The one-step cyclocondensation of substituted isoflavones with cyanothioacetamide in the presence of sodium hydroxide gave an array of 3-cyano-5,6-diaryl pyridine-2(1H)-thiones in good yields. The procedure involves base-mediated ring opening of the isoflavones and subsequent Knoevenagel condensation between the 1,3-dicarbonyl intermediate generated from the isoflavones and cyanothioacetamide, followed
取代异
黄酮与
氰基
硫代乙酰胺 在......的存在下
氢氧化钠以良好的收率得到了3-
氰基-5,6-二芳基
吡啶-2(1 H)-
硫酮的阵列。该方法包括异
黄酮的碱介导的开环,以及随后由异
黄酮生成的1,3-二羰基中间体与Knoevenagel缩合。
氰基
硫代乙酰胺,然后进行闭环和脱
水。