isopropyl 5-{3-[(4R)-4-formyl-2-oxo-1,3-oxazinan-3-yl]propyl }thiophene-2-carboxylate 、 sodium salt of dimethyl [3-(3-bromophenyl)-3,3-difluoro-2-oxopropyl]phosphonate 在
zinc(II) chloride 作用下,
以
四氢呋喃 为溶剂,
生成 isopropyl 5-(3-{(4R)-4-[(E)-4-(3-bromophenyl)-4,4-difluoro-3-oxobut-1-en-1-yl]-2-oxo-1,3-oxazinan-3-yl}propyl)thiophene-2-carboxylate