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Acetonylacetone cyclization

Claisen-Schmidt condensation, and acetonylacetone cyclization Aryl coupling reactions (Suzuki, Heck, and Pd-exchanged mesoporous catalysts High activity and reusability avoiding the usual problem of Pd [184]... [Pg.232]

Acetonylacetone, CHjCOCHiCHjCOCHi, is cyclized to 2,5-dimethyl-pyrrole by heating to 100° with ammonium carbonate. The yield is 86%. This reaction has been modified and extended to the syntheses of N-alkyl-2,5 dimethylpyrroles by the substitution of amines for ammonia and removal of water by azeotropic distillation with benzene ... [Pg.425]

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)...
Dessau [220] introduced the cyclization of diketones as a possible test reaction for distinguishing between the acid and base sites of alkaU-exchanged ZSM-5. 2,5-Hexanedione (acetonylacetone) is converted to dimethylfman via the acid-catalyzed pathway and to methylcyclopentenone via the base-catalyzed route (see Scheme 12). [Pg.203]

See other pages where Acetonylacetone cyclization is mentioned: [Pg.153]    [Pg.196]    [Pg.153]    [Pg.196]    [Pg.252]    [Pg.471]    [Pg.592]    [Pg.359]   
See also in sourсe #XX -- [ Pg.196 ]



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Acetonylacetone

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