Preparation of substituted pyrroles via Ru(II)-catalyzed coupling of alkynes with enamides
作者:Kaliyappan Murugan、Shiuh-Tzung Liu
DOI:10.1016/j.tetlet.2013.03.013
日期:2013.5
An efficient ruthenium-catalyzed oxidative cyclization of enamides with alkynes in water or dimethoxyethane leading to the pyrrole derivatives is reported. Typically, a mixture of ethyl 2-(acetylamino)acrylate, diphenylacetylene, [Ru(p-cymene)Cl2] (2 mol %), KPF6, and Cu(OAc)2 in water was heated under refluxing conditions providing the N-acetylated pyrrole product in 95% yield.
报道了在水或二甲氧基乙烷中,炔与炔烃的有效钌催化氧化环化反应,生成吡咯衍生物。通常,将2-(乙酰氨基)丙烯酸乙酯,二苯乙炔,[Ru(对-cymene)Cl 2 ](2 mol%),KPF 6和Cu(OAc)2的混合物在水中加热回流,得到N -乙酰化的吡咯产物,产率为95%。