Process for the preparation of aromatic sulfonyl chlorides

Details Process for the preparation of aromatic sulfonyl chlorides Process for the preparation of aromatic sulfonyl chlorides

1991-08-16

1992-08-04

Daus, Donald G.

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

562828, 562830, C07D26358

Patent

active

051360438

ABSTRACT:
A process for the preparation of aromatic sulfonyl chlorides of the formula I ##STR1## in which R.sub.1, R.sub.2 and R.sub.3 are identical or different and are hydrogen, fluorine, chlorine, bromine or iodine atoms, alkyl(C.sub.1 -C.sub.4), acetamido, nitro or carboxyl groups, or R.sub.1 and R.sub.2 together form an aromatic or heteroaromatic ring having 5 or 6 ring members, which can be substituted by fluorine, chlorine, bromine or iodine atoms, alkyl(C.sub.1 -C.sub.4), acetamido, nitro or carboxyl groups, by reaction of aromatic compounds of the formula II ##STR2## in which R.sub.1, R.sub.2 and R.sub.3 have the abovementioned meanings, with chlorosulfonic acid in excess or with chlorosulfonic acid or oleum and thionyl chloride, by reacting in the presence of sulfamic acid as a catalyst.

REFERENCES:
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patent: 3686300 (1972-08-01), Oten et al.
patent: 4316862 (1982-02-01), Schenk et al.
patent: 4339396 (1982-07-01), Rauchschwalbe et al.
Chem. Abstr. vol. 102 entry 134485v (1985).
"General Characteristics of Benzenesulfonic Acid Derivatives". In: Ullmann's Encyclopedia of Industrial Chemistry, 5th Ed., vol. A3, 1986, p. 513.
Bosshard, H. H. et al, Helv. Chimica Acta 42: 1653-1658 (1959).
Winnacker-Kuchler, Chemische Technologie 6:181-182, Carl Hauser-Verlag Munich Germany (4th ed 1982).
Gmelins Handbuch der Anorganischen Chemie 9:1583, Verlag Chemie GmbH, Weinheim, German (1963).

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