Bayer Aktiengesellschaft

Heinz-J Urgen Wroblowsky

Klaus K Onig

Reinhard Lantzsch

Joachim Kluth

Klaus-Helmut M Uller

Alkoxytriazolinones of the general formula (I), ##STR1## in which R.sup.1 and R.sup.2 independently of one another represent in each case optionally substituted alkyl, alkenyl, alkinyl, cycloalkyl, cycloalkylalkyl, aryl or arylalkyl,

Process for the preparation of alkoxytriazolinones

The invention relates to a process for the preparation of pyrazoles of the formula (I) ##STR1## in which R represents hydrogen, alkyl, unsubstituted or substituted cycloalkyl, unsubstituted or substituted aryl or unsubstitited or substituted arylalkyl, by reaction of propenylideneammonium chloride derivatives of the formula (II) ##STR2## with hydrazines of the formula (III)

Process for the preparation of pyrazoles

Alkoxytriazolinones of the formula (I), ##STR1## in which R.sup.1 and R.sup.2 independently of one another represent in each case optionally substituted alkyl, alkenyl, alkinyl, cycloalkyl, cycloalkylalkyl, aryl or arylalkyl,

Alkoxytriazolinones of the general formula (I), ##STR1## in which R.sup.1 and R.sup.2 independently of one another represent in each case optionally substituted alkyl, alkenyl, alkinyl, cycloalkyl, cycloalkylalkyl, aryl or arylalkyl, (which can be used as intermediates for the preparation of herbicidal active compounds) are obtained in very good yields and in high purity by reacting iminocarbonic diesters (II) with carbazinic esters (III) ##STR2## in which R.sup.3 and R.sup.4 in each case represent, for example, alkyl or aryl, at -20.degree. C. to +120.degree. C. (1st step) and subjecting the semicarbazide derivatives (IV) formed in this process with elimination of R.sup.3 -OH ##STR3## to a cyclizing condensation reaction in the presence of a base at +20.degree. C. to 100.degree. C. with elimination of R.sup.4 -OH, if appropriate after intermediate isolation (2nd step).

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Langenfeld, Germany

Heinz-J Urgen Wroblowsky