Reaction of some 4,6-dimethoxyindoles with nitric acid: nitration and oxidative dimerisation
作者:Tinnagon Keawin、Shuleewan Rajviroongit、David StC. Black
DOI:10.1016/j.tet.2004.11.026
日期:2005.1
range of 3-substituted-4,6-dimethoxyindoles bearing electron-withdrawing groups in either the 2- or 7-position, can be nitrated using nitricacid in acetonitrile, to give 7-nitro and 2-nitro-indoles, respectively. Those without electron-withdrawing groups undergo oxidative dimerisation at C7, if 2,3-disubstituted, and at C2, if N-methylated and unsubstituted at C2.