Palladium-Catalyzed <i>sp</i><sup>2</sup> and <i>sp</i><sup>3</sup> C–H Bond Activation and Addition to Isatin toward 3-Hydroxy-2-oxindoles
作者:Gang-Wei Wang、An-Xi Zhou、Jun-Jiao Wang、Rong-Bin Hu、Shang-Dong Yang
DOI:10.1021/ol402494e
日期:2013.10.18
The first Pd(II)-catalyzed C–Haddition to isatins by direct sp2/sp3 C–H bond activation for the construction of 3-substituted-3-hydroxy-2-oxindoles is reported. The bidentate nitrogen ligands were found to promote this reaction. Specifically, the preliminary bioassay indicated that 3-(5-chlorobenzoxazole)-3-hydroxy-N-benzyl-2-oxindole (2w) is a new inhibitor of human kidney cancer and hepatocellular