Patent · US Expired

Process for the hydroxylation of phenols and phenol ethers in the nucleus

US4045496A · kind A · utility

8Cited by

3References

20Claims

0Family size

Assignee

BAYER HEALTHCARE LLC · DE

Inventors

Hermann Seifert · Bensberg, DE
Helmut Waldmann · Leverkusen, DE
Wulf Schwerdtel
Wolfgang Swodenk

Key dates

Filing date	Feb 28, 1975
Grant date	Aug 30, 1977
Priority date	—
Expiry date	Feb 28, 1995

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY02P20/582
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

Abstract

A process for the hydroxylation of phenols and phenol ethers in the nucleus with hydrogen peroxide wherein a phenol or a phenol ether is reacted at the start of the reaction with substantially anhydrous hydrogen peroxide and wherein the reaction is carried out in the presence of a strong acid.

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