Synthetic Studies on Psychotrimine: Palladium-Catalysed Arylation of 2-(N-Indolyl) Amides
摘要:
Through careful choice of conditions, 2-(N-indolyl) amides can be directed to undergo selectively either enolate arylation to give oxindoles or direct arylation to give indolo-fused benzodiazepines. The former chemistry facilitates the synthesis of the hexahydropyrrolindole core of psychotrimine.
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.