Jun Qiu and Ronghua Zhang
Org. Biomol. Chem., 2014,12, 4329-4334
DOI:
10.1039/C4OB00720D,
Communication
A novel transition-metal-free oxidative carboazidation of acrylamides using inexpensive NaN3 and K2S2O8 was achieved, which not only provided an efficient method to prepare various N3-substituted oxindoles, but also represented a novel strategy for C–N and C–C bond formation via a free-radical cascade process. This transformation exhibits excellent functional group tolerance, affording the desired oxindoles in good to excellent yields.