Copper-catalyzed one-pot synthesis of tetrasubstituted pyrazoles from sulfonyl azides, terminal alkynes, and hydrazonoyl chlorides
作者:Issa Yavari、Manijeh Nematpour、Sima Yavari、Fatemeh Sadeghizadeh
DOI:10.1016/j.tetlet.2012.01.083
日期:2012.4
Ketenimine intermediates generated by the addition of copper acetylides to sulfonyl azides are trapped by nitrile imines (generated from hydrazonoyl chlorides and triethylamine) to afford tetrasubstituted pyrazoles in moderate to good yields.
通过将
乙炔铜加成至磺酰
叠氮化物而生成的酮
丁胺中间体被腈
亚胺(由chloride酰
氯和
三乙胺生成)捕获,以中等至良好的产率得到四取代的
吡唑。