申请人:Rao Dharmaraj Ramachandra
公开号:US20110184174A1
公开(公告)日:2011-07-28
The present invention provides a compound of formula (IV)
wherein R is Cl, Br, NO
2
, OH or OR′, and R′ is alkyl, and its use in the synthesis of levocetirizine, including its use in the synthesis of (−)-1-[(4-chlorophenyl)-phenylmethyl]piperazine, an intermediate useful in the synthesis of levocetirizine. The present invention also provides compounds (II) and (III) which are useful in the synthesis of compound (IV).
本发明提供了一种化合物,其化学式为(IV),其中R为Cl、Br、NO2、OH或OR′,R′为烷基,并且其在左旋西替利嗪的合成中的应用,包括其在合成(−)-1-[(4-氯苯基)-苯甲基]哌嗪中的应用,这是左旋西替利嗪合成中有用的中间体。本发明还提供了化合物(II)和(III),它们在化合物(IV)的合成中有用。