Title:
4-アミノ-1,2,4-トリアゾリン-5-オンの改良された製造方法
Document Type and Number:
Japanese Patent JP4700777
Kind Code:
B2
Abstract:
The present invention is related to an improved process for the commercial preparation of substituted aminotriazolinones, which are known intermediates in the preparation of herbicidal active compounds. In particular, this invention relates to the preparation of 4-amino-1,2,4-triazolin-5-ones, and more particularly to the preparation of 3-isopropyl-4-aminotriazolinone. The process of the invention includes reacting an oxadiazolinone with hydrazine hydrate in the absence of a solvent. In a preferred embodiment, the hydrazine hydrate is mixed with a basic compound, preferably aqueous sodium hydroxide.
Inventors:
Biz Desai
Klaus Jeriich
Hans-Joachim Dahl
Reinhard Ranchille
Klaus Jeriich
Hans-Joachim Dahl
Reinhard Ranchille
Application Number:
JP34737699A
Publication Date:
June 15, 2011
Filing Date:
December 07, 1999
Export Citation:
Assignee:
BAYER CORPORATION
Bayer Aktiengesellschaft
Bayer Aktiengesellschaft
International Classes:
C07D249/12
Domestic Patent References:
| JP9059262A | ||||
| JP1197474A |
Attorney, Agent or Firm:
Patent business corporation Odashima patent office
Heigo Odashima
Heigo Odashima