申请人:Bayer Schering Pharma Aktiengesellschaft
公开号:EP2070941A1
公开(公告)日:2009-06-17
The present invention relates to stereoselective synthesis of 7-α-substituted estra-4-ene-3,17-diones. Such compounds are valuable intermediates in the synthesis of 7-α-substituted estra-1,3,5(10)-triene-3,17-diols.
Key step in this synthesis is reacting a 3-keto-4,6-estradiene with a Grignard reagent selected from the group consisting of a magnesium-halide alkyl halide having at least 3 carbon atoms, a magnesium-halide alkenyl halide having at least 3 carbon atoms, and a magnesium-halide alkynyl halide having at least 3 carbon atoms, in the presence of a catalyst system comprising CuI.
The obtained 7α-alkyl, alkenyl and alkynyl halides can be used for the synthesis of pharmaceutically actice 7-α-substituted estra-1,3,5(10)-triene-3,17-diols (antiestrogens).
本发明涉及7-α取代的雌甾-4-烯-3,17-二酮的立体选择性合成。这些化合物是合成7-α取代的雌甾-1,3,5(10)-三烯-3,17-二醇的有价值的中间体。该合成的关键步骤是在CuI催化体系的存在下,将3-酮-4,6-雌二烯与从以下组中选择的Grignard试剂反应:至少有3个碳原子的镁卤代烷基卤化物,至少有3个碳原子的镁卤代烯基卤化物和至少有3个碳原子的镁卤代炔基卤化物。所得到的7α-烷基,烯基和炔基卤化物可用于合成具有药理活性的7-α取代的雌甾-1,3,5(10)-三烯-3,17-二醇(抗雌激素)。