PROCESS FOR THE PREPARATION OF MESYLATES OF PIPERAZINE DERIVATIVES

摘要

The invention relates to the mesylates of a group of piperazine derivatives and to a process for the preparation of these mesylates in an economic way i n the high yield and of high purity. According to the process of the invention the synthesis of the piperazine ring and the mesylate formation are combined in a single reaction step. The invention relates to the mesylate of compound s of the formula (I) wherein X is a bicyclic heterocyclic phenyl group and Y i s methyl, ethyl (optionally substituted with fluorine), cycloalkyl (3-7C) methyl, benzyl or m-phenyl benzyl.