2'-Fluoro-4'-Substituted Nucleoside Analogues for Anti-Viral Therapy
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Solution Overview
Problem
Current nucleoside reverse transcriptase inhibitors for HIV, HBV, and HCV have limitations such as reduced efficacy and severe toxic side effects, necessitating the development of new compounds with improved activity and reduced toxicity.
Innovation Solution
The synthesis of 2′-fluoro-4′-substituted nucleoside analogues with specific chemical modifications, including fluoric groups, alkynyl, and azide structures, which are used to create anti-viral drugs with enhanced activity and reduced toxicity through a series of chemical reactions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If current nucleoside reverse transcriptase inhibitors are used, then anti-viral activity is achieved, but severe toxic side effects and drug resistance occur
Solution Approach 1:
The patent introduces fluorine substitution at the 2' position and specific substituents at the 4' position of the nucleoside ring, creating localized chemical modifications that alter the compound's biological properties. This local quality change enhances anti-viral activity while reducing toxic side effects and drug resistance compared to conventional nucleoside analogues
Solution Approach 2:
The patent systematically varies chemical parameters including the type of substituent at the 4' position (R1), the nature of the linker (R2), and the terminal functional group (R3) to optimize the balance between anti-viral efficacy and toxicity profile, achieving improved therapeutic index
2Reliability
If current nucleoside reverse transcriptase inhibitors are used, then initial anti-viral effect is achieved, but efficacy is limited and drug resistance develops
Solution Approach 1:
The fluorine atom at the 2' position and specific 4' substituents create localized structural features that enhance binding affinity to reverse transcriptase while preventing resistance mutations, thereby maintaining long-term anti-viral efficacy
Solution Approach 2:
The patent combines fluorinated sugar moiety with specifically designed nucleobase substituents to create composite nucleoside analogues that exhibit both potent initial anti-viral activity and sustained long-term efficacy without resistance development
Data Source
AI summary
The present invention provides 2′-fluorine-4′-substituted-nucleoside analogs or their pro-drugs or 5′-phosphate esters (including the pro-drugs of the 5′-phosphate esters), preparation methods and uses thereof. The compounds have the general formula as follows:wherein:The compounds are used in the synthesis of drugs for the treatment of virus infection, especially for the treatment of HBV, HCV or HIV infection.