Process for preparing halogenated pyridine derivatives

US10875858B2 · kind B2 · utility

Assignee

• BAYER CROPSCIENCE AKTIENGESELLSCHAFT · DE

Inventors

• Marc Mosrin · Monheim, DE
• Ruediger Fischer · Pulheim, DE
• Dominik HAGER · Monheim, DE
• Laura HOFFMEISTER · Dressendorf, DE
• Nina Kausch-Busies · Bensberg, DE
• David Wilcke · Mülheim an der Ruhr, DE
• Matthieu WILLOT · Goldkronach, DE

Key dates

• Filing date: Aug 9, 2017
• Grant date: Dec 29, 2020
• Expiry date: Aug 9, 2037

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B01J2531/824
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

The present invention relates to a process for preparing halogenated pyridine derivatives of the formula (II) proceeding from compounds of the structure Q-H via intermediates of the formula (IIIa) or (IIIb) in which where the symbol # indicates the bond to the rest of the molecule and A, Q1, Q2, Q3, Q4, Q5 and Q6 have the definitions given in the description,