申请人:Bayer Corporation
公开号:US06197971B1
公开(公告)日:2001-03-06
The present invention relates to a process for manufacturing substituted triazolinones, which are intermediates in the preparation of herbicidally active compounds. In particular, this invention relates to the alkylation of a non-alkylated triazolinone intermediate product, wherein the improvement comprises conducting the alkylation reaction under pH controlled conditions. In a preferred embodiment, the invention relates to the preparation of a 5-alkoxy(or aryloxy)-2,4-dihydro-3H-1,2,4-triazol-3-one, and the alkylation of this non-alkylated triazolinone intermediate product, to produce a 5-alkoxy(or aryloxy)-4-alkyl-2,4-dihydro-3H-1,2,4-triazol-3-one.
本发明涉及一种用于制造取代三唑酮的工艺,这些化合物是除草活性化合物的中间体。特别地,本发明涉及一种非烷基化三唑酮中间体产物的烷基化过程,其中改进在于在pH控制条件下进行烷基化反应。在一种优选实施方式中,本发明涉及制备5-烷氧基(或芳氧基)-2,4-二氢-3H-1,2,4-三唑酮,以及对这种非烷基化三唑酮中间体产物进行烷基化,以产生5-烷氧基(或芳氧基)-4-烷基-2,4-二氢-3H-1,2,4-三唑酮。