Process for the preparation of triazolinones
AssigneeBayer Aktiengesellschaft
InventorsKarl-Heinz Linker, Wilhelm Haas, Kurt Findeisen, Hans-Joachim Diehr
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Abstract
The invention relates to a new process and new intermediates for the preparation of triazolinones of the general formula (I) ##STR1## in which R.sup.1 represents in each case optionally substituted alkyl or cycloalkyl and R.sup.2 represents amino or in each case optionally substituted alkyl, alkenyl, alkinyl, alkoxy, alkylamino, dialkylamino, cycloalkyl, cycloalkylalkyl or phenyl, and to new intermediates for the preparation of triazolinones, many of which are known and which can be used as intermediates for the preparation of herbicides and insecticides.
Claims5
A process for the preparation of triazolinone derivative of the formula ##STR45## wherein R.sup.1 represents alkyl having 1 to 6 carbon atoms which is optionally substituted by halogen, cyano or C.sub.1 -C.sub.4 -alkoxy, or represents a cycloalkyl having 3 to 6 carbon atoms which is optionally substituted by halogen, cyano or C.sub.1 -C.sub.4 -alkyl and
- R.sup.2 represents amino, or represents alkyl, alkenyl, alkinyl, alkoxy, alkylamino or dialkylamino, each of which has up to 6 carbon atoms in the alkyl, alkenyl or alkinyl groups and each of which is optionally substituted by halogen, cyano or C.sub.1 -C.sub.4 -alkoxy, or represents C.sub.3 -C.sub.6 -cycloalkyl, C.sub.3 -C.sub.6 -cycloalkyl-C.sub.1 -C.sub.2 -alkyl or phenyl, each of which is optionally substituted by halogen, cyano, C.sub.1 -C.sub.4 -alkyl, C.sub.1 -C.sub.4 -alkoxy or C.sub.1 -C.sub.4 -alkoxy-carbonyl;
- which comprises reacting an alkylsulphonyltriazole derivative of the formula ##STR46## R.sup.1 and R.sup.2 have the abovementioned meanings and R.sup.3 represents alkyl
- with aqueous alkali metal hydroxide solution at temperatures between 0.degree. C. and 100.degree. C. under atmospheric pressure followed by acidifying the resulting product.
Dependencies are inferred from the claim text.