Organic compounds -- part of the class 532-570 series – Organic compounds – Cyclopentanohydrophenanthrene ring system containing
Reexamination Certificate
2011-03-22
2011-03-22
Dentz, Bernard (Department: 1625)
Organic compounds -- part of the class 532-570 series
Organic compounds
Cyclopentanohydrophenanthrene ring system containing
C552S626000, C552S627000
Reexamination Certificate
active
07910756
ABSTRACT:
The invention provides a process for the preparation of 2-substituted-derivatives of estrone and estradiol. The invention also provides several novel compounds, which can be intermediates in the process, and processes to prepare these novel compounds. The invention also provides 2-alkoxy-estrone, 2-alkoxy-estradiol or mixtures thereof essentially free from other estrogenic intermediates.
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Moers Nicolaas Elisabeth Cornelis
Stoelwinder Johannes
Dentz Bernard
N.V. Organon
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