5-bromo-2-[1-(4-isopropylbenzyl)azetidin-3-yloxy]pyridine 、 (S)-{2-((S)-2-cyanopyrrolidin-1-yl)-1-[2-fluoro-4-(4,4,5,5-tetramethyl-[1,3,2]dioxaborolan-2-yl)benzyl]-2-oxoethyl}carbamic acid tert-butyl ester 生成 (S)-[2-((S)-cyanopyrrolidin-1-yl)-1-(2-fluoro-4-{6-[1-(4-isopropylbenzyl)azetidin-3-yloxy]pyridin-3-yl}benzyl)-2-oxoethyl]carbamic acid tert-butyl ester