Process for making activated aldarate esters, ester/lactones and lactones

摘要

A single step process for converting aldaric acid salts to activated aldarates utilizing a lower alkanol as both solvent and esterifying agent is described. The activated aldarates are particularly useful as monomers for polymerizations with primary diamines in which the nitrogen atoms are bound to aliphatic carbon atoms to form poly(aldaramides).