申请人:Rotam Agrochem International Company Limited
公开号:US10421714B2
公开(公告)日:2019-09-24
A process for the preparation of mesotrione enolate is provided. The process comprises providing a solution of mesotrione in an organic solvent and contacting the solution with a moderate base in the presence of water at a pH of from 6 to 8, to form an aqueous mesotrione enolate solution. A process for preparing mesotrione from the products of an enol ester rearrangement of 3-oxocyclohex-1-enyl-4-(methylsulfonyl)-2-nitrobenzoate is also provided. The process comprises contacting the products of the rearrangement reaction with an organic solvent to dissolve mesotrione; and contacting the resulting solution with an aqueous solution of an acid.
本发明提供了一种制备间三酮烯醇的工艺。该工艺包括提供介三酮在有机溶剂中的溶液,并在 pH 值为 6 至 8 的条件下,在有水存在的情况下将该溶液与适度的碱接触,以形成介三酮烯醇水溶液。还提供了一种从 3-氧代环己-1-烯基-4-(甲磺酰基)-2-硝基苯甲酸酯的烯醇酯重排产物制备间三酮的工艺。该工艺包括将重排反应的产物与有机溶剂接触以溶解间三酮;以及将所得溶液与酸的水溶液接触。