Method for producing substituted arylcarboxylic acid chlorides

Details Method for producing substituted arylcarboxylic acid chlorides Method for producing substituted arylcarboxylic acid chlorides

2004-07-14

2009-02-24

Sullivan, Daniel M (Department: 1621)

Organic compounds -- part of the class 532-570 series

Organic compounds

Carboxylic halides

C562S856000

Reexamination Certificate

active

07495130

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 CCl4in 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.

REFERENCES:
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patent: 3691217 (1972-09-01), McCann
patent: 4276231 (1981-06-01), Bockmann et al.
patent: 0 009 205 (1980-04-01), None
patent: 0 554 679 (1993-08-01), None
patent: 0 706 987 (1996-04-01), None

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