5-bromo-1-methyl-3-(4-morpholinophenylamino)pyrazin-2(1H)-one 、 2-(5-tert-butyl-1-oxoisoindolin-2-yl)-6-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)benzyl acetate 以afforded 108 in 47% yield (205 mg) as an amorphous yellow solid的产率得到5-tert-butyl-2-(2-(hydroxymethyl)-3-(4-methyl-6-(4-morpholinophenylamino)-5-oxo-4,5-dihydropyrazin-2-yl)phenyl)isoindolin-1-one