Patent ID: 7872132

Claim:
A process for the preparation of aripiprazole of formula (1), comprising: (i) reacting a compound of formula (11) with 1,4-dihalobutane of formula (12) in the presence of a suitable base and solvent at a temperature in the range of 80° C. to 120° C. to form a compound of formula (3) wherein X in formula (3) represents Cl or Br; (ii) reacting the compound of formula (3) obtained in step (i) with compound of formula (9) in the presence of a suitable base, phase transfer catalyst and solvent at a temperature in the range of 90° C. to 110° C. to form a compound of formula (2) (iii) reacting the resulting compound of formula (2) obtained in step (ii) with an azide reagent in the presence of acid at a temperature in the range of 50° C. to 70° C. to obtain the compound of formula (1); and optionally (iv) recrystallizing the compound of formula (1).