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- W101308516 abstract "Tosylation and mesylation of adenine (1) at room temperature give regioselectively N9-sulfonylated purines 2 and 5. Excess of TsCl or MsCl at higher reaction temperatures leads to formation of unstable N6,N9-disulfonylated products 3 and 6, which easily transform into the corresponding N6-monosulfonylated product 4. Two N-sulfonylated purine nucleoside derivatives 12 and 15 have also been prepared. 1D/2D NMR determined the site of sulfonylation and the spatial arrangement of the substituents. MS spectra showed unexpected rearrangement of protonated molecular ions that occurs upon the loss of SO2." @default.
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- W101308516 date "2001-04-02" @default.
- W101308516 modified "2023-10-18" @default.
- W101308516 title "Synthesis, NMR and MS Study of Novel N-Sulfonylated Purine Derivatives" @default.
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