Method for the production of 4-(17$g(a)-methyl substituted...

Details Method for the production of 4-(17$g(a)-methyl substituted... Method for the production of 4-(17$g(a)-methyl substituted...

2007-09-11

2007-09-11

Badio, Barbara P. (Department: 1617)

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

Organic compounds

Cyclopentanohydrophenanthrene ring system containing

Reexamination Certificate

active

10416234

ABSTRACT:
The invention relates to a process for the production of 4-(17α-methyl-substituted 3-oxoestra-4,9-dien-11β-yl)benzaldehyde-(1E or 1Z)-oximes of general formula (I), in which R1is a hydrogen atom, a C1-6-alkyl radical or a CnF2n+1radical, whereby n is 1, 2 or 3, R2is a C1-4-alkyl radical, X is an OH group in E- or Z-position, and Y is an OC1-6-alkyl group, an SC1-6-alkyl group or an OCH2CnF2+1group, whereby n is 1, 2 or 3, which provides the target compounds of formula (I) with a high yield and good selectivity

REFERENCES:
patent: 5693628 (1997-12-01), Schubert et al.
patent: 289539 (1991-05-01), None
patent: 0648778 (1995-04-01), None

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