Process for preparing substituted benzoyl chlorides
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United States of America Patent
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Jan 18, 2005
Grant Date -
Jul 10, 2003
app pub date -
Oct 3, 2002
filing date -
Jul 26, 2000
priority date (Note) -
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Abstract
The present invention relates to a process for preparing substituted benzoyl chlorides of the formula (1) ##STR1## where R, x and y have the meaning given below, which comprises reacting a benzaldehyde of the formula (2) ##STR2## 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, NO.sub.2, CN, (C.sub.1 -C.sub.4)alkyl or (C.sub.1 -C.sub.4)alkoxy, or is halogen, NO.sub.2, CN, NR'.sub.2, OR', SO.sub.2 R', SO.sub.2 OR', COR' or CO.sub.2 R', where R' is an unbranched or branched C.sub.1 -C.sub.10 alkyl radical, an unsubstituted phenyl radical or a phenyl radical which is substituted by halogen, NO.sub.2, CN, (C.sub.1 -C.sub.4)alkyl or (C.sub.1 -C.sub.4)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.degree. C.
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