作者:Liu, Rui、Zhu, Yong-ming、Qin, Lie-na、Ji, Shun-jun、Katayama, Haji
DOI:——
日期:——
A Novel Synthesis of 2-Aryl-2<i>H</i>-indazoles via a Palladium-Catalyzed Intramolecular Amination Reaction
作者:Jinhua J. Song、Nathan K. Yee
DOI:10.1021/ol990409x
日期:2000.2.1
[reaction: see text] A variety of 2-aryl-2H-indazoles were synthesized by the palladium-catalyzed intramolecular amination of the corresponding N-aryl-N(o-bromobenzyl)hydrazines. Of several sets of reaction conditions surveyed, the combination of Pd(OAc)2/dppf/tBuONa gave the best results. This method applies to a wide scope of substrates containing electron-donating and electron-withdrawing substituents