Synthesis of indazole-N-oxides via the 1,7-electrocyclization of azomethine ylides
作者:Miklós Nyerges、Andrea Virányi、Weimin Zhang、Paul W. Groundwater、Gábor Blaskó、László Tőke
DOI:10.1016/j.tet.2004.08.026
日期:2004.10
The first examples of the 1,7-electrocyclization of azomethine ylides onto a nitro group, to give benz-1,2,6-oxadiazepine intermediates are reported. Subsequent ring contraction results in the formation of indazole-N-oxides. (C) 2004 Elsevier Ltd. All rights reserved.