(R)-5-(4-amino-2-fluorophenylamino)-3-((2,2-dimethyl-1,3-dioxolan-4-yl)methyl)-8-methylpyrido[2,3-d]pyrimidine-4,7(3H,8H)-dione 、
甲基磺酰氯 在
吡啶 作用下,
以68%的产率得到(R)-N-(4-(3-((2,2-dimethyl-1,3-dioxolan-4-yl)methyl)-8-methyl-4,7-dioxo-3,4,7,8-tetrahydropyrido[2,3-d]pyrimidin-5-ylamino)-3-fluorophenyl)methanesulfonamide