Regioselective oxidation of indoles to 2-oxindoles
作者:Santosh V. Shelar、Narshinha P. Argade
DOI:10.1039/c9ob00764d
日期:——
Facile regioselective oxidation of indoles to 2-oxindoles promoted by sulfuric acid adsorbed on silica gel is reported. The demonstrated practical site-selective heterogeneous oxidation reactions conveniently take place with a broad substrate scope and functional group tolerances. The present oxidation strategy is also employed to accomplish the total synthesis of natural products donaxaridine and