Patent · US Expired

Method for producing ortho-alkylated benzoic acid derivatives

US6515143B2 · kind B2 · utility

0Cited by

3References

3Claims

0Family size

Assignee

MERCK KGAA · DE

Inventors

Ekkehard Bartmann · Langen (Hessen), DE
Ingeborg Stein · Langen (Hessen), DE

Key dates

Filing date	Jan 8, 2002
Grant date	Feb 4, 2003
Priority date	—
Expiry date	Jan 8, 2022

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY02W30/91
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

Abstract

The invention relates to a process for the preparation of ortho-alkylated benzoic acid derivatives of the formula I characterized in that an aryl bromide of the formula II is reacted with a secondary or tertiary organolithium compound and CO2.

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