Pd-catalyzed assembly of phenanthridines from aryl ketone O-acetyloximes and arynes through C–H bond activation
摘要:
Pd-catalyzed annulation of aryne and aryl ketone O-acetyloxime via C-H bond activation was realized. Through the C-H bond activation/insertion/cyclization/elimination reaction sequence, phenanthridines are successfully constructed, providing an attractive strategy to approach substituted heterocycle without preactivation of starting materials. Crown Copyright (C) 2013 Published by Elsevier Ltd. All rights reserved.
Copper-Mediated Multiple C–H Functionalization of Aromatic<i>N</i>-Heterocycles: Bromoamination of Indoles and Pyrroles
作者:Alex John、Kenneth M. Nicholas
DOI:10.1021/om300553b
日期:2012.11.26
A copper-mediated bromoamination of aromatic N-heterocycles has been achieved using oxime esters as the N-reagents under mild conditions (ca. 70 degrees C). The reaction with N-alkyl indoles proceeds regioselectively to produce the 2-amino-3-bromo indole derivatives as confirmed by X-ray crystallographic analysis of the brominated product, 3aa-Br. With N-methylpyrrole both the monobromoaminated and dibromoaminated products were produced by this method.