CN100551929C — Δ9(11)甾体类化合物的制备方法
Assigned to Tianjin Pharmaceutical Research Institute Co ltd · Expires 2009-10-21 · 17y expired
What this patent protects
本发明涉及式(I)甾体类化合物的制备方法。它是以式(II)化合物和酸性脱水剂在有机溶剂中反应得到化合物(I),其中R 1 选自H,卤素,C 1-5 的酰氧基或OH;R 2 =OH时,1,2位不为双键;R 2 =C 1-5 的酰氧基;R 2 ,R 3 =O;R 2 R 3 =双键;其中R 4 选自α、β位C 1-3 烷基或卤素。Δ9(11)甾体类化合物的最高收率达99%,而且杂质Δ11(12)含量一般低于3%。产品含量提高,降低了成本,减少了污染。
USPTO Abstract
本发明涉及式(I)甾体类化合物的制备方法。它是以式(II)化合物和酸性脱水剂在有机溶剂中反应得到化合物(I),其中R 1 选自H,卤素,C 1-5 的酰氧基或OH;R 2 =OH时,1,2位不为双键;R 2 =C 1-5 的酰氧基;R 2 ,R 3 =O;R 2 R 3 =双键;其中R 4 选自α、β位C 1-3 烷基或卤素。Δ9(11)甾体类化合物的最高收率达99%,而且杂质Δ11(12)含量一般低于3%。产品含量提高,降低了成本,减少了污染。
Drugs covered by this patent
- Agamree (VAMOROLONE) · Catalyst Pharms
Bibliographic data sourced from FDA Orange Book + USPTO public records. Plain-English summary generated by AI grounded in source text. Patent term extensions (PTR, SPC, pediatric) may shift the effective expiry. Not legal advice.
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