A concise and efficient one-pot synthesis of chroman-2,4-dione-based HKA derivatives by three component reaction of HKAs, triethoxymethane and 4-hydroxycoumarin derivatives under solvent-free and catalyst-free conditions is described. This protocol has many advantages, in that the GAP (Group-Assistant-Purification) chemistry process is involved in this method. As a result, the experimenter can avoid cumbersome process steps such as traditional chromatography and recrystallization purifications. The desired products can be easily obtained by washing the crude products with 95% EtOH.
描述了一种简洁高效的单锅合成方法,通过在无溶剂和无催化剂的条件下,将HKA、三乙氧基
甲烷和
4-羟基
香豆素衍
生物进行三组分反应,合成了基于色烯-2,4-二酮的HKA衍
生物。该方法具有许多优点,因为其中涉及了GAP(群助纯化)
化学过程。因此,实验者可以避免传统色谱和重结晶纯化等繁琐的过程步骤。所需产物可以通过用95%
乙醇洗涤粗产物轻松获得。