Abstract The reaction of methyl 2,3,4-tri- O -acetyl-6-deoxy-6-nitro-α- d -glucopyranoside and 3,4,5,7-tetra- O -acetyl-2,6-anhydro-1-deoxy-1-nitro- d - glycero - l - manno -heptitol with carbon disulfide, methyl iodide, and sodium hydride gave methyl 2,3,4-di- O -acetyl-6,7-dideoxy-7,7-bis(methylthio)-6-nitro-α- d - gluco -hept-6-enopyranoside ( 3 ) and 4,5,6,8-tetra- O -acetyl-3,7-anhydro-2-deoxy-2-nitro-