Patent · US Expired

P-Benzoquinone diketals

US4082809A · kind A · utility

3Cited by

0References

2Claims

0Family size

Assignee

Hoechst GmbH · DE

Inventors

Rudolf Pistorius
Hans Millauer · Eschborn, DE

Key dates

Filing date	Apr 19, 1977
Grant date	Apr 4, 1978
Priority date	—
Expiry date	Apr 19, 1997

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC25B3/23
WIPO fieldSurface technology, coating
WIPO sectorChemistry

Abstract

P-Benzoquinone diketals of the formula ##STR1## wherein R is an alkyl group having from 1 to 4 carbon atoms or a halogen atom, preferably CH.sub.3, Cl or F. The diketals obtained may be converted into the corresponding p-quinones by acidic hydrolysis and are, consequently, valuable intermediates for the preparation of the latters as well as for the transformation into the corresponding hydroquinones, which in their turn may be used in known manner in photography, as stabilizers for monomers, as starting material for dyestuff preparation etc.

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