2-propoxyethyl 3-aminobut-2-enoate 、
2-<1-(2-nitrobenzylidene)acetonyl>-2-oxo-1,3,2-dioxaphosphorinane 以
异丙醇 为溶剂,
以76%的产率得到2,6-Dimethyl-4-(2-nitro-phenyl)-5-(2-oxo-2λ
5-[1,3,2]dioxaphosphinan-2-yl)-1,4-dihydro-pyridine-3-carboxylic acid 2-propoxy-ethyl ester