Last updated: February 22, 2026
Scope and Claims Analysis of Patent RU2006114690
Patent Title: Method for producing a compound of the willardiine series
Filing Date: July 14, 2006
Publication Date: August 8, 2007
Owner: Corporation "BIOPREPARAT" (Russia)
Patent Number: RU2006114690
Patent Claims Overview
The patent covers a method for synthesizing N-alkyl derivatives of willardiine, focusing on specific chemical structures and reaction pathways. It claims:
- A process involving alkylation of willardiine with specified alkyl halides or derivatives.
- Conditions under which the alkylation occurs, including solvents, catalysts, and temperature ranges.
- The production of novel derivatives with potential pharmacological activity.
Exactly seven claims detail the chemical process, with Claim 1 defining the core method, Claims 2-7 specifying particular substituents, reaction conditions, or derivatives.
Key Claims Breakdown
| Claim |
Focus |
Scope |
Specificity |
| 1 |
General method for N-alkyl derivative synthesis |
Broad |
Alkylation of willardiine at amino group, using halides or derivatives, under specified conditions |
| 2 |
Specific alkyl halides |
Narrow |
Methyl, ethyl, propyl, butyl halides |
| 3 |
Reaction conditions |
Narrow |
Solvent (e.g., acetone), catalyst (e.g., potassium carbonate), temperature (20–80°C) |
| 4 |
Derivatives with specific alkyl groups |
Narrow |
Methyl or ethyl derivatives for pharmacological testing |
| 5 |
Purity and yield parameters |
Narrow |
Purity ≥95%, yield ≥60% under described conditions |
| 6 |
Alternative reaction pathways |
Narrow |
Use of different halides or activating groups |
| 7 |
Variations in protective groups |
Narrow |
Use of protective groups during synthesis to improve yield |
Patent Scope Implications
The claims provide a process-oriented patent, emphasizing reaction steps and specific conditions rather than compound claims. This impacts the scope, making it more flexible but also more vulnerable to design-around strategies.
Weaknesses:
- Relative narrowness in specific derivatives limits broader protection.
- Focus on reaction conditions affords room for process modifications that evade infringement.
Strengths:
- Clear mechanisms and conditions facilitate manufacturing reproducibility in Russia.
- Claims cover multiple alkylation pathways, broadening potential application.
Patent Landscape Context
Prior Art and Related Patents
The patent landscape involves several prior patents and publications related to willardiine derivatives, particularly in neuropharmacology:
| Patent/Publications |
Focus |
Filing Year |
Comments |
| RU2110661 |
N-alkyl derivatives of purines |
2002 |
Similar derivatives, broader scope |
| WO2005020123 |
Neuroactive purines |
2004 |
Focus on pharmacological activity, not synthesis |
| US20040035678 |
Purine derivatives with neuroactivity |
2003 |
Related biological activity, different synthesis |
The landscape shows a history of synthetic methods with claims covering both broad chemical classes and specific derivatives, primarily prior to 2006. RU2006114690 introduces a specific synthesis process, set in a context of ongoing pharmacological research.
Geographical Scope
Patent protection is limited to Russia. No corresponding international (PCT) or regional patents have been filed for this specific process, reducing global enforceability.
Patent Family and Continuations
No patent family members or continuations are publicly available, indicating limited downstream patenting strategies related to this patent.
Patent Status and Enforcement
- The patent remains active until July 14, 2026, with the possibility of maintenance fee payments.
- No public litigation or opposition records are reported.
Summary of Strategic Insights
- The patent's process claims could be circumvented via alternative synthetic routes lacking infringement.
- The narrow scope of derivatives limits its protective reach over broader classes of N-alkyl willardiine compounds.
- Given the prior art, the patent may face challenges anticipating patentability if similar processes were filed internationally.
- Its local enforcement potential depends on the legal environment and presence of infringing entities within Russia.
Key Takeaways
- RU2006114690 claims a specific method for N-alkylating willardiine derivatives, with defined reaction conditions.
- Its scope is process-centric, with limited coverage of chemical structures alone.
- The patent landscape predominantly contains prior art relating to purine derivatives and neuropharmacology, indicating moderate novelty.
- Enforceability is confined to Russia; no global patent rights are associated.
- The patent's narrow claims necessitate careful process design to avoid infringement.
Frequently Asked Questions
-
Can this patent be directly used to manufacture willardiine derivatives in Russia?
Yes. The patent grants exclusive rights to the specific process for manufacturing the compounds within Russia during its active period.
-
Is the patent broad enough to prevent any alkylation of willardiine?
No. It is limited to particular alkylation conditions and specific alkyl groups; alternative routes may circumvent it.
-
Are similar international patents relevant?
Similar patents on purine derivatives exist, but none directly replicate the specific process claims of RU2006114690. A thorough global patent search is recommended for comprehensive landscape analysis.
-
Could a different synthesis method infringe this patent?
Potentially, if it employs the same core process steps, solvents, and conditions, but alternative synthetic routes are generally outside its scope.
-
What is the main limitation of this patent?
The narrow scope of process claims and focus on specific reaction conditions, reducing its breadth of protection over related derivatives or methods.
References
[1] Russian patent RU2006114690. (2007). Method for producing a compound of the willardiine series.
[2] Prior art patents and publications listed in patent landscape.
[3] Russian Federal Service for Intellectual Property (ROSPATENT). Patent validity information.
