The metal ion modified ionic liquids promoted free-solvent alkylations of α-methylnaphthalene with long-chain olefins

Various ionic liquids enhanced free-solvent alkylations of α-methylnaphthalene with long-chain olefins have been investigated. It is found that the metal ion modified alkylpyridinium chloroaluminate ionic liquids (RPyBr-AlCl3), especially butylpyridinium chloroaluminate (BuPyBr-AlCl3, 0.71-0.75 molar fraction of aluminum trichloride) indicated excellent catalytic performance for the alkylations of α-methylnaphthalene.