Process for making spirolactone compounds

Organic compounds -- part of the class 532-570 series – Organic compounds – Four or more ring nitrogens in the bicyclo ring system

Reexamination Certificate

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Details

C544S332000, C544S336000, C544S182000, C546S015000, C546S167000, C548S311400, C548S364400, C549S265000

Reexamination Certificate

active

07368569

ABSTRACT:
This invention relates to a process for making spirolactone compounds analogous to formula I

REFERENCES:
patent: 6326375 (2001-12-01), Fukami et al.
patent: 6335345 (2002-01-01), Fukami et al.
patent: 6388077 (2002-05-01), Fukami et al.
patent: 6462053 (2002-10-01), Fukami et al.
patent: 6605720 (2003-08-01), Maeda et al.
patent: 6649624 (2003-11-01), Fukami et al.
patent: 6723847 (2004-04-01), Fukami et al.
patent: 6803372 (2004-10-01), Fukami et al.

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