Process for the preparation of an optically active...

Details Process for the preparation of an optically active... Process for the preparation of an optically active...

2011-01-04

2011-01-04

Wilson, James O (Department: 1624)

Drug, bio-affecting and body treating compositions

Designated organic active ingredient containing

Heterocyclic carbon compounds containing a hetero ring...

C544S350000, C544S360000, C546S268100

Reexamination Certificate

active

07863273

ABSTRACT:
A substantially pure dextrorotatory isomer of zopiclone or a pharmaceutically acceptable salt thereof and crystalline forms thereof are provided. Also provided is a process for its preparation and pharmaceutical compositions containing same.

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patent: WO 2005/047274 (2005-05-01), None
patent: WO 2005/097132 (2005-10-01), None
Yaping et al., “Synthesis of enantiomerically pure desmethylzopiclone and determination of its absolute configuration”,Tetrahedron: Asymmetry, vol. 11, 2000, pp. 4623-4627.
Wilen et al., “Tetrahedron report No. 38: Strategies in optical resolutions”,Tetrahedron, Elsevier Science Publishers, vol. 33, No. 21, 1977, pp. 2725-2736.

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