Organic compounds -- part of the class 532-570 series – Organic compounds – Nitrogen attached directly or indirectly to the purine ring...
Reexamination Certificate
2008-12-19
2011-11-15
Shameem, Golam M M (Department: 1622)
Organic compounds -- part of the class 532-570 series
Organic compounds
Nitrogen attached directly or indirectly to the purine ring...
C544S336000
Reexamination Certificate
active
08058438
ABSTRACT:
Eszopiclone is prepared by reacting zopiclone with an enatiomerically pure di-p-toluoyl tartaric acid, recovering a solid salt, and reacting a solid salt with a base. Zopiclone is prepared by reacting 6-(5-chloropyrid-2-yl)-5-hydroxy-7-oxo-5,6-dihydropyrrolo[3,4-b]-pyrazine with 1-chlorocarbonyl-4-methylpiperazine hydrochloride.
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Chinta Raveendra Reddy
Jambula Mukunda Reddy
Kandala Sreenadhacharyulu
Mandava Venkata Naga Brahmeswara Rao
Dr. Reddy's Laboratories Inc.
Dr. Reddy's Laboratories Limited
Franks Robert A.
Gupta Balaram
McKenzie Thomas C.
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