Synthesis of the Liposidomycin Diazepanone Nucleoside

The synthesis of the liposidomycin degradation product 4 from d-glucose establishes its stereochemistry as 5‘S,6‘S and, by incorporation of the earlier diazepanone relative stereochemical assignment, establishes the absolute stereochemistry of the liposidomycins 1 and 2 as 5‘S,6‘S,2‘ ‘‘S,3‘‘‘S.