Aripiprazole (CAS NO.: 129722-12-9), with its systematic name of 2(1H)-Quinolinone, 7-(4-(4-(2,3-dichlorophenyl)-1-piperazinyl)butoxy)-3,4-dihydro-, could be produced through many synthetic methods.

Following are some of the synthesis routes:
Route one: 7-(4-Bromobutoxy)-1,2,3,4-tetrahydroquinolin-2-one (I) is condensed with 1-(2,3-dichlorophenyl)piperazine (II) in the presence of NaI and triethylamine in refluxing acetonitrile to produce Aripiprazole.

Route two: 7-Hydroxy-1,2,3,4-tetrahydroquinolin-2-one (I) is condensed with 1,4-dibromobutane (II) in the presence of K₂CO₃ in hot DMF to produce 7-(4-bromobutoxy)-1,2,3,4-tetrahydroquinolin-2-one (III), which is then condensed with 1-(2,3-dichlorophenyl)piperazine (IV) by means of NaI and triethylamine in refluxing acetonitrile.