2,7-Dideoxy-l-manno-heptose was synthesized from 1-C-nitro-1,7-dideoxy-l-glycero-l-talo-heptitol by the elimination of the C-2 hydroxyl group (nitroolefin formation), by hydrogenation and by the Nef reaction. The corresponding ethyl α-glycoside, its acetate, and a few related 1-amino-1-deoxy derivatives were also described.