Process for the preparation of norelgestromin

Details Process for the preparation of norelgestromin Process for the preparation of norelgestromin

2008-07-01

2008-07-01

Badio, Barbara P (Department: 1612)

Organic compounds -- part of the class 532-570 series

Organic compounds

Cyclopentanohydrophenanthrene ring system containing

Reexamination Certificate

active

11641954

ABSTRACT:
Process for the preparation of Norelgestromin or 17α-hydroxy-13β-ethyl-18,19-dinorpregn-4-ene-20-yn-3-one oxime, also in crystalline form, in particular with an E/Z isomer ratio of between 1.3 and 1.5.

REFERENCES:
patent: 2004/0266741 (2004-12-01), Tombari et al.
patent: 2005/000868 (2005-01-01), None
NDA 21-180, Ortho Evra, 2001.

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