Process for ring-chlorination of aromatic hydrocarbons

Details Process for ring-chlorination of aromatic hydrocarbons Process for ring-chlorination of aromatic hydrocarbons

1991-02-06

1992-04-14

Lone, Werren B.

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

Organic compounds

Halogen containing

570190, 570206, 570207, 570208, 570209, C07C 1712, C07C 2500

Patent

active

051050366

ABSTRACT:
Aromatic hydrocarbons monosubstituted by straight-chain or branched C.sub.1 -C.sub.12 -alkyl or by Chd 3-C.sub.8 -cycloalkyl can be chlorinated in the aromatic ring in the liquid phase in the presence of Friedel-Crafts catalysts if cyclic amidines which are oxy-sustituted on the exocyclic N atom are employed as co-catalysts. An increased proportion of the p-isomer is obtained in this reaction.

REFERENCES:
patent: 4748287 (1988-05-01), Rohlk et al.
patent: 4851596 (1989-07-01), Mais et al.
patent: 4925994 (1990-05-01), Mais et al.
patent: 4990707 (1991-02-01), Mais et al.

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