2-<1-acetyl-2-(2-difluoromethoxyphenyl)ethenyl>-5,5-dimethyl-2-oxo-1,3,2-dioxaphosphorinane 、
3-氨基巴豆酸甲酯 以
异丙醇 为溶剂,
以39%的产率得到4-(2-Difluoromethoxy-phenyl)-5-(5,5-dimethyl-2-oxo-2λ
5-[1,3,2]dioxaphosphinan-2-yl)-2,6-dimethyl-1,4-dihydro-pyridine-3-carboxylic acid methyl ester