Synthesis of ‘Reversed’ Pyrimidine and Pyrazolo[1,5-a]pyrimidine-C-Nucleoside Analogues from Push-Pull Functionalized α-d-xylo-Hept-5-ulofuranurononitrile - Hashmi, Imran Ali; Ali, Firdous Imran; Feist, Holger; Michalik, Manfred; Reinke, Helmut; Peseke, Klaus (Synthesis, 2007)