Patent ID: 7053229
Filing Date: 2006-05-30
Classification: C07J

Abstract:
1. A process for preparing a 4-(17α-alkoxymethyl-17β-substituted-3-oxoestra-4,9-dien-11β-yl)benzaldehyde-(1E)-oxime compound of formula (I) in which R means an amino group, an O—C R R R comprising reacting a benzadoxime compound of formula (II) in which R with chloroformic acid trichloromethyl ester or phosgene in an inert solvent in the presence of a tert-amine compound at a temperature of −35 to +30° C. to form the chloroformic acid compound of formula (III), in which R and reacting the chloroformic acid compound of formula (III) with a C