Process for the preparation of paraoxadiazolyphenylboronic acids

US6197967A · kind A · utility

Assignee

• Clariant Corporation · DE

Inventors

• Frank Vollmueller · Mainz, DE
• Steffen Haber · Landau, DE
• Andreas Meudt · Hofheim, DE
• Antje Noerenberg · Büttelborn, DE
• Stefan Scherer · Büttelborn, DE

Key dates

• Filing date: Dec 13, 1999
• Grant date: Mar 6, 2001
• Expiry date: Dec 13, 2019

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07F5/025
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

Compounds of the formula (I) ##STR1## are prepared by reacting a compound of the formula (V) ##STR2## with a compound of the formula (X) ##STR3## and hydrolyzing the product; or converting the compound of the formula (V) into the hydrazide, and cyclizing and hydrolyzing the latter to give the oxadiazole. para-Oxadiazolylphenylboronic acids are valuable precursors for active ingredients.