A series of novel 3′-(alkyl(hydroxy)amino)-2′-fluoronucleoside analogs were prepared via conjugate addition of N-methylhydroxylamine to various 2-fluorobutenolides. The adducts 13a and 16 were obtained as single isomers under absolute control of stereochemistry. The crucial N-demethylation of 23–25 was readily achieved by means of DDQ oxidation, followed by nitrone/oxime exchange reaction. By this