Title:
PRODUCTION OF ALKOXYTRIAZOLINONE
Document Type and Number:
Japanese Patent JP3910653
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To obtain on an industrial scale in high yield an alkoxytriazolinone useful as an intermediate for producing herbicidally active compounds.
SOLUTION: This alkoxytriazolinone of formula IV is obtained by the following procedure: an iminothiocarbonic diester of formula I (R1 is an alkyl, alkenyl or the like; R2 is an alkyl, alkenyl or the like; R3 is an aryl, alkyl or the like) is reacted with a dicarbazinic ester of formula II (R4 is an alkyl or the like), as necessary in the presence of a reaction auxiliary (e.g. protonic acid) and/or a diluent (e.g. methanol) at -20 to +50°C (the 1st reaction step) to form a semicarbazide derivative of formula III and/ or the corresponding tautomer as intermediate while expelling mercaptan formed, and the intermediate of formula III is subsequently subjected to a cyclizing condensation reaction at 20-100°C in the presence of a base (e.g. sodium methanolate) and a diluent (the 2nd reaction step).
Inventors:
Heinz-Jurgen Browlowski
Klaus Konig
Joachim Kurt
Klaus-Helmut Michelle
Klaus Konig
Joachim Kurt
Klaus-Helmut Michelle
Application Number:
JP26612795A
Publication Date:
April 25, 2007
Filing Date:
September 21, 1995
Export Citation:
Assignee:
Bayer Aktiengesellschaft
International Classes:
C07D249/12; (IPC1-7): C07D249/12
Domestic Patent References:
| JP5194433A | ||||
| JP8113566A | ||||
| JP4288062A |
Foreign References:
| WO1994008979A1 |
Other References:
Chemische Berichte,1987年,Vol.120, No.3,p.339-344
Attorney, Agent or Firm:
Heikichi Odashima