Isolation and structure elucidation of lobophytosterol, depresosterol and three other closely related sterols
作者:S. Carmely、Y. Kashman
DOI:10.1016/s0040-4020(01)88896-7
日期:1981.1
A series of polyoxygenated sterols were isolated from the softcoral Lobophytum depressum. The structure of five of these sterols was elucidated and determined to be. 5β,6β - epoxy - 24ξ - methylchloestan -3β, 22(R),25-triol (2a), 22(R),28 - oxido - 24ξ - methylcholest - 5 - en - 3β,25,28 - triol (1c, lobophytosterol), 24ξ -methyl - cholest - 5 22(R),25,28 - tetraol (1b, depresosterol), and 5β,6β -
从软珊瑚Lobophytum depressum中分离了一系列多氧化固醇。阐明并确定了其中五种固醇的结构。5β,6β-环氧-24ξ-甲基chloestan-3β,22(R),25-三醇(2a),22(R),28-氧化-24ξ-甲基胆甾-5-en-3β,25,28-三醇(1c,植物油甾醇),24ξ-甲基-胆甾醇-5 22(R),25,28-四醇(1b,去甲固醇)和5β,6β-植物甾醇和去甲固醇的环氧衍生物,分别是Tcompounds 2c和2b。主要根据完全解释的1 H和13确定结构13 C NMR谱图以及质谱图和一些化学转化导致结构清晰。所有鉴定出的化合物均属于C 28类别,并且是具有各种氧化态的C 28原子的海洋甾醇的第一个实例。