The acylation reaction of secondary (R1 = H) β-enamino ketones [RCOCH=CHNR1R2, where R = CF3, CCl3, Ph, 4-FC6H4, 4-NO2C6H4, thien-2-yl; R1 = H, Me; R2 = Me, Bn, Ph, 4-NO2C6H4] with trifluoroacetic anhydride or ethyl oxalyl chloride in pyridine led regiospecifically to a series of 14 N-acylated enaminones in good yields (72-88%). On the other hand, when tertiary enaminones (R1, R2 = Me) were used, the acylation reaction led to a series of 12 C-acylated enaminones in good to excellent yields (75-92%).
二级(R1 = H)β-烯
亚胺酮[RCOCH=CHNR1R2,其中R =
CF3,
CCl3, Ph, 4-FC6H4, 4-NO2C6H4, thien-2-yl;R1 = H, Me;R2 = Me, Bn, Ph, 4-NO2C6H4]与
三氟乙酸酐或乙氧基
草酸氯化物在
吡啶中反应,选择性地生成了一系列产率良好的14种N-酰基化的烯
亚胺酮(72-88%)。另一方面,当使用三级烯
亚胺酮(R1, R2 = Me)时,酰化反应生成了一系列产率良好至优越的12种C-酰基化的烯
亚胺酮(75-92%)。