Df. Ewing et al., A REGIOSPECIFIC AND STEREOSELECTIVE REARRANGEMENT OF A 1-BETA-D-RIBOFURANOSYL-5-AMINOIMIDAZOLE TO A 4-BETA-D-RIBOFURANOSYLAMINOIMIDAZOLE, Nucleosides & nucleotides, 14(3-5), 1995, pp. 367-368
Ethyl (beta-D-ribofuranosylamino)imidazole-5-carboxylate 8 was synthes
ized from ethyl idene-beta-D-ribofuranosyl)imidazole-4-carboxylate 4 b
y quaternization and subsequent base-catalysed ring-opening and closur
e.