O-57 One-pot synthesis of 5-fluoroalkyl-5-hydroxy-4-hydroxy-imino-1-isonicotinoyl-4,5-dihydro-1H-pyrazoles and their tuberculostatic activity [Electronic resource] / O. G. Khudina, Ya. V. Burgart, V. I. Saloutin, M. A. Kravchenko // Russian Journal of Organic Chemistry (Translation of Zhurnal Organicheskoi Khimii). - 2011. - Vol. 47, № 6. - P904-909 : ил. - Bibliogr. : p. 909 (6 ref.) Рубрики: ХИМИЧЕСКИЕ НАУКИ Аннотация: -Fluoroalkyl-5-hydroxy-4-hydroxyimino-1-isonicotinoyl-4,5-dihydro-1H-pyrazoles were synthesized via a one-pot procedure from polyfluoroalkyl-containing 1,3-diketones, sodium nitrite in acetic acid, and isoniazid. Acetylacetone gave rise to 3-hydroxyiminopentane-2,4-dione monoisonicotinoylhydrazone which underwent intramolecular cyclization to 5-hydroxy-4-hydroxyimino-1-isonicotinoyl-3,5-dimethyl-4,5-dihydro-1H-pyrazole on heating in ethanol. The synthesized compounds exhibited moderate tuberculostatic activity \\\\Expert2\\nbo\\Russian Journal of Organic Chemistry\\2011, 47 (6), 904.pdf |