Efficient and selective hydroarylation of propiolic acids and their esters with arenes catalyzed by a PtCl2/AgOTf system
作者:Juzo Oyamada、Tsugio Kitamura
DOI:10.1016/j.tetlet.2005.03.179
日期:2005.5
PtCl2/AgOTf-catalyzed hydroarylation of ethyl propiolate proceeded effectively to give ethyl (2Z)-cinnamate derivatives in good to high yields, without the formation of diethyl (1E,3Z)-4-arylbuta-1,3-diene-1,3-dicarboxylates that was observed in Pd(OAc)2-catalyzed reaction. Especially, PtCl2/AgOTf-catalyzed hydroarylation of propiolic acids proceeded effectively to give (2Z)-cinnamic acids exclusively.
PtCl2/AgOTf 催化的丙炔酸乙酯的加氢芳基化有效地进行,以良好至高产率得到 (2Z)-肉桂酸乙酯衍生物,而没有形成 (1E,3Z)-4-arylbuta-1,3-diene-1,3 二乙基酯-在 Pd(OAc)2 催化反应中观察到的二羧酸盐。尤其是,PtCl2/AgOTf 催化的丙炔酸加氢芳基化有效地进行,仅得到 (2Z)-肉桂酸。