What patent covers oliceridine synthesis, and what does “spiro” refer to?
“Spiro” usually points to a structural feature (a spirocyclic ring system) in an organic molecule. If you’re seeing “Oliceridine synthesis patent spiro” in searches, it typically means the patent text or claim set describes oliceridine (or a related intermediate) using language like “spiro” to distinguish the chemical scaffold being claimed.
Because the exact patent number (or a link to the document you saw) isn’t provided, the key practical step is to match the word “spiro” to a specific claim or example in a specific patent family, then confirm whether that claim is:
- about the final drug molecule,
- about a key intermediate used to synthesize oliceridine, or
- about a method/route of synthesis tied to a spiro-containing intermediate.
If you share the patent number or paste the claim snippet that mentions “spiro,” I can identify precisely what the “spiro” part is doing in that patent (scaffold definition vs. synthetic intermediate vs. process step).
How do you find the exact “spiro” patent language for oliceridine synthesis?
A targeted approach is to search within patent text (Google Patents, Espacenet, or the USPTO full-text) using combinations of:
- “oliceridine” AND “spiro”
- “oliceridine” AND “intermediate”
- “spiro” AND “oliceridine” (often surfaces chemical structure descriptions linked to the claim)
- “spiro” AND “example” (often points to preparation steps)
Once you locate the relevant section, look for where “spiro” appears:
- in a claim (strongly indicates what’s protected),
- in the description of a compound definition (could still map to a claimed intermediate),
- or only in a background/optional example (less likely to define the protection scope).
Is the patent about oliceridine itself, or about making a specific spiro intermediate?
Patents covering synthesis can protect different things, even within the same drug family:
- Method claims: “A process for preparing oliceridine” (or preparing a spirocyclic intermediate).
- Intermediate compound claims: a spiro compound used en route to oliceridine.
- Salt/form claims: if the spiro-containing compound is used as a specific salt or protected form.
If “spiro” appears next to a named intermediate (or a structure label like “Compound X”), that’s usually a clue that the patent is trying to lock down the synthetic route by controlling a key intermediate rather than only the finished molecule.
What do “spiro” claims usually mean for patent scope (and enforcement risk)?
When a patent ties protection to a specific spirocyclic scaffold, it often narrows the claim scope to compounds that contain that exact spiro ring system. That can matter for:
- whether alternative synthesis routes “design around” the spiro intermediate,
- whether closely related structures would still infringe,
- whether generic/alternative manufacturers can route through different intermediates that avoid the claimed spiro structure.
The only way to say which scenario applies is to compare the “spiro” language in the claim to the structure of the intermediate(s) described in the examples.
What to provide so I can answer precisely
To give a definite “this patent does X” answer, please provide one of:
- the patent number (or application number), or
- a link to the patent document, or
- the exact text around the word “spiro” from the claim or example.
Then I can tell you:
- which compound is spiro (and where it fits in the synthesis),
- whether the claim is for a method or an intermediate,
- and what that implies for synthesis alternatives and potential design-arounds.
Sources
No sources were provided, and no specific patent document was identified from your question alone. If you share the patent number/link or the “spiro” snippet, I can cite and extract the exact supporting sections.