The present invention relates to a process for the preparation of 2-[4-(α-phenyl-p-chlorobenzyl)-piperazin-1-yl]-ethoxy}-acetic acid-N,N-dimethylamide of the Formula (I) and enantiomers thereof. The compound of the Formula (I) or enantiomers thereof are important pharmaceutical intermediates suitable for direct transformation into non-sedating antihistamine type pharmaceutical active ingredients cetirizine and levocetirizine.
本发明涉及一种制备公式(I)中的2-[4-(α-苯基-p-
氯苯基)-
哌嗪-1-基]-乙氧基}-
乙酸-N,N-二甲酰胺及其对映体的过程。公式(I)化合物或其对映体是重要的制药中间体,适用于直接转化为非镇静型
抗组胺药物活性成分
西替利嗪和
左西替利嗪。