diethyl trifluoromethylsulfonylmethylphosphonate 、 (rel)-(1'S,4'S)-9-(4-hydroxy-2',2'-difluorocyclopentan-1-yl)-2-fluoro-6-chloropurine 在
lithium tert-butoxide 作用下,
以
四氢呋喃 为溶剂,
以59%的产率得到(rel)-(1'S,4'S)-diethyl [9-(4-hydroxymethyl-2',2'-difluorocyclopentan-1-yl)-2-fluoro-6-chloropurine]phosphonate