methyl 3,3,3-trifluoro-2-(5-formyl-2-(2-((methylsulfonyloxy)methyl)pyrrolidin-1-yl)furan-3-yl)-2-hydroxypropanoate 在
sodium hydride 作用下,
以
四氢呋喃 、 mineral oil 为溶剂,
以52%的产率得到methyl (10S)-4-formyl-7-(trifluoromethyl)-3,8-dioxa-1-azatricyclo[8.3.0.02,6]trideca-2(6),4-diene-7-carboxylate