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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Síntese de 1,7-fenantrolinas e 7-aminoquinolinas trifluormetil substituídas / Synthesis of trifluoromethyl substituted 1,7-phenanthrolines and 7-aminoquinolines

Andrighetto, Rosalia 26 February 2010 (has links)
Conselho Nacional de Desenvolvimento Científico e Tecnológico / This work, at first, describes the synthesis and characterization of new series of (Z,Z)-N,N -bis(oxotrifluoroalkenyl)-1,3-phenylenediamines by the addition/elimination reaction of β-alkoxyvinyl trifluoromethyl ketones with 1,3-phenylenediamine, in 47-91 % yields. The 4-alkyl[aryl(heteroaryl)]-4-alkoxy-1,1,1-trifluoro-3-alken-2-ones, of general formula F3C-C(O)-CH=C(R1)-OR where R = Me, Et and R1 = H, Me, Ph, 4-MePh, 4-OMePh, 4-ClPh, 4-FPh, 4-BrPh, 4-NO2Ph, 2-furoyl, 2-thienyl, were obtained from trifluoroacetylation reactions of enolethers or acetals derived of acyclic ketones. Subsequently is reported the synthesis and characterization of new series of bis-trifluoromethyl substituted 1,7-phenanthrolines, from cyclization reactions of bis-enaminones in a strongly acidic medium (PPA) and absence of solvent, in 22-40 % yields, where for the first time two interesting manners of cyclization were observed, in the synthesis of two different angular structures. The products were identified as 2,8-bis(trifluoromethyl)-1,7-phenanthroline and 2,10-dialkyl(aryl)-4,8-(bis-trifluoromethyl)-1,7-phenanthrolines. The synthetic route used herein also allowed the isolation of new series of 7-aminoquinolines structures in 20-45 % yields. Compounds were characterized by 1H, 13C NMR spectroscopy, by Mass Spectrometry, their structures also were established by X-ray diffraction and their purity was confirmed by elemental analysis. / A presente dissertação inicialmente descreve a síntese e caracterização de uma nova série de (Z,Z)-N,N -bis(oxotrifluoralquenil)-1,3-fenilenodiaminas a partir da reação de adição/eliminação entre β-alcoxivinil trifluormetil cetonas e o dinucleófilo 1,3-fenilenodiamina, obtidas com rendimentos de 47-91 %. As 4-alcóxi-4-alquil[aril(heteroaril)]-1,1,1-triflúor-3-alquen-2-onas, de fórmula geral F3C-C(O)-CH=C(R1)-OR onde R = Me, Et e R1 = H, Me, Ph, 4-MePh, 4-OMePh, 4-ClPh, 4-FPh, 4-BrPh, 4-NO2Ph, 2-furil, 2-tienil foram obtidas a partir de reações de trifluoracetilação de enoléteres ou de acetais derivados de cetonas acíclicas. Subsequentemente é relatada a síntese e caracterização de uma nova série de 1,7-fenantrolinas bis-trifluormetil substituídas, obtidas a partir da reação de termociclização das bis-enamino cetonas em meio ácido PPA (ácido polifosfórico) na ausência de solvente, com rendimentos de 22-40 %. Duas interessantes maneiras de ciclização foram observadas na síntese dos iprodutos 2,8-bis(trifluormetil)-1,7-fenantrolina e 2,10-di(alquil/aril)-4,8-bis(trifluormetil)-1,7-fenantrolinas. Nesta segunda etapa é descrita a síntese e caracterização de uma nova série 2-aril[alquil(heteroaril)]-4-trifluormetil-7-aminoquinolinas, obtidas como co-produtos das reações de termociclização das bis-enamino cetonas em meio ácido PPA, em rendimentos de 20-45 %. Os compostos foram caracterizados por experimentos de RMN de 1H, RMN de 13C {1H}, por Espectrometria de Massas, Difração de Raios-X e sua pureza comprovada por Análise Elementar.

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