Preparative Method for the Quantitative Separation of Methylenic Sterols from Unsaturated Sterol Mixtures by Chemoselective Hydroxymercuration-Deoxymercuration
作者:Laïla El Kihel、Georges Charles
DOI:10.1055/s-2006-942495
日期:2006.8
intermediates were easily purified by flash chromatography on silica gel column and the reactive alkenes were regenerated by deoxymercuration in a biphasic system (ethyl acetate/I M HCl, 2:1 ratio). These conditions leave the ring double bonds of steroids intact. No isomerization of methylene double bonds was observed.
Isolation of Lanosta-8,25-dien-3β-ol from the fungus Fomes Fastuosus
作者:Amolak C. Jain、Sushil K. Gupta
DOI:10.1016/s0031-9422(00)80566-x
日期:1984.1
Abstract A new lanostane triterpene has been isolated from the fungus Fomes fastuosus which causes wood-rotting of Emblica officinalis . The compound is assigned the structure lanosta-8,25-dien-3β-ol on the basis of spectral data and correlation with lanosterol.