专利号:US-7381821-B2 优先权日:2003-01-23 标 题 :Piperazine derivatives and their use as synthesis intermediates 发明人:ATES CELAL; CAVOY EMILE; BOUVY DIDIER 权利人:UCB SA 摘要:The present invention relates to new enantiomerically pure piperazine derivatives of formula (I) wherein Y represents hydroxy or a leaving group and n is 1, 2, 3, 4 or 5, and to their use as synthesis intermediates, especially for the preparation of pharmaceutically active compounds