PROBLEM TO BE SOLVED: To provide a method for producing diclofenac sodium, in which the method is featured by facility of the raw material, low cost, simple operation, mild reaction condition and easy industrialization.SOLUTION: A compound of the invention is produced according to the following reaction scheme, in which R represents an alkyl group of C1 to C8, cycloalkyl group, a mono- or poly-substituted aryl group, or an aralkyl group.SELECTED DRAWING: Figure 1COPYRIGHT: (C)2020,JPO&INPIT【課題】原料が入手されやすく、コストが低く、操作が簡単で、反応条件が温和で、工業化生産が容易なジクロフェナクナトリウムの製造方法の提供。【解決手段】下記の反応経路で製造する。［ＲはＣ１－Ｃ８アルキル基、シクロアルキル基、一置換若しくは多置換アリール基又はアラルキル基である。］【選択図】図１
