The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 14, 1997
Filed:
Sep. 15, 1995
Heinz-Jurgen Wroblowsky, Langenfeld, DE;
Klaus Konig, Odenthal, DE;
Bayer Aktiengesellschaft, Leverkusen, DE;
Abstract
Alkoxytriazolinones of the general formula (I), ##STR1## in which R.sup.1 represents hydrogen, or represents in each case optionally substituted alkyl, alkenyl, alkinyl, cycloalkyl, cycloalkylalkyl, aryl or arylalkyl, and R.sup.2 represents 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 imino(thio)carbonic esters (II) with alkoxyethyl carbazinates (III) ##STR2## in which Q represents O or S, R.sup.3 represents (for example) alkyl, aryl or aralkyl and R.sup.4 represents (for example) alkyl, at -20.degree. C. to +150.degree. C. (1st step) and subjecting the new semicarbazide derivatives (IV) ##STR3## which are formed with elimination of R.sup.3 --QH, if appropriate after intermediate isolation, to a cyclizing condensation reaction at 0.degree. C. to 200.degree. C., without the addition of a base, advantageously under reduced pressure, with the elimination of alkoxyethanols (2nd step).