219843-76-2Relevant articles and documents
Abiraterone acetate reducing impurity and preparation method thereof
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, (2017/10/22)
The invention discloses an abiraterone acetate reducing impurity and a preparation method thereof. The impurity is 17-(3-pyridyl) androstane-3 beta-acetoxyl. The preparation method of the impurity includes the steps: taking dehydroepiandrosterone as a starting material; performing catalytic hydrogenation by palladium carbon to obtain (3 beta)-3-hydroxy-17-sterone; performing reaction by hydrazine hydrate to obtain 17-hydrazono-androstane-3 beta-alcohol; performing iodine substitution to obtain 17-iodine-androstane-3 beta-alcohol; reacting the 17-iodine-androstane-3 beta-alcohol with borane reagents under palladium catalysis to obtain 17-(3-pyridyl) androstane-3 beta-alcohol; performing acetic anhydride acetylation to obtain the abiraterone acetate reducing impurity 17-(3-pyridyl) androstane-3 beta-acetoxyl.
ALTERING STEROID METABOLISM FOR TREATMENT OF STEROID-DEPENDENT DISEASE
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Page/Page column 42, (2016/09/26)
A method of treating steroid-dependent disease such as prostate cancer in a subject is described that includes administering a therapeutically effective amount a CYP17A inhibitor and an effective amount of a 5- -reductase inhibitor to the subject.