METHOD FOR PREPARING 17 ALPHA -ACETOXY-11 BETA -(4METHOD FOR PREPARING 17 ALPHA -ACETOXY-11 BETA -(4-N,N-DIMETHYLAMINOPHENYL)-19-NORPREGNA-4,9-DIENE-3-N,N-DIMETHYLAMINOPHENYL)-19-NORPREGNA-4,9-DIENE-3,20-DIONE, INTERMEDIATES USEFUL IN THE METHOD, AND,20-DIONE, INTERMEDIATES USEFUL IN THE METHOD, AND METHODS FOR THE PREPARATION OF SUCH INTERMEDIATES METHODS FOR THE PREPARATION OF SUCH INTERMEDIATES. .

摘要

Methods for the preparation of the 19-norprogesterone of formula (I) and its intermediates, in crystalline and amorphous forms.