29786-97-8Relevant academic research and scientific papers
Catalytic Friedel-Crafts Acylation Reactions Using Hafnium Triflate as a Catalyst in Lithium Perchlorate-Nitromethane
Hachiya, Iwao,Moriwaki, Mitsuhiro,Kobayashi, Shu
, p. 409 - 412 (2007/10/02)
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 250,000percent based on the catalyst.Various substituted benzenes reacted with acid annhydrides in the presence of a catalytic amount of Hf(OTf)4 to give the corresponding aromatic ketones in high yields.
Addition conjuguee d'organometalliques sur des mesitylcetones α-ethyleniques
Barbot, F.,N'Goma, D.,Miginiac, Ph.
, p. 277 - 286 (2007/10/02)
Reactions of α-ethylenic mesitylketones with a series of organometallic compounds including allylic orgnometallics and organolithium compounds proceed via exclusive conjugated additions as a result of the steric congestion of the carbonyl of these ketones
