| abstract |
The present invention provides large compounds of formula (I) in high yield and selectivity, wherein R 1 ＨH, C 1-6 alkyl or C n H 2n + 1 groups, where n = 1, 2 or 3, R 2 = C 1-4 alkyl, X = E- or Z-OH and Y = O C 1-6 alkyl, S C 1-6 alkyl or OCH 2 C n H 2n + 1 ,, wherein n = 1, 2 or 3, a process for producing 4- (17α-methyl-substituted 3-oxoestradi-4,9-dien-11β-yl) benzaldehyde- (1E or 1Z) -oxime of the general formula (I). Embedded image |