Scheme 2.
Synthesis of Arabinofuranosides a
aReagent and conditions: (i): Ac2O, pyridine, 24 h, rt (73%); (ii): KSCOCH3, DMF, 24 h, rt (60%); (iii) 0.1 M methanolic NaOMe 2 h, 50 °C then Amberlite™ IR120; (iv) imidazole, I2, PPh3, THF, 0 to 65 °C, (65 %).