Treated with salicylaldehyde or its 5-methoxy derivative, a series of blocked terminal(E)-nitroenoses underwent a condensation reaction leading in fair to good yields to blocked 2-glycosyl-3-nitro-2H-chromene derivatives. Treated with cyanide, the nitro derivatives afforded 4-cyano-2-glycosyl-2H-chromenesviaan addition-elimination reaction. These two types of chromenes bearing an electron-withdrawing group have been previously shown to have antiviral or cytotoxic properties related to their electrophilicity.