Process for preparing alkyl-(3-chlorophenyl)-sulphones

US5475142A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Stefan Antons · Leverkusen, DE
• Helmut Fiege · Leverkusen, DE
• Werner Bussmann · Leverkusen, DE
• Hartmut Richter · Langenfeld, DE

Key dates

• Filing date: Aug 10, 1994
• Grant date: Dec 12, 1995
• Expiry date: Aug 10, 2014

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C315/04
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

Alkyl-(3-chlorophenyl)-sulphones are particularly advantageously obtained by chlorination of alkylphenylsulphones if alkylphenylsulphones are chlorinated in molten form with elemental chlorine in the presence of iron(III) chloride and optionally iodine and/or sulphur.