S 98 Synthesis of 2,6-bis-polyfluoroalkyl-4H-pyran-4-ones [Text] / D. S. Yachevskii, D. L. Chizhov, K. I. Pashkevich, V. N. Charushin // ARKIVOC. - 2004. - № 11. - P71-76. - Библиогр. : с. 75 (9 назв.) Рубрики: ХИМИЧЕСКИЕ НАУКИ Аннотация: A convenient synthesis is described of 2,6-bis-polyfluoroalkyl-4H-pyran-4-ones having symmetrical and asymmetrical structures, by dehydration of bis-polyfluoroalkyl- containing 1,3,5-triketones. \\\\expert2\\nbo\\ARKIVOC\\2004, p.71-76.pdf |
F 76 Formation of fluoroalkyl-containing pyran-4-one in the reaction of lithium 4,4,4-trifluoro-1-phenylbutane-1,3-dionate with oxalyl chloride [Electronic resource] / O. P. Krasnykh, G. G. Aleksandrov, N. S. Karpenko, V. I. Filyakova, V. N. Charushin // Russian Chemical Bulletin (Translation of Izvestiya Akademii Nauk, Seriya Khimicheskaya). - 2007. - Vol. 56, № 1. - P178-180 Рубрики: ХИМИЧЕСКИЕ НАУКИ \\\\Expert2\\nbo\\Russian Chemical Bulletin\\2007, 56 (1), 178.pdf |
U 52 Unexpected formation of diethyl 2-ethoxy-6-CF.sub.3-2H-pyran-3,5-dicarboxylate from the condensation of ethyl 4,4,4-trifluoroacetoacetate with CH(OEt).sub.3 / Y. S. Kudyakova, D. N. Bazhin, P. A. Slepukhin, Ya. V. Burgart, V. I. Saloutin, V. N. Charushin // Tetrahedron Letters. - 2017. - Vol. 58, № 8. - P744-747 Рубрики: ХИМИЧЕСКИЕ НАУКИ Кл.слова (ненормированные): PYRAN -- DETRIFLUOROACETYLATION -- ETHYL TRIFLUOROACETOACETATE -- CONDENSATION -- PYRIDINES Аннотация: The one-step preparation of diethyl 2-ethoxy-6-CF3-2H-pyran-3,5-dicarboxylate via the condensation of ethyl 4,4,4-trifluoroacetoacetate with CH(OEt)3 has been reported and a plausible mechanism for this transformation is discussed. To demonstrate the synthetic potential of the obtained pyran, the reactions with ammonia and aromatic amines to give trifluoromethylated pyridine derivatives are presented. |