Synthesis of D-Psico- and D-Fructofuranosyl Nucleosides.

Abstract
The condensation of 6-chloropurine with peracylated psicofuranosyl and fructofuranosyl chlorides, using Yamaoka''s procedure, afforded, respectively, the .beta. and .alpha. anomers of the corresponding purine nucleosides. A similar result was obtained when silylated uracil was reacted with peracylated ketose. The first chemical synthesis of 1-.beta.-D-fructofuranosyluracil was also accomplished from 1-.beta.-D-psicofuranosyluracil via the 2,3''-anhydro derivative. [These types of nucleoside have antibiotic and antitumor properties.].