Synthesis method of asymmetric diaryl substituted butanedione compounds

The invention relates to a synthesis method of asymmetric diaryl substituted butanedione compounds disclosed as Formula (III). The method comprises the following steps: in a solvent, carrying out reaction on compounds disclosed as Formula (I) and compounds disclosed as Formula (II) in the presence of a catalyst, a ligand and an acidic compound; and after the reaction finishes, carrying out after-treatment, thereby obtaining the compounds disclosed as Formula (III), wherein R is halogen, C1-C6 alkyl or C1-C6 alkoxy, and X is an alkali metal element. Under the combined selection and synergic actions of the specific catalyst, ligand, acidic compound and solvent, the method can obtain the asymmetric diaryl substituted butanedione compounds at high yield, and has favorable application prospects and industrial production potential in the field of organic chemical synthesis. Besides, the invention also relates to a synthesis method of the raw material compounds disclosed as Formula (I) and researches the optimal synthesis conditions and technical characteristics.