The invention relates to the technical field of
benzimidazole isoquinoline ketonization reaction, in particular to a synthesis method of
benzimidazole isoquinoline ketonization reaction. The method comprises the following steps: sequentially adding
potassium persulfate, a reactant I, a reactant II, a
dimethyl sulfoxide and water
mixed solution and a NO.5 magneton into a reactor, connecting a condenser
pipe, introducing
condensed water from bottom to top, putting the reactor into an
oil bath pan at 100-120 DEG C, heating, stirring and reacting for 0.5-2 hours, terminating the reaction, filtering, washing, and
drying to obtain a target product. Purifying the product to obtain a
benzimidazole isoquinolinone product; the reactant I is selected from one of N-phenylpentyl-4-enamide, N-(p-tolyl) pentyl-4-enamide, N-(4-fluorophenyl) pentyl-4-enamide and N-(4-chlorphenyl) pentyl-4-enamide, and the reactant II is selected from one of N-phenylpentyl-4-enamide, N-(p-tolyl) pentyl-4-enamide and N-(4-chlorophenyl) pentyl-4-enamide; the reactant II is selected from the group consisting of 2-methyl-1-(2-phenyl-1H-benzo [d]
imidazole-1-yl) prop-2-en-1-one, and the reactant II is selected from the group consisting of 2-methyl-1-(2-phenyl-1H-benzo [d]
imidazole-1-yl) The method is mild in reaction condition, high in selectivity, relatively high in yield and environment-friendly; the benzimidazole isoquinolinone compound can be used in the field of synthesis of drugs, pesticides and paint dyes.