Stereoselective synthesis of a 4,4-disubstituted...

Organic compounds -- part of the class 532-570 series – Organic compounds – Carboxylic acids and salts thereof

Reexamination Certificate

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C568S031000

Reexamination Certificate

active

07411088

ABSTRACT:
There is provided stereoselective route to a compound of formula I:wherein R represents H or an alkali metal, Ar1represents 4-chlorophenyl and Ar2represents 2,5-difluorophenyl.

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patent: 2003/0114496 (2003-06-01), Churcher et al.
patent: 2004/0116404 (2004-06-01), Pineiro et al.
patent: WO 02/081435 (2002-10-01), None
patent: WO 03/018543 (2003-03-01), None
patent: WO 2004/013090 (2004-02-01), None

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