Method for production of Δ1-pyrrolines

US7250521B2 · kind B2 · utility

Assignee

• BAYER CROPSCIENCE AKTIENGESELLSCHAFT · DE

Inventors

• Udo Kraatz · Leverkusen, DE
• Andrew Plant · Grafton, GB
• Ernst Kysela · Bensberg, DE
• Albrecht Marhold · Leverkusen, DE

Key dates

• Filing date: Apr 8, 2002
• Grant date: Jul 31, 2007
• Expiry date: Jan 5, 2023

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07D207/20
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

2,5-Bisaryl-Δ1-pyrrolines of the formula (I)in whichAr1 and Ar2 are as defined in the descriptioncan be prepared byreacting aroylpyrrolidinones of the formula (II)in whichAr1 and Ar2 are as defined in the descriptionwith an acid, if appropriate in the presence of a diluent.