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–H addition 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
据报道,通过直接的sp 2 / sp 3 C-H键活化,Pd(II)催化的CHs可以直接形成3-取代的3-羟基-2-羟基吲哚,并通过直接的sp 2 / sp 3的CH键活化。发现双齿氮配体促进该反应。具体地,初步的生物测定表明3-(5-氯苯并恶唑)-3-羟基-N-苄基-2-氧吲哚(2w)是人肾癌和肝细胞癌细胞的新抑制剂。而且,该反应体系表现出很大的官能团耐受性,并且不需要导向基团,额外的碱或添加剂。