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    • 81. 发明申请
    • 11B-FLUORO-3-ACETOXYESTRA-3,5-DIEN-17-ONE AND METHOD FOR THE PRODUCTION THEREOF
    • 11B-氟-3-乙酰氧基-3,5-二苯基-17-酮及其生产方法
    • US20110009654A1
    • 2011-01-13
    • US12739195
    • 2008-10-18
    • Orlin PetrovMatthias SchneiderRolf BohlmannStephan Vettel
    • Orlin PetrovMatthias SchneiderRolf BohlmannStephan Vettel
    • C07J75/00C07J1/00
    • C07J1/0059
    • The present invention relates to 11β-fluoro-3-acetoxyestra-3,5-dien-17-one as a suitable intermediate in the preparation of 11-fluoro-substituted steroids and to the process for preparation thereof. For this purpose, 11α-hydroxyestra-4-ene-3,17-dione is reacted with 1 to 3 equivalents of n-nonafluorobutanesulfonyl fluoride and 3 to 5 equivalents of diazabicycloundecene (DBU) at −40 to −20° C. in an organic aprotic solvent and, after an aqueous workup, reacted with 5 to 10 equivalents of acetic anhydride and 0.01 to 1 equivalent of a strong acid. The desired product precipitates spontaneously out of the reaction solution and is obtained in a very high purity by filtration. The process is notable for the very high yield, avoidance of a chromatographic purification of the product, a reduced proportion of wastes and significantly increased process throughput. The process according to the invention is therefore especially suitable for preparing 11β-fluoro-3-acetoxyestra-3,5-dien-17-one on a large industrial scale.
    • 本发明涉及11-氟-3-乙酰氧基雌-3,5-二烯-17-酮作为制备11-氟取代的类固醇的合适中间体及其制备方法。 为此,将11α-羟基雌-4-烯-3,17-二酮与1至3当量的正 - 九氟丁磺​​酰氟和3至5当量的二氮杂双环十一碳烯(DBU)在-40至-20℃下反应, 有机非质子溶剂,在水处理后,与5至10当量的乙酸酐和0.01至1当量的强酸反应。 所需产物自发地从反应溶液中沉淀出来,通过过滤得到非常高的纯度。 该方法是非常高的产量,避免产品的色谱纯化,减少的废物比例和显着增加的工艺生产量。 因此,根据本发明的方法特别适用于大型工业规模的制备11-全氟-3-乙酰氧基雌-3,5-二烯-17-酮。