Method for the production of 4-(17$g(a)-methyl substituted 3-oxoestra-4 9-dien-11$g(b)-yl)benzaldehyd-(1e or 1z)-oximes
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United States of America Patent
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Sep 11, 2007
Grant Date -
Apr 1, 2004
app pub date -
Nov 9, 2001
filing date -
Nov 10, 2000
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Abstract
The invention relates to a process for the production of 4-(17.alpha.-methyl-substituted 3-oxoestra-4,9-dien-11.beta.-yl)benzaldehyde-(1E or 1Z)-oximes of general formula (I), in which R.sub.1 is a hydrogen atom, a C.sub.1-6-alkyl radical or a C.sub.nF.sub.2n+1 radical, whereby n is 1, 2 or 3, R.sub.2 is a C.sub.1-4-alkyl radical, X is an OH group in E- or Z-position, and Y is an OC.sub.1-6-alkyl group, an SC.sub.1-6-alkyl group or an OCH.sub.2C.sub.nF.sub.2+1 group, whereby n is 1, 2 or 3, which provides the target compounds of formula (I) with a high yield and good selectivity ##STR00001##
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