Preparation of Zopiclone and its enantiomerically enriched isomer

Present invention relates to an improved process for the preparation of Zopiclone and its enantiomerically enriched isomer (Eszopiclone). 6-(5-Chloropyridin-2-yl)-5-hydroxy-7-oxo-5,6-dihydropyrrolo[3,4-b]pyrazine is reacted with 1-chloro-carbonyl-4-methylpiperazine in the presence of alkali earth me...

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Bibliographische Detailangaben

Hauptverfasser:	Tyagi, Om Dutt, Srivastava, Tushar Kumar, Prasad, Vellanki Siva Ram, Rane, Dnyandev Ragho, Rao, Bandi Naga Durga, Reddy, Daggula Srinivas
Format:	Patent
Sprache:	eng
Online-Zugang:	Volltext bestellen
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