β-Dicarbonyl compounds with the ketene dithioacetyl fragment were obtained by condensation of acetyl ketene dithioacetals with ethyl polyfluorocarboxylates and diethyl oxalate in the presence of NaH in Et2O at room temperature in 65–94% yields. These compounds can be used for the synthesis of 6-polyfluoroalkyl(ethoxycarbonyl)-2-methylsulfanyl-4-pyrones.
具有
乙烯基二
硫代乙酰基片段的β-二羰基化合物是通过在
乙腈中,在NaH存在下,于室温在室温下以65-94%的收率,将乙酰基
乙烯酮二
硫缩醛与多
氟羧酸乙酯和
草酸二乙酯缩合而制得。这些化合物可用于合成6-聚氟烷基(乙氧基羰基)-2-甲基
硫烷基-4-
吡喃酮。