1. A general preparation of acetylated sugar acid amides has been indicated. This offers an easier route to obtain the fully acetylated sugar acids. 2. The product of acetylation of amides of sugar acids is governed by the catalyst used. Concentrated sulfuric acid gives a product in which both hydroxyl groups and amide nitrogen are acetylated. Zinc chloride gives a product in which only hydroxyls are acetylated. The above methods have been applied to the preparation of ...
