2',3'-Dideoxy-L-C-nucleosides, ceropentofuranosyl)pyrazolo[1,5-a]-1,3,
5-triazines (9 and 10), eropentofuranosyl)-3H,5H-pyrrolo[3,2-d]pyrimid
ines (17 and 18), tofuranosyl)-4-oxo-3H,5H-pyrrolo[3,2-d]pyrimidines (
23 and 24) and 5-(2,3-dideoxy-L-glyceropentofuranosyl)pyrimidines (28
and 29) have been synthesized from L-gulonic gamma-lactone 1.