摘要
Superacid ZrO_2:H_2SO_4 showed high activity in Friedel-Crafts benzoylation of benzene and substituted benzenes such an chlorobenzene,toluene and 1,3,5-trimethylbenzene.Benzophenones in 90-100% yields were obtained with catalytic amount of superacid ZrO_2:H_2SO_4.The calcination temperature greatly influenced the acid strength and activity of the superacid ZrO_2:H_2SO_4.The superacid has both Lewis and Bronsted acid sites.The reversibility of Friedel-Crafts benzoylation and transacylation were observed over the superacid.The used superacid could be readily regenerated and showed identical benzoylation activity to toluene.
Superacid ZrO_2:H_2SO_4 showed high activity in Friedel-Crafts benzoylation of benzene and substituted benzenes such an chlorobenzene,toluene and 1,3,5-trimethylbenzene.Benzophenones in 90-100% yields were obtained with catalytic amount of superacid ZrO_2:H_2SO_4.The calcination temperature greatly influenced the acid strength and activity of the superacid ZrO_2:H_2SO_4.The superacid has both Lewis and Bronsted acid sites.The reversibility of Friedel-Crafts benzoylation and transacylation were observed over the superacid.The used superacid could be readily regenerated and showed identical benzoylation activity to toluene.
