tert-butyl N-[1-(pyrrolidin-3-yl)ethyl]carbamate 、
7-amino-8,9-difluoro-3-methyl-2,3-dihydro-1-oxa-3a,5-diazaphenalene-4,6-dione 在
三乙胺 作用下,
以
乙腈 为溶剂,
生成 {(S)-1-[(R)-1-(7-amino-8-fluoro-3-methyl-4,6-dioxo-2,3,5,6-tetrahydro-4H-1-oxa-3a,5-diazaphenalen-9-yl)pyrrolidin-3-yl]ethyl}carbamic acid tert-butyl ester