A Tandem Strategy for the Synthesis of 1<i>H</i>-Benzo[<i>g</i>]indazoles and Naphtho[2,1-<i>d</i>]isoxazoles from<i>o</i>-Alkynylarene Chalcones
作者:Sikkandarkani Akbar、Kannupal Srinivasan
DOI:10.1002/ejoc.201201576
日期:2013.3
o-Alkynylarene chalcones when treated with hydrazines and hydroxylamine in the presence of iodine gave 1H-benzo[g]indazoles and naphtho[2,1-d]isoxazoles, respectively. The transformations involve tandem oxidative cyclocondensation/electrophilic hydroarylation. The methodology was applied to quinoline-based chalcones, which also afforded the corresponding quinoline-fused benzindazole and benzisoxazole