Process for the preparation of sulphonic acid chlorides

Details Process for the preparation of sulphonic acid chlorides Process for the preparation of sulphonic acid chlorides

1980-04-21

1982-02-23

Killos, Paul J.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

C07C14326

Patent

active

043168620

ABSTRACT:
An improved process for the preparation of a sulphonic acid chloride of the formula ##STR1## wherein R.sup.1, R.sup.2 and R.sup.3 are identical or different and denote hydrogen, a lower alkyl radical or a cycloalkyl radical, halogen, aryl, aralkyl, aryl ether or a radical --SO.sub.2 Cl, --SO.sub.2 aryl, ##STR2## or wherein adjacent radicals R.sup.1 and R.sup.2 are linked to form a cycloaliphatic, aromatic or hetero-aromatic ring which is optionally substituted by a sulphonic acid chloride group by contacting an aromatic compound of the formula ##STR3## wherein R.sup.1, R.sup.2 and R.sup.3 of the above-mentioned meaning, with chlorosulphonic acid and thionyl chloride, the improvement residing in employing initially approximately stoichiometric amounts of aromatic compound and chlorosulphonic acid, effecting reaction of the aromatic compound and chlorosulphonic acid and thereafter contacting the reaction product with excess thionyl chloride.

REFERENCES:
patent: 4105692 (1978-08-01), Blank
patent: 4215071 (1980-07-01), Blank et al.

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