AU2018341782A1 — Method for preparing oxaspirocycle derivative, and intermediate thereof
Assigned to Jiangsu Hengrui Medicine Co Ltd · Expires 2020-04-16 · 6y expired
What this patent protects
The present invention relates to a method for preparing an oxaspirocycle derivative, and an intermediate thereof. The method reduces reaction steps, improves reaction yield, is simple and easy to operate, and is favorable for industrial large-scale production.
USPTO Abstract
The present invention relates to a method for preparing an oxaspirocycle derivative, and an intermediate thereof. The method reduces reaction steps, improves reaction yield, is simple and easy to operate, and is favorable for industrial large-scale production.
Drugs covered by this patent
- Olinvyk (OLICERIDINE) · Trevena
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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