Preparation method for 1-aryl-2-indolinone derivatives

The invention discloses a method for synthesis of 1-aryl-2-indolinone derivatives. The method comprises the following steps: dissolving N-aryl-substituted phenylacetamide (III) in an organic solvent, adding a chlorination reagent and carrying out a reaction so as to obtain N-chloro-N-aryl-substituted phenylacetamid (II); and subjecting N-chloro-N-aryl-substituted phenylacetamid to a reaction with a certain amount of Lewis acid and a proper amount of an organic solvent at a certain temperature so as to obtain 1-aryl-2-indolinone (I). The method provided by the invention has the advantages of simple operation, easily available reagents, a low price, mild conditions and capability of synthesizing a plurality of 1-aryl-2-indolinone (I) compounds.