Process for preparing substituted benzoyl chlorides

Details Process for preparing substituted benzoyl chlorides Process for preparing substituted benzoyl chlorides

2005-01-18

2005-01-18

Richter, Johann (Department: 1621)

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

Organic compounds

Carboxylic halides

C562S862000, C562S863000

Reexamination Certificate

active

06844468

ABSTRACT:
The present invention relates to a process for preparing substituted benzoyl chlorides of the formula (1)where R, x and y have the meaning given below, which comprises reacting a benzaldehyde of the formula (2)where R, independently of each other, is identical or different and is an unsubstituted phenyl radical or a phenyl radical that is substituted by halogen, NO2, CN, (C1-C4)alkyl or (C1-C4)alkoxy, or is halogen, NO2, CN, NR′2, OR′, SO2R′, SO2OR′, COR′ or CO2R′, where R′ is an unbranched or branched C1-C10alkyl radical, an unsubstituted phenyl radical or a phenyl radical which is substituted by halogen, NO2, CN, (C1-C4)alkyl or (C1-C4)alkoxy, x is 1 or 2 and y is 1, 2 or 3, with a chlorinating agent in the presence of a free-radical initiator and a solvent at from −20 to +200° C.

REFERENCES:
patent: 3274242 (1966-09-01), Etherington, Jr. et al.
patent: 5599981 (1997-02-01), Fushimi et al.
patent: 5872291 (1999-02-01), Koshikawa et al.
patent: 2 061 257 (1981-05-01), None

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