Glycerol 1,2-and 1,3-dinitrateJ prepared from the corresponding dibromohydrins of glycerol, are characterised by reaction with aromatic acid chlorides. The 1,Z-dinitrate is also obtained by the action of iodinesilver nitrate on allyl alcohol; derivatives of the dinitrate are prepared similarly from allyl esters and by nitration of l-glycerides. Partial nitration of glycerol gives glycerol 1,3-dinitrate, also obtained by mild nitration of glycidol (2,3-epoxypropan-l-o1) nitrate. Denitration of glycerol trinitrate by sodium nitrite or potassium hydroxide in aqueous ethanol and by sulphuric acid confirms that the secondary nitric ester group is displaced more readily.
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