Preparation of N-hydroxyazoles

US5332830A · kind A · utility

Assignee

• BASF SE

Inventors

• Klaus Horchler von Locquenghien · Schifferstadt, DE
• Wolfgang Hoelderich · Bischofswerda, DE
• Ulf Baus · Dossenheim, DE
• Wolfgang Reuther · Neckargemünd, DE
• Erwin Hahn · Heidelberg, DE

Key dates

• Filing date: Mar 26, 1993
• Grant date: Jul 26, 1994
• Expiry date: Mar 26, 2013

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07D249/08
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

N-Hydroxyazoles of the general formula I ##STR1## where A is ##STR2## and R.sup.1, R.sup.2 and R.sup.3 are each hydrogen, C.sub.1 -C.sub.4 -alkyl or halogen, are prepared by a process in which an azole of the general formula II ##STR3## where A, R.sup.1, R.sup.2 and R.sup.3 have the abovementioned meanings, is reacted with hydrogen peroxide or an alkyl peroxide in the presence of a zeolite catalyst at from -20.degree. to 150.degree. C. and from 0.1 to 150 bar.