2-tert-butyl-5-((2-((tert-butyldimethylsilyloxy)methyl)-3-(1-methyl-6-oxo-5-(pyrimidin-4-ylamino)-1,6-dihydropyridin-3-yl)phenylamino)methyl)thiazole-4-carboxylic acid 、 methyl 2-tert-butyl-5-((2-((tert-butyldimethylsilyloxy)methyl)-3-(5-(3-cyclopropyl-1H-pyrazol-5-ylamino)-1-methyl-6-oxo-1,6-dihydropyridin-3-yl)phenylamino)methyl)thiazole-4-carboxylate 以125d was obtained as a yellow solid (crude)的产率得到methyl 2-tert-butyl-5-((2-((tert-butyldimethylsilyloxy)methyl)-3-(1-methyl-6-oxo-5-(pyrimidin-4-ylamino)-1,6-dihydropyridin-3-yl)phenylamino)-methyl)thiazole-4-carboxylate