Preparation of benzosuberonylpiperidine compounds

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

Reexamination Certificate

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C546S206000, C546S207000

Reexamination Certificate

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10494838

ABSTRACT:
Diastereoselective and enantioselective synthetic routes for the preparation of compounds of formula (I):or derivatives thereof,wherein:R is C1-6alkyl, C3-7cycloalkyl, C1-6alkoxy, hydroxy, halo, C1-6alkenyl, C1-6alkynyl, amino, C1-6alkylamino, di(C1-6alkyl)amino, hydroxyC1-6alkyl, C1-6alkoxyC1-6alkyl, arylC1-6alkoxy, heteroarylC1-6alkoxy, aminoC1-6alkyl, (C1-6alkyl)aminoC1-6alkyl, di(C1-6alkyl)aminoC1-6alkyl, arylC1-6alkylamino, heteroarylC1-6alkyamino;R1is hydrogen or R;R2is hydroxy, C1-6alkoxy, amino, C1-6alkylamino, di(C1-6alkyl)amino;R3and R4are each independently selected from the list consisting of perhaloC1-6alkyl, hydrogen, halo, C1-6alkyl, C1-6alkoxy, hydroxy, amino, C1-6alkylamino, di(C1-6alkyl)amino, hydroxyC1-6alkyl, C1-6alkoxyC1-6alkyl, aminoC1-6alkyl,(C1-6alkyl)aminoC1-6alkyl, di(C1-6alkyl)aminoC1-6alkyl, aryl, and COX wherein X may be hydroxy, C1-6alkoxy, C1-6alkyl, amino, C1-6alkylamino, or di(C1-6alkyl)amino; and wherein any alkyl group or the alkyl moiety of any group containing such a moiety may be substituted one or more times by halo.

REFERENCES:
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patent: WO 00/27815 (2000-05-01), None
patent: WO0183454 (2001-11-01), None
Ponzo et al, Tetra. Let. vol. 36 No. 50 pp. 9105-9108 (1995).
Hett et al, CA 128:157888, (1998).
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Lane, Clinton F., Sodium Cyanoborohydride, a highly selective reducing agent for organic functional groups:, Database Accession No. 82:124186, XP002232848, Abstract & Synthesis (1975), (3), pp. 135-146.

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