8-methyl-2-methylsulfanyl-6-[2-methyl-5-(4H-[1,2,4]triazol-3-yl)-phenyl]-8H-pyrido[2,3-d]pyrimidin-7-one 、 Potassium;oxido hydrogen sulfite 、 、
4-氨基四氢吡喃 以to give 8-methyl-6-[2-methyl-5-(4H-[1,2,4]triazol-3-yl)-phenyl]-2-(tetrahydro-pyran-4-ylamino)-8H-pyrido[2,3-d]pyrimidin-7-one的产率得到8-methyl-6-[2-methyl-5-(4H-[1,2,4]triazol-3-yl)-phenyl]-2-(tetrahydro-pyran-4-ylamino)-8H-pyrido[2,3-d]pyrimidin-7-one