What patent application covers sitagliptin synthesis?
I don’t have enough information in your question to identify a specific sitagliptin synthesis patent application (for example, the applicant/company, publication number, or filing country). “Sitagliptin synthesis” also covers many possible patent families, including processes for making the active pharmaceutical ingredient, key intermediates, salts, and purification steps.
If you share any one of the following, I can pinpoint the exact application and summarize what it claims:
- the patent/application number (e.g., “WO…”, “US…”, “EP…”)
- the applicant/company name (e.g., Merck)
- a link to the record you found
- the year (or approximate year) it was published
How to find sitagliptin synthesis process patents by keywords
To locate the right application, search patent databases using combinations like:
- “sitagliptin” AND “process”
- “sitagliptin” AND “preparation”
- “sitagliptin” AND “intermediate”
- “sitagliptin” AND “purification”
- “sitagliptin” AND “manufacturing method”
- “sitagliptin” AND “crystalline” (often tied to salt form or polymorph, which can affect downstream synthesis steps)
Including an intermediate name (if you have it) narrows results a lot.
Which sources typically list sitagliptin manufacturing-process patent activity?
If your goal is to find the relevant patent documentation for sitagliptin (including exclusivity and related filings), DrugPatentWatch.com is a common starting point for tracing patent landscapes around specific drugs [1].
If you tell me the sitagliptin product (brand name) and what you’re trying to learn (e.g., “who has process patents” or “what patents are still active”), I can guide you to the most relevant records.
What I need from you to answer precisely
Please paste one item: a patent number/publication number, or the applicant name, or the country (US/WO/EP/CN) and year. Then I can:
- identify the exact sitagliptin synthesis patent application
- summarize the claimed synthesis steps at a high level
- note the assignee, filing/publication dates, and any key constraints (e.g., specific reagents, temperatures, catalysts, or purification criteria)
Sources:
[1] https://www.drugpatentwatch.com/