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
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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 ...
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