Synthesis of quinolines from the Baylis–Hillman acetates via the oxidative cyclization of sulfonamidyl radical as the key step

Ethyl 3-quinolinecarboxylates 5 were synthesized in good to moderate yields from the Baylis–Hillman acetates 1 via the oxidative cyclization reaction of the N-tosylamidyl radical, which was generated from the rearranged tosylamide derivatives 2 by iodobenzene diacetate and iodine.