Synthesis and Properties of Fluorine-Containing Heterocyclic Compounds. III. Substituted Tetrahydropyrans<sup>1</sup>
作者:Adrienne Steinacker Dey、Madeleine M. Joullié
DOI:10.1021/jo01020a528
日期:1965.9
Synthesis of 2,6-bis(fluoroalkyl)-2,6-dihydroxytetrahydro-2H-pyran-3,5-dicarboxylates from aldehydes and fluorinated β-oxo esters in the presence of ionic liquid-K2CO3 as catalytic system
作者:S. G. Zlotin、G. V. Kryshtal’、G. M. Zhdankina、A. V. Ignatenko、Ya. V. Burgart、V. I. Saloutin、O. N. Chupakhin
DOI:10.1134/s1070428010040020
日期:2010.4
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 beta-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.
BALICKI, R.;NANTKA-NAMIRSKI, P., POL. J. CHEM., 1981, 55, N 11, 2439-2444