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d4TMP delivery from 7-substituted cycloSal-d4TMPs.

C Meier1, J T Renze, J Balzarini

  • 1Institute of Organic Chemistry, University of Hamburg, Hamburg, Germany. chris.meier@chemie.uni-hamburg.de

Nucleosides, Nucleotides & Nucleic Acids
|October 21, 2003
PubMed
Summary
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New benzyl-substituted cycloSal-d4T monophosphates were synthesized. Some selectively released the target d4TMP, while others formed stable diesters, showing unexpected resistance to degradation.

Area of Science:

  • Medicinal Chemistry
  • Organic Synthesis
  • Nucleoside Analogues

Background:

  • Cyclosal-L-nucleosides are investigated as prodrugs for antiviral agents.
  • Selective release of the active nucleoside triphosphate is crucial for efficacy.
  • Previous derivatives showed varying degrees of d4TMP release.

Purpose of the Study:

  • To synthesize novel benzyl-substituted cycloSal-d4T monophosphates.
  • To evaluate their selective release of d4TMP.
  • To investigate the stability of resulting benzyl phosphate diesters.

Main Methods:

  • Synthesis of benzyl-substituted cycloSal-d4T monophosphates.
  • Chemical analysis to determine release products.
  • Stability studies of the diester intermediates.

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Main Results:

  • Two compounds selectively released d4TMP as the sole product.
  • Two other compounds yielded benzyl phosphate diesters.
  • These diesters exhibited surprising stability, resisting degradation to release d4TMP.

Conclusions:

  • Novel cycloSal-d4T monophosphates offer potential for selective d4TMP delivery.
  • The stability of the benzyl phosphate diesters presents a new challenge or characteristic for prodrug design.
  • Further research is needed to understand and potentially modulate diester stability.