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Ultrasound assisted remote functionalization of non-activated carbon atoms: eff...

Ultrasonic irradiation of bromohydrins in the presence of (diacetoxyiodo)benzene and I2 generates alkoxyl radicals which lead in situ to intramolecular hydrogen abstraction on the C-19 non-activated carbon atoms in steroids producing tetrahydrofurans selectively in very good yields. Photolysis was less effective in promoting such conversions. ; http://www.sciencedirect.com/science/article/B6THS-3YF4638-1R/1/...