| abstract |
PROBLEM TO BE SOLVED: To provide a method for producing a sialic acid derivative suitable for industrial production and a novel sialic acid derivative, in which cytidine can be used without protection and the number of steps can be greatly reduced. A method for producing a sialic acid derivative represented by formula (1), comprising reacting a compound represented by formula (2) with cytidine. [Chemical 1] (In the formula, R 2 represents an acyl group, a silyl group, an allyl group, a benzyl group, a trityl group, or an acetal group. X + and Y + represent the same or different cations.) [Chemical 2] |