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Deoxyribonucleoside phosphoramidites.

A Wilk1, A Grajkowski, M K Chmielewski

  • 1Food and Drug Administration, Bethesda, Maryland, USA.

Current Protocols in Nucleic Acid Chemistry
|April 23, 2008
PubMed
Summary
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This study details the preparation of deoxyribonucleoside phosphoramidites using a novel protective group. This method prevents nucleobase alkylation during oligonucleotide synthesis, improving DNA chemistry.

Area of Science:

  • Organic Chemistry
  • Nucleic Acid Chemistry
  • Synthetic Chemistry

Background:

  • Oligonucleotide synthesis requires robust protecting groups for phosphoramidites.
  • Nucleobase alkylation is a common side reaction during deprotection steps.
  • Developing new protecting groups is crucial for efficient DNA synthesis.

Purpose of the Study:

  • To present the synthesis of deoxyribonucleoside phosphoramidites with a new P(III) protecting group.
  • To demonstrate the efficacy of the 4-[N-methyl-N-(2,2,2-trifluoroacetyl)amino]butyl group in preventing nucleobase alkylation.
  • To describe two distinct synthetic routes for preparing these novel phosphoramidites.

Main Methods:

  • Preparation of deoxyribonucleoside phosphoramidites using a 4-[N-methyl-N-(2,2,2-trifluoroacetyl)amino]butyl group.

Related Experiment Videos

  • Two synthetic pathways involving phosphordichloridite or bis-(N,N-diisopropylamino)chlorophosphine intermediates.
  • Phosphinylation of protected deoxyribonucleosides.

    • Main Results:

    • Successful synthesis of novel phosphoramidites with the specified protecting group.
    • Demonstration that the protecting group circumvents nucleobase alkylation during deprotection.
    • Detailed protocols for two distinct synthetic routes are provided.

    Conclusions:

    • The developed phosphoramidites offer an improved strategy for oligonucleotide synthesis.
    • The new protecting group effectively prevents unwanted side reactions.
    • These findings contribute to advancing DNA chemical synthesis methodologies.