Preparation method of 7-benzoyl-1,3-indoline-2-ketone

The invention discloses a preparation method of 7-benzoyl-1,3-indoline-2-ketone.The preparation method comprises the specific steps that 2-amino-3-benzoyl phenylacetamide is added in a reactor, an organic solvent is added until the solution is clear, a catalyst is added, reacting under temperature controlling is performed, and after reacting is completed, reduced-pressure concentration is performed to obtain 7-benzoyl-1,3-indoline-2-ketone.According to the method for preparing 7-benzoyl-1,3-indoline-2-ketone, the technology is stable, operation is easy, the yield is high, the purity is high, no harsh reaction condition is needed, the needed temperature and pressure are both within a conventional range, the adopted reagents are nontoxic, pollution is low, and the economical performance is achieved.