Copper Powder–Catalyzed C-N Bond Formation of Arylhydrazones of 2-Bromobenzaldehydes Leading to 1-Aryl-1<i>H</i>-indazoles
作者:Hye Kyung Lee、Chan Sik Cho
DOI:10.1080/00397911.2011.614714
日期:2013.2.1
Arylhydrazones of 2-bromobenzaldehydes and its analogs are cyclized in PEG-400 at 110 degrees C in the presence of a catalytic amount of copper powder along with NaOtBu to give 1-aryl-1H-indazole derivatives in good yields.