Abstract
The Bu 3SnH - AIBN induced radical cyclization of 6-bromo-6-deoxy-3- O -[( E )-2-ethoxycarbonylethenyl]-1,2- O -isopropylidene-α-???-allofuranose ( 1) gave ethyl 3,7-anhydro-6,8-dideoxy-1,2- O -isopropylidene-α-???- glycero -???- allo -nonofuranuronate ( 2) in 80% yield. Similar cyclizations of furanose derivatives and a synthesis of the sugar moiety of octosyl acids were described.
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