The present invention relates to a novel process for the synthesis of herbicidal pyrazolidinedione compounds. In particular, a process for the preparation of a compound of formula (I), wherein R1, R2 and R3 are as defined herein. The present invention further relates to novel intermediate compounds utilized in said process, and methods for preparing said intermediate compounds.
                            本发明涉及一种合成除草
嘧啶二酮化合物的新工艺。具体来说,涉及一种用于制备式(I)化合物的工艺,其中R1、R2和R3如本文所定义。本发明还涉及在该工艺中使用的新型中间体化合物,以及制备该中间体化合物的方法。