Facile and General Synthesis of Quaternary 3-Aminooxindoles
作者:Stephen P. Marsden、Emma L. Watson、Steven A. Raw
DOI:10.1021/ol801028e
日期:2008.7.3
valuable quaternary 3-aminooxindole skeleton is reported on the basis of intramolecular arylation of enolates of substituted amino acids. The reaction tolerates dialkyl- and arylalkylamines as well as a range of carbon substituents (primary and secondary alkyl, aryl). The cyclization of N-indolyl-substituted substrates is accompanied by direct C-H arylation of the indole, leading to indolo-fused benzodiazepines
A robust, efficient catalyst system for enolate arylation leading to quaternary 3-aminooxindoles
作者:Emma L. Watson、Stephen P. Marsden、Steven A. Raw
DOI:10.1016/j.tetlet.2009.02.076
日期:2009.7
A catalyst screening programme has revealed that a combination of Pd(0) and the N-heterocyclic carbene ligand SIPr forms a particularly robust and efficient catalyst for the formation of important quaternary 3-aminooxindoles via intramolecular enolate arylation. Catalyst loadings of 0.1 mol % give complete conversion in under 4 h. (C) 2009 Elsevier Ltd. All rights reserved.