METHOD FOR PREPARING PRECURSOR OF GENE EXPRESSION PROBE
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United States of America Patent
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Aug 22, 2016
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Aug 22, 2016
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A method for preparing a precursor of gene expression probe is revealed. First prepare 2-deoxy-2-fluoro-3,5-di-O-benzoyl-α-D-arabinofuranosyl bromide and 2,4-bis-O-(trimethylsilyl)-5-bromouracil respectively. Then use 2-deoxy-2-fluoro-3,5-di-O-benzoyl-α-D-arabinofuranosyl bromide and 2,4-bis-O-(trimethylsilyl)-5-bromouracil to perform a coupling reaction and get a 1-(3,5-di-O-benzoyl-2-deoxy-2-fluoro-β-D-arabinofuranosyl)-5-bromouracil. Next use 1-(3,5-di-O-benzoyl-2-deoxy-2-fluoro-β-D-arabinofuranosyl)-5-bromouracil generated and hexabutylditin to perform a substitution reaction in an anhydrous 1,4-dioxane solution and get 1-(3,5-di-O-benzoyl-2-deoxy-2-fluoro-β-D-arabinofuranosyl)-5-tributylstannyl)uracil. At last carry out debenzoylation of 1-(3,5-di-O-benzoyl-2-deoxy-2-fluoro-β-D-arabinofuranosyl)-5-tributylstannyl)uracil to get 5-tributylstannyl-1-(2-deoxy-2-fluoro-β-D-arabinofuranosyl)uracil (FSAU), a precursor of gene expression probe.
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