Acyclic nucleoside/nucleotide analogues with an imidazole ring skeleton

Area of Science:

• Medicinal Chemistry
• Organic Synthesis
• Virology

Background:

• Acyclic nucleoside and phosphonate analogues are crucial in antiviral drug discovery.
• Imidazole-containing compounds have shown promise in medicinal applications.
• Developing novel antiviral agents remains a priority to combat viral infections.

Purpose of the Study:

• To synthesize and characterize novel acyclic nucleoside and acyclic nucleoside phosphonate analogues incorporating an imidazole ring.
• To evaluate the in vitro antiviral activity of these synthesized compounds against a range of herpes and respiratory viruses.
• To identify potent antiviral agents, particularly against measles virus.

Main Methods:

• Synthesis of various imidazole-containing acyclic nucleoside and phosphonate analogues.
• Preparation of prodrugs and protected precursors for selected compounds.
• In vitro screening of synthesized compounds against a panel of herpes and respiratory viruses.
• Determination of antiviral activity, including EC50 and selectivity index (SI) values.

Main Results:

• Several acyclic nucleoside and phosphonate analogues with imidazole cores were successfully synthesized.
• Compound 9, a phosphonate analogue, exhibited potent in vitro activity against measles virus.
• Compound 9 demonstrated a low EC50 value (<2.5 microg/mL) and a high SI value (>176) against measles virus.

Conclusions:

• The synthesized imidazole-containing acyclic nucleoside phosphonate analogues represent a promising class of antiviral compounds.
• The phosphonate analogue 9 is a particularly strong candidate for further development as an anti-measles virus therapeutic.
• Further research into these analogues could lead to new treatments for viral diseases.