Processes for the preparation of pesticide compounds

US10233155B2 · kind B2 · utility

Assignee

• DOW AGROSCIENCES LLC · US

Inventors

• Erich J. Molitor · Midland, US
• Mark Muehlfeld · Midland, US
• Joseck M. Muhuhi · Midland, US
• Patrick T. McGough · Midland, US
• Gary Roth · Midland, US
• David E. Podhorez · Midland, US
• Christopher W. Derstine · Midland, US
• Stacie L. Santhany · Auburn, US

Key dates

• Filing date: Dec 22, 2017
• Grant date: Mar 19, 2019
• Expiry date: Dec 22, 2037

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07D231/38
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

This application relates to efficient and economical synthetic chemical processes for the preparation of pesticidal thioethers. Further, the present application relates to certain novel compounds useful in the preparation of pesticidal thioethers. Specifically, this application relates to a process for the preparation of 3-chloro-1H-pyrazol-4-amine and salts thereof. More particularly, this application relates to a process for the preparation of 3-chloro-1H-pyrazol-4-amine and salts thereof by halogenating and reducing 4-nitropyrazole.