Patent · US Expired

Process for the preparation of cyclohexane dione-(1,4)-tetramethyl diketal

US4161614A · kind A · utility

2Cited by

2References

5Claims

0Family size

Assignee

Hoechst GmbH · DE

Inventors

Elmar Konz · Kelkheim, DE
Rudolf Pistorius

Key dates

Filing date	Jan 24, 1978
Grant date	Jul 17, 1979
Priority date	—
Expiry date	Jan 24, 1998

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC07C2601/14
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

Abstract

Cyclohexanedione-(1,4)-tetramethyl diketal of the formula ##STR1## is obtained by catalytic hydrogenation of p-benzoquinone tetramethyl diketal in a basic medium, at a temperature of from about -10.degree. to +150.degree. C. The product gives cyclohexanedione-(1,4), on acid hydrolysis, which is a valuable starting product for various syntheses, for example for tetracyanoquinodimethane, a desired compound in the field of semiconductors. Hydroquinone dimethyl ether, which is a valuable intermediate for the dyestuff preparation, is obtained from cyclohexanedione-(1,4)-tetramethyl diketal by catalytic dehydrogenation.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.