Patent · US Expired

Process for the preparation of benzoic acid derivatives

US4851160A · kind A · utility

3Cited by

0References

4Claims

0Family size

Assignee

BAYER HEALTHCARE LLC · DE

Inventors

Uwe Petersen · Leverkusen, DE
Michael Schriewer · Odenthal, DE
Ernst Kysela · Bensberg, DE
Klaus Grohe · Odenthal, DE

Key dates

Filing date	Aug 28, 1987
Grant date	Jul 25, 1989
Priority date	—
Expiry date	Aug 28, 2007

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC07C51/60
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

Abstract

A process for the preparation of a compound of the formula ##STR1## in which X.sup.1 and X.sup.2 each independently is chlorine or fluorine, and PA1 Y is chlorine, bromine, fluorine or iodine, comprising subjecting a compound of the formula ##STR2## to a Sandmeyer or Balz-Schiemann reaction thereby to produce a carboxylic acid of the formula ##STR3## and converting the carboxylic acid (Ia) into an acyl chloride of the formula ##STR4## The compound (II) is new. The products are known intermediates for anti-bacterials.

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