Process for preparing a hydroxylamine pyrazole compound

US10377720B2 · kind B2 · utility

Assignee

• ADAMA MAKHTESHIM LTD. · IL

Inventors

• Gal Suez · Beer Sheva, IL
• Michael Grabarnick · Meitar, IL
• Alexander Frenklah · 'Anata, IL
• Heinz Steiner · Bubendorf, CH

Key dates

• Filing date: May 9, 2016
• Grant date: Aug 13, 2019
• Expiry date: May 9, 2036

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A01N43/56
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

A process for preparing, 2-[[[1-(4-chlorophenyl)-1H-pyrazol-3-yl]oxy]methyl]-N-hydroxy-benzenamine of formula (I) comprising: mixing 1-(4-chlorophenyl)-3-[(2 -nitrophenyl)methoxy]-1H-pyrazole of formula (II) with a nitrogen-containing base, a sulfur compound, a solvent and a platinum-based catalyst in the presence of hydrogen.