Method for producing 7-(pyrazole-3-yl) benzoxazoles

US6888003B2 · kind B2 · utility

Assignee

• BASF SE

Inventors

• Cyrill Zagar · Ludwigshafen, DE
• Robert Reinhard · Schifferstadt, DE
• Michael Puhl · Hirschberg, DE
• Thorsten Volk · Mannheim, DE
• Norbert Gotz · Worms, DE
• Gerhard Hamprecht · Weinheim, DE
• Olaf Menke · Altleiningen, DE
• Ingo Sagasser · Schifferstadt, DE

Key dates

• Filing date: Mar 15, 2001
• Grant date: May 3, 2005
• Expiry date: Aug 5, 2021

Classification

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

Abstract

A process for preparing 7-(pyrazol-3-yl)benzoxazoles of the formula I in which the variables R1-R6 are as defined in claim 1, which process is characterized in that a 2-halo-3-(pyrazol-3-yl)anilide of the formula II, in which X is bromine or iodine is reacted with a base in the presence of a transition metal compound of subgroup VIIa, VIIIa or Ib of the Periodic Table of the Elements, is disclosed.