Process for the preparation of substituted oxiranes and triazoles

US10053436B2 · kind B2 · utility

Assignee

• BASF AGRO B.V. · NL

Inventors

• Joachim Gebhardt · Monsheim, DE
• Manfred Ehresmann · Ludwigshafen, DE
• Tiziana Chiodo · Mannheim, DE
• Martin Viertelhaus · Ludwigshafen, DE
• Roland Goetz · Ludwigshafen, DE

Key dates

• Filing date: Jun 26, 2015
• Grant date: Aug 21, 2018
• Expiry date: Jun 26, 2035

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07D303/38
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

The present invention relates to a process for the preparation of oxirane compounds of formula II from keto compounds III using dimethyl sulfide (CH3)2S and dimethylsulfate (CH3)2SO4, forming the reagent IV, trimethylsulfonium methylsulfate [(CH3)3S+ CH3SO4−], in aqueous solution in the presence of potassium hydroxide (KOH).