Process for preparing phosphorus containing cyanohydrins

US9850263B2 · kind B2 · utility

Assignee

• BAYER CROPSCIENCE AKTIENGESELLSCHAFT · DE

Inventors

• Hans-Joachim Ressel · Hattersheim, DE
• Kilian Tellman · Cologne, DE
• Mark James Ford · Nordenstadt, DE
• Martin Littmann · Middletown, US
• Friedrich August Muehlthau · Kelkheim, DE
• Guenter Schlegel · Leverkusen, DE

Key dates

• Filing date: May 8, 2015
• Grant date: Dec 26, 2017
• Expiry date: May 8, 2035

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07F9/301
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

The present invention relates primarily to a process for preparing certain phosphorus-containing cyanohydrins of the formula (I), and also to certain phosphorus-containing cyanohydrins per se and to their use for the preparation of glufosinate and/or glufosinate salts. The present invention further relates to certain mixtures particularly suitable for preparing the phosphorus-containing cyanohydrins of the formula (I).