Metal-free hydroarylation of alkynes: A very convenient, simple procedure for substituted arylalkenes
Hydroarylation of aryl-substituted alkynes with simple and substituted arenes was conducted in the presence of trifluoroacetic acid in dichloromethane without any metal catalysts or additives. Electron-rich arenes coupled with aryl-substituted alkynes to give 1,1-diarylalkenes in good to high yields. Georg Thieme Verlag Stuttgart.