S 98 Synthesis of 2,6-bis(fluoroalkyl)-2,6-dihydroxytetrahydro-2H-pyran-3,5-dicarboxylates from aldehydes and fluorinated beta-oxo esters in the presence of ionic liquid-K2CO3 as catalytic system [Electronic resource] / S. G. Zlotin, G. V. Kryshtal’, G. M. Zhdankina, A. V. Ignatenko, Ya. V. Burgart, V. I. Saloutin, O. N. Chupakhin // Russian Journal of Organic Chemistry (Translation of Zhurnal Organicheskoi Khimii). - 2010. - Vol. 46, № 4. - P468-473 : рис., табл. - Bibliogr. : p. 472-473 (35 ref.) Рубрики: ХИМИЧЕСКИЕ НАУКИ Кл.слова (ненормированные): DICARBOXYLATES -- ALDEHYDES -- ESTERS -- CATALYTIC SYSTEM Аннотация: An efficient procedure has been developed for the synthesis of 4-substituted 2,6-bis(fluoroalkyl)-2,6-dihydroxytetrahydro-2H-pyran-3,5-dicarboxylates by reactions of aldehydes with fluorine-containing ?-oxo esters in heterogeneous catalytic system 1-butyl-3-methylimidazolium tetrafluoroborate [bmim][BF4]-K2CO3 activated by ultrasound. The system retains its catalytic activity for three reaction cycles. \\\\Expert2\\nbo\\Russian Journal of Organic Chemistry\\2010, 46 (4), 468-473.pdf |