5173-46-6Relevant articles and documents
- 4, 9 - Diene - 3, 17 - dione female ol the preparation method of the (by machine translation)
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Paragraph 0131; 0142-0146; 0159-0163; 0176-0180; 0193-0197, (2019/02/13)
The invention provides a female neurosteroidogenesis - 4, 9 - diene - 3, 17 - dione of preparation method, the method comprising: in order to have the general formula I compound as the reaction raw material, to said reaction raw materials are mixed anhydride, Grignard reaction, ring-closing reaction, hydrolysis and ring-closing reaction, to obtain the compound having the structural formula V of; the compound has the formula V of the synthetic route of the are as follows: The embodiment of the invention provides a female steroid - 4, 9 - diene - 3, 17 - dione has the simple operation steps in the synthesis process, the raw materials, organic solvent consumption is small, after treatment is easy and easy to enlarge production and the like. (by machine translation)
Preparation method of estra-4,9-diene-3,17-dione
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Paragraph 0033; 0034; 0035, (2019/01/08)
The present invention belongs to the field of synthesis of estra-4,9-diene-3,17-dione and discloses a preparation method of estra-4,9-diene-3,17-dione. The preparation method comprises preparation ofGrignard reagent, Grignard reaction, oxidation and hydrolysis reaction, and tandem cyclization reaction. The synthesis route designed in the present invention is characterized in that delta-lactone isused as the starting material and can be transformed to estra-4,9-diene-3,17-dione through three steps, namely, Grignard reaction, oxidation and hydrolysis reaction, and tandem cyclization reaction.The preparation method of estra-4,9-diene-3,17-dione is low in cost, low in environmental pollution, low in water consumption, easy to control, and high in yield with no need for highly toxic chemicals.
METHOD FOR PREPARING 4-[17β-METHOXY-17α-METHOXYMETHYL-3-OXOESTRA-4,9-DIEN-11β-YL]BENZALDEHYDE (E)-OXIME (ASOPRISNIL)
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Page/Page column 17-18; Sheet 2/3, (2008/06/13)
The present invention relates to a method for the reliable and reproducible preparation of 4-[17β-methoxy-17α-methoxymethyl-3-oxoestra-4,9-dien-llβ- yl]benzaldehyde (E)-oxime (asoprisnil) on the pilot and manufacturing scale. Asoprisnil, which is prepared by this method, is distinguished by a very good physical stability and is therefore particularly suitable for the manufacture of solid pharmaceutical forms (tablets, coated tablets, etc.).