The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 08, 1977
Filed:
Oct. 21, 1976
Applicant:
Inventor:
Rudolf Pistorius, Wehrheim, DT;
Assignee:
Hoechst Aktiengesellschaft, Frankfurt am Main, DT;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C / ;
U.S. Cl.
CPC ...
2606 / ; 204 72 ; 204 / ;
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.