Aprotic organic superacids

The formation of l-acetyl-2-methylcyclopentene was also observed when either cyclohexane or cyclopentene was reacted by Vol pin and coworkers with an excess of the aprotic organic superacid MeCOCl—2AlBr3 130131... 

Lewis superacids, such as SbF5, AsF5, PF5, TaF5, NbF5, BF3, tris(pentafluoro-phenyl) borane, boron tris(trifluoromethanesulfonate), and aprotic organic superacids developed by Vol pin and co-workers. 

The superelectrophilic AcBr- AlBr3 complexes, called aprotic organic superacids developed by Vol pin and co-workers,119,120 were used in the isomerization of C12H2o tricyclanes with the main component being perhydroacenaphthene to dimethyl- and ethyladamantanes121 [Eq. (5.51)]. 

The one-step double functionalization of aromatics—that is, alkylation and acylation—can be accomplished with alkanes or cycloalkanes (in large excess) using the aprotic organic superacids RCO+Al2X7 (R = alkyl, aryl, X = Cl, Br)391 [Eq. (5.152)]. However, the method can be used only for benzene and bromobenzene. 

Akhrem and co-workers417 have successfully applied aprotic organic superacids in the carbonylation of a series of alkanes. Butane was transformed into isomeric carboxylic acids depending on the superelectrophilic reagent and isolated as the... 

Substitution reactions, aromatic, hydrogen isotope effects in, 2, 163 Substitution reactions, bimolecular, in protic and dipolar aprotic solvents, 5, 173 Sulphur, organic oxyacids of, and their anhydrides, mechanisms and reactivity in reactions of, 17, 65 Superacid systems, 9, 1... 

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