Journal of Fluorine Chemistry
V. I. Saloutin, Ya. V. Burgarta, O. G. Kuzuevaa, C. O. Kappe, and O. N. Chupakhina, "Biginelli condensations of fluorinated 3-oxo esters and 1,3-diketones", Volume 103, Issue 1, 3 April 2000, 17-23
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http://dx.doi.org/10.1016/S0022-1139(99)00216-XСпасибо