A Synthesis of 1<i>H</i>-Indazoles via a Cu(OAc)<sub>2</sub>-Catalyzed N–N Bond Formation
作者:Cheng-yi Chen、Guangrong Tang、Fengxian He、Zhaobin Wang、Hailin Jing、Roger Faessler
DOI:10.1021/acs.orglett.6b00611
日期:2016.4.1
facile synthesis of 1H-indazoles featuring a Cu(OAc)2-catalyzed N–N bond formation using oxygen as the terminal oxidant is described. The reaction of readily available 2-aminobenzonitriles with various organometallic reagents led to o-aminoaryl N–H ketimine species. The subsequent Cu(OAc)2-catalyzed N–N bond formation in DMSO under oxygen afforded a wide variety of 1H-indazoles in good to excellent
描述了一种容易合成的1 H-吲唑,其特征在于使用氧作为末端氧化剂,形成Cu(OAc)2催化的N–N键形成。易于获得的2-氨基苯甲腈与各种有机金属试剂的反应产生了邻氨基芳基NH酮亚胺。随后在氧气下在DMSO中形成Cu(OAc)2催化的N–N键,从而以良好或极好的收率提供了多种1 H-吲唑。