4-[2-(3,4-Dimethoxy-phenyl)-2-hydroxy-1-hydroxymethyl-ethoxy]-3-methoxy-benzaldehyde 在
copper(II) sulfate 作用下,
生成 (2S,3S)-3-{4-[(4R,5S)-4-(3,4-Dimethoxy-phenyl)-2,2-dimethyl-[1,3]dioxan-5-yloxy]-3-methoxy-phenyl}-2-[4-(5,5-dimethyl-[1,3]dioxan-2-yl)-2-methoxy-phenoxy]-3-hydroxy-propionic acid methyl ester