title: Sterol synthesis. Syntheses of 15-oxygenated 5alpha, 14beta-cholest-7-en-3beta-ol derivatives.
abstract: Treatment of 3beta-benzoyloxy-14alpha, 15alpha-epoxy-5alpha-cholest-7-ene with boron trifluoride-etherate gave, in 43% yield, 3alpha-benzoyloxy-5alpha, 14beta-cholest-7-en-15-one with the unnatural C-D ring juncture. Reduction of the latter compound with lithium aluminum hydride gave 15alpha, 14beta-cholest-7-en-3beta, 15alpha-diol and 5alpha, 14beta-cholest-7-en-3beta, 15beta-diol in 9% and 81% yields, respectively.
mesh_terms: D002782:Cholestenes / Q000138:chemical synthesis*; D002783:Cholestenones / Q000138:chemical synthesis; D013261:Sterols / Q000138:chemical synthesis*
chemical_list: D002782:Cholestenes; D002783:Cholestenones; D013261:Sterols