1: With palladium diacetate; trifluoroacetic acid in dimethyl sulfoxide T=100°C; 24 h; 2: With trifluoroacetic acid in dimethyl sulfoxide T=70°C; 2 h; Title compound not separated from byproducts;
参考文献
Journal of the American Chemical Society, , vol. 126, # 8 p. 2302 - 2303