Patent · US Active

Process for preparing 2,6-dialkylphenylacetic acids

US11691938B2 · kind B2 · utility

0Cited by

2References

5Claims

0Family size

Assignee

BAYER HEALTHCARE LLC · DE

Inventors

Thomas Himmler · Odenthal, DE
Dirk Brohm · Mettmann, DE
Wahed Ahmed Moradi · Monheim, DE

Key dates

Filing date	Apr 3, 2019
Grant date	Jul 4, 2023
Priority date	—
Expiry date	Apr 3, 2039

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC07F3/02
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

Abstract

The invention relates to a multi-stage process for preparing 2,6-dialkylphenylacetic acids of the general formula (I) by reacting 2,6-dialkylbromobenzenes with (1) magnesium, (2) a formamide, (3) an acid, (4) hydrogenation of the benzaldehyde obtained, (5) activation of the benzyl alcohol obtained, (6) cyanation of the activated benzyl alcohol and (7) hydrolysis of the nitrile obtained.

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