Preparation of 3-sulphenylmaleimides

US4874874A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Engelbert Kule · Bensberg, DE
• Alfons Adler · Cologne, DE

Key dates

• Filing date: Oct 26, 1987
• Grant date: Oct 17, 1989
• Expiry date: Oct 26, 2007

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A01N47/02
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

A process for the preparation of a 3-sulphenylmaleimide of the formula ##STR1## in which R.sup.1 is alkyl, or optionally substituted cycloalkyl or aralkyl, and PA0 R.sup.2 is optionally substituted alkyl, cycloalkyl, aryl or aralkyl, comprising reacting a 3-sulphenylsuccinimide of the formula ##STR2## with an equimolar amount of hydrogen peroxide in the presence of a lower alkanecarboxylic acid. The compounds are fungicidal and those are new where R.sup.2 is not alkyl, or where R.sup.1 is not alkyl while R.sup.2 is optionally substituted phenyl.