Tris(4-bromophenyl)aminium Hexachloroantimonate as a “Waste-Utilized”-Type Initiator-Promoted C–H Chlorination via C–H Activation Relay: Synthesis of Chlorinated Pyrroles
Using tris(4-bromophenyl)aminium hexachloroantimonate as a “waste-utilized”-type initiator, the aerobic oxidation of the sp3 C–H bond of proline esters was realized via C–H activation relay, giving a series of halogenated pyrroles in high yields. The mechanistic study revealed that the counterion, SbCl6–, was involved in the radical chlorination process, which provides a new way to understand the role
C−H Bond Activation Relay (CHAR) of Proline Ester Derivatives Promoted by In Situ Triarylamine Radical Cation: Selective Synthesis of 4‐Bromopyrrole Derivatives
A C−H activation relay (CHAR) of proline esters was realized by the in situ generated tris(4-bromophenyl)amine radical cation, selectively constructing the skeleton of 4-bromopyrrole under mild reaction conditions.