Process for the preparation of 3-nitrobenzenesulfonyl chloride

US5436370A · kind A · utility

Assignee

• Hoechst GmbH · DE

Inventors

• Michael Meier · Frankfurt am Main, DE
• Reinhard Wagner · Seekirchen am Wallersee, AT

Key dates

• Filing date: Sep 2, 1992
• Grant date: Jul 25, 1995
• Expiry date: Sep 2, 2012

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C303/12
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

In a method for preparing 3-nitrobenzene sulphonic acid chloride from nitrobenzene and chlorosulphonic acid, nitrobenzene is reacted with chlorosulphonic acid at approximately 90.degree. to approximately 120.degree. C. and an inorganic acid chloride is then allowed to act on the resultant reaction mixture at approximately 40.degree. to approximately 90.degree. C.