Process for the preparation of 4,5-dichloro-1,2-dithiacyclopenten-3-one

US4447623A · kind A · utility

Assignee

• Cassella Aktiengesellschaft · DE

Inventors

• Rolf Muller · Karben, DE
• Herbert Wille · Frankfurt, DE

Key dates

• Filing date: Sep 24, 1982
• Grant date: May 8, 1984
• Expiry date: Sep 24, 2002

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07D339/04
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

An improved process for preparation of 4,5-dichloro-1,2-dithia-cyclopenten-3-one of the formula ##STR1## by reacting hexachloroprene with sulphur at elevated temperatures, wherein the improvement comprises hydrolyzing by-product sulphur chlorides by conducting the reaction in the presence of water.