(2R)-2-(trifluoromethyl)azetidine 、 benzyl (R)-(6-(7,7-difluoro-2-(methylsulfonyl)- 6,7-dihydro-5H-cyclopenta[d]pyrimidin-4-yl)-2,3-dihydrobenzofuran-3-yl)(oxetan-3-yl)carbamate 在
N,N-二异丙基乙胺 、 cesium fluoride 作用下,
以
乙腈 为溶剂,
生成 benzyl ((R)-6-(7,7-difluoro-2-((R)-2-(trifluoromethyl)azetidin-1-yl)-6,7-dihydro-5H-cyclopenta[d]pyrimidin-4-yl)-2,3-dihydrobenzofuran-3-yl)(oxetan-3-yl)carbamate