Preparation of N-hydroxyazoles
AssigneeBASF SE
InventorsKlaus H. von Locquenghien, Wolfgang Hoelderich, Ulf Baus, Wolfgang Reuther, Erwin Hahn
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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.
Claims5
A process for the preparation of an N-hydroxyazole of the formula I ##STR8## where A is ##STR9## and R.sup.1, R.sup.2 and R.sup.3 are each hydrogen, C.sub.1 -C.sub.4 -alkyl or halogen, wherein an azole of the formula II ##STR10## 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.
Dependencies are inferred from the claim text.