Competitive Factory Price for 2,2'-Cyclouridine Directly from Production Line

The unique locked conformation of 2,2'-Cyclouridine makes it an indispensable intermediate and tool in several scientific domains.

a. Key Intermediate in Antiviral Drug Synthesis (Most Important Application)
The primary industrial application of 2,2'-Cyclouridine is as a synthetic raw material for producing 2'-modified nucleosides, particularly 2'-deoxy-2'-fluoro-nucleosides.

• Mechanism: The 2,2'-cyclo bridge acts as a masked precursor. Through a selective ring-opening reaction using reagents like anhydrous hydrogen fluoride (HF) or other fluorinating agents, the C-O bond is cleaved, and a fluorine atom is introduced specifically at the 2'-position.

• Outcome: This produces 2'-deoxy-2'-fluorouridine, which is a critical building block for FDA-approved antiviral drugs such as Sofosbuvir (for Hepatitis C) and various anti-herpes virus agents. This route is highly favored because the rigid cyclic structure ensures perfect stereochemical control (100% β-D-configuration), preventing the formation of unwanted anomers.

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b. RNA Structure and Conformational Analysis
In molecular biology research, 2,2'-Cyclouridine is used to create locked nucleic acid (LNA) analogs or to study RNA backbone dynamics. The locked N-type (C3'-endo) sugar pucker mimics the conformation found in A-form RNA helices.

• Research Tool: When incorporated into short RNA oligonucleotides, it restricts flexibility, allowing researchers to study the thermodynamic and structural effects of pre-organized sugar rings. It is used to probe the mechanism of RNA-cleaving enzymes (ribozymes) and RNases, as this rigid analog often resists enzymatic cleavage, serving as a stable probe.

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c. Therapeutic Applications Beyond Anti-infection

• Anti-Cancer Research: Certain derivatives of 2,2'-Cyclouridine have shown potential as inhibitors of uridine phosphorylase (UPase), an enzyme overexpressed in some tumors. By inhibiting UPase, these compounds can increase the local concentration of endogenous uridine, which has been linked to reduced toxicity of chemotherapeutic agents like 5-Fluorouracil (5-FU).

• Antimicrobial Agents: The scaffold is also explored for developing novel anti-tuberculosis or anti-parasitic agents, as the locked nucleoside can interfere with the RNA metabolism of pathogens without affecting host polymerases significantly.

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d. Chemical Biology Probes
Because it lacks a free 2'-OH, 2,2'-Cyclouridine cannot participate in standard phosphodiester bond formation as a chain initiator. This property is exploited to synthesize terminators for enzymatic DNA/RNA sequencing or for creating "cap" structures in synthetic mRNA to improve translational efficiency.

As a raw material, 2,2'-Cyclouridine is far more than a simple uridine derivative. Its rigid ether bridge confers high thermal stability, unique solubility, and specific chemical reactivity. Its irreplaceable role as a stereospecific precursor for fluorinated nucleosides (like those in Sofosbuvir) underpins its industrial value. Simultaneously, its rigid structure makes it a powerful probe for understanding RNA folding and a promising scaffold for new anticancer and antimicrobial therapies.