| 摘要 |
A monoalkylaromatic hydrocarbon is haloethylated to a 1-halo-1-arylethane with minimal co-formation of diarylalkane by-product by reacting it with hydrogen chloride or bromide and acetaldehyde at a temperature in the range of abaout +10 DEG C. to about -35 DEG C. in the presence of at least about 1.4 mols of hydrogen sulfate per mol of the aromatic hydrocarbon and in the absence of more than about 15% by weight of water, based on the weight of the hydrogen sulfate; the temperature being not higher than about -10 DEG C. when hydrogen chloride is employed.
|
