A set of 5-(2-hydroxybenzoyl)-pyrid-2-ones, which are analogous to cardiotonic drugs such as milrinone, has been prepared in high yield by recyclization of 3-formylchromones with acetic acid amides having at the α-position an electron-withdrawing group. The best reaction conditions were found to be heating in DMF in the presence of Me3SiCl as a promoter and water scavenger.
一组5-(2-羟基苯甲酰)-
吡啶-2-酮的化合物,类似于
米利酮等强心药,通过将3-醛基
香豆素与在α位具有电子吸引基团的
乙酸酰胺进行再环化高产量制备而成。最佳反应条件是将反应体系加热于
DMF中,并添加Me3SiCl作为
促进剂和脱
水剂。