title: New bile alcohols - synthesis of (22R)- and (22S)-5beta-cholestane-3alpha,7alpha,12alpha,22,25-pentols.
abstract: The synthesis of (22R)- and (22S)-5beta-cholestane-3alpha,7alpha,12alpha,22,25-pentols is described. Bisnorcholyl aldehyde was prepared from cholic acid and converted into the cholestane-pentols by a Grignard reaction with 3-methyl-3-(tetrahydropyran-2-yloxy)-butynylmagnesium bromide followed by hydrogenation and acid hydrolysis. One of the synthetic pentols, the 22R-isomer was identical with a metabolite of 5beta-cholestane-3alpha,7alpha,25-triol formed in the rabbit.
mesh_terms: D000818:Animals; D001646:Bile / Q000378:metabolism*; D008401:Gas Chromatography-Mass Spectrometry; D006801:Humans; D009682:Magnetic Resonance Spectroscopy; D009904:Optical Rotation; D011817:Rabbits; D013055:Spectrophotometry, Infrared; D013261:Sterols / Q000096:biosynthesis*; D014973:Xanthomatosis / Q000378:metabolism
chemical_list: D013261:Sterols