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Acetonylacetone, 2,5-dimethylfuran

Hexanedione [110-13-4] (acetonylacetone) is one of the most widely used 1,4-diketones. It is a colorless high boiling Hquid prepared by the hydrolysis of 2,5-dimethylfuran (332,333), by oxidation of 2,5-hexanediol (334) or 5-hexen-l-one (335), and from allylacetone (336). Its main use is in solvent systems and as a raw material for chemical synthesis. It is reportedly not highly toxic (336). [Pg.499]

Under similar conditions 2,5-dimethylfuran is ring-opened to acetonylacetone. [Pg.449]

Milas and Golubovic42 used paper and column chromatography and spectroscopic methods to study the reaction of acetonylacetone with hydrogen peroxide. Beside compound 37, a peroxide (38) with the tetrahydrofuran structure is also reported to be formed.42 Seebach43 also obtained 37 from 2,5-dimethylfuran, 85% hydrogen peroxide, and a little 10% sulfuric acid (see Section II, A, 5). 37 forms a dibenzoate.43... [Pg.175]

For example, using an acidic H-ZSM-5 with Si/Al = 300 at 350 °C 2,5-dimethylfuran DMF is produces with 96.1 % yield at 99.8 % conversion of acetonylacetone. On the other hand, if this zeolite is doped with alkali ions in excess of their framework Al-content (Si/Al = 300, Na/Al = 7.6) then 89.1 % yield of methylcyclopentenone MCP is obtained at quantitative conversion. Only a 4.4 I yield of DMF is. observed using that basic zeolite catalyst. The number of alkali ions which are in excess of the corresponding Al content of the zeolite framework are associated with the internal silyloxy groups in the as - synthesized form of high silica zeolites. The behaviour of such a Na-ZSM-5 is very much like sodium silicalite. [Pg.592]

Scheme 12 Cyclization of acetonylacetone to 2,5-dimethylfuran (acid sites) and 3-methyl-2-cyclopentenone (basic sites)... Scheme 12 Cyclization of acetonylacetone to 2,5-dimethylfuran (acid sites) and 3-methyl-2-cyclopentenone (basic sites)...

See other pages where Acetonylacetone, 2,5-dimethylfuran is mentioned: [Pg.208]    [Pg.603]    [Pg.180]    [Pg.603]    [Pg.14]    [Pg.26]    [Pg.154]    [Pg.26]   
See also in sourсe #XX -- [ Pg.197 ]




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Acetonylacetone

Dimethylfuran

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