申请人:Sawant Shrikant Dattatraya
公开号:US20080146800A1
公开(公告)日:2008-06-19
The invention relates to a process for making of 6-(5-chloro-2-pyridinyl)-6,7-dihydro-7-oxo-5H-pyrrolo-[3,4-b] pyrazin-5-yl-4-methyl piperazine-1-carboxylate, also known as zopiclone. The invention further describes an effective method for resolving of zopiclone into its enantiomers (eszopiclone and (R)-zopiclone) and also provides a method of recycling of (R)-zopiclone.
该发明涉及一种制备6-(5-氯-2-吡啶基)-6,7-二氢-7-氧基-5H-吡咯罗-[3,4-b]吡嗪-5-基-4-甲基哌嗪-1-羧酸酯,也称为唑吡克隆的方法。该发明进一步描述了一种有效的方法,用于将唑吡克隆分离成其对映体(eszopiclone和(R)-唑吡克隆),并提供了(R)-唑吡克隆的回收方法。