Process for the ring chlorination of aromatic hydrocarbons

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

1989-10-26

1991-02-05

Lone, Werren B.

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

Organic compounds

Halogen containing

570206, 570207, 570208, 570209, C07C 1712

Patent

active

049907077

ABSTRACT:
Aromatic hydrocarbons which are monosubstituted by straight-chain or branched C.sub.1 -C.sub.12 -alkyl or by C.sub.3 -C.sub.8 -cycloalkyl can be chlorinated in the presence of Friedel-Crafts Catalysts in liquid phase on the aromatic ring if cyclic benzo-fused imines or benzo[f]-1,4-thiazepines are used as co-catalysts. This makes it possible to obtain a higher proportion of p-isomers.

REFERENCES:
patent: 4031147 (1977-06-01), Graham
patent: 4851596 (1989-07-01), Mais et al.
patent: 4925994 (1990-05-01), Mais et al.

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