The reaction of acetylacetone or sodium salt of oxymethyleneacetone with corresponding aldehydes has been used to prepare 3,5-diacetyl-1,4-dihydropyridines III which have been oxidized to diacetylpyridines VII. These compounds have been transformed by an acid-catalyzed reaction with benzaldehyde into the chalcones VIII which have been utilized for the Kröhnke synthesis of luminophoric terpyridines I and II.
已经使用乙酰丙酮或氧亚甲基丙酮钠盐与相应的醛反应来制备3,5-二乙酰-1,4-二氢吡啶III,这些化合物已经被氧化成二乙酰吡啶VII。这些化合物经过酸催化与苯甲醛反应转化为香豆素VIII,用于合成发光吡啶I和II的Kröhnke合成。