Branched-chain sugars. XXXV. The synthesis of L-rubranitrose (2,3,6-trideoxy-3-C-methyl-4-O-methyl-3-nitro-L-xylo-hexopyranose).

The title compound was stereoselectively synthesized from methyl 2,6-dideoxy-4-O-methyl-β-L-thero-hexopyranosid-3-ulose (11) through the successive conversions; cyanomesylation, reductive spiro aziridine formation, reductive ring-opening to the methyl-branched amino sugar, oxidation to the corresponding nitro sugar.