Haloethylation of aromatic hydrocarbons

Details Haloethylation of aromatic hydrocarbons Haloethylation of aromatic hydrocarbons

1989-10-10

1991-02-05

Lone, Werren B.

Organic compounds -- part of the class 532-570 series

Organic compounds

Halogen containing

570194, C07C 1714

Patent

active

049907042

ABSTRACT:
A monoalkylaromatic hydrocarbon is haloethylated to a 1-halo-1-arylethane with minimal co-formation of diarylalkane and acetaldehyde by-products by reacting it with hydrogen chloride or bromide and a stoichiometric deficit of acetaldehyde in the presence of sulfuric acid in an amount such as to provide at least two mols of hydrogen sulfate per mol of acetaldehyde and less than 1.5 mols of hydrogen sulfate per mol of the monoalkylaromatic hydrocarbon.

REFERENCES:
patent: 2516971 (1950-08-01), Galitzenstein et al.
patent: 3006953 (1961-10-01), Grosskinsky et al.
patent: 3069480 (1962-12-01), Hirth et al.
patent: 3658923 (1972-04-01), Stapp
March, "Advanced Organic Chemistry", Second Ed. McGraw-Hill, N.Y. (1977), pp. 501-502.
"Friedel-Crafts and Related Reactions", vol. 2, Interscience Publishers, N.Y. (1963-1964), pp. 659-784.

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