Synthesis of Tri- and Tetrasubstituted Pyrazoles via Ru(II) Catalysis: Intramolecular Aerobic Oxidative C–N Coupling
作者:Jiantao Hu、Shi Chen、Yonghui Sun、Jing Yang、Yu Rao
DOI:10.1021/ol3022353
日期:2012.10.5
An unprecedented ruthenium(II)-catalyzed intramolecular oxidative C–N coupling method has been developed for the facile synthesis of a variety of synthetically challenging tri- and tetrasubstituted pyrazoles. Dioxygen gas is employed as the oxidant in this transformation. The reaction demonstrates excellent reactivity, functional group tolerance, and high yields.
已经开发出了空前的钌(II)催化的分子内氧化C-N偶联方法,可以轻松合成各种具有合成挑战性的三取代和四取代的吡唑。在该转化中,将氧气用作氧化剂。该反应显示出优异的反应性,官能团耐受性和高产率。