Process for the preparation of thiazole derivatives

US6677457B2 · kind B2 · utility

Assignee

• Syngenta Crop Protection AG · CH

Inventors

• Thomas Pitterna · Chur, CH
• Henry Szczepanski · Möhlin, CH
• Peter Maienfisch · Aesch, CH
• Ottmar Franz Huter · Bad Kötzting, DE
• Thomas Rapold · Laufenburg, CH
• Marcel Senn · Basel, CH
• Thomas Gobel · Lörrach, DE
• Anthony Cornelius O'Sullivan · Basel, CH
• Gottfried Seifert · Laufenburg, CH

Key dates

• Filing date: Jan 15, 2002
• Grant date: Jan 13, 2004
• Expiry date: Jan 15, 2022

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07D417/06
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

The invention relates to a process for the preparation of a compound of the formula wherein Q, Y, Z, R1, R2, R3, R4 and R5 are as defined in the specification, which comprisesa) reacting a compound of the formula  with a halogenating agent to form a compound of the formula orb) converting a compound of formula (II) by means of a halogenating agent into a compound of the formula optionallyc) converting the compound of formula (IV) into a compound of formula (III);d) converting a compound of formula (III) by means of a compound of the formula into a compound of the formula ore) converting a compound (IV) by means of a compound (V) into a compound (VI); andf) converting a compound (VI) by means of a chlorinating agent into a compound (I);a compound (IV); to a process for the preparation of a compound (III) and to a process for the preparation of a compound (IV).