Synthesis of D-Ribofuranosylpyrazolecarboxamides
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Several carbamoylpyrazole-nucleosides were synthesized by fusion of 1-<I>O</I>-acetyl derivatives of ribofuranoses with pyrazole derivatives in the presence of bis(<I>p</I>-nitrophenyl) hydrogen phosphate as an acidic catalyst. NMR and UV spectral studies revealed the orientation in <I>N</I>-glycosylation of the substituted pyrazoles.
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