Patent · US Expired

Method for producing substituted arylcarboxylic acid chlorides

US7495130B2 · kind B2 · utility

4Cited by

3References

11Claims

0Family size

Assignee

BASF SE

Inventors

Matthias Maase · Speyer, DE
Gerhard Bertlein · Trochtelfingen, DE
Holger Ganz · Ludwigshafen, DE
Matthias Dust · Ludwigshafen, DE

Key dates

Filing date	Jul 14, 2004
Grant date	Feb 24, 2009
Priority date	—
Expiry date	Nov 19, 2024

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC07C51/58
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

Abstract

A process for preparing mono- or poly-C1-C20-alkyl- and/or -halogen-substituted arylcarbonyl chlorides (I), by, in a first stage, reacting a mono- or poly-C1-C20-alkyl- and/or -halogen-substituted aromatic (II) with CCl4 in the presence of a Friedel-Crafts catalyst to give the corresponding mono- or poly-C1-C20-alkyl- and/or -halogen-substituted trichloromethylated aromatic (III),and, in a second stage, treating the trichloromethylated aromatic (III) with water or a protic acid in the presence of a catalyst to obtain the arylcarbonyl chloride (I).In a particularly preferred embodiment, the trichloromethylated aromatic (III) is not isolated as an intermediate and is used in the second stage dissolved in the solvent of the first stage.

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