Process for the preparation of sulfonic acid chlorides

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

1977-07-19

1979-08-28

Schwartz, Gerald A.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

C07C14370

Patent

active

041660706

ABSTRACT:
A process for the preparation of a sulfonic 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 or cycloalkyl radical, halogen, aryl, aralkyl, aryl-ether or one of the radicals ##STR2## or where ADJACENT RADICALS R.sup.1 and R.sup.2 are linked to form a cycloaliphatic or aromatic carbocyclic ring which is optionally substituted by a sulfonic acid chloride group
Which comprises contacting an aromatic compound of the formula ##STR3## wherein R.sup.1, R.sup.2 and R.sup.3 have the previously assigned significance
With an approximately equimolar amount of a sulfonating agent, based upon the number of sulfonic acid chloride groups to be introduced and an excess of thionyl chloride, the sulfonating agent and thionyl chloride being initially introduced or added simultaneously with the addition of said aromatic compound.

REFERENCES:
patent: 3701806 (1972-10-01), Keogh et al.

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