Preparation of 3-hydroxyoxindoles with dimethyldioxirane and their use for the synthesis of natural products
作者:Oscar R. Suárez-Castillo、Maricruz Sánchez-Zavala、Myriam Meléndez-Rodríguez、Luis E. Castelán-Duarte、Martha S. Morales-Ríos、Pedro Joseph-Nathan
DOI:10.1016/j.tet.2006.01.036
日期:2006.3
This work describes a general protocol for the oxidation of indole and oxindole derivatives with dimethyldioxirane to give 3-hydroxyoxindoles present in many natural products. This strategy allowed us to synthesize the natural product 1, to carry out the first total synthesis of 4, a formal total synthesis of donaxaridine (5) and to achieve the synthesis of pyrroloindoline 8, a debromo analogue of the natural product flustraminol B (7). (c) 2006 Elsevier Ltd. All rights reserved.
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