Process for the manufacture of hydroquinone dimethyl ethers

Details Process for the manufacture of hydroquinone dimethyl ethers Process for the manufacture of hydroquinone dimethyl ethers

1976-10-21

1977-11-08

Helfin, Bernard

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

204 72, 204 59R, C07C 4100

Patent

active

040575861

ABSTRACT:
Hydroquinone dimethyl ethers of the formula ##STR1## wherein R is H, an alkyl group having from 1 to 4 carbon atoms or halogen ARE PREPARED BY CATALYTICAL HYDROGENATION OF BENZOQUINONE TETRAMETHYL DIKETALS OF THE FORMULA ##STR2## wherein R has the same meaning as in formula I at a temperature from about 0.degree. to +150.degree. C. As the starting compounds II may be obtained by anodic oxidation of benzene and the corresponding benzene derivatives in methanol hydroquinone dimethyl ethers I used, for example for the manufacture of dyestuffs, may be obtained in simple manner by using benzene or the corresponding benzene derivative as starting products.

REFERENCES:
patent: 1919580 (1933-07-01), Wagner et al.

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