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- W844546796 abstract "Several oxidizing agents were examined for their ability to demethylthiolate adenosine- and cytidine 5'-S-methyl phosphorothiolates. Iodine dissolved in an aqueous potassium iodide solution or in dimethyl sulfoxide (DMSO) was the most effective demethylthiolating agent of those tested in the present study, rapidly giving the demethylthiolated products in quantitative yields. The iodine-DMSO solution demethylthiolated the ribonucleoside 5'-S-methyl phosphorothiolates to give ribonucleoside 5'-monophosphates even under anhydrous conditions, DMSO acting as an oxygen donor in this reaction. Hydrogen peroxide has high demethylthiolating ability in spite of its low reaction rate. Isoamyl nitrite, an effective demethylthiolating agent for O-alkyl S-methyl phosphorothiolates, was not effective for the demethylthiolation of ribonucleoside 5'-S-methyl phosphorothiolates, because the unprotected amino groups of the S-methyl nucleotides were attacked by the reagent to give deaminated products. N-Chlorosuccinimide had no effect on the demethylthiolation of S-methyl phosphorothiolates." @default.
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- W844546796 date "1984-01-01" @default.
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- W844546796 title "A new phosphorylating agent, 2-methylthio-4H-1,3,2-benzodioxaphosphorin 2-oxide. Part X. Demethylthiolating agents for ribonucleoside 5'-S-methyl phosphorothiolates." @default.
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- W844546796 doi "https://doi.org/10.1271/bbb1961.48.2355" @default.
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