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%。