(2S,3S)-3-fluoro-2-methylazetidine 、 methyl 2-(1-(7,7-difluoro-2-(methylsulfonyl)-6,7-dihydro-5H-cyclopenta[d]pyrimidin-4-yl)pyrrolidin-3-yl)acetate 在
N,N-二异丙基乙胺 作用下,
以
异丙醇 为溶剂,
以77%的产率得到methyl 2-(1-(7,7-difluoro-2-((2S,3S)-3-fluoro-2-methylazetidin-1-yl)-6,7-dihydro-5H-cyclopenta[d]pyrimidin-4-yl)pyrrolidin-3-yl)acetate