Hafnium (IV) Trifluoromethanesulfonate, An Efficient Catalyst for the Friedel-Crafts Acylation and Alkylation Reactions.

I Hachiya, M Moriwaki, S Kobayashi

Index: Hachiya, Iwao; Moriwaki, Mitsuhiro; Kobayashi, Shu Bulletin of the Chemical Society of Japan, 1995 , vol. 68, # 7 p. 2053 - 2060

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Citation Number: 100

Abstract

Hafnium (IV) trifluoromethanesulfonate (hafnium (IV) triflate, Hf (OTf) 4) was synthesized from hafnium tetrachloride and trifluoromethanesulfonic acid. The triflate thus prepared was found to be effective in the catalytic Friedel–Crafts acylation reactions of various substituted benzenes with acid anhydrides in lithium perchlorate–nitromethane (LiClO 4–MeNO 2). Lithium perchlorate–nitromethane is an excellent solvent system, and the catalytic activity ...