Process for the racemization of...

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

Reexamination Certificate

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C546S240000

Reexamination Certificate

active

06949650

ABSTRACT:
A process for the racemization of enantiomerically enriched 1-benzyl-4-(4-fluorophenyl)-3-hydroxymethyl-1,2,3,6-tetrahydropyridine which is a useful intermediate in the preparation of paroxetine. Formula (A) means that the compound (I) has an enantiomeric excess of one enantiomer over the other enantiomer. R1and R2are defined as in claim1.

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patent: 97/24323 (1997-07-01), None
patent: 98/01424 (1998-01-01), None
patent: 98/52920 (1998-11-01), None
Exhibit A and B, search results.
Mesnard et al. “Action of p-toluensulfonyl chloride . . . ” CA 60:26971 (1964).
Sjoegreen et al. “A process of making . . . ” CA 124:260382 (1996).
Choudary et al. “Montmorillonite clay catalyzed . . . ” CA 133:362452 (2000).
ActaChem.Scand,vol. 50,No. 2(1996) 164-169,Engelstoft et al.
J.LabelledCompunds . . . , vol. 33,No. 8,1993, 783-794 Willocks et al.

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