5-tert-butyl-2-(2-(hydroxymethyl)-3-(1-methyl-6-oxo-5-(pyrimidin-4-ylamino)-1,6-dihydropyridazin-3-yl)phenyl)isoindolin-1-one 、
tert-Butyl 3-(3-(6-Chloro-2-methyl-3-oxo-2,3-dihydropyridazin-4-ylamino)-1H-pyrazol-1-yl)azetidine-1-carboxylate 、 2-(5-tert-butyl-1-oxoisoindolin-2-yl)-6-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)benzyl acetate 以afforded a crude product 105d which的产率得到tert-Butyl 3-(3-(6-(3-(5-tert-butyl-1-oxoisoindolin-2-yl)-2-(hydroxy-methyl)phenyl)-2-methyl-3-oxo-2,3-dihydropyridazin-4-ylamino)-1H-pyrazol-1-yl)-azetidine-1-carboxylate