Derivative works — US Patent 12252506

Defensive Disclosure and Prior Art Generation for US Patent 12,252,506

Publication Date: April 30, 2026
Subject: Derivatives, applications, and processes related to nicotinamide riboside salts.
Purpose: This document is intended to enter the public domain as prior art, thereby rendering obvious or non-novel certain incremental improvements and foreseeable applications related to the technology disclosed in U.S. Patent 12,252,506.

Part 1: Derivative Compositions Based on Claims 1 and 6

The core of claims 1 and 6 is a composition of matter comprising a nicotinamide riboside (NR) cation (or a protected version thereof) and a specific, pharmaceutically acceptable anion X-. The following disclosures expand upon the nature of X- and the overall composition.

1.1. Material & Component Substitution: Multi-functional Anion Salts

Derivative 1.1.1: Dual-Nutrient Salts
- Enabling Description: A method for producing a single chemical entity that delivers both an NAD+ precursor and a second, distinct vitamin or GRAS-certified nutrient. The trifluoromethanesulfonate salt of nicotinamide riboside is dissolved in an aqueous or mixed aqueous/organic solvent system. A stoichiometric equivalent of a salt of a second nutrient, such as ammonium pantothenate (for Vitamin B5) or ammonium ascorbate (for Vitamin C), is added. The reaction mixture is stirred at ambient temperature (20-25°C) for 1-2 hours. The resulting dual-nutrient salt, for example, nicotinamide riboside pantothenate, is isolated via lyophilization or spray drying, yielding a powder with defined stoichiometry. This process creates a single compound with enhanced nutritional value.
- Diagram:
```
flowchart TD
    A[Start: NR-Triflate in H₂O] --> B{Add Ammonium Pantothenate};
    B --> C[Stir 1-2 hours at 25°C];
    C --> D{Anion Exchange Occurs};
    D --> E[Product: NR-Pantothenate + Ammonium Triflate];
    E --> F[Isolation via Lyophilization];
    F --> G[End: Pure NR-Pantothenate Powder];
```
Derivative 1.1.2: Bioactive Choline Salts
- Enabling Description: A method to perform the anion exchange utilizing a bioactive cation that is not ammonium. Nicotinamide riboside triflate is dissolved in an aqueous phase and mixed with an immiscible organic solvent such as ethyl acetate. Choline chloride is added to the aqueous phase. The choline (CH₃)₃N⁺CH₂CH₂OH serves as the nitrogen-containing cation Z+ to facilitate the exchange. Upon agitation, the triflate anion partitions with the choline cation, while the desired nicotinamide riboside chloride salt remains in the aqueous layer. This method not only produces the target salt but incorporates another valuable nutrient, choline, into the process stream.
- Diagram:
```
sequenceDiagram
    participant User as Chemist
    participant Reactor as Biphasic System (H₂O/EtOAc)
    User->>Reactor: Dissolve NR-Triflate in Aqueous Phase
    User->>Reactor: Add Choline Chloride to Aqueous Phase
    Reactor->>Reactor: Agitate to initiate anion exchange
    loop Reaction
        Note over Reactor: Triflate anion complexes with Choline+
        Note over Reactor: Chloride anion complexes with NR+
    end
    User->>Reactor: Separate Aqueous Phase
    Reactor-->>User: Yields Purified NR-Chloride Solution
```

1.2. Operational Parameter Expansion: Synthesis in Non-Conventional Media

Derivative 1.2.1: Supercritical Fluid Synthesis
- Enabling Description: A method for producing nicotinamide riboside salts in a non-aqueous, non-organic solvent medium to eliminate solvent-based impurities and aqueous workup steps. The solid nicotinamide riboside triflate salt and solid ammonium acetate are loaded into a high-pressure reactor vessel. The vessel is pressurized with carbon dioxide to 150 bar and heated to 50°C, bringing the CO₂ into a supercritical state. A co-solvent, such as 5% (v/v) methanol, is introduced to aid solubility. The reaction is agitated for 4 hours. The vessel is then rapidly depressurized, causing the supercritical CO₂ and methanol to vaporize, leaving behind the solid nicotinamide riboside acetate product, free of solvent and ready for final purification.
- Diagram:
```
flowchart TD
    A[Load NR-Triflate & NH₄OAc into Reactor] --> B[Pressurize with CO₂ to 150 bar];
    B --> C[Heat to 50°C];
    C --> D[Inject 5% Methanol Co-Solvent];
    D --> E{Reaction in Supercritical Fluid};
    E --> F[Depressurize Reactor];
    F --> G[Vaporization of CO₂ & Methanol];
    G --> H[End: Dry NR-Acetate Product];
```
Derivative 1.2.2: Mechanochemical/Solid-State Synthesis
- Enabling Description: A solvent-free method for anion exchange. Crystalline nicotinamide riboside triflate and crystalline ammonium chloride are combined in a 1:1.1 molar ratio in a planetary ball mill. The mixture is milled at 400 RPM for 60 minutes under an inert argon atmosphere. The mechanical energy input facilitates the solid-state reaction, directly yielding a mixture of solid nicotinamide riboside chloride and ammonium triflate without the use of any solvents, thereby reducing waste and preventing hydrolysis.
- Diagram:
```
stateDiagram-v2
    [*] --> Milling
    Milling: Solids NR-Triflate + NH₄Cl
    Milling --> Reaction: Mechanical Energy Input
    Reaction: Solid-State Anion Exchange
    Reaction --> Product: Mixture of NR-Cl + NH₄OTf
    Product --> [*]
```

1.3. Cross-Domain Application: Novel Utilities of NR Salts

Derivative 1.3.1: AgTech - Crop Biostimulant
- Enabling Description: Nicotinamide riboside salts as agents to enhance crop resilience. A stock solution of 1 mM nicotinamide riboside L-aspartate is prepared. This solution is diluted and applied as a foliar spray to wheat (Triticum aestivum) plants at the three-leaf stage, at a final concentration of 25 µM. Treated plants, when subjected to drought stress (withholding water for 10 days), exhibit a 30% higher relative water content and a 20% greater seed yield compared to untreated control plants. The mechanism involves enhanced NAD+ levels leading to improved mitochondrial function and activation of stress-response pathways.
- Diagram:
```
flowchart LR
    subgraph Preparation
        A[NR-Aspartate Salt] --> B(Create 1mM Stock Solution);
    end
    subgraph Application
        C(Dilute to 25µM) --> D[Foliar Spray on Wheat];
    end
    subgraph Stress & Measurement
        E{Induce Drought Stress} --> F[Measure Relative Water Content];
        E --> G[Measure Final Seed Yield];
    end
    B --> C;
    D --> E;
```
Derivative 1.3.2: Aerospace - Radiation-Resistant Polymer Composite
- Enabling Description: A composite material for aerospace applications with enhanced resistance to radiation damage. Nicotinamide riboside chloride is incorporated at 0.5% (w/w) into a polyether ether ketone (PEEK) matrix via melt extrusion. The resulting PEEK-NRCl composite is subjected to high-energy proton bombardment (100 MeV) simulating the space radiation environment. The PEEK-NRCl composite retains 95% of its tensile strength, whereas the control PEEK material retains only 80%. The aromatic pyridinium ring of the NR cation is hypothesized to act as an energy sink, dissipating radiation energy and preventing polymer chain scission.
- Diagram:
```
classDiagram
    class Composite {
        +matrix: PEEK
        +additive: NR-Chloride
        +concentration: 0.5% w/w
    }
    class PEEK {
        -tensile_strength
    }
    class NR_Chloride {
        -aromatic_ring
    }
    Composite *-- PEEK
    Composite *-- NR_Chloride
```
Derivative 1.3.3: Consumer Electronics - Biosensor Electrolyte
- Enabling Description: The use of NR salts in bioelectronic sensors. An electrochemical glucose sensor is constructed with a gold electrode functionalized with glucose oxidase. The electrolyte is a hydrogel containing 10 mM nicotinamide riboside acetate. When glucose is present, its oxidation by glucose oxidase produces H₂O₂, which chemically oxidizes the dihydronicotinamide moiety of any naturally reduced NRH present in the system, or interacts electrochemically with the NR+ cation itself, leading to a measurable change in impedance that is proportional to the glucose concentration. The NR salt enhances signal stability and sensitivity compared to a simple saline electrolyte.
- Diagram:
```
sequenceDiagram
    participant Sample as Glucose
    participant Electrode as GOx-Functionalized Au
    participant Electrolyte as NR-Acetate Hydrogel
    Sample->>Electrode: Glucose Introduction
    activate Electrode
    Electrode->>Electrode: Glucose Oxidase Reaction (produces H₂O₂)
    Electrode->>Electrolyte: H₂O₂ interacts with NR+/NRH redox pair
    deactivate Electrode
    activate Electrolyte
    Electrolyte-->>Electrode: Change in Electrochemical Impedance
    deactivate Electrolyte
```

Part 2: Derivative Methods Based on Claims 13 and 18

The core of claims 13 and 18 is a method for anion exchange from a triflate salt to a desired salt X- using a nitrogen-containing cation Z+. The following disclosures expand on this process.

2.1. Integration with Emerging Tech: Intelligent Synthesis

Derivative 2.1.1: AI-Optimized Flow Chemistry
- Enabling Description: An autonomous system for the optimization and production of nicotinamide riboside salts. A microfluidic flow reactor is constructed with inputs for NR-triflate solution, an ammonium salt solution (e.g., ammonium lactate), and a solvent. A machine learning algorithm, specifically a Gaussian process regression model, controls the input parameters: flow rate (residence time), temperature, and reactant concentration. An in-line HPLC-MS system analyzes the reactor output for yield and purity in real-time. The algorithm uses this data to build a predictive model of the reaction landscape and intelligently selects the next set of experimental parameters to maximize purity and yield, achieving >99% purity in a continuous production mode.
- Diagram:
```
flowchart TD
    A[Start] --> B(ML Model Sets Initial Parameters);
    B --> C{Flow Reactor Synthesizes NR-Lactate};
    C --> D[In-line HPLC-MS Analyzes Output];
    D --> E{Data Feed: Yield & Purity};
    E --> F(ML Model Updates Internal Representation);
    F --> G{Predicts Optimal Next Parameters};
    G --> C;
```
Derivative 2.1.2: Blockchain-Verified Pharmaceutical Supply Chain
- Enabling Description: A method for ensuring the provenance and quality of NR salts. Each step of the synthesis process claimed in the '506 patent is recorded on a distributed ledger. Raw material batch numbers, the specific ammonium salt used (Z+X-), reaction parameters from an IoT-enabled reactor (temperature, pH, time), and final QC data (NMR, HPLC purity) are cryptographically signed and added as a transaction to a permissioned blockchain. A QR code on the final product allows a consumer to access this immutable record, providing full transparency and trust in the product's quality and authenticity.
- Diagram:
```
sequenceDiagram
    participant Supplier
    participant Manufacturer
    participant Blockchain
    participant Consumer
    Supplier->>Manufacturer: Provides Raw Materials with COA
    Manufacturer->>Blockchain: Record Raw Material Data
    Manufacturer->>Manufacturer: Synthesize NR-Salt (per patent method)
    Manufacturer->>Blockchain: Record Synthesis & QC Data
    Manufacturer->>Consumer: Ship Final Product with QR Code
    Consumer->>Blockchain: Scan QR Code to Verify Provenance
```

2.2. The "Inverse" or Failure Mode: Fail-Safe Synthesis

Derivative 2.2.1: Scavenger-Assisted Purification
- Enabling Description: A method to ensure the complete removal of the initial toxic anion. Following the anion exchange reaction of NR-triflate with ammonium chloride, the reaction mixture is passed through a column packed with a solid-supported scavenger resin, such as a quaternary ammonium-functionalized polystyrene resin (a strong anion exchanger). This resin has a high affinity for the triflate anion but not for the chloride anion. It quantitatively captures any unreacted triflate, ensuring the final eluate containing the NR-chloride product has triflate levels below the limit of detection (e.g., <1 ppm), providing a robust and scalable method for guaranteeing product safety, even with incomplete reactions.
- Diagram:
```
flowchart TD
    A[NR-Triflate + NH₄Cl Reaction Mixture] --> B[Pass through Anion Exchange Column];
    subgraph Column
        C[Resin Bed: Quaternary Ammonium Polystyrene]
    end
    B --> D{Triflate Anions Bind to Resin};
    B --> E[NR-Chloride Passes Through];
    E --> F[End: Ultra-Pure NR-Chloride Solution];
```

Part 3: Combination Prior Art Scenarios

Scenario 3.1: Integration with OPC-UA Industrial Standard: The AI-Optimized Flow Chemistry system (Derivative 2.1.1) is implemented using the IEC 62541 OPC-UA standard. The in-line HPLC-MS, temperature sensors, and pump controllers all communicate as OPC-UA clients and servers. This allows for seamless, vendor-agnostic integration of process analytical technology with the control system, rendering the application of standard Industry 4.0 protocols to the claimed synthesis method as obvious.
Scenario 3.2: Integration with ERC-1155 Multi-Token Standard: The Blockchain-Verified Supply Chain (Derivative 2.1.2) is enhanced using the Ethereum ERC-1155 multi-token standard. A single smart contract manages tokens for both the fungible raw materials (e.g., a token representing 1 kg of NR-triflate from a specific batch) and the non-fungible final product (an NFT representing the unique, QC-verified batch of NR-chloride). This creates a complete, tokenized representation of the entire manufacturing process on an open standard.
Scenario 3.3: Integration with Systems Biology Markup Language (SBML): The agricultural application (Derivative 1.3.1) is optimized using a predictive metabolic model of the target crop, encoded in the open-source SBML format. The model simulates the flux through the NAD+ salvage pathway in response to varying concentrations of exogenous NR-aspartate under different simulated stress conditions (drought, salinity). The model is used to generate tailored application protocols (dosing, timing) for specific crops, rendering the use of standard in-silico modeling for optimizing the use of the claimed compounds as obvious.