3<i>H</i>-indolium salts efficiently prepared from<i>N</i>-substituted anilines and α-branched ketones by an one-pot synthesis
作者:Thomas Zimmermann、Ortwin Brede
DOI:10.1002/jhet.5570410117
日期:2004.1
and the α-branched ketones 3 the 3H-indolium salts 1 and their fused derivatives 13 are prepared by combining a sodium nitrite nitrosation, a zinc dust reduction, a hydrazoneformation and a Fischerindolization to a reaction sequence in which the isolation and purification of intermediates is not necessary. The scope and limitations of this effective one-potsynthesis are discussed.