69343-22-2Relevant academic research and scientific papers
Preparation of oxysterols by c–h oxidation of dibromocholestane with ru(Bpga) catalyst
Doiuchi, Daiki,Fujii, Yui,Hirai, Go,Igawa, Kazunobu,Makino, Kana,Takeda, Daiki,Tomooka, Katsuhiko,Uchida, Tatsuya,Yoritate, Makoto
supporting information, (2022/01/04)
Seven mono-and dihydroxycholesterols were prepared by direct C–H oxidation of the cholestane skeleton with a recently developed Ru(Bpga) catalyst (Ru(Bpga) = [RuCl (bpga) (PPh3 )] Cl; bpga = 2-(bis(pyridin-2-ylmethyl)amino)-N-(2,6-dimethylphenyl)acetamide)). Due to the high selectivity of the Ru(Bpga) complex for tertiary C–H, the reaction afforded a mixture of 25-, 20-, 17-, and 14-oxygenated cholesterols that could be easily separated by high-performance liquid chromatography. These results suggest that late-stage C–H oxidation could be a viable strategy for preparing candidate metabolites of biologically important molecules.
