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- W2788893873 abstract "This work presents a simple and versatile strategy for the synthesis of new 4 and N-sustituted 5-trifluoromethyl-pyrazoles. These compounds were obtained by the reaction of 3-trifluoroacetyl-4,5-dihydrofuran and 3-Trifluoroacetyl-5,6-dihydro-4Hpyran with heteroaryl(aryl/alkyl)hydrazines (RNHNH2, where R= COCH₂CN, (4- Py)CO, (3-Py)CO, 4-Py(2-Cl)CO e (4-SO₂NH₂)Ph), in the presence of trifluoroboroetherete in methanol, furnishing the respective 5-trifluoromethyl-4-alkyl-1N-sustitutedpyrazoles, in moderate yields (17-59%). The pyrazoles obtained in this study were identified by NMR 1H, NMR 13C and Mass Espectroscopy.%%%%Este trabalho apresenta uma estrategia sintetica simples e versatil para a preparacao de uma serie inedita de 5-trifluormetilpirazois 4 e 1N-substituidos. Os pirazois foram obtidos a partir da reacao do 3-trifluoracetil-4,5-diidrofurano e 3-trifluoracetil-5,6-diidro-4H-pirano com heteroaril(aril/alquil)hidrazinas (RNHNH2, onde R= COCH₂CN, (4-Py)CO, (3-Py)CO, 4-Py(2-Cl)CO e (4-SO₂NH₂)Ph), com a presenca de trifluorboro eterato em metanol, produzindo os respectivos pirazois 5- trifluormetil-4-alquil-1N-substituidos com rendimentos moderados (17-59%). Os pirazois obtidos neste trabalho foram identificados por Ressonância Magnetica Nuclear de Hidrogenio, Ressonância Magnetica Nuclear de Carbono-13 e Espectroscopia de Massas." @default.
- W2788893873 created "2018-03-06" @default.
- W2788893873 creator A5013832957 @default.
- W2788893873 date "2009-02-26" @default.
- W2788893873 modified "2023-09-24" @default.
- W2788893873 title "Síntese de alguns Pirazóis derivados do 3-trifluoracetil-4,5-diidrofurano e 3-trifluoracetil-5,6-diidro-4H-pirano." @default.
- W2788893873 hasPublicationYear "2009" @default.
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