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2,5-Hexanedione is used as a reagent in the preparation of trans-2,5-dimethylpyrrolidine. It is also used in the synthesis of 2,5-dimethylpyrroles. Further, it plays an important role as a reagent used for the protection of amino groups in amino sugars and nucleosides. In addition to this, it is used in the preparation of five-membered heterocycles like indane-type and benzannulated systems. It is also employed as a precursor in Diels-alder cycloaddition reactions.
Primary amines can be protected by conversion to 2,5-dimethylpyrroles, from which they can be released by reaction with hydroxylamine hydrochloride: J. Chem. Soc., Perkin 1, 2801 (1984). The method has been found useful for protecting amino sugars in oligosaccharide synthesis: J. Org. Chem., 63, 4570 (1998), and also in the protection of an arylamine during Cu(I) promoted methoxylation of a ring bromo or iodo substituent; Synthesis, 1599 (1998).
Sacia, E. R.; Deaner, M. H.; Louie, Y. L.; Bell, A. T. Synthesis of biomass-derived methylcyclopentane as a gasoline additivevia aldol condensation/hydrodeoxygenation of 2,5-hexanedione. Green Chem. 2015, 17 (4), 2393-2397.
Chambon, F.; Rataboul, F.; Pinel, C.; Cabiac, A.; Guillon, E.; Essayem, N. Conversion of cellulose to 2,5-hexanedione using tungstated zirconia in hydrogen atmosphere. Appl. Catal., A 2015, 504, 664-671.
Hazard Statements: H227-H302-H332-H315-H319-H361-H335-H373
Combustible liquid. Harmful if swallowed. Harmful if inhaled. Causes skin irritation. Causes serious eye irritation. Suspected of damaging fertility or the unborn child. May cause respiratory irritation. May cause damage to organs through prolonged or repeated exposure.
Precautionary Statements: P210u-P260-P201-P305+P351+P338-P405-P501a
Keep away from heat/sparks/open flames/hot surfaces. - No smoking. Do not breathe dust/fume/gas/mist/vapours/spray. Obtain special instructions before use. IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing. Store locked up. Dispose of contents/container in accordance with local/regional/national/international regulations.