| abstract |
The invention describes a method for preparing 4- (17α-substituted-3-oxoestra-4,9-diene-11β-yl) benzaldehyde- (1E or 1Z) oximes of the general formula I in which R is a hydrogen atom, a C-C alkyl residue or a CF2 residue, R is a C -C alkyl radical, X is an OH group in the E- or Z-position, and Y is an OC-Calkyl group, an SC-Calkyl group or an OCHCF group, where n is 1, 2 or 3. compounds of formula (I) are obtained in high yield and high selectivity. |