C - Chemistry – Metallurgy – 07 – C
Patent
C - Chemistry, Metallurgy
07
C
C07C 63/06 (2006.01) C07C 51/15 (2006.01) C07C 51/56 (2006.01) C07C 51/60 (2006.01) C07C 63/70 (2006.01) C07F 9/53 (2006.01)
Patent
CA 2160307
The invention relates to a process for the preparation of polyalkylated aromatic carboxylic acids of formula I Image (I) wherein R1, R2, R3, R4 and R5 are each independently of one another hydrogen, C1-C20alkyl, halogen or C5-C8cycloalkyl, with the proviso that at least two of the substituents R1, R2, R3, R4 or R5 are alkyl and/or cycloalkyl, by reacting corresponding aromatic hydrocarbons with carbon dioxide, which reaction is carried out observing special ratios of temperature and pressure. The invention furthermore relates to a one-pot process for the preparation of the corresponding acyl halides.
Holer Martin
Husler Rinaldo
Orban Ivan
Ciba Specialty Chemicals Holding Inc.
Fetherstonhaugh & Co.
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