Methyl 4-[(4-methoxyphenyl)methoxymethyl]-4-methyl-2-oxocyclopentane-1-carboxylate 、
2-[N,正双(三氟甲烷烷磺酰)氨基]-5-氯吡啶 在
sodium hydride 作用下,
以
四氢呋喃 为溶剂,
以95%的产率得到Methyl 4-[(4-methoxyphenyl)methoxymethyl]-4-methyl-2-(trifluoromethylsulfonyloxy)cyclopentene-1-carboxylate