Showing papers on "Glycal published in 1954"

The 2-hydroxyglycals.

Abstract: Publisher Summary This chapter provides an overview of 2-hydroxyglycals. The 2-hydroxyglycals are anhydrosugars derived from the cyclic form by loss of the hydroxyl group from C1 and the hydrogen atom from C2. They differ from the parent glycal by the replacement of H by OH at C2. They are known in the form of O -acetyl, O -benzoyl, and O -methyl derivatives. The conditions of the reaction with diethylamine are similar to those used for the preparation of glycosylamines. The chapter discusses the various reactions of 2-hydroxyglycals like hydrogenation, oxidation by permanganate, conversion to ozone hydrates, reaction with phenylhydrazine, conversion of esters to kojic acid, and deacetylation of acetates. Hydrogenation of the acetates of the 2-hydroxyglycals takes place smoothly when they are subjected to the procedures of low-pressure and catalytic hydrogenation. Two atoms of hydrogen are consumed, as required by the single double bond.