A mild radical cascade cyclization of N-arylacrylamides with diselenides for the preparation of oxindoles via iodine oxidation is disclosed, which provide an eco-friendly process for the construction of C–Se bond. 25 Examples of N-arylacrylamide substrates were investigated with excellent yields. Besides, the tandem cyclization of acrylamide with diphenyl disulfide was also applicable under the same condition.
A photoredox/nickel-catalyzed selective 1,4-arylsulfonation of 1,3-enynes to access structurally diverse sulfone-containing allenes has been established. This radical cascade transformation featured with easy manipulation, mild conditions, low catalyst loading, broad substrate...