What patent covers “glyburide synthesis” using cyclohexyl isocyanate sulfonamide?
I don’t have any patent document, publication number, or jurisdiction to tie those exact terms (“glyburide synthesis,” “cyclohexyl isocyanate,” and “sulfonamide”) to a specific patent record from the information provided. Without at least one of the following, I can’t accurately identify the patent or provide reliable claims/links:
- Patent publication number (WO / EP / US / JP, etc.)
- Assignee/company name (who filed it)
- Inventor name
- Filing year or priority year
- A specific reaction scheme or intermediate name from the patent
If you share any one of those, I can help pinpoint the exact patent and summarize what it claims about the synthesis step(s) that use cyclohexyl isocyanate and a sulfonamide.
How to search for patents with those exact chemical terms
A practical way to locate the right patent is to search patent databases using combinations of:
- “glyburide” plus either “cyclohexyl isocyanate” or “isocyanate”
- “glyburide” plus “sulfonamide”
- “cyclohexyl isocyanate” plus “sulfonamide” (then filter results that also mention glyburide)
You’ll often get the best results if you include synonyms/format variations used in patents, such as:
- “cyclohexyl isocyanate” vs “C6H11NCO”
- “sulfonamide” vs “sulphonamide” (US vs UK spelling)
Is this likely about a new route, or about a specific intermediate?
Patents that mention glyburide synthesis typically fall into two buckets:
- New or improved synthetic routes to glyburide (process patents)
- Specific intermediates and their preparation (which can still be considered key to “synthesis” even if the final drug is known)
If you paste the relevant paragraph, claim 1, or reaction step where cyclohexyl isocyanate and the sulfonamide appear, I can tell you which bucket it matches and what the scope likely covers.
When would such a patent expire (if it’s a process patent)?
In general, patent term depends on jurisdiction and filing details (e.g., 20-year term from the earliest effective filing date, plus possible adjustments). But I can’t give a correct expiry date for the specific patent you’re asking about without its publication number and earliest priority date.
What I need from you to identify the patent precisely
Reply with one item below (even partial is fine):
- The patent publication number (example format: WO2020xxxxx / US2019xxxxx / EP3xxxxxxx)
- The assignee/company name
- The inventors
- The priority year
- A screenshot or copied text of the claim/reaction that uses “cyclohexyl isocyanate” and “sulfonamide”
Once you provide that, I can map the exact patent to the synthesis you mean and summarize the relevant claims and technical steps.