Tetrahedron letters

Catalytic Friedel-Crafts acylation reactions using hafnium triflate as a catalyst in lithium perchlorate-nitromethane

I Hachiya, M Moriwaki, S Kobayashi

Index: Hachiya, Iwao; Moriwaki, Mitsuhiro; Kobayashi, Shu Tetrahedron Letters, 1995 , vol. 36, # 3 p. 409 - 412

Full Text: HTML

Citation Number: 113

Abstract

Catalytic Friedel-Crafts acylation reactions were performed by using hafnium trifluoromethanesulfonate (hafnium triflate, Hf (OTf) 4) as a catalyst. The catalytic activity of the Lewis acid catalyst was much improved in lithium perchlorate-nitromethane (LiClO4- MeNO2) and the yield was up to 250,000% based on the catalyst. Various substituted benzenes reacted with acid anhydrides in the presence of a catalytic amount of Hf (OTf) 4 ...