[EN] AN IMPROVED PROCESS FOR MINIMISING THE FORMATION OF DEHALOGENATED BYPRODUCTS<br/>[FR] PROCÉDÉ AMÉLIORÉ PERMETTANT DE RÉDUIRE AU MINIMUM LA FORMATION DE SOUS-PRODUITS DÉSHALOGÉNÉS
申请人:PIRAMAL ENTPR LTD
公开号:WO2015071831A1
公开(公告)日:2015-05-21
The present invention provides an improved process for preparation of organic compounds represented by Formula-Z; wherein effectively minimising the formation of dehalogenated by-products is achieved. In the process, the reduction is carried out using suitable reducing agent; more preferably Lithium Aluminium Hydride (LAH) in a solvent system, wherein at least one of the solvent is selected from halogenated solvents, which acts as co-solvent. The process of the present invention is useful for minimising of the formation of dehalogenated by-products during synthesis of various active pharmaceutical ingredients such as Paroxetine Hydrochloride, Cinacalcet, Eletriptan and Asenapine.
本发明提供了一种改进的有机化合物制备方法,该化合物由Formula-Z表示;在该过程中,有效地最小化了去卤代副产物的形成。在该过程中,使用适当的还原剂进行还原;更好地使用锂铝氢化物(LAH)在溶剂系统中进行还原,其中至少一种溶剂是选自卤代溶剂的协溶剂。本发明的方法对于在合成各种活性药物成分(如盐酸帕罗西汀、西那卡塞特、厄利替普坦和阿塞那平)期间最小化去卤代副产物的形成非常有用。