(R)-ethynyl p-tolyl sulfoxide 、
ethyl 2-[(2R,4aR,6S,7R,8aS)-7-hydroxy-2-phenyl-4,4a,6,7,8,8a-hexahydropyrano[3,2-d][1,3]dioxin-6-yl]acetate 在
lithium hexamethyldisilazane 作用下,
以
四氢呋喃 为溶剂,
反应 1.0h,
以91%的产率得到ethyl 2-((2R,4aR,6S,7R,8aS)-2-phenyl-7-(((Z)-2-((S)-p-tolylsulfinyl)vinyl)oxy)hexahydropyrano[3,2-d][1,3]dioxin-6-yl)acetate