Ultrasound assisted remote functionalization of non-activated carbon atoms: efficient in situ formation of tetrahydrofurans by sonolysis of bromohydrins with (diacetoxyiodo)benzeneI2
1999
Abstract Ultrasonic irradiation of bromohydrins in the presence of (diacetoxyiodo)benzene and I 2 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.
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