Abstract
A study was carried out on the electrophilic substitution reactions of benzene and toluene by the action of a mixture of an acyl halide and benzaldehyde in the presence of trivalent lanthanide salts LnCl3, where Ln=Ce, Dy, Er, Sm, Yb, and Yb(O3SCF3)3, as catalysts at 40‡C over 24 h. The reaction stops at the formation of the corresponding triarylmethane compounds. A mechanism was proposed for this reaction. Lanthanide salts were found not to catalyze the usual Friedel-Crafts acylation of arenes.
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Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 3, pp. 708–710, March, 1990.
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Davydov, D.V., Vinogradov, S.A. & Beletskaya, I.P. Catalytic activity of trivalent lanthanide salts in the alkylation reactions of aromatic hydrocarbons by the action of a mixture of an acyl halide and benzaldehyde. Russ Chem Bull 39, 629–630 (1990). https://doi.org/10.1007/BF00959603
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DOI: https://doi.org/10.1007/BF00959603