Process for preparing N-aryl-piperazine derivatives

摘要

Processes for preparing N-aryl-piperazine derivatives of formula I particularly (R)-4-cyano-N-[2-[4-(2,3-dihydro-1,4-benzodioxan-5-yl)-1-piperazinyl-propyl]-N-(2-pyridinyl)-benzamide, are disclosed. Compositions comprising N-aryl-piperazine derivatives and low levels of common impurities are also disclosed. In addition, products produced by the process are disclosed.