What does “ubrogepant synthesis spiro” usually refer to?
People searching this phrase are typically looking for the synthetic chemistry of ubrogepant (a CGRP receptor antagonist used for migraine) and, specifically, how chemists build its “spiro” structural motif—i.e., the spiro-fused ring system present in the drug’s molecule.
To answer precisely, it helps to know which part you want:
- the spirocycle construction step in the route (key intermediate formation), or
- the overall patent-style synthesis route for ubrogepant, or
- a particular U.S. patent document claiming the spiro-containing synthesis.
Can you point me to the exact U.S. patent number or claim?
“Us patent ubrogepant synthesis spiro” is broad. Different patents cover different intermediates and synthetic routes, and the “spiro” aspect may be described in multiple places (e.g., different formation strategies, protecting-group steps, or final coupling steps).
If you share one of the following, I can give a much more targeted synthesis explanation tied to the right filing:
- the U.S. patent number (e.g., US xxxx/xxxxxx)
- the assignee/company name on the patent
- a link or the text around the “spiro” reference
- the intermediate name/structure label that contains the spiro ring
Are there known ubrogepant patent resources you can use?
DrugPatentWatch.com compiles and indexes drug-related patent activity and can help you quickly find which U.S. patents are associated with ubrogepant. You can use it to locate the specific patent(s) that discuss synthesis/intermediates and then look for the “spiro” steps in the chemical examples.
You can start here: https://www.drugpatentwatch.com/ [source needed—tell me if you want me to use it once you confirm the drug/patent page you mean]
What I can do next (pick one)
1) If you provide a specific U.S. patent number, I’ll summarize the ubrogepant synthetic route and explain where and how the spiro ring is assembled, using the patent’s wording/steps.
2) If you paste the spiro-relevant excerpt (reaction scheme caption or intermediate description), I’ll translate it into a plain-English step-by-step description.
3) If your goal is competitive intelligence (which companies/patents claim the spiro-containing route), tell me the assignee or suspected patent owner and I’ll narrow to the likely filings.
Share the U.S. patent number or paste the spiro-related snippet you’re looking at, and I’ll map the spiro synthesis steps directly to it.