosides from Astragalus and Their Genins. LXXI. Cycloorbicoside D, a New Glycoside from Astragalus orbiculatus