、
(3aR,8aR)-6-chloro-2,2-dimethyl-4,4,8,8-tetraphenyltetrahydro[1,3]dioxolo[4,5-e][1,3,2]dioxaphosphepine 在
4-二甲氨基吡啶 、
三乙胺 作用下,
以
四氢呋喃 为溶剂,
以83%的产率得到(4R)-2-[(1E)-2-[3-[4-[[(3aR,8aR)-2,2-dimethyl-4,4,8,8-tetraphenyl-3a,8a-dihydro-[1,3]dioxolo[4,5-e][1,3,2]dioxaphosphepin-6-yl]oxy]phenyl]phenyl]-1-[(4R)-4-phenyl-1,3-oxazolidin-2-ylidene]ethyl]-4-phenyl-4,5-dihydro-1,3-oxazole