An oxidative desymmetrization of isoindolines was realized by TBN initiated radical
sp3 C–H activation relay (CHAR), providing a series of ω-hydroxylactams in high yields.
This reaction exhibits broad substrate scope and functional group tolerance, and even
N-alkyl isoindolines can be well tolerated. The mechanistic study shows that the C–H
bond oxidation, dioxygen trapping and intramolecular 1,5-H shift might be the key
steps to achieve the oxidative desymmetrization.
Key words
radicals - C–H bond activation - oxidative desymmetrization -
tert-butyl nitrite - isoindolines