Process 054

Organic compounds -- part of the class 532-570 series – Organic compounds – Heterocyclic carbon compounds containing a hetero ring...

Reexamination Certificate

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Reexamination Certificate

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07816545

ABSTRACT:
The present invention is directed to a process for the preparation of a diastereomerically pure dibenzoyl-L-tartrate salt of a compound of formula (III)and to products of said process.

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patent: 9905142 (1999-02-01), None
patent: 0192263 (2001-12-01), None
Sakai et al., Tetrahedron: Asymmetry 14 (2003) 1631-1636.
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Shireman et al., “Rapid syntheses of either enantiomer of important carbocyclic nucleoside precursors,” Tetrahedron Lett (2000) 41:9537-9540.
Rajappan et al., “A protected form of (1S,2R,3S,4R)-4-aminocyclopentane-1,2,3-triol, a useful precursor to 5′-norcarbocyclic nucleosides,” Synth Commun (2001) 31:2849.
Lee et al., “Large scale aspects of salt formation: processing of intermediates and final products,” Verlag Helvetica Chimica Acta (2002) 211-217.
Springthorpe et al., “From ATP to AZD6140: the discovery of an orally active reversible P2Y12 receptor antagonist for the prevention of thrombosis,” Bioorganic and Medicinal Chemistry Letters (2007) 17(21):6013-6018.
Rajappan et al., “A Protected form of (1s,2r,3s,4r)-4-Aminocyclopentane-1,2,3-Triol, a useful Precursor to 5′-nor Carbocyclic Nucleosides,” Synthetic Communications (2001) 31(18):2849-2854.

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