Conselho Nacional de Desenvolvimento Científico e Tecnológico / The synthesis of two 1-methyl-3-alkylimidazolium tetrafluoroborate (where alkyl = butyl, octyl; [BMIM]BF4 and [OMIM]BF4) based on room temperature ionic
liquids (RTIL) is reported. The usefulness of these ionic liquids in organic synyhesis was evaluated through three reactions such as: (i) preparation of the N,N-dimethylenaminones (RCOCH=CHNMe2, where R = Ph, 4-Me-Ph, 4-F-Ph, 4-Cl-Ph, 4-Br-Ph, 4-O2N-Ph, fur-2-yl,
tien-2-yl, pyrrol-2-yl, pyrid-2-yl, CH(OMe)2, octyl) from the condensation reaction of N,Ndimethylformamide
dimethyl acetal with methylketones; (ii) preparation of the 6-dimethylamino-1,1,1-trifluoro-4-methoxy-3,5-dien-2-one [CF3COCH=CH(OMe)CH=CHNMe2, from the condensation reaction of N,Ndimethylformamide dimethyl acetal with appropriated 1,1,1-trifluoro-4-methoxy-3-penten-2-
one and (iii) N-alkylation reaction of 3,5-dimethyl- and 5-trifluoromethyl-3-methyl-1Hpyrazoles, from the reaction of the N-H pyrazoles with alkyl halides (R1 X, where R1 = Bu,
octyl, allyl, benzyl, CH₂CH₂CONEt₂). The reaction time, and the yields were investigated and this method showed advantages over the methods described in the literature. / Neste trabalho é relatado a síntese de dois líquidos iônicos, tetrafluorborato de 1-alquil-3-metil imidazolíneo, com alquil = butil, octil ([BMIM]BF4 and [OMIM]BF4) e sua utilização como meios reacionais. A adequabilidade dos líquidos iônicos foi avaliada em três reações: (i) síntese de N,N-dimetilenaminonas (RCOCH=CHNMe2, com R = Ph, 4-Me-Ph, 4-F-Ph, 4-Cl-Ph, 4-Br-Ph, 4-O2N-Ph, fur-2-il, tien-2-il, pirrol-2-il, pirid-2-il, CH(OMe)2, octil) a partir da reação de condensação N,N-dimetilformamida dimetilacetal
com metilcetonas; (ii) síntese de 6-dimetilamino-1,1,1-trifluor-4-metoxi-3,5-dien-2-ona [CF3COCH=CH(OMe)CH=CHNMe2, a partir da reação de condensação de N,Ndimetilformamida
dimetilacetal com 1,1,1-trifluor-4-metoxi-3-penten-2-ona e (iii) reação de N-alquilação de 3,5-dimetil- and 5-trifluorometil-3-metil-1H-pirazol, a partir da reação de NH pirazóis com haletos de alquila (R¹ X, com R¹ = Bu, octil, alil, benzil, CH₂CH₂CONEt₂). O tempo reacional e os rendimentos foram avaliados e o método mostrou vantagens em relação aos outros métodos descritos na literatura.
| Identifer | oai:union.ndltd.org:IBICT/oai:repositorio.ufsm.br:1/10438 |
| Date | 15 February 2007 |
| Creators | Frizzo, Clarissa Piccinin |
| Contributors | Martins, Marcos Antonio Pinto, Zanatta, Nilo, Flores, Alex Fabiani Claro |
| Publisher | Universidade Federal de Santa Maria, Programa de Pós-Graduação em Química, UFSM, BR, Química |
| Source Sets | IBICT Brazilian ETDs |
| Language | Portuguese |
| Detected Language | English |
| Type | info:eu-repo/semantics/publishedVersion, info:eu-repo/semantics/masterThesis |
| Format | application/pdf |
| Source | reponame:Repositório Institucional da UFSM, instname:Universidade Federal de Santa Maria, instacron:UFSM |
| Rights | info:eu-repo/semantics/openAccess |
| Relation | 100600000000, 400, 500, 500, 500, 500, c28419d9-6027-4f9c-acd2-76e8067a85d1, b06094d2-6b79-47fd-bffa-1115ace26567, 12036c3b-18f6-4b7d-ad7e-5fd56bfce1d7, 17a00027-8984-4561-9228-46697f540c2b |
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