Process for preparing Nebivolol

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

Reexamination Certificate

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C549S398000, C549S401000

Reexamination Certificate

active

08003810

ABSTRACT:
The present invention relates to a process for preparing Nebivolol and, more particularly, to an improved process for synthesizing enantiomerically enriched 6-fluoro chroman alcohol or epoxide derivatives of formula, wherein R and X is defined in the description; as useful intermediates in the preparation of Nebivolol.

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patent: 6639087 (2003-10-01), Larrow et al.
patent: 2003/0073855 (2003-04-01), Liu et al.
patent: 1649861 (2005-08-01), None
patent: 2004/041805 (2004-05-01), None
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Yu, et al., A Convenient Synthesis of 1-[6-Fluoro-(2S)-3H,4H-1-dihydro-2H-2-chromeny1]-. (1R)-1,2-ethanediol and 1-[6-Fluoro-(2R)-3H,4H-dihydro- 2H-2-chromenyl]-. (1R)-1,2-ethanediol, Synlett, 2005, 9:1465-1467.
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Submission of Third Parties Observations pursuant to Article 115 EPC in connection with European Application No. 07846784.2, dated Mar. 30, 2010.
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