| 摘要 |
<p>The invention relates to a process for the production of 4-(17alpha-methyl-substituted 3-oxoestra-4,9-dien-11beta-yl)benzaldehyde-(1E or 1Z)-oximes of general formula (I), in which R<SUB>1 </SUB>is a hydrogen atom, a C<SUB>1-6</SUB>-alkyl radical or a C<SUB>n</SUB>F<SUB>2n+1 </SUB>radical, whereby n is 1, 2 or 3, R<SUB>2 </SUB>is a C<SUB>1-4</SUB>-alkyl radical, X is an OH group in E- or Z-position, and Y is an OC<SUB>1-6</SUB>-alkyl group, an SC<SUB>1-6</SUB>-alkyl group or an OCH<SUB>2</SUB>C<SUB>n</SUB>F<SUB>2+1 </SUB>group, whereby n is 1, 2 or 3, which provides the target compounds of formula (I) with a high yield and good selectivity</p> |
