(E)-3-(2-Hydroxy-naphthalen-1-yl)-2-methyl-propenal 、 Diethyl 2-(2,4-dioxo-1-methylpyrrolidin-3-yl)-2-oxoethylphosphonate 在
potassium tert-butylate 作用下,
生成 3-[(2E,4E)-1-Hydroxy-5-(2-hydroxy-naphthalen-1-yl)-4-methyl-penta-2,4-dien-(Z)-ylidene]-1-methyl-pyrrolidine-2,4-dione