Patent ID: 8431712

Claim:
A method for preparing pyridoxamine, or salt thereof, the method comprising the steps of: (a) protecting the hydroxyls of a compound of formula (II), or salt thereof, to form a compound of formula (III), or salt thereof: wherein R at each occurrence is a hydroxyl protecting group, wherein R is selected from the group consisting of alkanoyl, arylcarbonyl, lower alkoxycarbonyl; lower alkenyloxycarbonyl; and aryl lower alkoxycarbonyl; (b) converting the compound of formula (III), or salt thereof, to a compound of formula (IV), or salt thereof: and wherein represents a cyclic imide substituent; (c) converting the compound of formula (IV), or salt thereof, to a compound of formula (V) wherein R 1 is H or is R, wherein when R 1 is R, step (c) is followed by (d), wherein step (d) comprises: (d) converting the compound of formula (V), or salt thereof, to a compound of formula (I), or a salt thereof: