Process for the preparation of oxiranes

US4898954A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Karl H. Mohrmann · Bensberg, DE
• Wolf Reiser · Wuppertal, DE
• Siegfried W. Linke · Wuppertal, DE
• Rudolf Zerbes · Wuppertal, DE

Key dates

• Filing date: Sep 3, 1985
• Grant date: Feb 6, 1990
• Expiry date: Sep 3, 2005

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07D303/08
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

A process for the preparation of oxiranes is disclosed in which trimethylsulphonium methyl sulphate, formed by treating dimethyl sulphide with dimethyl sulphate in the presence of tert.-butanol, is reacted, without previous isolation, with a ketone in the presence of a base and in the presence of tert.-butanol. The resultant oxiranes are useful in the preparation of plant growth regulants and fungicides.