sodium hydroxide 、
3-(4-bromo-2-fluoro-phenyl)-4-fluoro-2,5-dioxo-2,3,5,6,7,8-hexahydro-1,3,5a-triaza-as-indacene-1-carboxylic acid tert-butyl ester 在
乙酸乙酯 、
水 、
Sodium sulfate-III 、
[7-(4-bromo-2-fluoro-phenylamino)-6-fluoro-5-oxo-1,2,3,5-tetrahydro-indolizin-8-yl]-carbamic acid tert-butyl ester 作用下,
反应 6.0h,
以to afford 1.15 g (28% yield) of [7-(4-bromo-2-fluoro-phenylamino)-6-fluoro-5-oxo-1,2,3,5-tetrahydro-indolizin-8-yl]-carbamic acid tert-butyl ester as the required product的产率得到[7-(4-bromo-2-fluoro-phenylamino)-6-fluoro-5-oxo-1,2,3,5-tetrahydro-indolizin-8-yl]-carbamic acid tert-butyl ester